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Excel CARE Control Icons User Guide

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1. 74 5577 10 US 180 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS EXAMPLES Attenuator Purpose Control Icons Example In many applications the desired calculation is not based on a momentary value such as outdoor air temperature but is averaged over an hour Instead of an exact mean value you can calculate a good approximation by attenuating the value For example the following formula approximates outdoor air temperature Approx OATnew INT MomentaryOAT Approx OATojq INT stands for an integral function Use the SWI MAT and DIF control icons The following diagram shows the control loop and switching table setup for this application outdoor sensor XD1_SW1 1 STARTUP MAT X average_oat_new INRT difference difference average_oat The closed loop control symbol DIF calculates the differential between the momentary outdoor temperature and the old approximate outdoor temperature The MAT symbol provides a formula to integrate the difference INT function The integral function uses TI reset time equal to 60 minutes and has a limit value LIM of 50C 122F Note that the difference pseudopoint is an analog flag It does not have to be available for operator display The MAT output calculates the appropriate outdoor temperature During equipment start up actual outdoor temperature overrides the calcul
2. cnet There are always default values for the parameters You can change any of the default values as desired If you click Cancel the dialog box closes and software does NOT place the control icon in the control strategy You can redisplay the internal parameters dialog box at any time by clicking the right hand mouse button while the cursor is over the control icon in the control strategy After you place the control icon and close the internal parameters dialog box if any you can click the icon once left hand mouse button to display the I O dialog box This dialog box always shows output variables on the left the control icon in red and input variables on the right For example the PID icon displays the following dialog box PID controller Output Mi O lt Inputs Engineering Value Unit Table ID You need to connect the Y X and W variables to either physical points pseudopoints and or other control icons Variables on the left Y in this case are always outputs Variables on the right X and W in this case are always inputs The icon descriptions in the Alphabetic Reference chapter define the types of connection that are valid for each variable The two blank rectangles in the dialog box are editing fields where you can enter values instead of point or icon connections For example in the PID dialog box you 2 CARE CONTROL ICONS See Also gt INTRODUCTION can type an engine
3. 25 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS IDT Example 2 In Example 1 there may be an additional requirement to send the ADD output signal not only to one analog point but also to several analog and digital points The digital pseudopoints should show if at least one pump is running The following diagram shows how this example is accomplished pump switching application pumps_running The ADD output now connects to two additional IDT icons to increase the number of connectable analog outputs One of the additional IDTs outputs to two analog points The other IDT outputs to two digital pseudopoints The digital pseudopoints indicate when at least one pump is running 74 5577 10 US 26 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Digital Switch 2PT Function On off controller that transmits a digital status depending on two analog input values one is a controlled variable the other a reference variable and a hysteresis parameter 1 0 Dialog Box Inputs Output Internal Parameters Hysteresis Parameter Number Descriptions Formulas On off controller Two analog inputs where X Controlled variable such as an outdoor air temperature sensor W Reference variable such as a setpoint You can enter the reference variable W as a parameter engineering unit index number and value One digital o
4. To set up a nonlinear sensor with generic 0 100 percent input value proceed as in the previous paragraph for nonlinear direct reading sensors except set sensor range P2 to the actual range of the input sensor that is the sensor value that produces 100 percent at the input To set up a linear sensor with direct reading input value Set the velocity constant P4 to 1 Set the area factor P5 to the duct or pipe cross sectional area if the sensor is calibrated for velocity or set P5 to 1 if the sensor is calibrated for flow Set the square root enable P1 to 0 e If desired set the low display value P6 to about 5 percent of the maximum expected output so that the output reads zero when the associated system is off For other parameters use default values To set up a linear sensor with generic 0 100 percent input value Proceed as in the previous paragraph for linear direct reading sensors except set sensor range P2 to the actual range of the input sensor Function I O Dialog Box Inputs LEAD LAG This XFM controls two devices with lead lag logic XFM lead lag csd Ld D LdE l LdF Lg st C st2 Ld Lead Device 0 for first device 1 for second LdE Lead Device Enable 1 to Enable 0 to Disable LdF Lead Device Failure 0 is normal 1 is failed LgE Lag Device Enable 1 to Enable 0 to Disable St1 Device 1 Status 1 is On 0 is Off St2 Device 2 Status same as St1 57 74 5577 10
5. ALPHABETIC REFERENCE CARE CONTROL ICONS Closed Control Loops Continuous Controllers Reverse vs Direct Acting 74 5577 10 US EN2B 0184 GE51 R0404 Europe PID Operation A PID is generally part of a closed control loop Control is possible only in a closed control loop because the controller requires feedback from the controlled section with respect to changes in the positioning signal The following diagram illustrates closed control loop operation disturbance Z a actuator controlled section controlled variable X correcting controller variable Y reference variable W Disturbance is the changeable quantity that influences the controller for example an outdoor air temperature Controlled section refers to the part of the system where the controlled variable should be kept constant for example a heating circuit Actuator is the device in the system that the positioning signal repositions to maintain the setpoint An example of such a device is a mixing damper The PID in CARE applies to continuous controllers only Continuous controllers can assume any desired intermediate value between a minimum yMIN and a maximum yMAX for its positioning signal Controllers can also be classified as direct acting and reverse acting The output of a direct acting controller goes lower as the sensed value becomes smaller The output of a reverse acting controll
6. D__Rotating_P1 IA__Off_Index_P2 D__Rotating_P2 IA__Off_Index_P3 D__Rotating_P3 IA_On_Index_P1 A__Off_Index_P1 IA On Index P2 A__Off_Index_P2 IA On Index P3 A__Off_Index_P3 ID__Off_Prio_1 1A__On_Index_P1 ID__ Off_Prio_2 1A___On_Index_P2 ID Off Prio_3 IA__On_Index_P3 ID__On Prio 1 _Off_Prio_1 ID__On Prio_2 _Off_Prio_2 ID__On Prio_3 _Off_Prio_3 ___On_Prio_1 __On_Prio_2 __On_Prio_3 __ Peak_Load ___ Peak_Load __ Peak_Load ID___ Shutdown ID___ Shutdown ID___ Shutdown 74 5577 10 US EN2B 0184 GE51 R0404 Europe XFM 36 1 XFM 36 1 XFM 36 1 Po Po Po Po Po Po St RM St RM St RM IA__Off_Index_P1 D__Rotating_P1 IA__Off_Index_p2 D__Rotating_P2 IA__Off_Index_P3 D__Rotating_P3 IA__On_Index_P1 A__Off_Index_P1 1A__On_Index_P2 A__Off_Index_P2 IA_On_Index_P3 A__Off_Index_P3 ID__Off_Prio_1 1A__On_Index_P1 ID__ Off_Prio_2 1A___On_Index_P2 ID__Off_Prio_ 3 IA__On_Index_P3 ID__On_Prio_1 _Off_Prio_1 ID__On Prio_2 _Off_Prio_2 ID__On_Prio_3 _Off_Prio_3 __On_Prio_1 __On_Prio_2 __On_Prio_3 ___ Peak_Load __ Peak_Load __ Peak_Load ID___ Shutdown ID___ Shutdown ID___ Shutdown C8015 66 CARE CONTROL ICONS ALPHABETIC REFERENCE The following diagram shows an example of how datapoint ID___ On_Prio_2 exchanges data between the XFMs XFM 35 Po1 SWITCH POWER TOTALIZER Zi Po2 SWITCH POWER SYNC PULSE SYC Po3 SWITCH POWER SWITCH POWER Po1 IA___Energy_Intv SWTICH PO
7. Honeywell Excel CARE Control Icons USER GUIDE 74 5577 10 US Europe 74 5577 10 US Copyright 2004 Honeywell Inc All Rights Reserved EN2B 0184 GE51 R0404 Europe Excel CARE Control Icons Software License Advisory USER GUIDE This document supports software that is proprietary to Honeywell Inc and or to third party software vendors Before software delivery the end user must execute a software license agreement that governs software use Software license agreement provisions include limiting use of the software to equipment furnished limiting copying preserving confidentiality and prohibiting transfer to a third party Disclosure use or reproduction beyond that permitted in the license agreement is prohibited 74 5577 10 US EN2B 0184 GE51 R0404 Europe 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS CONTENTS INTRODUCTION aan aan e aaa a AE vine Ea Saaana Seessdates dsseueevaveeucevuncestucaseses 1 Applicable Literae ra a e eE aaa eae 1 Control Icon Operation issiria uenee ika iadd 2 Control ICON Table rritin tia na re iiinn kinnina iata iaei 3 ALPHABETIC REFERENCE ile E oe tas Se ee acre A aaeee 7 Ad ADD chives cctiecgst esi Coed thao lis Mrevisec huatexcchey Sos E AEE 8 Analog Switch SWI eeesceeesseeeeeeeeeeeneeeceeeeeesnneeeeesaeeeseeeaeeesneeeesenaeeeenenaeees 9 Average AVR E eet haunt Sided E E E E E E S 10 Cascade CAS n ech cha ee en ei een
8. Pointin Alarm __ dg XTX Suppress Alarm dg X x x x x XX Trend Cycle ana X X X X Trend Threshold an x J x X X X X X X X X No Response dg Xx DIO Remote dig Referred to as Access Control for Flex Points Operational status can be 1 for manual or O for automatic x lt Hide Poit dg x x X Read access Al Analog input PAI Analog input pseudopoint VA AO Analog output PTOT Totalizer pseudopoint VT DI Digital input PDI Digital input pseudopoint VD DO Digital output 3POS Three position analog output GA Global analog GD Global digital TOT Totalizer fast or slow Flex Flex digital output with feedback multi staged and pulse_2 RIA Example See the Operating Pump Switchover application in the Examples chapter for a description of how to use RIA to switch pump operation between two pumps dependent on hours of operation 159 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Sequence SEQ An Function Sequence from one to three analog outputs dependent on an analog input The SEQ operator divides a controller signal into up to three output signals 1 0 Dialog Box Sequenced output Input One analog input X Outputs One to three analog outputs Y1 through Y3 Internal Parameters The internal parameters dialog box allows you to set the three output signals Y1 through Y3
9. Submodule Parameters enth csd Ed Index Parameter VYalue Mapped SW Point Unit New Value Fahrenheit enable Atmos pressure Btu divisor Humid ratio div Btu offset Set Parameter P1 1 to enable Fahrenheit temperature Set P1 0 for Celsius Parameter P2 is atmospheric pressure in millibars Sea level pressure 14 7 psi 1013 millibars Adjust for higher altitudes P3 2 326 Divide into kJ kg to get BTU Ib P4 1000 Divide into g kg to get Ib Ib humidity ratio Set to 0 143 to get grains Ib P5 7 7 BTU conversion offset Add to BTU Ib to get enthalpy 51 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS ENHANCED PID EPID Function Standard PID function with additional features such as built in start up ramp direct reverse action selection integral recalculation to prevent windup below minimum above maximum and an auxiliary input for limit applications and integral reset The following diagram compares the system response characteristics of the PID versus the EPID SP SP gene PID EPID START UP RAMP t t TIME TIME I O Dialog Box FH epid csd nog d ee Oe e Inputs Inp input value SPt setpoint Ena enable SRT start ramp time OSV output start value Aux auxiliary input When the enable input Ena is turned on the EPID output starts at the desired output start value OSV and changes slowly as needed to bring the controlled variable Inp to its set
10. o i P1_difference P2_difference status_P2 status_P1 status_P2 y2 Lioo i status_P1 1 Switchover occurs every 100 hours The switching tables save the time period for status P1 and status P2 Y1 and Y2 are MAT formulas that work together to operate the switching tables Y1 run hours P1 P1_ Difference Y2 run hours P2 P2_ Difference The control loop and switching tables use flags for the hours and statuses since these values are of no interest to a user at an operator s terminal 195 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS Optimized Start Stop Purpose Control Icons Description 74 5577 10 US EN2B 0184 GE51 R0404 Europe This application optimizes the start stop of an air conditioning system Systems should start at the latest possible time and should stop as soon as possible to save energy Use the EOV SWI MAT and ZEB control icons The following diagram shows the application in CARE plant switch on command EOV plant ON XxX K room setpoint amp X room temp x K E x outdoor temp upper_setpoint heating cooling x Mal heating_cooling 1 YD2_EOV 1 program for 1 heating cooling ower setpoint decision heating_cooling 0 heating 1 cooling 0 YD2_EOV 1 e g ZEB sw1 K room swi room s EJF setpoint m KIEL setpoint 5K X 5K t corr room setpoint room setpoi
11. 10 OFF time 0 Output If the ON time is set to 0 a single negative pulse is generated Input On time 0 OFF time 10 Output If the input is removed mid cycle the output continues to complete that cycle Cycle Trend Example In many cases trend logs include points whose values change frequently Over a lengthy time interval these frequent variations in signal exhaust the capacity of the trend buffer See the Examples chapter for details on the use of the CYC icon in controlling output to the trend log Trend Buffer Control example The Examples chapter also describes an average value calculation that uses the CYC icon 23 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Data Transfer IDT Function I O Dialog Box Input Output Output Conversion Internal Parameters 74 5577 10 US EN2B 0184 GE51 R0404 Europe Transfer a value from one control icon to other icons or points O y3 oT x oO One input required Any input point type or control icon can be an input One to five outputs one required Outputs can connect to any output point analog or digital physical or pseudo or to the input of other control icons except another IDT An IDT cannot be an input to another IDT The first output type determines all other output types For example if the first output connects to an analog point all other outputs must connect to an anal
12. 112 CARE CONTROL ICONS ALPHABETIC REFERENCE Minimum MIN Function I O Dialog Box Inputs Output Internal Parameters Parameter Number Descriptions Example Output the lowest valueamong two through six analog inputs For example in control technology continuous positioning signals are often calculated using mathematical functions These functions are defined for the entire set of real numbers while positioning signals are typically valid only for a subset of numbers for example 0 to 100 percent You can use the MIN iconto define the maximum output value to a signal If for example a function outputs a value above 100 you can use MIN to select either the function output or 100 whichever is lower Min lowest input oo 0 x2 O x3 O xa O x5 O x6 L Two through six analog inputs X1 through X6 Minimum two inputs You can enter the first input as a parameter engineering unit index number and value One analog output Y None None See Positioning Signal Limitation in the Examples chapter for an application that uses the MIN and MAX icons to limit an output signal Also see the Duty Cycle DUC section You can use MIN to calculate an input value for lowest zone temperature 113 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Night Purge NIPU Function I O Dialog Box Example 74 5577 10 US EN2B 0184 GE51 R040
13. 74 5577 10 US EN2B 0184 GE51 R0404 Europe Eco Decide on the most economical system operation for full and partial air conditioning systems For a full air conditioning plant it calculates the control signal Y output for energy recovery on the basis of actual outdoor air enthalpy return air enthalpy and demand In partial air conditioning systems you can use this control icon for heat recovery with temperature comparison ECO makes decisionsbased on the following information e Is the system a full or partial air conditioning system A full system has temperature and humidity control A partial system has temperature control only e Is there mixed air damper operation or heat and humidity recovery using a thermal wheel e Which has the higher energy cost heating or cooling Four analog inputs X1 through X4 where X1 Temperature controller 58F through 122F 50C through 50C for example the output of a PID that controls basic temperature X2 Humidity controller 50 through 50 percent rh for example the output of a PID that controls humidity This input is optional X3 Outdoor air enthalpy temperature X4 Return air enthalpy temperature X1 and X2 expects these inputs from direct acting controllers that is controllers that react to a deviation with a change of the positioning signal in the same direction X3 and X4 must be the same type of input either both temperature or both enthalpy
14. Load Number User address IA___ On_Index_P1 2 3 contains the rank of the load that was the last load ON For example if IA___On_Index_P3 is equal to 6 there are six loads that are ON in Group 3 Loads are turned ON starting with Load Number 1 The second XFM 36 1 S input RM and the general functions within this XFM make the final decision to switch on the load The next load to switch on is the XFM 36 1 S with its Parameter P14 equal to 7 The next load to switch off in this example is the one with P14 equal to 5 User address IA___Off_Index_P1 2 3 has no function in sequential load switching and therefore is not used The criteria for sequential switching ON a load are as follows The XFM 36 1 S is in automatic operating mode Parameter P13 0 e Parameter P15 16 17 in XFM 35 is 0 and the corresponding user address ID_ Rotating_P1 2 3 is 0 ID___ Rotating_P1 P2 P3 is not required for groups with XFM 3618S The power value at the first input Po is positive and equal to or greater than the load power Parameter P15 of the XFM 36 1 S The value of the user address IA On_Index_P1 2 3 is equal to the XFM 36 1 S load number set in P14 minus 1 for example XFM 36 1 S is in the first priority group the value of IA On_Index_P11 is 7 and the load number Parameter P14 is 8 The minimum OFF time Parameter P11 of the XFM 36 1 S has expired e If Parameter P16 of the XFM 36 1 is 1 S input RM must also equal 1 see the RM Function
15. O RM Po XFM 36 1R O Po Po XFM 36 1 O Po St No 2 O RM St No 2 O R Po XFM 36 1R O Po Po XFM 36 1 O Po St No 50 4 RM St No 50 O RM Group Group 2 3 Po XFM 36 1 O Po St No 1 O RM Group RM 1 1 The principle of operation is that XFM 35 implements the desired algorithm and then outputs the actual kW shed restore values to the XFM 36 1 S Rs A positive kW value is a command to restore loads totaling that much kW A negative kW value is a command to shed loads of that much kW The kW shed restore values can appear at output Po1 Po2 or Po3 Po is the output for priority group 1 It has the lowest priority and is shed first Po2 loads are shed next and Po3 loads are shed last Each sheddable load is controlled by an XFM 36 1 S R The XFM 36 1 S Rs are connected in the CARE control strategy in a series string For priority group 1 for example XFM 35 output Po1 is connected to the Po input of the first XFM 36 1 S R The Po output of the first XFM 36 1 S R is then connected to the Po output of the second XFM 36 1 S R The Po output of the second XFM 36 1 S R is then connected to the Po input of the third XFM 36 1 S R Up to 50 XFM 36 1s can be connected in a string this manner To complete priority group 1 the Po output of the last XFM 36 1 S R must be connected to the Po1 input of XFM 35 The XFM 36 1 S Rs for priority groups 2 and 3 are connected similarly to XFM 35 Po2 and Po3 inputs and outputs In
16. US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Outputs Internal Parameters CARE CONTROL ICONS The lead enable input point LdE is a connection to a digital signal calling for start up of the lead device A value of 1 turns the lead device on A value of 0 turns it off The lag enable input point LgE is a similar connection for turning on and off the lag device The connection should be made from an operator calling for the lag device to be either on or off Ss1 Device 1 Start Stop Ss2 Device 2 Start Stop LdF Lead Device Failure The point LdF indicates lead device failure It is meant to be passed back into this submodule or put through some other logic then passed back into the submodule If the devices being controlled by this submodule are stand alone or are meant to be backed up individually you can pass the output LdF directly to the input LdF through a VD point If the devices are part of a system which is to fail if any component in the system fails there will be several module calls to the submodule and you will need to look at all of these LdF points and create one new VD point to pass back into the appropriate submodules When the LdE point is turned on the lead device is started and a timer delay is initiated Time is set at Parameter P1 If any time after this time expires the lead device status is not true the LdF point turns on If the Ld point is changed while the LdE is on the LdF is reset to False
17. User address displays in the dialog box 3 Enter a1 through a5 values in the editing fields 4 Click OK Or to close the dialog box without saving click Cancel RESULT If you click OK the mathematical editor dialog box displays with the formula Example POL RET_AIR_TEMP 54 Li 5 5 Click OK to accept the formula and close the dialog box 6 Ifin the Control Strategy connect the MAT icon to the appropriate icon See the Connection of the MAT Icon to a Control Icon procedure for details Parameter Number Descriptions P3 Coefficient a1 P4 Coefficient a2 P5 Coefficient a3 P6 Coefficient a4 P7 Coefficient a5 Connection of the MAT Icon to a Control Icon 1 Click on the icon in the Control strategy work space to which the MAT icon should connect RESULT The dialog box for the icon displays 2 Click the analog input into which the MAT icon should connect RESULT A check mark appears in the check box 3 Select the MAT icon in the Control strategy work space RESULT The MAT dialog box displays 4 Click the Y check box to select the output RESULT A check mark appears in the check box 5 Click the red icon symbol in the icon dialog box on the left RESULT Both dialog boxes close Both icons turn dark blue 6 Complete the connection between both icons in the usual way 74 5577 10 US 110 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE RESULT The MAT control st
18. calculate supply setpoint EOH with EOH statement setback active and outdoor temp lt 36F 2C set final setpoint to set final setpoint to supply setpoint from supply setpoint from frost protection funct EOH The following diagram shows another example of EOH use PI Flow setpoint EQH Y1 X1 Room temperature sensor Actuator YD2 X2 Outdoor air temperature sensor YD3 X3 Room temperature setpoint Flow sensor Use in displays switching logic trend log At optimum start YD2 goes to logic 1 and returns to logic 0 at occupancy start time At optimum stop YD3 goes to logic 1 and remains at this value until optimum start occurs next day or later 128 CARE CONTROL ICONS Optimum Start without a Room Sensor Optimum Start with a Room Sensor Optimum Start with Adaptation ALPHABETIC REFERENCE The following diagram illustrates the calculation of an ON time based on an outdoor air temperature preheat time at 32F OC characteristic Time 50 OAT EOH calculates a discharge air setpoint based on the selected outdoor air temperature discharge air OAT DA schedule default is 1 6 plus the effect of P8 parallel shift and the time program room setpoint it must achieve During this optimized ON period the discharge air setpoint varies with the OAT P5 determines maximum discharge air setpoint If the load on the system was so great that even an occupancy start time minus P8 and a maximum discharge air
19. degree This value can be automatically adjusted if the adaptation option is enabled P9 Units Deg Default 75 Range 60 to 100 Maximum outside air temperature for optimum stop When outside air temperature is at or above this value the stop time will not be advanced in cooling mode P10 Units Min F Deg Default 10 Range 0 to 100 Optimum stop factor For optimum stop during cooling this value sets the amount of influence that the difference between room temperature and its setpoint has on advancing or retarding the optimum stop calculation The base stop time is 120 minutes before the schedule stop time For every degree that the room temperature is above setpoint the base stop time will be decreased by the value of this parameter For every degree that the room temperature is belowsetpoint the base setpoint will be increased by the value of this parameter Set to 0 to make optimum stop during cooling solely dependent on outside air temperature Enable disable or new start enable options P3 Lowest preheat time for optimized preheat P4 High speed preheat factor time required for X3 to rise 1K P5 Optimum stop OAT low limit for optimized shutdown heating P6 Optimum stop factor heating P7 Lowest cooling time for optimized cooling P8 High speed cooling factor time required for X3 to decrease 1K P9 Maximum OAT for optimized shutdown cooling P10 Optimum stop factor cooling P11 Factor adaptation for adapting P4 and P8 0
20. i is 4220 10 or 422 The formula to average three days of OAT oat_72h is then oat_72h n oat_72h OAT n 1 where n varies from 0 through 422 and increases by 1 every 10 minutes The following flowchart illustrates this averaging 182 CARE CONTROL ICONS EXAMPLES create pulse with 10 minutes pulse perlod read cycle oat_72h n oat_72h outdoor air temp oat_72h oat_72h n 1 1 n gt i average calculaton limit reached n i weight factor remains unchanged Control Icons Use the SWI CYC MAT and EVC icons 183 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES Control Sequence 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS The following diagram illustrates the control sequence in CARE outdoor air temperature MAT average n oat_72h outdoor air temp n 1 oazn tnt YT The CYC statement generates a series of impulses with a period duration of 10 minutes scan time To do this the CYC icon must have the following parameter assignments Switch on time 599 sec Switch off time 1 sec NOTE To guarantee correct operation switch on time must equal cycle time This rule is the only way to ensure that the impulse is present during an entire cycle and is interpretable With a cycle time of 5 seconds switch on time must be 1 second and switch off time 599 seconds Impulses from CYC are
21. where X Controlled variable for example room temperature sensor W Reference variable also known as setpoint You can enter the reference variable W as a parameter engineering unit index number and value One digital input where XD Enable disable integral control action When XD is zero integral control is disabled and the integral sum is reset One analog output Y Proportional band Xp Derivate time TY o Sec Integral action time Tn 1000 Sec Minimum output oo Maximum output Cancel Number type decimal Unit same as the controlled variable X Default 3 0 Range 9999 0 through 9999 0 Proportional band value is equivalent to the throttling range NOTE Negative values will accomplish an opposite action on the output DO NOT use zero This does not apply to Derivative or Integral Number type whole number Unit seconds Default 0 sec Range 0 through 7200 sec 148 CARE CONTROL ICONS Integral action time Tn Minimum output Maximum output Parameter Number Descriptions ALPHABETIC REFERENCE Number type whole number Unit seconds Default 1000 sec Range 0 through 7200 sec If Integral action time is less than 15 seconds integral control is disabled Number type decimal Unit percent Default 0 0 percent Range 0 through 100 0 percent Minimum output must be less than Maximum output Number type decimal Unit percent Default 100 0 percent Range 0 thro
22. 0 through 20K Optimum stop outdoor air temperature low limit P7 Number type Decimal Unit Degrees Fahrenheit Default 32F OC Range 14 through 59F 10 through 15C Pre heat time at OC outdoor air temperature with room sensor Number type Whole number Unit Minutes Default 120 min Range 0 through 1440 min Optimum stop with room sensor P9 Number type Whole number Unit Minutes F Deg Default 20min F Deg Range 0 through 110 min F Deg Dead time 1 P10 Number type Whole number Unit Minutes Default 5 min Range 0 through 60 min Time constant 1 P11 Number type Whole number Unit Minutes Default 300 min Range 0 through 2880 min Dead time 2 P12 Number type Whole number Unit Minutes Default 5 min Range 0 through 60 min 74 5577 10 US 118 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Time constant 2 P13 Room control multiplier P15 Integral action time P16 Maximum permissible discharge air temperature P17 Heating curve curvature P18 Heating curve slope P19 Radio buttons Parameter Number Descriptions EOH Operating Procedures ALPHABETIC REFERENCE Number type Whole number Unit Minutes Default 600 min Range 0 through 2880 min Number type Decimal Unit Default 15 0 Range 0 through 100 0 Number type Decimal Unit Seconds Default 1000 0s Range 0 through 7200 0s Number type Decimal Unit Degrees Fahrenheit Default 175 0F 80 0K Range 32 0 through 302 0
23. 0 through 54 F Deg 30 0K DUC uses this value to calculate zone comfort limits around the setpoint X4 Number type Decimal Unit percent Default 50 0 percent Range 25 through 80 0 percent Select a Maximum off time for the output YD1 or YD2 for example a supply fan that guarantees an adequate air change minimum outdoor air rate per person This value refers to cycle duration Number type Decimal Unit percent Default 0 0 percent Range 5 through 50 0 percent Select a Minimum off time that prevents the fan motor from overheating This value refers to cycle duration Number type Whole number Unit Minutes Default 30 min Range 5 through 60 min Select a Cycle time that ensures that the fan motor does not switch on more often than the allowable number of times per hour The first three radio buttons determine the system type Heating Cooling or Heating and cooling The lower two radio buttons determine whether or not the system has a two speed fan P3 Comfort range P4 Maximum off time P5 Minimum off time P6 Cycle time P7 System type 1 heating 2 cooling 3 heating and cooling 31 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE NIPU and DUC Operation No Fixed Off Times Off Time Calculation 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS P8 Fan type 1 Two speed fan 0 Single speed fan P9 Highest zone temperature P10 Lowest zone tempera
24. 1 only after a delay of 20 seconds Until then the condition of this line STARTUP 0 is true After 20 seconds the table senses STARTUP 1 and the condition is false The table sets STARTUP to zero Note that you do not use a switching table with a zero output because zero switching tables do not automatically toggle between 1 and 0 In other words zero switching tables do not generate a one when they become false CAUTION Delay time Te must be larger than the maximum cycle time This action guarantees that a DDC cycle is done before STARTUP switches to zero Only then can other switching tables evaluate the negative cycle Line 3 of the table provides a self latching function If STARTUP was previously equal to 1 it sets STARTUP to 1 again If STARTUP was previously equal to zero it sets STARTUP to zero again In effect STARTUP does not change immediately to 74 5577 10 US 214 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Upper Left Switching Table APPENDIX B STARTUP USER ADDRESS 1 again when the switch on delay expires for the first time It remains zero only the controller can still activate STARTUP The first ventilator stage switches on according to the table at the upper left of the previous diagram anster ao fanstage2 Taeaos_ 0 0 ftimeprog staget 1 0 jtimeprog stage 2 4 startup Ta sos 0 0 The first stage switches on when The second ventilator stag
25. 3 ALPHABETIC REFERENCE XFM 35 General Functions The strategy for the maximum load optimization program XFM 35 includes general functions to provide stability special features and power control alarms These functions have a high priority in making the final decisions about load switching Functions include Shed Restore value limitation Start up after a power failure Ideal Curve and Extrapolation only Parameter modification at run time Freeze time function Ideal Curve and Extrapolation only Switch on wait time Power limit setpoint switchover Switching behavior of loads in a priority group Sequential or rotational Synchronization pulse loss Manual load shed required message Peak load notification Ideal Curve and Extrapolation only Shutdown of loads Ideal Curve and Extrapolation only Totalizer input reset Counter_Zi The selected algorithm calculates a power value to be switched by the loads Parameter P5 maximum switch on power value limits this power value To avoid frequent cycling of loads software does not transmit power values near zero to the XFM 36 1 loads A hysteresis parameter P7 creates a deadband between P7 and P7 A calculated power value within the deadband P7 and P7 sets the XFM 35 output Po1 2 3 to zero Outside the interval the switch on values are limited by P5 and then transmitted to Po1 2 3 The following table lists the parameters used for the limitation of the power value Par
26. 3 Enter the limit Lim and reset time Ti values in the editing fields 104 CARE CONTROL ICONS ALPHABETIC REFERENCE 4 Click desired engineering unit seconds or minutes 5 Click OK to close the dialog box and save the formula Or to close the dialog box without saving click Cancel RESULT If you clicked OK the mathematical editor dialog box displays with the formula Example Math Editor New Variable INRT OA_TEMP 3 4S 6 Click OK to accept the formula and close the dialog box 7 Ifin the Control Strategy connect the MAT icon to the appropriate icon See the Connection of the MAT Icon to a Control Icon procedure for details Example See the Examples chapter of this manual for a description of the use of the INT function in an Attenuator application Parameter Number Descriptions P3 Integral action time Ti P4 Limitation Lim 105 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Differential Function DIFT Dialog Box Purpose Calculate a differential output signal that varies proportionally to change in the input signal Formula DIFT Td t0 x t x t t0 Where Td is the proportional constant x is a user address representing the deviation x t is the actual value of user address x x t t0 is the value of the user address x in the previous cycle User address x can be a physical point pseudopoint or flag Procedure 1 Click DIFT RESULT The
27. 47 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Event Counter EVC Function I O Dialog Box Inputs Output Internal Parameters Example 74 5577 10 US EN2B 0184 GE51 R0404 Europe L Register counted values Event counter Two digital inputs XD1 and XD2 where XD1 Event input XD2 Reset One analog output Y Counter value within the limits of O to 1037 The EVC function adds 1 to the counter value Y when an input XD1 receives a positive pulse transition from zero to 1 Software resets the counter when XD2 assumes a value of at least 1 If both conditions occur at the same time software resets the counter None See the Examples chapter for a description of the use of EVC in the Average Value Calculation 48 CARE CONTROL ICONS ALPHABETIC REFERENCE Fixed Applications XFM Function Dialog Box Subprogram List enth csd epid csd flow csd lead lag csd ramp csd Extended Function Modules XFMs are applications or subprograms that can combine with other control icons subprograms or points to provide additional control strategy functionality When you select and place the XFM icon from the Control Strategy tool bar the Load submodules dialog box displays with a list of subprograms from the XFM library Load Submodules Submodules ahcca0la csd ahcsa0la csd ahcsa02a csd ahcsb
28. 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS value to reach the ideal curve in Zg Zg the desired measurement value of power at the end of the measurement interval Second XFM 35 input Syc Measurement Interval P10 1 0 0 1 2 3 4 5 6 7 8 9 10 11 Time Counter Value delta Z Zd Zd P13 or P14 P6 P10 ZO wee delta T Power limit Z7 delta Z delta T Z6 ZO 0 1 2 3 4 5 6 7 8 9 10 11 Time Select the Ideal Curve algorithm by setting Parameter P9 to the value 2 A safety margin parameter P6 provides a secure margin between the current power peak Parameter P1 and the possible power Parameter P4 The algorithm uses an offset factor P18 to amplify the power setpoint possible power that displays in Parameter P4 at the beginning of every measurement interval The effect of the offset factor lessens as time passes and disappears by the end of the measurement interval The internal user address IA__Energy_lntv indicates the current energy consumed equal to Z7 Zp in the previous diagram during the measurement interval The General Functions subsection explains the other internal user addresses and parameters used in this algorithm The following table lists the Ideal Curve algorithm parameters EE m meee E ET Number Type Brief Description Range Value C Display Remaining Wok rome none wn Display Possible Power with constant Power none none kW Consumption
29. Comm Measurement Algorithm 1 2 3 3 Integer or wane a 1 Power Limit 2 0 106 10000 Offset Factor a just for Ideal Curve Algorithm 0 1000 o Integer Extrapolation Algorithm The Extrapolation algorithm measures the increase in energy consumption and calculates the power to be switched within a fixed measurement interval Parameter P10 This algorithm is used mainly in Europe Two synchronization pulses received XFM 35 s second input Syc determine the start and finish of the measurement interval A local electricity company provides the 74 5577 10 US 76 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE synchronization pulses An agreement with an electricity company about energy consumption determines that consumed energy in a time interval measurement interval Parameter P10 shall not exceed a limit value that is the product of power limit P13 or P14 and P10 60 in hours The Extrapolation algorithm uses three measurement points to calculate the power to be switched by the loads The following diagram shows the power value at the 7th sample in the measurement interval as a desired slope to reach the energy limit Zg The algorithm uses work values Zp Zg and Z7 to calculate desired slope Second XFM 35 input Syc Measurement Interval P10 1 Oo 1 2 3 4 5 6 7 8 9 10 11 Time Zd vu Power result of Extrapolation 27 desired slope Z6 ZO 0 1 2 3 4 5 6 7 8 9 10 11 Time Select the
30. Extrapolation algorithm by setting Parameter P9 to the value 3 A safety margin parameter P6 provides a secure margin between the current power peak Parameter P1 and the possible power Parameter P4 The internal user address IA___ Energy_Intv indicates current energy consumed equal to Z7 Zp in the previous diagram during the measurement interval The General Functions subsection explains the other internal user addresses and parameters used in this algorithm The following table lists parameters used for the extrapolation algorithm Parameter Setting Default Number Type Brief Description Range Value Display Current Power Consumption Display Remaining Rest Time min Display Remaining Work min Display Possible Power with constant none none kW Power Consumption kW comm Seymen owo o Comm Measurement Algorithm 1 2 3 3 Integer o ee e a Measurement Interval Window Size a 77 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Switching On XFM 36 1 Loads Switching Off XFM 36 1 Loads 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Priority Groups and their Switching Behavior After the selected algorithm calculates the power to be switched software must distribute the power value to the XFM 36 1 S R load control programs XFM 35 determines the priority group 1 2 or 3 to receive the calculated power value Priority group 3 has the highest priority las
31. New start or Enable for the Factor Adaption field in the internal parameters dialog box EOV adapts the factors with decreasing weighting that is the new factors calculated after the first optimization may change P4 P8 significantly the factors calculated after the second optimization somewhat less and so on After the first successful optimization EOV sets Parameter P11 to zero This setting corresponds to Adaption enable You can prevent or interrupt adaptation by setting the Adaption button to disable P11 1 When preparing the Time Program set the switching points for system start stop to the latest possible time because EOV automatically advances these times if necessary 138 CARE CONTROL ICONS Time Program Switch Point Time Program Optimization No Setpoint or Integrated Controller ALPHABETIC REFERENCE Also you must set the Optimization variable to Yes in the Time Program for system start stop With EOV the Time Program does not use step changes in the room temperature setpoint for optimized system start stop as is the case with EOH Instead the Time Program includes XD1 status changes in the calculation of optimized start stop time points Therefore XD1 must be a Time Program user address This requirement is the only way advance monitoring of the switch point is possible EOV releases the optimization attribute in the Time Program that has the user address assigned to XD1 This release enables optional system
32. Number Descriptions P Controller 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Number type whole number Unit seconds Default 1000 sec Range 0 through 7200 sec If Integral action time is less than 15 seconds integral control is disabled If you set Integral action time to zero software sets the P2 parameter to 1 000 000 A number this large effectively disables the integral term Number type decimal Unit percent Default 0 0 percent Range 0 through 100 0 percent Minimum output must be less than Maximum output Number type decimal Unit percent Default 100 0 percent Range 0 through 100 0 percent P or PI Controller P3 Proportional band Xp P4 Integral action time Tn in seconds If you set Integral action time to zero in the internal parameters dialog box software sets the P4 parameter to 1 000 000 A number this large effectively disables the integral term P5 Minimum output in percent P6 Maximum output in percent P7 Reference variable W if entered as a parameter not connected to a point PD Controller P3 Proportional band Xp P4 Derivative time Tv in seconds P5 Minimum output in percent P6 Maximum output in percent P7 Reference variable W if entered as a parameter not connected to a point PID Controller P3 Proportional band Xp P4 Derivative time Tv in seconds P5 Integral action time Tn in seconds If you set Integral action time to zero in the inte
33. TF26 temperature selector is represented by the point ess The MAT icons incorporate the formulas for the Auto and Day modes of operation The auto formula supplies the correction signal that must be added to the setpoint of Time Program to generate the corrected setpoint The day formula supplies the correction signal that must be added to the constant day setpoint 20C 68F to generate the corrected setpoint However the formulas cannot be used as is because the mathematical editor does not permit two operations in direct succession in this example 8 where the equals sign is followed by the minus sign To create acceptable formulas the formulas are multiplied by 1 and subtracted from the particular setpoint In auto operation the corrected setpoint is equal to the Time Program setpoint minus the result of the auto formula Mathematically Corrected setpoint Setpoint hour 8 TW 7 39 12 for TW gt 4 25V In manual operation the corrected setpoint is equal to the constant setpoint minus the result of the day formula Mathematically Corrected setpoint 20 8 TW 3 99 12 for TW lt 4 25V The DIF statements subtract the day and auto results from the appropriate setpoints 201 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES TW Linear Characteristic 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Auto day operation switchover is via a switching table comparison If input vo
34. X1582 Excel Building Supervisor Operator Manual 74 2039 describes the manual value operating status alarm status auto value and hours run attributes for the related point types See Excel X1581 X1582 Operator Terminals Operator Manual 74 3554 US EN2B 0126 Europe for trend logging information NOTE The list of attributes presented in the icon change depending on the type of connection For example if the output is connected to a digital type connection if it is a point or another icon then the list of available attributes consists of only the ones marked dig in this this table The same type of list is available when an analog type connection is made only the ana are available A special condition exists when the attribute Manual Value is selected The available list only consists of Manual Value and No Attribute 170 CARE CONTROL ICONS ALPHABETIC REFERENCE dig ana AI PAI DI PDI AO PO DO 3POS GA GD TOT FLEX Accumulated Runtime ana X Alarm Hysterisis ana X Alarm Status dig X Auto Value ana X Cycle Count ana Global Broadcast Threshold ana X High Alarm Limit ana X High Warning Limit ana X Low Alarm Limit ana X Low Warning Limit ana X Manual Value ana X X X X X X X X No Attribute ana X X X X X X X X Operational Mode dig X X X X X X X X Operator Access Level ana X X X X X X X X Suppress Alarm dig X X X X X X Trend Cycle ana X X X X X Trend Loggiing
35. a digital output YD connects to a program that controls dampers and the fresh air ventilator This program opens the dampers to 100 percent and switches on the ventilator with a high signal from NIPU This action results in 100 percent outdoor air purging The following diagram illustrates CARE programming 115 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS room temp outdoor temp enable NIPU setpoint shift room setpoint The digital pseudopoint VD called Enable NIPU is set by the Time Program in the controller The Time Program must set it to 1 in the evening for night cooling on and to zero in the morning night cooling off Because the NIPU has no built in hysteresis an independent program for ventilator control through switch on delay using switching tables for example must perform this function 74 5577 10 US 116 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Optimum Start Stop EOH Function Adapted Heating Curve I O Dialog Box Inputs Outputs EOH Calculate optimized values for starting and stopping the heating plant The EOH functiontakes into account the residual heat in a building to avoid unnecessary heating operation and thus save energy Required room conditions are met at all times EOH calculates required flow temperature with an integrated heating curve Two techniques are available optimization wi
36. air conditioning system only temperature control this module just sends the YT signal from Module 4 to output Y 45 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS The following diagrams illustrate table output MIN and MAX for temperature and humidity MAX Temperature Controller hAL gt hAbL and MAX Humidity Controller hAL gt hAbL working range of 4 heating pl Eco IE cooling I 0 0 35 50 65 100 MIN Temperature Controller hAL lt hAbL and MIN Humidity Controller hAL lt hAbL working range of W heating IE Eco WE cooling 0 0 35 50 65 100 74 5577 10 US 46 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE ECO Example The following diagram illustrates the use of the ECO control icon in a complete control loop heat recovery dehumidify humidify cooling heating temperature controller xE supply air sp x supply air we actual value humidity controller supply air sp XW x supply air wA actual value outdoor temp outdoor air J outdoor humid enthalpy exhaust air Bi exhaust temp enthalpy K exhaust humid Note that the control loop must reverse the outputs from the temperature and humidity controllers before they connect to the ECO icon The PID controllers reverse the outputs with the reversed connection of the controlled and reference variable
37. algorithm by setting Parameter P9 to the value 1 The following table lists the Sliding Window algorithm parameters Parameter Setting Default Number Type Brief Description Range Value Display Current Power Consumption none none kw 4 Display Possible Power with constant none none kW Power Consumption Comm Measurement Algorithm 1 2 0r3 3 Integer on me g Comm Safety Margin 0 1000 kW 6 Comm SafetyMargin o o w 0 14 Power Limit 2 0 106 10000 Ideal Curve Algorithm Refer to the General Functions subsection for more parameter details The Ideal Curve algorithm measures the increasing work and calculates the power to be switched within a fixed measurement interval Parameter P10 This algorithm is used mainly in Europe Two synchronization pulses received at XFM 35 s second input Syc determine the start and finish of the measurement interval The local electric company provides the synchronization pulses An agreement with the electric company about energy consumption determines that consumed energy in a time interval measurement interval Parameter P10 shall not exceed a limit value that is the product of power limit P13 or P14 and P10 60 in hours The following diagram shows measured power over runtime The Ideal Curve algorithm plots energy consumption along the power limit slope Ideal Curve The algorithm uses three measured values Zp Zg and Z7 to calculate the power 15 74
38. any group the sequential load with the highest load number parameter 14 is shed first 63 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS In basic system operation XFM 35 outputs 0 kW to Po1 2 or 3 if no loads are to be shed or restored However if for example 500 kW must be shed in a system where all loads are ON 500 kW will be output from XFM 35 PO1 The first XFM 36 1 S R will shed its load of for example 150 kW and the remaining kW 350 is output to the PO input of the second XFM 36 1 S R The process continues until a total of 500 kW is shed or the remaining kW to be shed value is output into the XFM 35 PO1 input XFM 35 then outputs that value to its PO2 output and the priority group 2 XFM 36 1 S Rs shed their loads as explained above If necessary the process continues through the priority 3 loads The order in which loads are shed within a group depends primarily on whether a sequential or rotational strategy exists for that group Refer to the XFM 36 1 S R section for more detail For load restoration XFM 35 outputs positive values up to the value set by parameter five every 1 10th of the interval set by parameter 10 Priority group 3 loads are restored first if they are available for restoration followed by loads in priority groups 2 and 1 For any priority group Shed Restore action is either sequential or rotational based on
39. as the value of OB2 The input and output bound values can be either inputs or parameters These bound values can be positive or negative and there is no requirement that any bound be greater than or less than any other bound The following diagram compares bounded and unbounded Ratio outputs OB BOUNDED UNBOUNDED OUTPUT OUTPUT OB1 IB1 IB2 IB1 IB2 INPUT INPUT 60 CARE CONTROL ICONS Internal Parameters ALPHABETIC REFERENCE Submodule Parameters ratio csd X Index Parameter VYalue Mapped SW Point Unit New Value Unbounded Enable 0 000 New Unit 0 gt Unmap Modify Cancel Set Parameter 1 to 0 for bounded output Set Parameter 1 to 1 for unbounded output If OB1 and OB2 are set to the same value then the output will equal this value If IB1 and IB2 are set to the same value then the output will equal OB2 Function I O Dialog Box Inputs Totalizer XFM The totalizer module 1 Displays and outputs current hourly and daily energy usage 2 Stores displays and outputs past hourly daily and monthly energy usage 3 Displays total energy usage from program start up and current monthly usage Energy usage can include electrical current water gas or heat This function eliminates the need to connect an external frequency counter gesee LH CI Counter Input Totalizer input from controller The Counter Input requires one point without graphic of the fast totalizer ty
40. change first establish the desired Min and Max limits then divide the difference between these two limits by the desired rate of change to get the up or down ramp parameter values Submodule Parameters ramp csd x Index Parameter VYalue Mapped SW Point Unit New Value 300 000 Down_Ramp_time 300 000 pon onn Initialize_Mode 1 000 New Unit User_Initial_Value 0 000 Constant 1 000 Unmap Modify Info Cancel 59 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Function I O Dialog Box Inputs Outputs OB XFM OUTPUT OB1 74 5577 10 US EN2B 0184 GE51 R0404 Europe RATIO Perform a linear translation on a single input value from one scale to another As an input varies between two input bounds IB1 and IB2 vary an output between two output bounds OB1 and OB2 XFHM ratio csd OB2 output bound 2 IB2 input bound 2 Inp Input IB1 input bound 1 OB1 output bound 1 Out output As the input Inp varies between input bound 1 IB1 and input bound 2 IB2 the output Out varies between output bound 1 OB1 and output bound 2 OB2 respectively A parameter in the internal parameters dialog box Index 1 allows the selection of either a bounded or unbounded output When the input value is the same as IB1 the output value is the same as the value of OB1 When the input value is the same as IB2 the output value is the same
41. differential function dialog box displays DIFF Td tO x t xft t0 x RET_AIR_TEMP sec min 2 Select a user address for the x value function variable Use one of the following methods Td e Select a user address from the physical point bar in the Control strategy or Switching logic window e Type a user address name e Select a pseudopoint In the Control strategy function click the desired pseudopoint in the pseudopoint bar at the bottom of the window In the Switching logic function Click menu item Software points The list of pseudopoint types displays Click the analog type The Create select software point dialog box displays Click the desired point from the list Click OK The pseudopoint address displays in the formula Click End in the Create select software point dialog box to close it RESULT User address displays in the dialog box 3 Enter the value for Td in the editing field Td is a constant that the DIFT function uses to vary the output signal proportionally 4 Click the desired engineering unit seconds or minutes 5 Click OK Or to close the dialog box without saving click Cancel RESULT If you click OK the mathematical editor dialog box displays with the formula Example 74 5577 10 US 106 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS kJ Parameter Number Descriptions ALPHABETIC REFERENCE Math Editor New Variable S
42. discharge air temperature setpoint from the room temperature setpoint and outdoor air temperature Calculate enthalpy and absolute humidity Mathematical editor to modify inputs to other control icons Select the highest value among analog inputs 2 through 6 Select the lowest value among analog inputs 2 through 6 Use cold outdoor air during non working nighttime hours to precondition room space and save energy costs Calculate optimized values for starting and stopping heating system Calculate optimized values for starting and stopping air conditioning plants Proportional Integral Derivative controller that regulates an analog output based on two analog values one is a controlled variable the other a reference variable Same as previously defined PID with the addition of an integration time parameter Limit the variation in room temperature over time ramp function Read an attribute of a user address Sequence from one to three analog outputs dependent on an analog input Determine the difference between multiple analog input values 2 to 6 X1 X2 X3 X6 Write to an attribute of a user address Determine setpoints to maintain a predetermined comfort band divided into heating cooling and zero energy bands Datapoints are a technique of transferring information between XFMs when there are not enough of the regular inputs and outputs Datapoints are pseudopoints that can be wr
43. enable 1 disable 2 new start enable restarts adaptive calculations which overwrites previously gathered data and starts adapting P4 and P8 from scratch P12 Room temperature setpoint if X2 is not connected to a user address EOV works exclusively on the basis of the test room method that is a room sensor is required X3 is the input for the room sensor In addition EOV requires a room temperature setpoint X2 or a parameter input OAT sensor X4 and the user address for the Time Program switch point XD1 Optimized Start up in the Heating Mode When the system is in heating mode XD5 1 EOV displaces point switch on start up by time tyHE to guarantee room temperature setpoint is reached by start up The displacement of the switch on point depends on the difference between the room temperature setpoint and actual room temperature EOV assumes a linear room model 133 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS early switch on tyne minimum early switch on P3 X2 X3 room temperature gt The shortest advancement of start up is set by Parameter P3 lowest pre heat You must set this parameter to its lowest value so that the calculated start up point is valid The parameter s maximum limitation is 1080 min 18 hours The minimum limitation of advance time is 0 minutes When room temperature setpoint corresponds exactly to actual room temperature system
44. graphically In the following example the Y1 signal is selected radio button is filled in There is an empty box below Y1 This box is where the characteristic curve for the Y1 signal appears as you define the ranges for the Ya Yb Xa and Xb variables The arrows show which scroll bars apply to which parameters Use the following procedure to create characteristic curves for each desired Y output Y1 through Y3 Creating a Characteristic 1 Click New 2 Click the radio button for the desired Y output Y1 Y2 or Y3 3 Define Xa by clicking the left and right arrows in the scroll bar just below the X axis As you click the value of Xa changes You can also click the gray area in the scroll bar or click the white box thumb in the scroll bar and move it to the desired position Define Xb by clicking the lower scroll bar You can use the same techniques as for the other scroll bar The a and b parameters establish the characteristics left and right pivot points Xa must be less than Xb 74 5577 10 US 160 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Parameter Number Descriptions ALPHABETIC REFERENCE RESULT The values in the boxes to the left and right of the horizontal scroll bars change A line appears in the graph to represent the curve you created Tip gt If desired you can change the Xp value that appears above the New button The Xp value sets the maximum value for all
45. negative 3 Outdoor air temperature must be greater than the Minimum OAT value set in the internal parameters dialog box 4 Input XD3 must equal 1 night cooling is on 114 CARE CONTROL ICONS Internal Parameters Minimum outdoor air temperature Room Outdoor air minimum differential Parameter Number Descriptions NIPU and DUC Operation Night Purge Example ALPHABETIC REFERENCE The following diagram illustrates switching conditions room temperature outdoor air temperature output NIPU below maximum outdoor air temp setpoint shift below minimum switch hysteresis exceeded Minimum OAT F e Room OAT min differential cnet Number type Decimal Unit Degrees Fahrenheit Default 60F 15C Range 0 through 90F 25 through 30C This value is the minimum outdoor air temperature at which Night Purge continues to function If the outdoor air temperature drops below this value the supply of 100 percent outdoor air stops immediately Number type Decimal Unit F Deg Default 0 F Deg OK Range 0 through 36 F Deg 0 through 20K This value specifies how many degrees K the outdoor temperature must be lower than the room temperature so that Night Purge operation can begin P3 Minimum OAT P4 Room OAT minimum differential Using both NIPU and DUC in a system can result in command conflicts You should use switching tables to force NIPU to override DUC commands In this example
46. of the time program Two digital outputs one analog output minimum requirement where 117 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Y1 Discharge air temperature setpoint for the preheat or optimized off phases YD2 Goes to logic 1 returning to logic 0 at occupation start time YD3 Goes to logic 1 and remains at this value until optimum start time occurs the following day Internal Parameters Integral action time Sec Maximum flow temperature F F Deg Heating curve curvature F Heating curve slope ho B Minimum pre heat time j a o 7 Maximum pre heat setpoint No room sensor constant Optimum stop OAT low limit Pre heat time at 0 C OAT Min F Deg Automatic adaption of time constant and dead time Min Enable Min Disable C New Start Enable Optimum stop factor Dead time 1 Time constant 1 Dead time 2 Min With Room Sensor C No Room Sensor Cancel Minimum pre heat time with room sensor P4 Number type Whole number Unit Minutes Default 120 min Range 0 through 1440 min Time constant 2 Min Room control multiplier Kp PERHEELLE Maximum pre heat setpoint with room sensor P8 Number type Decimal Unit Degrees Fahrenheit Default 175F 80C Range 32 through 302F 0 through 150C No room sensor constant P6 Number type Decimal Unit F Deg Default 20 F Deg 10K Range 0 through 36 F Deg
47. output 100 percent XH discharge temperature 74 5577 10 US 14 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Equipment diagram Room_temp Discharge_temp Heating_value Room_temp Discharge_temp Room_setpoint Cascade operation Discharge temp setpoint 95F 35C 68F 20C 65F Room_setpoint 68F Room temperature 18C 20C Master Controller 15 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Direct vs Reverse Acting 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS The output of the CAS operator is reverse acting To use in a cooling application you need a direct acting output Use the DIF operator and set the first input to a value of 100 0 This operation reverses the output Cooling_valve 16 CARE CONTROL ICONS ALPHABETIC REFERENCE Cascade Plus CAS Plus Function Cascade Differences I O Dialog Box Inputs Outputs CAS Cascade controller that acts as a PI controller with a master and cascade controller This cascade controller CAS Plus acts just like the previous cascade controller except that it has an integral action enable disable input This new function requires an additional digital input XD and two new parameter registers for temporary storage This additional input enables CAS Plus to act as a P controller during plant start up and then switch on an Integral component after start
48. reset the Totalizer Input to avoid overflow when its value becomes too large see Totalizer Input Reset in the General Functions section XFM 35 Internal Parameters NOTE You must assign the STARTUP user address to the user address for the CARE STARTUP point Type abbreviations DI Digital input VA Virtual pseudo analog VD Virtual pseudo digital PI Physical input The XFM 35 internal parameters dialog box lists parameters that control program functions Later sections describe how to use these parameters depending on operation desired The table following the dialog box summarizes parameter types functions default values setting range and engineering units The dialog box values and engineering units are not necessarily the defaults 71 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Submodule Parameters xfm_35 csd Ed Index Parameter VYalue Mapped SW Point Unit New Value Moment Power Cons 0 000 0 000 i 0 000 Remaining_Rest_Tim Remaining_Work 0 000 New Unit Possible_Power 0 000 E Max_Switch_On_P 10 000 Safty_Margin 0 000 Hysteresis_Switch 0 500 Unmap Test Param_Change 2 000 Measurem_Procedure 3 000 Measurement_Intery 15 000 Freeze_Time 180 000 Switch On_Wait_Tim 120 000 Limit_1 10000 000 Limit_2 10000 000 Sequ Rotat 0 1 _P1 0 000 Sequ Rotat 0 1 _P2 0 000 Sequ Rotat 0 1 _P3 0 000 Offset_Factor_ a 0 000 Internal_Parameter 0 000 E 2S at
49. select a replacement for it for example a different user address To highlight press and hold down the left hand mouse button while dragging the mouse cursor across the desired characters Release the mouse button You can now type new values press the DEL key to erase or select a different point address or function Press the DEL key to erase the character to the right of the cursor position Press the Backspace key to erase the character to the left of the cursor position Use the Cut Copy Paste and Select All buttons in the dialog box to help create and modify formulas For example you can highlight and Cut delete elements from one formula and then Paste those elements into a new formula Or you can just highlight and 101 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Copy the elements to keep them in one formula while you Paste them into another formula If you do not highlight part of a formula before clicking Cut or Copy software displays an error message box saying that No text is selected If you do not perform a Cut or Copy before selecting Paste software displays an error message box saying that the Paste buffer is empty e Click desired function from the calculator pad in the dialog box SQRT Square root ex Exponential function to the base e INT Integral DIFT Differential LIN Linear POL Polynomial Double q
50. start up matches the switching point in the Time Program Between these two limits advancement of system start up tyHE is calculated with the following formula tVHE X2 X3 P4 In other words early switch on time equals room temperature setpoint minus room temperature multiplied by the high speed preheat factor The high speed preheat factor indicates how many minutes the system requires to compensate for a deviation of 1 degree It must be entered in Parameter P4 but EOV can independently correct it See Adaptation of Factors in this section Optimized Shutdown in the Heating Mode If the Time Program contains a switch point that shuts the system off while the system is in heating operation XD5 1 EOV optimizes this switch point that is EOV shuts down the system before reaching the switch point so that energy is saved EOV calculates shutdown advance time TyHA the same way as EOH using a linear characteristic curve EOV shuts down the system with the maximum time advance if OAT is equal to the room temperature setpoint and room temperature In this case EOV guarantees that the room temperature setpoint is closely followed until the switch point is reached in spite of early shutdown as the heat losses from the building are zero because of OAT 74 5577 10 US 134 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE EOV shuts down the system without advance when the actual OAT is less than or equ
51. temperature can occur because of the prolonged heating effect This energy is sent to the service water storage tank through the delayed charging switch off The following diagram illustrates this situation with the service storage tank supply temperature increase IHW temperature setpoint time loading pump on OFF ARE valve opens ON time s 29 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Duty Cycle DUC Function 1 0 Dialog Box 74 5577 10 US EN2B 0184 GE51 R0404 Europe Inputs DUC Switch HVAC systems on and off at variable intervals to save energy while maintaining room conditions For example during normal occupancy the DUC command switches the building s air conditioning and ventilating systems off at variable intervals provided that required room conditions exist DUC switches off fans on a preferential basis A requirement for intermittent operation is that the systems have adequate performance reserves especially during the transitional seasons In general such systems run at partial load when heating and cooing while the pumps and fans necessary to deliver the heat operate at full capacity Intermittent operation reduces running time and thereby saves electricity This function applies to heating only cooling only and combined heating and cooling systems The following diagram illustrates duty cycle op
52. the amount of time the load has been OFF or ON respectively The load that has been OFF the longest is turned ON first The load that has been ON the longest is turned OFF first Excluding the effects of the Maximum Off Time function the RM input and manual override on the loads shed and restore action resembles true rotational or circular action as pictured below OFF 3RD COMMAND SWITCH ON 5 LOADS 3RD COMMAND SWITCH OFF 6 LOADS C8017 You select the rotational mode of load switching in each priority group by setting Parameters P15 for Group 1 P16 for Group 2 and P17 for Group 3 in XFM 35 to one XFM 35 passes these parameters to each XFM 36 1 via the corresponding user addresses ID___Rotating_P1 ID__Rotating_P2 and ID__Rotating_P3 The user address is not required if only XFM 36 1R is used in the priority group The rotational mode switches an XFM 36 1 R load independent of its rank in the group Parameter P14 Load Number Each XFM 36 1 R in a group counts the duration in seconds of its ON status and stores it in Parameter P8 It stores its OFF status in Parameter 9 The maximum value of all P8s in a priority group is stored in user address IA__On_lIndex_P1 2 3 The maximum value of all P9s is 89 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS stored in A___ Off_Index_P1 2 3 The next load that can switch on is the XFM 36 1 R that has the greatest Switch Off Index P9 valu
53. the curve stays within the minimum and maximum Y scale range If you decrease the maximum on the Y scale from 100 to 60 RAMP changes the Y scale maximum for Curve 1 from 80 to 60 within the overall Y scale range RAMP also changes the Y scale minimum for Curve 2 from 80 to 60 for the same reason RAMP Example This example shows how to set up a year round compensated space setpoint OAT Sensor Setpoint Set Ymin Ymax Xmin and Xmax to determine the scale limits Space setpoint Ymax 30 22 20 Ymin 15 OAT D Q 5 20 25 50 Ce Se ee change change of 30 of 30 During the winter OA Space Xb 20 20 Yb Xa 5 22 Ya During the summer OA Space Xb 20 20 Yb Xa 25 22 Ya Inaccessible Parameters X parameters are not available for modification in controllers 74 5577 10 US 156 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Read RIA Function Initial Dialog Box Input Attribute Selection Dialog Box Read one to five attributesfor a user address and make these values available as inputs to other control icons or hardware software points The RIA icondisplays the following dialog box when you first place the icon in the work space and click it Select the point you want to read from and then connect it to the ADR input in the RIA box RIA Ria ADRO Any point ADR After you connect an input to ADR the Attribute Selection dialog box displays Select the d
54. three outputs Click the value in the box and type a new value to change it Click Scale to save the entries The Xb values change to match the new maximum 4 Define Ya by clicking the scroll bar on the left near the left hand border of the dialog box You can use the same techniques as for the other scroll bars Define Yb by clicking the scroll bar on the right near the left hand border of the dialog box Ya can be higher or less than Yb 5 If desired select another Y output and define its curve 6 Click OK to save The following diagram shows how software interprets the graph 7 7 N Y1 Yb 1 Ya 1 P3 Ya 1 the minimum of the Y1 output P4 Yb 2 the maximum of the Y1 output P5 Slope of the Y1 output Formula 5 YO 1 Ya 1 ee for Xa 1 Xb 1 P5 0 if Xa 1 Xb 1 P6 Y1 intersection with the Y axis P7 Ya 2 the minimum of the Y2 output P8 Yb 2 the maximum of the Y2 output P9 Slope of the Y2 output Formula 161 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS P9 ube tag for Xa 2 Xb 2 Xb 2 Xa 2 P9 0 if Xa 2 Xb 2 P10 Y2 intersection with the Y axis P10 Ya 2 LE Yala 5 Xa 2 Xb 2 Xb 2 Xa 2 P10 0 if Xa 2 Xb 2 P11 Ya 3 the minimum of the Y3 output P12 Yb 3 the maximum of the Y3 output P13 Slope of the Y3 output Formula P13 aE vee for Xa 3 Xb 3 Xb 3 Xa 3 P13 0 if Xa 3
55. units They then calculate current power consumption compare it to a power limit and decide which load s to switch on or off Using XFMs When using XFMs in custom control strategies keep in mind the following notes about the unique behavior of the underlying XFM software CAUTION Mixing XFMs with other control icons in a control strategy loop results in the creation of individual submodules for each XFM Software places all other icon control functions and their subsequent parameters in the Main Module Main Module parameters are limited to a maximum of 128 so combinations of complex control restriction strategies that contain XFMs may be limited by this parameter XFM Outputs You must connect all XFM inputs and outputs to a valid user address even if you are not using the output in the control strategy Valid user addresses can include flag points internal user addresses or pseudopoints ENTHALPY Function Calculate enthalpy and humidity ratio based on temperature and relative humidity This function operates in a similar way to H X control except that the XFM works in English units temperatures in Fahrenheit rather than metric units temperatures in Celsius 1 0 Dialog Box XFM enth csd Inputs Tmp temperature RH relative humidity Outputs h enthalpy W humidity ratio 74 5577 10 US 50 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Internal Parameters
56. up is complete Cascade controller Three analog inputs where X Master controlled variable XH Cascade or auxiliary controlled variable W Reference variable also known as setpoint You can enter the reference variable as a parameter engineering unit index number and value One digital input XD that enables and disables integral control action When XD is zero integral action in the master and cascade controllers is disabled and the associated integral sum is reset XD must always be connected One analog output Y 17 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Internal Parameters Master controller Cascade controller Parameter Number Descriptions 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Master Controller Proportional band Xp Integral action time Tn Sec Min output casc controller op Max output casc controller Cascade Controller Proportional band Xp 2 Integral action time Tn Sec Minimum output bp Maximum output caneri Proportional band Xp Number type decimal Unit same as controlled variable X Default 2 0 Range 0 through 100 0 Proportional band value is equivalent to the throttling range Integral action time Tn Number type whole number Unit seconds Default 1000 sec Range 0 through 7200 sec If Integral action time is less than 15 seconds integral control is disabled Minimum output Nu
57. value of the user address IA___On_Index_P1 2 3 is less than or equal to the XFM 36 1 R switch on index Parameter P8 for example XFM 36 1 R is in the second priority group the value of IA On_Index_P2 is 145265 and the switch on index Parameter P8 has the same value 145265 The minimum ON time Parameter P10 of the XFM 36 1 R has expired The following table lists the parameters used for the rotational switching of loads Number Type escrpon Range vatue unit Number Type Description Range Value 8 Display Switch On Index time load hasbeen ON none none _ Integer _ 9 Display Switch Off Index time load has been OFF none none__ Integer _ fi1 Comm Minimum OFF Time 0 400 60sec 13 Comm Mode of Operation 0 1 2 Integer 0 Auto 1 ON 2 OFF Power of the Load 01000 7000 Progr 74 5577 10 US EN2B 0184 GE51 R0404 Europe Feedback Op_Mode 0 1 2 2 Integer O RM for status_ feedback 1 RM AND Po 2 No RM function RM Functions Parameter P16 determines whether the RM input of XFM 36 1 S R provides load status feedback is an additional control to switch on the load or has no effect at all If Parameter P16 is 0 XFM 36 1 S R uses the RM input to receive the status feedback ON or OFF from the load The input RM initiates the minimum ON or OFF time functions when load status changes from OFF to ON or from ON to OFF respectively If Parameter P16 is 1 XFM 36 1 S R uses the input RM as a software inpu
58. whole window limit setpoint P13 or P14 kW times window hours To determine the possible power the rate of consumption that will result in consuming the remaining energy the remaining energy is divided by the time in hours of 1 10 of a window Example 1 Window 1 4 hour 15 minutes Limit setpoint 600 kW Z1 45 kWh Z9 165 kWh Z10 181 kWh Datapoint user address IA___ Energy_Intv indicates the current energy used so far within the sliding window equal to Z19 minus Z4 in the previous diagram The General Functions subsection explains the other Datapoint user addresses used in this algorithm Possible allowed Power P4 Limit Setpoint x Window 49 44 1 10 x Window 600 kW 1 4 hr 181 kWh 45 kWh 150 kWh 136 kWh 7 0 1 0 25 hr 0 025 hr TOOT 40 8 410 2 Current Power Consumption P1 Te b 4 10 Window 7 181 kWh 165kWh _ 16 640kW 0 1 0 25 0 025 The power value to be switched P4 P1 560 kW 640 kW 80 kW Therefore a 80 will be sent out to the Po outputs of XFM 35 to have the XFM 36 1 S Rs shed 80 kW of loads Parameter 6 provides a safety margin between the power limit setpoint Parameter 13 or 14 and the actual operating setpoint The value of Parameter 6 is subtracted from the value of Parameter 13 or 14 whichever is in effect before calculating the possible power P4 Therefore P6 has a greater effect on the value of the kW to be shed than if it were subtrac
59. will be located Therefore some XFM 36 1 S R preassigned pointnames must be edited in the datapoint dialog box with the priority group number to which the XFM 36 1 S R belongs 64 CARE CONTROL ICONS 65 XFM 35 Po1 SWITCH POWER Po2 SWITCH POWER Po3 SWITCH POWER IA___Energy_Intv ID___Sync_failed ID___Peak_Load ID___ Shutdown ID___Off_Prio_1 ID___Off_Prio_2 ID___Off_Prio_3 ID___Man_load_shed ID__ON Prio3 ID__ON Prio2 ID__ON Prio_1 ID___Rotating_P1 ID___Rotating_P2 ID___Rotating_P3 XFM 36 1 Po St ALPHABETIC REFERENCE TOTALIZER Zi SYNC PULSE SYC SWITCH POWER Pot SWTICH POWER Po2 SWITCH POWER Po3 ID___ Tariff STARTUP ID___OFF_Prio_1 ID__OFF Prio 2 ID__OFF_Prio_3 ID__ON Prio_3 ID__ON Prio 2 ID__ON Prio_1 Counter _Zi Po RM 1IA__Off_Index_P ID___Rotating_P IA___On Index P A___Off_Index_P ID Off Prio IA___On_Index_P ID On Prio ID___Off_Prio Sais ID___On_Prio ID___Peak_Load ID___ Shutdown XFM 36 1R Po St Po RM ID___On_Prio ID___On_Prio ID___Off_Prio ID___Off_Prio ID___Peak_Load IA___On_Index_P ID Shutdown A___Off_Index_P IA__On_Index_P A___Off_Index_P XFM 36 1S Po St Po RM ID___On_Prio ID___On_Prio ID___Off_Prio ID___Off_Prio ID___Peak_Load IA___On_Index_P ID___ Shutdown IA___On_Index_P C8014 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS The following figure shows a small p
60. with a point P4 X3 if X3 is not connected with a point If X2 is connected with a point X3 is numbered parameter 4 See the Examples chapter in this manual for applications that use the SWI control icon Also see the Digital Conversion note in the Mathematical Editor MAT section You can use SWI to convert a digital point to analog values for use in a mathematical formula 9 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Average AVR Function Calculate the average of multiple analog inputs two through six I O Dialog Box AYR average Inputs Two through six analog inputs X1 through X6 Minimum two inputs You can enter the first input as a parameter engineering unit index number and value Output One analog output Y Internal Parameters None 74 5577 10 US 10 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Cascade CAS Function V O Dialog Box Inputs Output Internal Parameters a Provide both a master Proportional Integral PI controller and a secondary PI controller to handle difficult control sections The master PI manages the setpoint for the secondary cascade PI The secondary PI provides the setpoint reset schedule which because of the PI function can be nonlinear CAS operates the same as a PI controller with the addition of a compensation input See the Cascade Operation note in this sect
61. work limit the shutdown function releases the loads and D___ Shutdown is reset to 0 This shutdown function is also used after a power failure for a new start up the power control by XFM 35 and XFM 36 1 see the Start up After a Power Failure note earlier in this section 82 CARE CONTROL ICONS Totalizer Input Reset Counter_Zi ALPHABETIC REFERENCE The Totalizer Counter_Zi transmits the rising measured kWh value to the first XFM 35 input Zi Totalizer Counter_Zi is reset to zero when a limit internal constant value of 108 kWh has been exceeded This reset also resets all the internal archives of past kWh values past samples to their values minus the value of Counter_Zi that is nearest to 106 kWh This reset of the Totalizer input Counter_Zi and the archives of past kWh values provide a correct power calculation and avoids any overflow of internal registers for increasing kWh values The datapoint with pointname Counter_Zi is needed to bring the totalizer point value into the XFM a second time to implement the next strategy Purpose Features XFM 36 I O Dialog Box 1 0 Descriptions XFM 36 1 Description XFM 36 1 36 1S and 36 1R are single stage load programs A priority group of XFM 36 1 programs can do either sequential or rotational load control A priority group of XFM 36 1S programs can do sequential load control and a group of XFM 36 1R programs do load control XFM 36 1S and 36 1R use less memory and cycle t
62. 0 Internal parameter P11 Internal parameter All internal parameters are for software use only Purpose Formula Procedure 74 5577 10 US EN2B 0184 GE51 R0404 Europe Integral Function INT Dialog Box Calculate an integral INT Lim to Ti SUM x The summation of user address x multiplied by the quotient from cycle time to and reset integral action time Ti The sum of the integrals is limited dependent on the value of Lim Lim lt x lt Lim User address x can be a physical point pseudopoint or flag 1 Click INT RESULT The integral function dialog box displays Example with values x OA TEMP Lim 3 sec 2 Select a user address for the x value function variable Use one of the following methods e Select a user address from the physical point bar in the Control strategy or Switching logic window Type a user address name e Select a pseudopoint In the Control strategy function click the desired pseudopoint in the pseudopoint bar at the bottom of the window In the Switching logic function Click menu item Software points The list of pseudopoint types displays Click the analog type The Create select software point dialog box displays Click the desired point from the list Click OK The pseudopoint address displays in the formula Click End in the Create select software point dialog box to close it RESULT User address displays in the dialog box
63. 01a csd ahcsb02a csd ahescOla csd ahescO2a csd ahdmaOla csd ahdmb01a csd ahecalla csd ENTHALPY ENHANCED PID FLOW LEAD LAG UP DOWN RAMP 49 H X control in English units temperatures in Fahrenheit PID with additional features such as built in start up ramp direct reverse action selection integral recalculation to prevent windup below minimum above maximum and an auxiliary input for limit applications and integral reset Output is a calculated flow rate Input is from a flow sensor air gas water etc This XFM controls two devices with lead lag logic As an input varies between a minimum value and a maximum value the output follows on a time delayed basis 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE ratio csd RATIO xfm_34 csd _ Totalizer xfm_35 csd xfm_36 1 csd Power Demand CARE CONTROL ICONS As an input varies between two input bounds output varies between two output bounds Output can be bounded or unbounded Totalizer module that 1 Logs and displays current hourly and daily energy usage 2 Logs and displays past hourly and daily energy usage 3 Logs the total energy usage from program start up or current monthly usage Energy usage can include electrical current water gas or heat This function eliminates the need to connect an external frequency counter The power demand control functions measure the energy consumption of the plant electrical
64. 1 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Cycle CYC Function Output an analog or digital value on a cyclic basis 1 0 Dialog Box Cyclic timer Input One digital input XD required Output One digital output YD Internal Parameters On time Off time Parameter Number Descriptions CYC Operation 74 5577 10 US EN2B 0184 GE51 R0404 Europe On time Off time Cancel Number type whole number Unit Seconds Default 20 sec Range 0 through 7200 sec This value defines the duration of the high impulse level impulse width CAUTION Zero 0 is a legal value but should not be used because it disables the timer and does not accept on line changes Number type Whole number Unit Seconds Default 0 sec Range 0 through 7200 sec This value defines the duration of the low impulse level impulse pause P3 On time seconds P4 Off time seconds On time establishes the duration of the high level while Off time establishes the duration of the low level Software sends the sequence to Output Y as long as a signal greater than or equal to 1 is present in Input X Illustration On time High level Low level Off time 22 CARE CONTROL ICONS ALPHABETIC REFERENCE Output Variations The output cycles only while the input is 1 Input On time 10 OFF time 5 Output If the OFF time is set to 0 a single positive pulse is generated Input On time
65. 11 Cascade Pl s CAS PIUS sc eicctiveccectstevetedde aeoteh tered era Ee vehi KE a AA 17 Changeover Switch CHA seessssssesssiiesriiiesrissriresiiiiesrinnetinnstintnsiinnetinnnennnntnnn 21 Cycle CYC vices scncisescunnancaseneietverneteccaencusbbedes tyes ces ebtphennaseedeaueis E hee 22 D ta Transfer IDV a cies acorn a a E e aA ES r R A aa aA A RES 24 Digital SWitCh 2PT AEE EE EEEE AE EA AE 27 Duty Gycle DUC J imei aieas ioeie ae Aen ae derasa naai aeae deaa 30 Economizer ECO ea reren pa eo einar eaae a aaan e Enea ao ade edena SA EET tni 36 Event Counter EVC mcii aeree e geiene earrainean 48 Fixed Applications XFM veraiamen ina a aa aea 49 ATHA A a T E a N e e 50 ENHANCED PID EPID insertii erireisid reii k aee 52 FLOW CALCULATION FLOW 00 ee eeeeceeeeeneeeeeeeeeeeenneeeeeenaeeeeeenaeeesnneeeeneaa 56 Pe EAD LAG os E hs Mewtive stad E E E EA E E 57 UP DOWN RAMP raae a a a naa e Lad a a ea scents Taaa LNE 59 RATIO riina t inert ieee cee wala Eai 60 Totalizer XFM iisccectece echedees lseeeedouieeeecladeenntdbev iia eestle te eeettenieeteiticetes 61 Power Demand Control XFMS eeccceeeeeeeeeeeneeeeeeeeeeeeeeeeeeeaeeeseeaeeeenneeeeneaa 62 XEM 35 Description tecieie eee sided ene 69 XPM 35 AIQOrithMS irn e e a a iiaa 73 Priority Groups and their Switching Behavior 78 XFM 35 General FUNCHONS teisi aget iaieiiea E 79 XFM 36 1 Description ssassn iton eei i e n 83 XFM 36 1 Priority Group Assignme
66. 3 0 1 x3 Sensor_3 When sensor values are Sensor_1 76 Sensor_2 70 Sensor_3 68 The LIN calculation is 0 7 76 0 2 70 0 1 68 53 2 14 6 8 128 0 Purpose Formula Procedure Polynomial Equation POL Dialog Box Set up a polynomial function POL x a1 x a2 x a3 x a4 x a5 Where a1 through a5 are parameter entries and x is the user address of an analog point pseudo or physical or flag 1 Click POL in the top row of the mathematical editor dialog box RESULT The polynomial equation dialog box displays POLYNOMIAL x a1 x a2 x a5 2 Select a pseudopoint for the x value function variable Use one of the following methods e Select a user address from the physical point bar in the Control strategy or Switching logic window e Type a user address name e Select a pseudopoint In the Control strategy function click the desired pseudopoint in the pseudopoint bar at the bottom of the window In the Switching logic function Click menu item Software points The list of pseudopoint types displays Click the analog type The Create select software point dialog box displays Click the desired point from the list Click OK 109 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS The pseudopoint address displays in the formula Click End in the Create select software point dialog box to close it RESULT
67. 34 Correcting variable 139 Counter_Zi 83 Creating ramp 152 CYC operation 22 Cycle CYC 22 Cycle duration 31 D Data Transfer IDT 24 Datapoints 4 methods of creating 5 DIF 166 Difference between multiple analog input values 166 74 5577 10 US EN2B 0184 GE51 R0404 Europe 219 Differential Function DIFT 106 DIFT 106 Digital conversion 103 Digital point information in a formula 103 Digital Switch 2PT 27 Direct acting example 163 Direct vs reverse acting 16 Direct acting controller 145 Disturbance 145 DUC example 33 Duty Cycle DUC 30 Duty cycle operation 30 E e x function 102 ECO 36 ECO example 47 ECO operation 38 Economizer ECO 36 Enhanced PID EPID 52 Enthalpy 50 EOH 116 127 EOH operating procedures 118 EOH operation example 126 127 EOV 130 132 EOV example 130 EPID 52 Euler s number 102 EVC function 48 Event Counter EVC 48 Examples 177 attenuator 179 average value calculation 180 floating limits and alarm suppression 184 operating pump switchover 190 optimized start stopr 194 positioning signal limitation 195 Existing formula 103 Extended Function Modules XFMs 49 Extrapolation algorithm 76 F File Manager window 209 Fixed applications XFM 49 Fixed Off Times 32 Floating Limits and Alarm Suppression example 184 FLOW 56 Flow Calculation FLOW 56 Formula entry procedure 100 Formula example 99
68. 4 Europe Inputs Output NIPU Output an on off value to start and stop ventilation and air conditioning systems to precondition rooms when cold outdoor air is available during non working hours usually nighttime To switch on the air conditioning as late as possible this function permits room temperature to drop below room temperature setpoint during night cooling NIPUachieves this action by resetting the room temperature setpoint downward Minimum outdoor air temperature is limited to prevent damage from excessively cold outdoor air Night purge x1 O x2 O xD3 O x4 O xs O With an outdoor air temperature at night of 59F 15C the plant purges the room air with 100 percent outdoor air to enable the cooling function to start as late as possible the following day Four analog inputs X1 X2 X4 X5 one digital input XD3 where X1 Room temperature X2 Outdoor air temperature XD3 Night cooling digital input 0 No 1 Yes This value turns night cooling on and off X4 Room temperature setpoint shift X5 Room temperature setpoint One digital output YD This output switches to 1 when all the following conditions are met 1 Room temperature minus outdoor air temperature is greater than the Room OAT min differential value set in the internal parameters dialog box 2 Room temperature is greater than room temperature setpoint plus room temperature setpoint shift The value of the shift must be
69. 4 5577 10 US 188 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS EXAMPLES The following flowchart shows the required logic for floating limits read setpoint from pseudopoint max limit 1 setpoint d max min limit 1 setpoint d min write limits to the corresponding attributes of supply sensor using WIA 189 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS The following flowchart shows the required logic for alarm suppression START Set alarm_suppression Set alarm_suppression to NO to YES write value to the attribute alarm suppression of the sensor using WIA 190 CARE CONTROL ICONS EXAMPLES To implement these procedures in CARE you can use a switching table and a control loop with WIA ADD and DIF control icons The following diagram illustrates the required CARE setup supply sensor fan status v alarm_suppression fan_status WIA X maximum limit 1 X minimum limit 1 X setpoint 191 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS Operating Pump Switchover Purpose Control Icons Description 74 5577 10 US EN2B 0184 GE51 R0404 Europe Switch pump operation between two pumps dependent on hours of operation RIA reads the operating hours at
70. 404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Maximum limitation with mixed air damper operation 50 working range e g 30 Ytmax 80 Direct acting signal has a solid line Reverse acting signal has a dashed line 74 5577 10 US 44 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Minimum limitation with regenerative transfer operation 50 working range e g 30 Ytmin 20 Module 5 Moisture Recovery This module functions the same as Module 4 except that it calculates a signal from the humidity controller X2 The module outputs continuous positioning signal YF Module 6 Selection Logic This module evaluates the results from Modules 1 through 5 and decides whether to transmit positioning signal YT or YF to output Y of the ECO control icon The following table summarizes module logic haL gt hAbL HAL lt hAbL Need Need Cooling Heating Cooling Heating for for Reduce Increase more more more more Heating Cooling Humidity Humidity expensive expensive expensive expensive 0 1 0 1 MAX MAX MIN MIN 0 1 1 0 MAX MAX MIN MIN 1 0 0 1 MIN MIN MAX MAX 1 0 1 0 MAX MIN MIN MAX A zero in the table indicates no need A one indicates a need MAX indicates selection of the maximum of either the YT or YF signal for the Y signal MIN indicates selection of the minimum of either the YT or YF signal for the Y signal In a partial
71. 51 R0404 Europe CARE CONROL ICONS ALPHABETIC REFERENCE Chapter Contents This chapter describes each control icon as follows Function Formula I O Dialog Box Inputs Outputs Internal Parameters Parameter Number Descriptions Operation Example s Statement of control icon purpose Formula related to icon if any Reproduction of the I O dialog box that displays in the control strategy work space for selection of control icon inputs and outputs Description of required inputs Description of required outputs Description of the icon s internal parameters dialog box that displays for entry of the parameters in the Control strategy work space Not all control icons have an internal parameters dialog box Parameter number assignments Parameters are identified with a P and a number for example P3 P4 The parameter list file generated during CARE translation documents control icon parameters and references them via these numbers See Appendix A Parameter List Description for more information about the list file Note that parameters 1 and 2 are reserved for system use Therefore all parameters described for the control icons start at number 3 Some icons have an operation section that details special steps or provides a functional description of the icon Sample application s of icon See Also gt Control Icon Operation in the Introduction chapter for a general description of the I O dialog b
72. ABETIC REFERENCE This relationship means that the mixed air setpoint is limited to the sum of minimum mixed air setpoint and mixed air reset range when X3 is at the lower end of the zero energy range And when the average zone temperature is within the ZEB P13 Y5 X3 X5 P3 P7 2P3 if X5 P3 lt X3 lt X5 P3 Example Maximum zone temperature X1 70 Minimum zone temperature X2 66 Average zone temperature X3 66 Comfort range P3 4FDeg Min mixed air setpoint P7 55 Mixed air reset range P13 12FDeg Room temperature setpoint for example from a Time Program X5 68 y5 12FDeg 66 68 2 55 60 0 2 4F Deg ZEB Cooling Operation When the ZEB Load reset mode P8 in the internal parameters dialog box is equal to 1 ZEB 3 Cooling control or 4 Heating and cooling the ZEB energy management function calculates a cooling setpoint as follows If the warmest temperature sensor value goes above the ZEB upper limit mechanical cooling is enabled Cooling is then controlled to maintain the cooling setpoint Y4 To calculate the cooling setpoint the maximum zone temperature the highest value of all the configured zone sensors Input X1 is required Then the cooling setpoint is calculated based on a linear relationship with X1 and is sent to output Y4 If the highest zone temperature is at or above the upper limit of the cooling band then the minimum lowest cooling setpoint
73. Cancel Default Parameter Setting Number Type Brief Description Range Value 1 Display Moment_Power_Cons current power consumption Display Remaining_Rest_Tim e not for Sliding Window Display Remaining_Work not for Sliding Window Display Possible_Power with constant power consumption 3 Max imum _Switch_On_P ower 1 1000 Safety_Margin 0 1000 0 5 Hysteresis_Switch for power 0 1000 Comm Test Board Param eter _ Change Set to 1 0 1 2 3 when changing any other parameter Comm Measurem_Procedure algorithm type 1 Sliding 1 2 3 Window 2 Ideal Curve 3 Extrapolation 15 Freeze_Time not for sliding window 30 300 180 Switch On_Wait_Tim e 0 240 Power Limit_1 for ID___ Tariff 0 0 106 Power Limit_2 for ID __ Tariff 1 0 106 Progr Prio Rotat 0 1 _P1 sequential or rotational load Oor1 shed method for priority 1 groups Sequential 0 Progr Prio Rotat 0 1 _P1 sequential or rotational load Oor1 shed method for priority 2 groups Sequential 0 Progr Prio Rotat 0 1 _P1 sequential or rotational load Oor1 shed method for priority 3 groups Sequential 0 Comm Safty_Factor_ a offset factor for Ideal Curve 0 1000 algorithm 74 5577 10 US 72 EN2B 0184 GE51 R0404 Europe 120 10 Comm Measurement_Interv al window size 1 7200 P ing window 3 4 5 7 10 11 12 13 14 15 16 17 18 9 CARE CONTROL ICONS Sliding Window Algorithm M eT Int Internal Param
74. Dialog Box Inputs Outputs EOV Example EOV Calculate optimized values for starting and stopping air conditioning systems Systems should start at the latest possible time and should stop as soon as possible to save energy There are two modes of EOV operation heating and cooling Optimised ventilation One through five inputs XD1 X2 through X4 and XD5 XD1 is the input for the user address associated with the Time Program that controls occupancy In other words this user address in the Time Program controls the occupied unoccupied mode of the system A logical 1 is occupied a logical 0 is unoccupied X2 is a room temperature setpoint You can enter X2 as a point or parameter engineering unit index number and a value X3 is the room sensor input X4 is the outdoor air temperature OAT sensor XD5 sets the mode of operation heating or cooling Heating is 1 cooling is 0 You can set XD5 from a switching table evaluation of the heating and cooling outputs from ZEB One through three digital outputs YD1 through YD3 YD1 commands system start up 1 and shutdown 0 This output is required YD2 is logical 1 during system start up Otherwise it is 0 YD3 is logical 1 during system shutdown Otherwise it is 0 You can use these outputs in conjunction with an increased room temperature setpoint during the preheat phase See the Optimized Start Stop application in the Examples chapter for a description of
75. Europe parameter physical point or another control icon WlAwrites to a maximum of three attributes for one point The WIA icon displays the following dialog box when you first place the icon in the work space and click it Select the point you want to write to and then connect it to the ADR output in the WIA box One point any type ADR After you connect an output to ADR the Attribute Selection dialog box displays Select the desired attributes Attribute Selection Attribute 1 Suppress Alarm Attribute 2 0TA C0 tet aa 7 Attribute 3 No Attribute i 1 Select desired attributes by clicking the down arrow to display options and then clicking desired attribute See Attributes Table for possible selections Click OK to save selections and close the dialog box Cancel closes the dialog box without saving selections RESULT The dialog box closes The control strategy work space displays 2 Click the WIA icon to display the secondary WIA I O dialog box Connect input attributes to other control icons or points as desired 168 CARE CONTROL ICONS Inputs Internal Parameters WIA Operation Flowchart orc ide c Ee n C on T T ALPHABETIC REFERENCE One digital input XD1 to enable disable write Enable 1 disable 0 Two input values 1 255 for priority X2 and X3 X2 is command priority X3 is residual overwrite priority If X3 is set to 0 there is no change See Prioritie
76. F 0 through 150 0K Number type Decimal Unit none Default 1 33 Range 0 through 2 0 Number type Decimal Unit none Default 1 6 Range 0 4 through 4 0 Radio buttons determine the following e Whether the automatic adaptation using the time constants and dead time takes place or whether it is started from new Whether or not a room sensor exists P3 Room sensor 0 no room sensor 1 with room sensor P4 Minimum preheat time P5 Maximum preheat setpoint P6 No room sensor constant P7 Optimum stop outdoor air temperature OAT low limit P8 Preheat time at 32F 0C OAT P9 Optimum stop factor P10 Dead time 1 P11 Time constant 1 P12 Dead time 2 P13 Time constant 2 P14 Automatic adaptation of time constant and dead time O enable 1 disable 2 new start enable P15 Room control multiplier Kp P16 Integral action time P17 Maximum flow temperature P18 Heating curve curvature P19 Heating curve slope EOH completes a total setback operation when the next switching point of the optimal heating circuit occurs In this case the supply temperature setpoint is set to 32F 0C At cool down EOH output overwrites the switching point in the Time Program If a further declination of the setback point occurs and is not optimally reached EOH continues to work under normal conditions The cool down phase begins exactly as defined in the Time Program During the cool down phase EOH defines the supply temperature setpoint of the heatin
77. Formula names 99 Formulas used in PID controller 140 Freeze Time function 81 Function hierarchy 103 INDEX G Global receptor point 170 H H X 97 HCA 94 HCA operation 95 Heating Curve with Adaptation HCA 94 Heating optimization with room sensor 122 without room sensor 119 Heating System Off Time Calculation 33 Heating Cooling System Off Time Calculation 35 Humidity and Enthalpy H X 97 Hysteresis 27 Ideal Curve algorithm 75 Inaccessible parameters 155 INT 104 Integral Function INT 104 Integrated controller 138 Intermittent operation 30 Introduction 1 L Lead Lag 57 LIN 107 LIN example 108 Linear Equation LIN 107 Literature 2 Logarithm function 102 MAT Editor 99 Mathematical Editor MAT 99 MAX 111 Maximum MAX 111 MIN 112 Minimum MIN 112 N Negative number 101 Negative values 165 Night Purge NIPU 113 Night Purge example 114 NIPU 113 NIPU and DUC operation 32 114 Notepad procedure 209 O Off Time Calculation 32 Operating Pump Switchover example 190 Optimization with room sensor 116 without room sensor 116 Optimized shutdown in cooling mode 136 74 5577 10 US 220 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Optimized shutdown in heating mode 133 Optimized Start Stop example 194 Optimized start up in cooling mode 135 Optimized start up in heating mode 132 Optimum Start Stop EOH 116 Optimum Start Stop Ene
78. Group 3 St1 Local RM1 Global Controller 1 Po XFM 36 1S O Po RM1 Local St1 Global Controller II St No 50 O RM 74 5577 10 US 68 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Features ALPHABETIC REFERENCE Three algorithms Sliding Window Ideal Curve and Extrapolation for power measurement and calculation Three priority load groups Rotating or sequential switching of loads in a group Two power limits use as required for example by the Time Program Automatic treatment of synchronization and power failure Automatic restart after power failure Control of parameter changes and start up proper integration of parameter modifications Load communication via the C Bus Purpose XFM 35 I O Dialog Box O Descriptions 1 Counter input totalizer XFM 35 Description XFM 35 is a strategy program for maximum load optimization It controls a maximum of three priority groups of loads Each priority group can contain up to 50 single stage load programs XFM 36 1 S Rs connected in a loop After you place XFM 35 in a control strategy bring up its I O dialog box Inputs input bev type SSC ome Sd DI 1 12 XF 523 Totalizer to count work consumption or 1 60 XF 528 Remaining power value from priority group 1 2 Synchronization pulse DI 1 12 XF 523 Required only for ideal curve and or 1 60 XF 528 ext
79. HABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS For radiator heating systems a heating curve slope 1 6 and curvature 1 33 is the default setting The higher the curvature value the more pronounced the curvature Recommended curvature values Floor heating systems 1 1 with a slope of 0 8 and maximum limit of discharge air temperature set to highest value for example 50 Standard radiators or panel type radiators 1 3 Convectors 1 4 through 1 6 It is important to set the curvature value appropriately for floor heating systems or damage may result when outdoor air temperature is low and discharge air temperatures go too high A safety thermostat is recommended to switch off the circulating pump if flow temperatures are too high For other types of heating systems reset of the curvature value is not important where high discharge air temperatures cannot cause any damage Heating Curve Adaptation The controller can use mean values of the room outdoor air and discharge air temperatures to automatically and gradually adjust the heating curve The controller measures room temperature throughout the day On the third day the controller starts correcting the heating curve by adapting it to average room temperature If the curvature value is too high for example 1 6 the discharge air temperature during the first few days may also be too high Adaptation over a relatively long period of time res
80. Maximum heating setpoint Minimum mixed air setpoint ZEB Load reset mode 1 ZEB 2 Heating control setpoint 3 Cooling control setpoint 4 Heating and cooling control setpoint With 1 or without 2 humidity sensor Room humidity limit Heating reset range Cooling reset range Mixed air reset range Setpoint X5 if X5 is a parameter The following diagram illustrates ZEB operation Cascade Setpoints emu Heating Setpoint 36 32 28 Heating Reset Range 24 20 N m 16 iea Cooling Reset Reset Range Range 12 Minimum Minimum 8 Mixed Air Cooling Setpoint Setpoint 4 0 14 16 18 20 22 24 26 Room Temperature ta P3 gt x5 Heat ZEB Cool Range Range Range ZEB Mixed Air Operation When the ZEB Load reset mode in the internal parameters dialog box is equal to 1 ZEB the application includes mixed air damper setpoint management as follows If all three zone temperatures X1 X2 X3 are within the zero energy range ZEB controls temperature only through the mixed air dampers Average zone temperature X3 is the determining factor for the calculation of mixed air setpoint ZEB generates a setpoint at Y5 if the following applies Y5 P7 if X3 gt X5 P3 This relationship means that the mixed air setpoint is limited to the minimum mixed air setpoint when the average zone temperature X3 is at the upper end of the zero energy range YS P7 P13 if X3 lt X5 P3 174 CARE CONTROL ICONS ALPH
81. NS ALPHABETIC REFERENCE After the cool down phase EOH resets output YD3 to zero so that the normal application program is again in control CAUTION It is absolutely essential that the switch point for cool down is the latest possible time point in the Time Program This precaution prevents premature cool down and problems with rooms being outside required conditions Heating Optimization with Room Sensor EOH can calculate the residual heat in a building and the exact preheat points only if there is a room sensor X1 With preheat optimization with a room sensor EOH chooses two alternatives variable temperature preheat or variable time preheat Variable temperature preheat fixes preheat time as a constant Parameter P4 minimum preheat time The following figure illustrates this alternative increase o 2 E D aD E a fe i 6 00 8 00 time outdoor temp approx 41F 5C P4 420 4 min EOH calculates demand flow temperature output Y1 at the beginning of the preheat phase as a function of outdoor air temperature using a heating curve If outdoor air temperature changes during the optimization phase EOH adapts flow setpoint accordingly Parameters P18 curvature and P19 Slope establish the heating curve Parameter P17 limits the supply temperature demand Y1 to the maximum permissible supply temperature Variable time preheat is a transition from variable temperature optimiza
82. P5 is used This upper cooling band limit is specified by adding 3 times the comfort range P3 typically set to 4FDeg to the room temperature setpoint Input X5 Y4 P5 if X1 gt X5 3 P3 If the highest zone temperature is at or below the lower limit of the cooling band an offset called the cooling reset range P12 is added to the minimum cooling setpoint P5 and this sum is used for the cooling setpoint Y4 The lower cooling band limit is specified by adding the comfort range P3 to the room temperature setpoint X5 Y4 P5 P12 if X1 lt X5 P3 When the highest zone temperature is inside the cooling band the cooling setpoint Y4 is calculated with the following formula P12 Y4 X1 X5 3P3 P5 2P3 if X5 P3 lt X1 lt X5 3P3 If the highest zone temperature sensor value is in the cooling band area or higher mechanical cooling is enabled that is YD2 is set to 1 Example Maximum zone temperature X1 75 Minimum zone temperature X2 66 175 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Average zone temperature X3 68 Room temperature setpoint X5 68 Comfort range P3 4FDeg Min cooling setpoint P5 55 Cooling reset range P12 10FDeg 10FDeg Y4 75 68 3 4FDeg 55 61 25 2 4FDeg ZEB Heating Operation When the ZEB Load reset mode in the interna
83. Range Value 12 Comm Switch on Wait Time 0 240 sec Power Limit Setpoint Switchover Either of two power limit demand setpoint values Parameter P13 or P14 can be used depending on the value 0 or 1 of the internal user address ID__Tariff The value 0 atID____ Tariff switches the power limit setpoint Parameter P13 to the power calculation algorithm while the value 1 switches Parameter P14 A simple application for this switchover function is a Time Program that uses ID___ Tariff to switch between power limit Parameters P13 and P14 depending on the time of day The following table lists parameters used for the power limit switchover function Parameter Setting Default Number Type Brief Description Range Value r Switching Behavior of Loads in a Priority Group Power Limit 2 0 108 10000 You can select one of two switching behaviors for each priority group by setting the Parameters P15 for group 1 P16 for group 2 and P17 for group 3 The first switching behavior P15 16 17 is set to 0 is the sequential switching of loads according to the load number P14 of XFM 36 1 of a load XFM 36 1 within a priority group Load number 1 is switched on at first and the loads number 2 3 50 are switched on in a group 1 2 3 The switched on load with the highest number is switched off and shed first Make sure that loads are numbered accordingly Parameter 14 in XFM 36 1 The second switching behavior P15 16 17 is set to 1 i
84. WER Po2 ID___Sync_failed SWITCH POWER Po3 0 RESET OF THE ID___Peak_Load ID___ Tariff LOADS AVAILABLE ID___Shutdown STARTUP TO TURN ON Off_Prio_1 ID___OFF_Prio_1 DETECTION FOR Off_Prio_2 ID___OFF_Prio_2 PRIORITY GROUP 2 Off_Prio_3 ID___OFF_Prio_3 ID___ON_Prio_3 i ID___ON_Prio_2 ID__ON_Prio_1 Counter _Zi Rotating_P1 Rotating_P2 Rotating_P3 0 THERE IS NO LOAD TO SWITCH XFM 36 1 ON IN PRIORITY GROUP 2 RM 9 ID___Rotating_P 1 THERE IS AT IA_Off_Index_P LEAST ONE IA__On_Index_P LOAD IN On Prio_2 ID___Off_Prio_2 SWITCH ON ID__On Prio 2 IN PRIORITY ID___ Peak _Load GROUP 2 _ 0 ALL PREVIOUS ID Shutdown LOADS AND See IN XFM 36 1 0 ALL PREVIOUS ARE ON Po LOADS IN i RM GROUP 2 1 THERE IS AT ID__ Rotating P AREON NNF PS 1 THERE IS AT A LEAST ONE GROUP 2 On Prio 2 ID___Off_Prio_2 LOAD IN TO TURN ON eee ID__On_Prio_2 reno ID Peak _Load 2 TO TURN ON ID___Shutdown XFM 36 1 Po RM ID___Rotating_P IA__Off_Index_P IA___On_Index_P ID__Off Prio_2 ID__On_Prio_2 ID___ Peak_Load ID___ Shutdown ID___On_Prio_2 C8016 The value of ID___On_Prio_2 tells XFM 35 if there are any loads that can be restored turned on in priority group 2 If not XFM 35 will not send out a positive kW value on output Po2 but send it to Pot If ID__On_Prio_1 is 1 To explain data exchange operation start at the output of XFM 35 There is no real starting point because the
85. Xb 3 P14 Y3 intersection with the Y axis P14 Ya 3 ee Nae for Xa 3 Xb 3 Xb 3 Xa 3 P14 0 if Xa 3 Xb 3 The following diagram shows the parameters for the SEQ control icon Y1 Y3 P4 X P13 P14 P3 j P6 P14 74 5577 10 US 162 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Reverse Acting Example ALPHABETIC REFERENCE A PID output can be an input to a SEQ icon that controls three functions heating ventilating and cooling SEQ PID Heating Ventilating Cooling 100 Controller output reverse acting The result of this control over a range of 18 through 22 might look like this 18 20 22 100 50 0 Controller output Y Y Y Open 100 Open 100 Closed 0 X 100 75 25 0 heating ventilating cooling Y1 Y2 Y3 Setup for the internal parameters is as follows Choose Y3 when Xa 0 and Yb Ya 100 and when Xb 25 0 and Yb 0 100 Ya 0 25 10 0 Xb Xa Choose Y2 when Xa 25 and Yb Ya 100 and when Xb 75 Lo and Yb 0 100 Ya 0 25 75 100 Xb Xa 74 5577 10 US 163 EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS 74 5577 10 US Choose Y1 when Xa 75 and Yb Ya 0 and when Xb 100 100 and Yb 100 Ya 0 25 75 100 Xb Xa 100 Direct Acting Example This example uses the Reverse Acting Example and adds an operator to make it direct acting Heating Ventilating Cooling 0 100 Controller output
86. You can use an H X control icon to calculate outdoor air and return air enthalpy One analog output Y 0 through 100 percent 36 CARE CONTROL ICONS Internal Parameters Economy operation range Minimum fresh air Min FA wheel speed Radio buttons Parameter Number Descriptions ALPHABETIC REFERENCE KURILI 0 000 Economy operation range Min FAfvheel speed Full air conditioning plant Partial air conditioning plant Mixed air damper operation Heat recovery wheel Heating costs lt cooling costs Heating costs gt cooling costs Number type decimal Unit percent Default 30 0 percent Range 0 through 100 0 percent The operation range of the ECO icon is located symmetrically around the zero point of the basic controller 50 percent See ECO Operation note later in this section for details Number type decimal Unit percent Default 20 0 percent Range 0 through 100 0 percent This value defines the minimum proportion of outdoor air for mixed air damper operation and the minimum speed rpm for operation with heat moisture regenerative transfer The radio buttons determine the following e Whether the plant operates as a full or partial air conditioning plant e Whether there is mixed air damper operation or heat recovery wheel operation e Whether the heating costs can exceed the cooling costs or vice versa P3 Economy operation range P4 Full 1 or partial 0 a
87. a new value to change it Click Scale to save the entries Define Ya by clicking the vertical scroll bar on the left hand side of the dialog box You can use the same techniques to change Ya values as for the other scroll bars Define Yb by clicking the vertical scroll bar to the right of the Ya scroll bar Yb must be less than Ya Tip gt If desired you can change the Ymin and Ymax values that appear at the top of the dialog box These values establish which area Ya and Yb can span Click the value in the box and type a new value to change it Click Toggle to start work on the other curve Each time you click Toggle you move the focus from one curve to the other Define the X and Y values for the right hand curve in the same manner as for the left hand curve Click OK to save the curves The following diagram shows how the software interprets the graph yM Y2 Yb 2 Ya 2 Yb 1 Ya 1 Y1 154 CARE CONTROL ICONS Parameter Number Descriptions Scale Changes ALPHABETIC REFERENCE P3 Ya 1 minimum value of the first ramp curve P4 Yb 1 maximum value of the first ramp equivalent to the minimum value of the second ramp P5 Slope of the first ramp Formula 5 YO 1 Ya 1 Xb 1 Xa 1 P6 Intersection of the Y axis with the first ramp _f Ye t Yat P6 Ya 1 en n Xa 1 for Xa 1 Xb 1 P6 0 if Xa 1 Xb 1 P7 Ya 2 minimum value of t
88. al from some other PID controller through the EPID before going to the controlled device This control signal passes through unchanged unless the EPID input rises above its setpoint on a high limit or falls below its setpoint on a low limit The auxiliary input mode parameter must be set correctly depending on whether the EPID is reverse or direct acting and on whether it is imposing a high or low limit If this parameter is set to 1 then the auxiliary signal is maximized with the internal PID signal If the parameter is a 1 then the auxiliary signal is minimized with the internal PID signal A parameter value of zero causes the auxiliary input value to be ignored For direct acting low limit and reverse acting high limit set P8 to 1 For reverse acting low limit or direct acting high limit set P8 to 1 The following diagram is an example of a heating discharge air temperature reverse acting low limit application 53 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS LOW LIMIT EPID Htg Disch Air Temp Htg Valve Output Low Limit S P 45 F Aux Input 100 Start Ramp Aux Input 0 100 0 100 Space Temp Ctrl EPID Heating Discharge Air Temp Low Limit EPID Sequence The space temperature sensor modulates the heating coil control valve to maintain space temperature setpoint A heating coil discharge air temperature low limit controller prevents the heating coil discharge temperature f
89. al to the minimum OAT Parameter P5 Between these limits EOV calculates advance time TyHA as follows t _ X4 P5 VHA 120 min _ borr X2 P5 Where tcorr X3 X2 P6 In other words the correction factor equals room temperature minus setpoint multiplied by the optimum stop factor The correction factor changes the slope of the previously defined characteristic curve as a function of the control difference If room temperature equals room temperature setpoint the characteristic curve remains unchanged If room temperature is greater than room temperature setpoint the characteristic curve is steeper and the system is shut down earlier If room temperature is less than room temperature setpoint the characteristic curve is less steep and the system is shut down later The following figure illustrates this relationship N tvna early switch off hrs outdoor air temperature 135 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Parameter P6 optimum stop factor weights the influence of the control difference on the characteristic curve If Parameter P6 is zero EOV calculates early shutdown based on OAT only Optimized Start up in the Cooling Mode When the system is in cooling mode XD5 0 EOV displaces switch on point start up by time tyKE to guarantee room temperature setpoint is reache
90. alue 2 of Line 2 Table 1 55 000 1 37 7 Hysteresis of Line 1 Table 2 5 000 2 38 8 Comparison Value 2 of Line 1 Table 2 32 000 2 39 9 Hysteresis of Line 2 Table 2 3 000 2 40 10 Comparison Value 2 of Line 2 Table 2 55 000 2 41 11 On Delay of Column 1 Table 3 31 000 Sec 3 42 12 Hysteresis of Line 1 Table 3 5 000 3 43 13 Comparison Value 2 of Line 1 Table 3 32 000 3 44 14 Hysteresis of Line 2 Table 3 3 000 3 45 15 Comparison Value 2 of Line 2 Table 3 55 000 3 46 16 Output Value Table 3 100 000 3 47 17 Output Value Table 2 50 000 2 48 18 Output Value Table 1 0 000 1 49 50 Plant ahl 51 Switching table SaFan 209 74 5577 10 US EN2B 0184 GE51 R0404 Europe APPENDIX A PARAMETER LIST DESCRIPTION CARE CONTROL ICONS 52 Parameter file number 3 53 54 P Nr Description Value Eng Unit Symbol Reference 55 56 1 Internal use 0 000 57 2 Internal use 1 000 58 3 Hysteresis of Line 2 Table 1 2 000 1 59 4 Comparison Value 2 of Line 2 Table 1 32 000 1 60 5 Output On Delay Table 1 31 000 Sec 61 6 Output Value Table 1 0 000 1 62 63 Plant ahl 64 Switching table RaFan 65 Parameter file number 4 66 67 P Nr Description Value Eng Unit Symbol Reference 68 69 1 Internal use 0 000 70 2 Internal use 1 000 71 3 Hysteresis of L
91. ameter P12 XFM 36 1 S R switches on the load for the minimum ON time duration Parameter P10 The peak load and shutdown functions have absolute priority and can prevent the XFM 36 1 S R_ from switching on the unit after exceeding the maximum OFF time Display Parameter P7 indicates the expiration of maximum OFF time Automatic load switch on after the expiration of Maximum OFF Time sets P7 to 1 Otherwise P7 is set to 0 When the Maximum OFF time is exceeded the load switches on and display Parameter P5 indicates that the minimum ON time P5 1 function is now active After the minimum ON time the load will turn OFF assuming that the power demand system still wants it shed The following table lists parameters used for the automatic switch on of load after maximum OFF time has expired Parameter Setting Default Number type _ escrption Renge velue unt 5 Display Minimum ON Time Active none none Integer _ 7 Display Maximum OFF Time Expired none none__ Integer _ Minimum ON Time 0 300 60 sec 12 Comm Maximum OFF Time 0 1440 15 min O No maximum OFF time function Manual Operating Mode XFM 36 1 General Functions XFM 36 1 S R includes general functions to provide a manual operating mode stability special features and alarm indications These functions have a high priority in making the final decisions about load switching You can manually set Parameter P13 of XFM 36 1 S R to 1 to keep the loa
92. ameter Setting Default Number Type Brief Description Range Value Comm Maximum Switch on Power 1 1000 Start up After a Power Failure Ideal Curve and Extrapolation only If a power failure occurs XFM 35 uses the following strategy to start up the calculations of the power values 1 A shutdown message is sent to all the XFM 36 1 loads They are switched off by setting the user address ID___ Shutdown to the value 1 after the power supply returns 2 On the next program cycle the shutdown message is gone and XFM 35 starts to switch on the loads with the maximum switch on power value set in Parameter P5 every calculation sample until a synchronization pulse is received 3 After receipt of this pulse power calculations continue normally This start up procedure is not valid for the sliding window algorithm The sliding window algorithm uses the power values that were measured before the power failure occurred for the calculations after the power failure 79 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Parameter Modifications at Run time CAUTION DO NOT modify Parameters P5 to P18 during power calculations Improper power calculations may result Using the Sliding Window algorithm parameter modifications are introduced into the calculations when a sample occurs every tenth of Parameter P10 Using the other two algorithms Ideal Curve and Extrapolation the parameter modificat
93. and a new time delay is initiated When the LdE is turned Off the Ss points that were on continue to run for the time set at Parameter P2 Submodule Parameters lead lag csd Index Parameter VYalue Mapped SW Point Unit New Value Start Up Delay 60 000 Extra_Run_Time Constant_1 74 5577 10 US EN2B 0184 GE51 R0404 Europe New Unit Unmap Modify Cancel 58 CARE CONTROL ICONS ALPHABETIC REFERENCE UP DOWN RAMP Function As an input varies between a minimum value and a maximum value vary an output on a time delayed basis 1 0 Dialog Box XFM ramp csd Inputs Max output maximum input or parameter Inp Input to be ramped Min output minimum input or parameter Minimum and maximum input values impose limits on the output value Outputs Out ramped output Internal Parameters Separate up and down ramp time parameters are provided in the internal parameters dialog box On controller power up the output is set based on Parameter 3 P3 0 output set to minimum limit P3 1 output set to current input within min max limits P3 2 output set to maximum limit P3 3 output set to value of Parameter 4 within limits The rate of change of the output is a function of the span between the Min value the Max value and the up and down ramp times Subtract the Min value from the Max value and divide the result by the appropriate ramp time to determine the rate of change To select a particular rate of
94. and value One analog output Y The output is the correcting variable that maintains the setpoint reference variable The output is usually a controller output signal that repositions an actuator 140 CARE CONTROL ICONS ALPHABETIC REFERENCE PID Schematic The following schematic illustrates the formulas used in the PID controller actual value X P controller Yp Kp Xw output sig controller differentiation Yi Ki Xw dt aE X W D controller Yd Kd om dt setpoint W The internal parameters dialog box defines the proportional integral and derivative terms as well as minimum and maximum output values that limit the positioning signal Y For additional information see the PID Plus section Internal Parameters Proportional band xp Derivate time TY Sec Integral action time Tn 1000 Sec Minimum output oo Maximum output Proportional band Xp Number type decimal Unit same as the controlled variable X Default 3 0 Range 9999 0 through 9999 0 Proportional band value is equivalent to the throttling range NOTE Negative values will accomplish an opposite action on the output DO NOT use zero This does not apply to Derivative or Integral Derivative time Tv Number type whole number Unit seconds Default 0 sec Range 0 through 7200 sec 141 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Integral action time Tn Minimum output Maximum output Parameter
95. ange you need to limit the output to range between 0 and 100 197 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS The following flowchart represents the required control logic START read positioning signal from pseudopoint YES Set Y to 100 YES Set Y to 0 set positioning signal to physical point 74 5577 10 US 198 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS EXAMPLES The following diagram represents the control loop to implement the control logic corrected actuator signal A MAX K minimum limitation 100 XI maximum limitation The minimum and maximum values are best input as parameters as shown in the control loop diagram 0 and 100 percent The MIN statement transmits Y values that are less than or equal to 100 percent The MAX statement transmits Y values that are greater than or equal to 0 percent 199 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS Setpoint Adjustments Purpose Control Icons Example 74 5577 10 US EN2B 0184 GE51 R0404 Europe During the Auto mode of operation adjust the setpoint for a Time Program by 7 Kelvin During the Day mode of operation adjust a permanently assigned setpoint of 20C 68F by 7 Kelvin During the Nigh
96. as a PI controller with a master and cascade controller CAS Same as previously defined Cascade controller with the addition of a digital input and two parameter registers a CHA Depending on the value of a digital input transmit an analog input value by way of one of two analog outputs CYC Establish cyclical operation IDT Transfer a value from one control icon to other icons or points T 2PT On off controller that transmits a digital status depending on two analog values one is a controlled variable the other a reference variable DUC Switch HVAC systems on and off at variable intervals to save energy while maintaining room conditions Eco ECO Determine the most economical system operation for full and partial air conditioning systems eral EVC Event counter fos G XFM XFM Fixed applications that can combine with other submodules or points 3 74 5577 9 US ENOB 0184 GE51R0703 Europe INTRODUCTION Heating Curve with Adaptation Humidity and Enthalpy Mathematical Editor Maximum Minimum Night Purge Optimum Start Stop Optimum Start Stop Energy Optimized Ventilation PID PID with integration time parameter Ratio Read Sequence Subtract Write Zero Energy Band Datapoints 74 5577 10 US EN2B 0184 GE51 R0404 Europe MAT MAT MIN NIPU bee EOH EOH EOV Ea es RAMP RIA RIA VS SEQ ey WIA ZEB N Mm JJ CARE CONTROL ICONS Use a heating curve to calculate
97. ated temperature For example start up maintains 20 seconds on zero then follows with an approximation of the outdoor temperature Before this the approximate outdoor temperature equals the momentary outdoor temperature This action correctly initializes the integral function To use the STARTUP point see Appendix B Startup User Address 181 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS Average Value Calculation Purpose Flowchart 74 5577 10 US EN2B 0184 GE51 R0404 Europe The implementation of some heating limit functions require an average of outdoor air temperature OAT over three days The formula for this calculation is Y average new N Y average old X X n 1 where n varies from 0 to i Average new is the momentary average value Average old is the average value calculated in the previous cycle X is the actual value of the variable that is being averaged The variable n serves to weight the average value relative to the actual value As time increases the weighting of the actual value always becomes less The variable i serves to limit n The following formula defines this limitation i T tO where T Averaging duration and t0 scan time If n reaches the value of i it must remain fixed at this value To average temperature over three days measure OAT every 10 minutes that is scan time t0 is 10 minutes Averaging duration T is 3 days or 4220 minutes So
98. calculated values Comm is used by a commissioning engineer to set or adjust specific plant values 74 5577 10 US 86 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Progr can be preset by the programming engineer using CARE and revised by the commissioning engineer Int is an internal parameter that you must not modify XFM 36 1 Priority Group Assignment A maximum of 50 XFM 36 1s 36 1Ss and 36 1Rs can connect to one another in a group XFM 36 1s 36 1Ss and 36 1Rs connect to one another via the Po inputs and outputs In other words the Po output of one XFM 36 1 S R is the input to another XFM 36 1 S R You assign a group of XFM 36 1 S Rs to a priority group by selecting XFM 35 input Pot Po2 or Po3 as the recipient of the Po output from the last lowest load number XFM 36 1 in the group and the corresponding XFM 35 Po output as the input to the Po of the first highest load number XFM 36 1 of the group For example if you select the Po2 input and output of the XFM 35 the group becomes Priority Group 2 XFM 36 1 S R Switching Behavior The Po corrections carry the power values that each XFM 36 1 S R uses to change the status of its load ON or OFF A positive power value switches on restores the load a negative value switches it off sheds it Several conditions in addition to the Po value the first input determine the final command ON OFF to the load output St The command is sent to th
99. control or 4 Heating and cooling the application also includes dehumidification as follows If the humidity measured by the X4 sensor exceeds the value of P10 Room humidity limit ZEB initiates cooling Relative humidity is the determining factor for cooling If you select an absolute humidity sensor in the internal parameters dialog box ZEB performs a conversion to relative humidity 176 CARE CONTROL ICONS ZEB Example ALPHABETIC REFERENCE To monitor humidity select the With humidity sensor option in the internal parameters dialog box Note that with Heating and cooling applications ZEB Load reset mode equal to 4 ZEB only initiates cooling This option does not inactivate heating Cooling condenses moisture in the air so that it can then be removed Because heating is still active a downstream air heater can bring fresh air to the required temperature again With the ZEB application ZEB Load reset mode equal to 1 cooling takes place with a simultaneous inactivation of heating In addition setpoint management engages the mixed air dampers and demands a setpoint for the dampers determined by the maximum zone temperature With the Cooling control application ZEB Load reset mode equal to 3 when air humidity exceeds the allowable value ZEB only initiates cooling See the System Regulation application in the Examples chapter for a description of a partial air conditioning system with mixed air dampers an air heate
100. controller implements the XFMs in a cyclic manner XFM 35 writes a 0 to ID___ On_Prio_2 to reset it The first XFM 36 1 will write a 1 to the datapoint otherwise it writes a 0 Assuming that a 1 was written to the datapoint the second XFM 36 1 to execute after XFM 35 reads ID__On_Prio_2 If the XFM 36 1 has a load that can be turned ON the XFM 36 1 will read the 1 The value of 1 tells XFM 36 1 to write a 1 to the datapoint whether or not the XFM 36 1 to execute has a load that can be turned on This is to prevent the second XFM from erasing the 1 generated by the first XFM The third XFM 36 1 and subsequent XFMs in larger programs work the same as the second XFM 36 1 67 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS After all the XFM 36 1s write to the ID___ On_Prio_2 datapoint XFM 35 reads it If XFM 35 has to restore some loads it will read inputs ID__On_Prio_1 ID__On_Prio_2 and ID___On_Prio_3 If all are 1 it will restore loads in priority group 3 first then group 2 and then group 1 If any ID___On_Prio datapoint is 0 XFM 35 will not send a restore signal positive kW value to its corresponding Po output The other datapoints exchange data among the XFMs in a similar way The datapoints IA___ Off_Index_P and IA___ On_Index_P however do not exchange data with XFM 35 only XFM 36 1s Use the datapoint tables in each XFM section to determine what information is being exchanged by each datapo
101. ction Ideal Curve and Extrapolation only ALPHABETIC REFERENCE The freeze time function only for the Ideal Curve and Extrapolation algorithms is initiated at the beginning of every measurement interval window and ends after the time set in Parameter P11 has elapsed During the freeze time no power value to switch the loads to the output Po1 2 3 is issued but the calculation algorithm continues to run normally This function is used to prevent incorrect too early load switching at the beginning of every measurement interval The minimum duration of the freeze time minimum value of Parameter P11 is preset to 30 seconds and should not be set to a value less than 30 seconds at run time The following tables describes the parameter used for the freeze time function Parameter Setting Default Number Type Brief Description Range Value 11 Freeze Time not for Sliding Window 30 300 sec Switch on Wait Time The switch on wait time function is valid for all power calculation algorithms and is initiated by the transition of the calculated switching power from a negative to a positive value Parameter P12 sets the duration of the switch on wait time This function provides controlled switching ON of loads after the calculation procedure makes a transition from shedding loads to restoring loads The following table describes the parameter used for the switch on wait time Parameter Setting Default Number Type Brief Description
102. d always ON You can set P13 to 2 to keep the load always OFF These manual settings are useful for test purposes For example you can set Parameter P13 of load number 1 in the third priority group to 1 and all other Parameters P13 for all of the loads to 2 Parameter P1 of XFM 35 will indicate the current power consumption of Load 1 in the third group 91 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS The manual operating mode is also useful for verifying that the correct CARE state ACTIVE or PASSIVE was applied to the load point The default setting of Parameter P13 is 0 to allow the XFM 36 1 S R program to determine load status in the automatic operating mode When the override mode ON is selected the value sent around on Po1 Po2 or Po3 depending on which priority group the XFM is attached is not limited to the value set by parameter 5 in XFM 35 as Max_Switch_On_P This causes the Po value to increase every cycle if there are no loads to shed and results in no shedding of loads until sufficient time has passed to lower the Po value below zero The parameter used for the manual operating mode is shown below Parameter Setting Default Number Type Description Range Value 13 Comm Mode of Operation 0 1 2 Integer 0 Auto 1 ON 2 OFF Minimum ON and OFF Times Minimum ON and OFF times Parameters P10 and P11 are used to avoid cycling of loads that may make XFM 35 power control unstable an
103. d by start up The displacement of the switch on point depends on the difference between the room temperature setpoint and actual room temperature EOV assumes a linear room model early switch on tve X3 X2 P8 room temperature gt The minimum advancement of start up is set by Parameter P7 lowest cooling time for opt cooling You must set this parameter to its lowest value so that the calculated start up point is valid P7 has a range of 0 to 1080 minutes The early switch on time has a maximum limitation of 1080 min 18 hours The minimum limitation of advance time is 0 minutes When room temperature setpoint corresponds exactly to the actual room temperature and P7 is set to 0 system start up matches the switching point in the Time Program Between these two limits advancement of system start up tyKE is calculated with the following formula tVKE X3 X2 P8 136 CARE CONTROL ICONS ALPHABETIC REFERENCE In other words early switch on time equals room temperature minus room temperature setpoint multiplied by the high speed cooling factor The high speed cooling factor indicates how many minutes the system requires to compensate for a deviation of 1 K It must be entered in Parameter P8 but EOV can independently correct it See Adaptation of Factors in this section Optimized Shutdown in the Cooling Mode If the Time Program contains a switch point that shuts the system off while the system
104. d even damage the load A load change from OFF to ON triggers minimum ON time A load change from ON to OFF triggers minimum OFF time During minimum ON time Parameter P10 Display Parameter P5 is set to 1 to indicate that the minimum ON time function is active The load remains ON even if power control via Po output tries to switch off the load Only the shutdown function see description on the following pages can switch off the load during minimum ON time During minimum OFF time Parameter P11 Display Parameter P6 is set to 1 to indicate that the minimum OFF time function is active The load remains OFF even if power control via Po output tries to switch on the load The following table lists the parameters used for the minimum ON and OFF times function re ee at S Number Type Description Range Value Peak Load Function Ideal Curve and Extrapolation Only XFM 35 determines when peak load occurs see General Functions in the XFM 35 section and sets user address ID___ Peak_load to 1 to notify all XFM 36 1 S Rs to stop switching on When the peak load function is active ID___ Peak_load 1 the load cannot switch from OFF to ON Immediate Load Shedding Shutdown XFM 35 determines when immediate shutdown is necessary see General Functions in the XFM 35 section and sets user address ID___ Shutdown to 1 to command all XFM 36 1 S Rs to immediately shed their loads When an XFM 36 1 S R reads a 1 value inID___ Sh
105. e and the next one that can switch off is the XFM 36 1 R that has the greatest Switch On Index P8 value in the group The criteria for rotational switching ON a load are as follows The XFM 36 1 R is in automatic operating mode Parameter P13 0 e Parameter P15 16 17 in XFM 35 is 0 and user address ID____Rotating_P1 2 3 is 1 ID___Rotating_P1 2 3 is not required for XFM 36 1R e The power value at the first input Po is positive and equal or greater than the load power Parameter P15 of the XFM 36 1 R The value of the user address IA___Off_Index_P1 2 3 is less than or equal to the XFM 36 1 R switch off index Parameter P9 for example XFM 36 1 R is in the third priority group the value of IA____Off_Index_P3 is 105600 and the switch off index Parameter P9 has the same value 105600 The minimum OFF time Parameter P11 of the XFM 36 1 R has expired e If Parameter P16 of the XFM 36 1 is 1 input RM must also be 1 see the RM Functions description later in this section for details e User addresses ID___ Peak_load and ID____ Shutdown are 0 that is the peak load and shutdown functions are not active The criteria for rotational switching OFF a load are as follows The XFM 36 1 R is in automatic operating mode Parameter P13 0 e Parameter P15 16 17 in XFM 35 is 0 and user address ID____Rotating_P1 2 3 is 1 ID___Rotating_P1 2 3 is not required for XFM 36 1R e The power value at the first input Po is negative The
106. e calculated from a flow sensor or transmitter air gas water flow etc FM flow csd The input In comes from a flow sensor air gas water etc The input can be direct reading that is in actual engineering units PSI INW etc or generic 0 100 PCT For inputs that read in actual engineering units P2 and P3 must be equal OK to leave default values For generic inputs set P2 equal to the actual sensor range that is the value in engineering units that produces 100 percent at the input The input can be linear or nonlinear If nonlinear FLOW linearizes it by taking the square root The square root function parameters are optimized to produce accurate results for input values between 0 003 and 5000 0 For linear sensors the square root can be disabled Calculated flow rate CFM GPM etc You can set a parameter value internal parameters dialog box so that the output is set to zero if the flow calculations fall below this value You can use this feature to produce a zero output when the associated system is off Submodule Parameters flow csd X Index Parameter VYalue Mapped SW Point Unit New Value Sensor_Range 100 000 Input_Range 100 000 New Unit Yelocity_Constant 4005 000 Area_Factor 1 000 Low_Display_Value 0 000 Input_Lo_ Level 0 100 Unmap Input_Hi_Level 10 000 Lo_Level_Factor 0 100 Mid_Level_Factor 0 900 Modify Hi_Level_Factor 9 000 74 5577 10 US EN2B 0184 GE51 R0404 Eur
107. e cascade controlled variable XH Default 100 0 Range 0 through 100 0 Proportional band Xp Number type decimal Unit same as the cascade controlled variable XH Default 2 0 Range 0 through 100 0 Proportional band value is equivalent to the throttling range Integral action time Tn Number type whole number Unit seconds Default 1000 sec Range 0 through 7200 sec If Integral action time is less than 15 seconds integral control is disabled Minimum output Number type decimal Unit percent Default 0 0 percent Range 0 through 100 0 percent Maximum output Number type decimal Unit percent Default 100 0 percent Range 0 through 100 0 percent P3 Xp proportional band master controller P4 Tn in seconds integral action time of the master controller P5 Min minimum limit of the cascade controller P6 Max maximum limit of the cascade controller P7 Xp proportional band of the cascade controller P8 Tn in seconds integral action time of the cascade controller P9 Min minimum limit of the positioning signal in percent P10 Max maximum limit of the positioning signal in percent P11 W reference variable if entered as a parameter not connected to a point Parameters P5 and P6 serve as the minimum and maximum limits respectively of the setpoint assignment to the cascade controller As an example the following diagram shows a master PID that is the room temperature controller and a secondary PID that is the
108. e file more easily Click the file name to select it Click menu item File dropdown item Print Click OK when the print dialog box displays RESULT The TXT file prints Open Notepad You can find Notepad in a Program Manager window To get to Program Manager hold down the Alt key and press Tab until a message box displays Program Manager Release the keys Find the icon for Notepad and double click the icon to open Notepad Click menu item File then dropdown item Open RESULT The Open dialog box displays with a list of drives and directories Select the drive and directory that contains the TXT files usually C CARE and scroll until you find the desired TXT file Double click the file name to select it and close the dialog box RESULT The TXT file appears in the Notepad window Click menu item File then dropdown item Print setup RESULT The Print Setup dialog box displays Click Landscape Then click OK to close the dialog box Click menu item File then dropdown item Print Click OK when the print dialog box displays RESULT The TXT file prints 211 74 5577 10 US EN2B 0184 GE51 R0404 Europe APPENDIX A PARAMETER LIST DESCRIPTION CARE CONTROL ICONS 74 5577 10 US 212 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS APPENDIX B STARTUP USER ADDRESS Definition 74 5577 10 US EN2B 0184 GE51 R0404 Europe The STARTUP user address or point is a digi
109. e first output St of XFM 36 1 S R These conditions are explained in the following sections including the General Functions section XFM 36 1 S Sequential Load Switching In the sequential mode each load in a priority group has a fixed rank Low ranking loads are shed first while high ranking loads are shed last Load 1 is the highest ranking load and is shed last and restored first The highest load number is the lowest rank It is shed first and restored last The following drawing shows how a group of seven loads responds to restore and shed commands 87 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS PRIORITY OFF PRIORITY GROUP OF GROUP OF LOADS LOADS ON ON 1ST COMMAND SWITCH ON 7 LOADS 2ND COMMAND SWITCH OFF 2 LOADS EM caour oF GROUP OF mas OFF LOADS ON m 5 4 ON 3RD COMMAND SWITCH ON 3 LOADS 2ND COMMAND SWITCH OFF 2 LOADS You select the sequential mode of load switching in each priority group by setting Parameters P15 for Group 1 P16 for Group 2 and P17 for Group 3 in XFM 35 to zero XFM 35 passes these parameters to each XFM 36 1 via the corresponding user addresses ID____Rotating_P1 ID____Rotating_P2 and ID___ Rotating_P3 The user address is not required if only XFM 36 1S is in the priority group The sequential mode switches an XFM 36 1 S load depending on its rank in the group Parameter P14
110. e following flowchart illustrates program action enable timer CYC read physical point NO 74 5577 10 US 206 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS EXAMPLES To implement this extended trend function CYC must be part of a control loop that includes other functions The following diagram illustrates the complete control loop sensor af CYC a K enable_ZTAKT EXECUTING_STOPPED gt gt pseudopoint for trend recording The SWI control icon switches the value of the sensor to the pseudopoint when CYC is in On time Otherwise SWI implements a self hold time for the sensor The switching table uses the system variable EXECUTING_STOPPED The controller automatically sets this variable to LOW as soon as a DDC program has run correctly If the program is done the controller sets the variable to HIGH The switching table for the release of the time cycle is therefore true exactly when a program is running 207 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS 74 5577 10 US 208 EN2B 0184 GE51 R0404 Europe CARE CONROL ICONS APPENDIX A PARAMETER LIST DESCRIPTION Description When you translate a plant in CARE CARE generates a parameter list file that documents the parameters used in the control strategy and switching logic for the plant You can use this reference list after the CARE process is complete and you are testi
111. e is off for 90 seconds This long 90 second time delay prevents the first stage from immediately switching on when the second stage switches back to the first stage This delay is necessary to protect the drive belt The length of the time delay depends on the inertia of the ventilator see the technical description for the specific model of ventilator for inertia data AND The Time Program or application program requests the first stage AND The negative cycle transition from STARTUP occurred at least 60 seconds before that is STARTUP must be zero for a minimum of 60 seconds OR The second ventilator stage was off for 90 seconds The amount of time depends on the technical specifications of the ventilator AND The Time Program or application program does not request the first stage AND The Time Program or application program requests the second stage This condition initially switches the first stage on although the Time Program may already request the second stage AND The negative cycle transition from STARTUP occurred at least 60 seconds before that is STARTUP must be zero for a minimum of 60 seconds The second stage switches on when The first ventilator stage is switched on for at least 60 seconds AND The Time Program or application program requests the second stage These two conditions guarantee that the switch from first to second stage occurs 30 seconds after the second stage is requested AND T
112. e output falls to minimum or rises to maximum or is overridden by the auxiliary input the integral component is calculated so that it is consistent with the actual output The following diagram illustrates the two outputs OUT and RMP of EPID 100 BAN T UP 0 START RAMP t START RAMP TIME TME TIME EPID can control a variable speed drive to maintain duct static pressure The OSV is set to 25 percent and the SRT is set to 180 seconds When enabled the drive starts at 25 percent and slowly increases toward 100 percent taking at least 180 seconds to do so If duct static rises as it should it might take less time to arrive at setpoint EPID can control a heating coil valve mixing dampers and a cooling coil valve in sequence The SRT is set to 300 seconds and the OSV is set to 33 percent assuming equal split in the sequencing setup so that on start up all valves and dampers are closed Then the output can slowly ramp toward 0 percent on a call for heating or toward 100 percent on a call for cooling It takes at least 300 seconds to fall from 33 percent to 0 percent on a call for heating or to rise from 33 percent to 100 percent on a call for cooling Since the cooling side traverses two parts or the sequencing range only half the SRT is seen by the damper or valve Keep this in mind when using sequencing The auxiliary input Aux can prevent integral windup when EPID is used in a limit application In this case you pass a control sign
113. e supply temperature setpoint from the heating curve EOH set output YD2 to logical 0 When preparing the Time Program ensure that the switch point for cool down is always the latest possible time in the Time Program to avoid premature cool down and room temperatures outside the comfort zone Adaptation of Optimization EOH calculates the times for the beginning of preheat and cool down optimization in advance Because the time for optimized preheat varies from system to system even with the same temperature conditions because of the behavior of the heating system and the building EOH maintains a model of the building The dead time and time constants for the building determine the dynamic behavior of the model EOH maintains two models for preheat because it is necessary to distinguish between building characteristics after a short cool down and after a lengthy cool down Dead time 1 Parameter P10 and Time constant 1 Parameter P11 define the first model This building model applies for a preheat that follows a short cool down less than 24 hours Dead time 2 Parameter P12 and Time constant 2 Parameter P13 define the second model This building model applies for a preheat that follows a lengthy cool down greater than 24 hours 125 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS After a lengthy cool down phase the building walls a
114. eating Cooling Based on the positioning signal from the basic temperature controller X1 this module decides whether there is a need for heating or cooling To ensure stability for smaller deviations as well the module establishes a hysteresis symmetrically around the zero point of the basic controller 50 percent It calculates the amount of hysteresis as follows Hysteresis P3 0 15 In other words hysteresis is 15 percent of the working range cool demand 0 hys P3 15 heat demand 1 cool demand 1 lt p heat demand 0 X1 40 CARE CONTROL ICONS ALPHABETIC REFERENCE Module 2 Humidify Dehumidify Based on the positioning signal from the basic humidity controller X2 this module decides whether there is a need to humidify or dehumidify To ensure stability for smaller deviations as well the module establishes a hysteresis symmetrically around the zero point of the basic controller 50 percent It calculates the amount of hysteresis in the same way as for Module 1 15 percent of the working range humidifying 0 hys P3 15 dehumidifying 1 dehumidifying 1 p humidifying 0 X2 41 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Module 3 Characteristic Curve This module calculates the position of the characteristic curve of the ECO icon on the basis of outdoor air
115. ec Error W X causes inherent reverse action Error last controller cycle Current Error Error sum The PID Plus algorithm is implemented in Excel 5000 controller operation based on the following code 33 Reverse Acting PID Controller 33 Integral action is enabled if the integral time is greater than or equal to 15 seconds and the integral 33 action flag Xd is true IF Xd True AND Tn 215 Error_Sum Error_Sum Ey ELSE Error_Sum 0 3 This limits the integral action to the range 50 Error_Limit Xp Tn to 2 Error_Sum MIN Error_Limit Error_Sum Error_Sum MAX Error_Limit Error_Sum 33 Integral Term IF Tn lt 15 Int_Term 0 ELSE Int_Term to Error_Sum Tn Derivative Term Derv_Term Tv E E 4 to Y 50 100 Xp Ep Int_Term Derv_Term Y MIN Y max_out Y MAX Y min_out 151 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS PID Plus Example This example implements automatic switchover from P to PI control The PID Plus derivative parameter must be set to zero to establish PI control The following diagram shows how PID Plus operates in a CARE setup Override Manual l enable component switch on off switch room setpoint_ Enabie_i comp STARTUP There is an automatic switchover from P control during the start up phase to PI control during normal operation The switching table set
116. ed by outdoor air temperature plus preheat time The value of tyy is limited to a maximum of 48 hours 120 CARE CONTROL ICONS ALPHABETIC REFERENCE heat up time at 32F 0C X2 X3 outdoor air temp gt As an example at 32F 0C Preheat time P8 120 min Temperature increase P6 20 F Deg Setpoint X3 68F 20C Outdoor air temperature X2 tvv 120 min 20 10 120 min tyv 60 min The following diagram illustrates this action poss early s setback increase v day setpoint room temperature 6 00 8 00 During this preheat phase EOH transmits a 1 to the output YD2 You can use this output to determine whether to overwrite the supply temperature setpoint from the normal application program by the flow temperature setpoint Y1 from EOH 121 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS If the target time point of the switching program occurs in this time EOH sets output YD2 to logical zero meaning that the requirements of the normal applications program again apply EOH calculates the supply temperature setpoint Y1 in accordance with the heating curve Parameter P18 provides the curvature Parameter P19 provides the slope which is displaced in accordance with the room temperature setpoint including the increase See the HCA Icon section for further explanations of the heating curve Cool Down Opt
117. eeneeeeeenaeeeeeeeeeeeeneeeesenas 186 Operating Pump SWitChovel c cccccececeeceeceeeeeceeeeaeaeeeeeeesecqneaeeeeeeeseesenaeeeeess 192 Optimized Start Stop zs nrinig iaaa 196 Positioning Signal Limitation 2 0 0 ee ee eeeeeeeeeneeeeeeeeeeeseneeeeeeaeeeeseeeeeeeneeeeeeaas 197 Setpoint Adjustment s e ie eea a a ee e e aa aia eA 200 System Regulatio Ms iai ri a iraia e adadda 203 Trend Buffer CONIO aaae ea toaa erroen ias aenea E Eee r peeceuagyeshaceecuncchcebactenteres 205 site AE SE E E E A ade ennui E E E E E T 209 E E E E E E EE 213 wild E E E A T 219 CARE CONTROL ICONS INTRODUCTION Purpose Assumptions Temperature Differentials Manual Organization This manual provides descriptions and application examples for control icons in Excel Computer Aided Regulation Engineering CARE software You use control icons in the CARE Control Strategy function The control strategy for a plant consists of control loops that monitor the environment and adjust equipment operation to maintain comfort levels For example a control loop for an air handling system can turn on a return air fan when discharge air temperature in the return air duct is greater than or equal to 68F 20C Control loops consist of a series of control icons that dictate a sequence of events Control icons provide preprogrammed functions and algorithms to implement sequences of control in a plant schematic Examples of control icons include a Propo
118. elect All DIFT RET_AIR_TEMP 4S 6 Click OK to accept the formula and close the dialog box 7 If in the Control Strategy connect the MAT icon to the appropriate icon See the Connection of the MAT Icon to a Control Icon procedure for details P3 Proportional constant Td Purpose Formula Procedure Linear Equation LIN Dialog Box Set up a linear function for example to weight the values of multiple sensors LIN a1 x1 a2 x2 a7 x7 The coefficients a1 through a7 are parameter entries x1 through x7 are user addresses They can be flags or analog points pseudo or physical 1 Click LIN RESULT The linear equation dialog box displays LINEAR a1 x1 a2 x2 4 a x al sja xl OA_TEMP a2 j x2 RET_AIR_TEMP ns cd 2 Select a point for the x1 through x7 values function variables Use one of the following methods e Select a user address from the physical point bar in the Control strategy or Switching logic window 107 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Type a user address name e Select a pseudopoint In the Control strategy function click the desired pseudopoint in the pseudopoint bar at the bottom of the window In the Switching logic function Click menu item Software points The list of pseudopoint types displays Click the analog type The Create select software point dialog box displays Clic
119. enthalpy and return air enthalpy in full air conditioning systems or on the basis of outdoor air temperature and return air temperature in partial air conditioning systems The following conditions apply Gradient of the characteristic curve is positive if hAL gt hAbL in full air conditioning systems tAL gt tAbL in partial air conditioning systems Gradient of the characteristic curve is negative if hAL lt hAbL in full air conditioning systems tAL lt tAbL in partial air conditioning systems Where hAL is outdoor air enthalpy hAbL is return air enthalpy tAL is outdoor air temperature tAbL is return air temperature X1 or X2 42 CARE CONTROL ICONS ALPHABETIC REFERENCE Module 4 Temperature Recovery This module calculates a continuous positioning signal YT from the basic temperature controller X1 If there are no limitations that is P4 is zero the module outputs a positioning signal YT from 0 to 100 percent working range P3 e g 30 If there is a limitation the module converts it into a maximum limitation with mixed air damper operation and into a minimum limitation with regenerative transfer operation Depending on the position of the characteristic curve from Module 3 the positioning signal is direct acting or reverse acting ECO uses the maximum limit for the direct control of mixing return and fresh air dampers that operate with one motor 43 74 5577 10 US EN2B 0184 GE51 R0
120. er example 164 Setback operation 118 Setpoint adjustments 198 Setpoint Reset example 13 Setpoints to maintain predetermined comfort band 171 Shape variation in value 152 Shed restore value 79 Sliding Window algorithm 73 SQRT function 102 Start stop ventilation and air conditioning 113 Starting stopping the air conditioning 130 Starting stopping the heating 116 Startup user address 211 Subtract DIF 166 Sum multiple analog input values 8 SWI control icon 9 Switch an analog value 9 Switch HVAC systems on and off 30 Switch on wait time 81 System regulation 201 T Taylor series 102 Temperature differentials 1 Time program optimization 138 Time program preparation 137 Time program switch point 138 Totalizer Input Reset 83 Totalizer XFM 61 Transfer a value 24 Trend Buffer Control 203 Trend logging information 169 TW linear characteristic 200 U Up Down Ramp 59 221 INDEX V Variable time preheat 122 W Weight values of sensors 108 WIA 167 WIA and global points 170 Write WIA 167 Write value to attribute 167 X XFM 49 XFM 35 algorithms 73 XFM 35 description 69 XFM 36 1 description 83 XFM 36 1 general functions 91 XFM 36 1 Priority Group assignment 87 XFM 36 1 R Rotational Load Switching 89 XFM 36 1 S Sequential Load Switching 87 XFM 36 1 S R Switching Behavior 87 XFMs in custom control strategies 50 Y Year round compensated space set
121. er goes higher when the sensed value goes smaller The CARE PID operator is reverse acting 146 CARE CONTROL ICONS ALPHABETIC REFERENCE controlled variable X disturbance Z time Reverse PID Operation To reverse the working direction of the PID exchange the inputs for the controlled variable and the reference variable Or connect the PID output to the input of a DIF control icon and assign 100 to the X1 parameter PID With ECO You can use PID to provide a temperature input to an ECO icon for basic temperature control You can also use a PID to calculate a humidity input See the Economizer ECO section 147 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS PID Plus PID Plus Function 1 0 Dialog Box Inputs Output Internal Parameters Proportional band Xp Derivative time Tv 74 5577 10 US EN2B 0184 GE51 R0404 Europe Proportional Integral Derivative controller that regulates an analog output based on two analog values one is a controlled variable the other a reference variable and operating parameters This PID has the same behavior as the previously defined PID with an additional digital input The digital input XD enables and disables integral control action When this input is zero integral control is disabled and the integral sum is reset This input must always be connected PID controller Two analog inputs
122. eration Off Time Off Time Heating only Heating and Cooling Cooling only Room Temp Comfort Range Comfort Range Four analog inputs X1 through X4 required where X1 Highest zone temperature The highest zone temperature indicates a need for cooling For example X1 can be a selection of the maximum of all room temperatures in a zone MAX icon X2 Lowest zone temperature The lowest zone temperature indicates a need for heating For example X2 can be a selection of the minimum of all room temperatures in a zone MIN icon X3 Fan status 1 off 2 fast for two speed fans 3 slow for single speed fans X4 Setpoint You can enter the X1 X2 and X4 input values as parameters engineering unit index number and value for each parameter 30 CARE CONTROL ICONS Outputs Internal Parameters Comfort range Maximum off time Minimum off time Cycle time Radio buttons Parameter Number Descriptions ALPHABETIC REFERENCE Two digital outputs where YD1 Single stage fan speed 1 0 off 1 on YD2 Two stage fan speed 2 0 slow 1 fast These outputs can also be heating system pumps Deg F x 30 Min Comfort range J Maximum off time Minimum off time Cycle time Heating Cooling Heating and Cooling With 2 Speed Fan Without 2 Speed Fan Cancel Number type Decimal Unit F Deg Default 5 F Deg 10 0K Range
123. ering unit table ID and value for the W variable instead of connecting W to a point or control icon For engineering unit enter the corresponding index number Appendix E Engineering Units in Excel CARE User Guide 74 5587 US EN2B 0182 Europe lists engineering units and their index numbers If a variable does not have editing fields next to it you cannot type values for a connection you must connect it to another icon or a point Excel CARE User Guide 74 5587 US EN2B 0182 Europe Control Strategy chapter for procedures to place and connect control icons Control Icon Table Function Name Add Analog Switch Average Cascade Cascade with additional digital input and parameter registers Changeover Switch Cycle Data Transfer Digital Switch Duty Cycle Economizer Event Counter Fixed Applications These chapter lists icons alphabetically by function name and includes function names symbols and short descriptions Function name is usually the same as the icon name There are exceptions such as 2PT which is functionally a Digital Switch Control Icon Icon Name Description ADD Sum multiple analog input values 2 through 6 Pa SWI Switch an analog value depending on a digital value for example if digital is O analog is 2 if digital is 1 analog is 1 AVR Calculate the average of multiple analog inputs 2 through 6 CAS Cascade controller that acts
124. es and end it with double quotes so that software knows it is a user address You can type the quotes or click them in the calculator pad When you add a point by clicking it in the physical or software point bar the Math Editor automatically adds the quotes to the user address name e Type a value for example 23 or 10 Or click the desired numbers in the calculator pad in the Math Editor dialog box Rules The value can have a maximum of seven digits to the left of the decimal and three digits to the right of the decimal 9 999 999 999 The value must be positive To enter a decimal you must use leading zeros for example 0 5 To enter a negative number enclose it in parentheses and subtract it from zero For example for a negative 2 multiply 2 by a negative 1 Y 2 0 1 e Select a pseudopoint In the Control strategy function click the desired pseudopoint in the pseudopoint bar at the bottom of the window In the Switching logic function Click menu item Software points The list of pseudopoint types displays Click the analog type The Create select software point dialog box displays Click the desired point from the list Click OK The pseudopoint address displays in the formula Click End in the Create select software point dialog box to close it e Delete or change portions of the formula using one of the following techniques Highlight a portion of the formula and delete it type over it or
125. esired attributes You must select at least one attribute See the Attributes Table for a list of which attributes are available for each point type Attribute Selection Attribute 1 Accumulated Runtime Attribute 2 LURITE BAL ITA Attribute 3 No Attribute KI Attribute 4 No Attribute Attribute 5 No Attribute tL 1 Select desired attributes by clicking the down arrow to display options and then clicking desired attribute Click OK to save selections and close the dialog box Cancel closes the dialog box without saving selections RESULT The dialog box closes The control strategy work space displays 2 Click the RIA icon to display the secondary RIA I O dialog box 157 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Input Output Internal Parameters RIA Operation Diagram RIA Attributes Table 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Connect output attributes to other control icons or points as desired NOTE Analog and Digital outputs can only have one icon connected Therefore if another icon is connected to an input the RIA cannot be connected For example you can connect an attribute to a pseudopoint or flag that switching logic could use O AD2 LI A3 Ria ADR amp O a4 O as Any point ADR One through five point attributes The number of outputs matches the number of attributes selected Example pseudo points c
126. eter 0 e A CS 22 23 24 25 ALPHABETIC REFERENCE Em 0 0 Integer Po Integer Type abbreviations Display indicates the program s internal calculated values Comm is used by a commissioning engineer to set or adjust specific plant values Progr can be preset by the programming engineer using CARE and revised by the commissioning engineer Int is an internal parameter that you must not modify XFM 35 Algorithms XFM 35 provides three measurement and calculation algorithms Sliding Window Ideal Curve and Extrapolation that you can select as required To select an algorithm set Parameter P9 to the values 1 Sliding Window 2 Ideal Curve or 3 Extrapolation Each algorithm measures the current power consumption compares it to a power limit Parameter P13 or P14 and calculates a power value for the XFM 36 1 S R single stage load control programs A positive power value switches ON a load A negative value switches OFF one or several loads The maximum switch on parameter P5 limits the power value from an algorithm Each algorithm samples the gradient of energy used and calculates the power to be switched Sampling occurs 10 times per measurement interval or window time frame Parameter P10 The Sliding Window algorithm provides a simple but useful control of the power peak without the need for synchronization pulses The Sliding Window algorithm is used primarily in the US Using a sliding time axis the a
127. f When temperature is between the setpoint and the upper comfort limit DUC calculates cooling off time toff YD1 or YD2 0 as t t max min t _ X1 UCL t off X4 UCL min 30 min 3 min 73 75 3 min 68 75 10 min 45 sec DUC switches the cooling system off 10 minutes 45 seconds before the end of the cycle The following diagram illustrates off time calculation for cooling systems 34 CARE CONTROL ICONS ALPHABETIC REFERENCE X1 UCL zone temperature Heating Cooling System Off Time Calculation In combined heating cooling systems if room temperature is outside the comfort range DUC does not switch off the system If room temperature is within the comfort range DUC calculates two off times One calculation is the same as for heating only systems The other calculation is the same as for cooling only systems DUC selected the lower of the two off times for actual off time duration For example the off time for the heating system example is 14 5 minutes and the off time for the cooling system example if 10 minutes 45 seconds So DUC switches the heating cooling system off 10 minutes 45 seconds before the end of the cycle time tmax toff tmin LCL X2 X4 X1 UCL zone temperature 35 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Economizer ECO Function I O Dialog Box Inputs Output
128. fresh air temperature controller The advantage of this arrangement is that the master controller and secondary controller can each adapt to their own control sections 12 CARE CONTROL ICONS Setpoint Reset Example ALPHABETIC REFERENCE Om A Xd K Y wel y w room setpoint The next diagram illustrates the use of a Cascade controller to perform the same functions The CAS controller contains two PI controllers in a cascade arrangement The X variable reads the master controlled variable room temperature The XH variable reads the fresh air temperature auxiliary controlled variable The W variable is the room temperature setpoint reference variable room setpoint This example shows how to use cascade control to reset a discharge air controller setpoint up to 95F 35C if room temperature falls below its setpoint to 65F 18C The submaster controls the controller setpoint The output of the master controller resets the setpoint of the submaster up and down Y XH X Parameters for the master controller are 13 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Min output 68F 20C Max output 95F 35C W 65F 18C X ROOM_TEMP Parameters for the cascade controller are Min output 0 percent Max
129. g curve 119 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS room setpoint from time program optimization YES normalZ operation D w ss L a B foi v 1 normal setback i operation operation 4 total setback AP non optimized approach optimized approach of switching point of switching point In the figure the triangle notes refer to the following text 1 Supply temperature from heating curve 2 Supply temperature 32F 0C 3 Maximum of supply temperature during rapid preheating Heating Optimization WITHOUT Room Sensor During preheat time EOH works with a fixed prescribed increase P6 of the room temperature setpoint and varies the preheat point as a function of outdoor air temperature With a minimum outdoor air temperature of 32F the preheat phase begins 2 hours before reaching the corresponding switch point in the Time Program If the outdoor air temperature X2 is equal to the room temperature setpoint X3 including the increase P6 the preheat point is not advanced If the outdoor air temperature is between these two points the advance tyy of the preheat point is calculated on the basis of the following linear equation tvv P8 X3 X2 P8 In other words preheat time advance is equal to the negative of preheat time divided by room temperature setpoint and multipli
130. he negative cycle transition from STARTUP occurred at least 60 seconds before that is STARTUP must be zero for a minimum of 60 seconds 215 74 5577 10 US EN2B 0184 GE51 R0404 Europe APPENDIX B STARTUP USER ADDRESS CARE CONTROL ICONS 74 5577 10 US EN2B 0184 GE51 R0404 Europe OR The Time Program or application program requests the second stage AND The second stage was already on These two conditions prevent the second stage from switching off immediately after switching on AND The negative cycle transition from STARTUP occurred at least 60 seconds before that is STARTUP must be zero for a minimum of 60 seconds Switching action summary After power returns nothing happens for 20 seconds that is both ventilator stages remain switched off even if the Time Program requests a stage After the 20 second delay there is another delay time of 60 seconds This time varies ventilator switch on in case there are multiple ventilators When the 60 second time delay expires there are two cases 1 2 The Time Program requests the first stage The first stage starts The Time Program requests the second stage The first stage starts for 30 seconds to bring the ventilator into rotation After a delay of 30 seconds the first stage switches off and the second stage switches on 216 CARE CONTROL ICONS APPENDIX B STARTUP USER ADDRESS When switching from the second stage back to the first stage both stages swi
131. he second ramp equivalent to the maximum value of the first ramp Yb 1 P4 P8 Yb 2 the maximum of the second ramp P9 Slope of the second ramp Formula _ Yb 2 Ya 2 9 for Xa 2 Xb 2 Xb 2 Xa 2 P10 Intersection of the second ramp with the Y axis _ Yb 2 Ya 2 P10 Ya 2 Weyer for Xa 2 Xb 2 P11 Xb 1 maximum X value of the first ramp The following diagram shows the parameters for the RAMP control icon P8 4 5 X P9 P10 P4 P7 X P5 P6 P3 Oo i b rad A P11 xX Pio H J J P6 f When you change the minimum and maximum X and Y scale values RAMP adjusts minimum and maximum values for the curves so that they are not outside the overall X and Y ranges For example assume an application has the following values 155 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Y scale ranges from 0 through 100 Ymin through Ymax X scale ranges from 0 through 50 Xmin through Xmax 2 Curve 1 X scale ranges from 20 through 40 Xa 1 through Xb 1 Y scale ranges from 25 through 80 Ya 1 through Yb 1 Curve 2 X scale ranges from 65 through 85 Xa 2 through Xb 2 Y scale ranges from 80 through 55 Ya 2 through Yb 2 If you increase the minimum on the Y scale from 0 to 30 RAMP changes the Y scale minimum for Curve 1 from 25 to 30 so that
132. hould stop as soon as possible to save energy This application uses the EOV MAT and SWI icons and may use the ZEB icon to determine operating mode heating or cooling Use the MIN and MAX icons to limit the range of the output value sent to a positioning signal Use the SWI DIF and MAT control icons to control the setpoint of a actuator depending on time of day This application regulates a partial air conditioning system with mixed air dampers an air heater and an air cooler Setpoint management using the ZEB statement followed by PID controllers regulates this system This application uses the SWI ZEB MAX MIN PID and AVR icons In many cases trend logs include points whose values change frequently Over a lengthy time interval these frequent variations in signal exhaust the capacity of the trend buffer You can use CYC and SWI to control output to the trend buffer The following table cross references the icons used in these applications 179 74 5577 7 US ENOB 0184 GE51 R0701 Europe EXAMPLES CARE CONTROL ICONS ADD AVR CYC DIF EOV EVC MAT MAX MIN_ PID RIA SWI WIA ZEB Attenuator X X X Average Value X X X X Calculation Floating Limits and X X X Alarm Suppres sion Operating Pump X X X Switchover Optimized Start Stop X X X X Positioning Signal X X Limitation Setpoint Adjust X X X ments System Regulation X X X X X X Trend Buffer X X Control
133. how to use EOV with other icons for a complete optimized system 131 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Internal Parameters CARE CONTROL ICONS Heating Case Lowest pre heat time for opt pre heat high speed pre heat factor Optimum stop OAT low limit for opt switch off Optimum stop factor Cooling Case Lowest cooling time for opt cooling high speed cooling factor Max outside temperature for opt switch off Optimum stop factor Factor adaption Enable Disable New Start Enable Heating Case Lowest preheat time for OPT preheat High speed pre heat factor Optimum stop OAT low limit for opt switch off Optimum stop factor Cooling Case Lowest cooling time for opt cooling 74 5577 10 US EN2B 0184 GE51 R0404 Europe P3 P4 P5 P6 P7 Units Min Default 0 Range 0 to 120 This is the minimum warm up time for optimum start This specifies a minimum amount by which to advance the scheduled start time in heating mode regardless of the actual optimum start calculation Units Min F Deg Default 10 Range 0 to 100 Warm up rate for optimum start When the plant is turned on for heating this value is the number of minutes it takes to increase room temperature by 1 degree This value can be automatically adjusted if the adaptation option is enabled Units Deg Default 50 Range 15 to 75 Minimum outside air tem
134. ime than 36 1 XFM 35 controls a maximum of three priority groups of loads Each priority group can contain up to 50 single stage load programs XFM 36 1 36 1S and 36 1R connected in a loop Minimum ON and OFF times for proper switching operations e Automatic switch on of loads after the maximum OFF time has elapsed e Real time display of important parameters e Automatic detection of switching procedure rotational or sequential for XFM 36 1 only e Feedback input RM for correct measurement of minimum ON OFF times or additional load control by other modules e Manual operating mode of load switching if desired Remote control of a load via the C Bus if desired After you place an XFM 36 1 36 1S or 36 1R in a control strategy bring up its I O Dialog box De gg Je T Ost RM O XFM 36 1S and 36 1R I O dialog boxes are the same except for the title Inputs apt Abbrev Type Comment 1 Power to switch 2 Feedback message VA Power switching value from previous XFM 36 1 or from XFM 35 RM DI 1 12 XF 523 Load status feedback or additional load or 1 60 XF 528 control by other program 83 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Outputs output Abbrev tyre Commen 1 Power to switch VA Power switching value to next XFM 36 1 or to XFM 35 2 Load stage DO 1 6 XF Load switching command ON OFF 524 Output to a relay or other modules for e
135. imization WITHOUT Room Sensor In cool down optimization EOH only looks at the outdoor air temperature to define the time point for early setback The maximum advance of the switch off point is 2 hours EOH advances the switch off point of the Time Program by this time interval when the momentary outdoor air temperature X2 corresponds exactly to the room temperature setpoint of the Time Program X3 If outdoor air temperature is less than the limit defined by Parameter P7 no early switch off occurs Between these two points EOH uses the following linear interpolation to advance switch off point tyv tyv 120 min X2 P7 X3 P7 The following diagram illustrates this action N x x lt QO oO Q n gt oO outdoor temperature As an example given the following values Outdoor air temperature X2 43F 6C Minimum outdoor air temperature P7 32F 0C Momentary room temperature setpoint X3 Time Program value 68F 20C tyv 120 min 6 0 20 0 tyy 36 min During this total setback phase EOH transmits a 1 to output YD3 This value overwrites the supply temperature setpoint from the normal application program by flow temperature setpoint Y1 from EOH CAUTION During the total setback phase EOH transmits a supply temperature demand of 32F 0C to Y1 You must implement any freeze protection functions required for the total setback phase outside of EOH 122 CARE CONTROL ICO
136. imum positioning signal change of the controller The proportional ranges Xp of the controllers are as follows Heater controller Xp Heating reset range Cooler controller Xp Cooling reset range Damper controller Xp P13 100 20 100 20 P13 Where P13 is the mixed air reset range With the controller for the mixed air dampers there is also a minimum limitation of the positioning signal to 20 percent to guarantee a minimum fraction of outdoor air In this example the Y3 Y4 and Y5 outputs from ZEB provide the fresh air setpoints for the heating cooling and zero energy cases pure damper operation These outputs serve as reference variables for the PID controllers The fresh air sensor provides the controlled variable On the controllers for the cooler and the dampers the controller inputs for the controlled variable and reference variables are deliberately exchanged to reverse the effects of the controller 203 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Air Heater Controller The ZEB heating setpoint Y3 output connects to the controller for the air heater valve as the reference variable If the ZEB statement initiates heating YD1 1 the positioning signal from the controller reaches the valve drive If YD1 equals zero the controller is overridden and the valve is closed Cooler Controller The ZEB cooling setpoint Y4 out
137. ine 1 Table 1 3 000 1 72 4 Comparison Value 2 of Line 1 Table 1 55 000 1 73 5 Hysteresis of Line 2 Table 1 3 000 1 74 6 Comparison Value 2 of Line 2 Table 1 55 000 1 75 7 Output On Delay Table 1 22 000 Sec 1 76 8 Output Value Table 1 1 000 1 Reference Numbers Parameter Changes Alternative Printout 74 5577 10 US EN2B 0184 GE51 R0404 Europe The Parameter file and index numbers are the identifiers for the parameter when you use off line editors such as the XI584 or XI581 2 Operator Terminals to read and modify controller files CAUTION DO NOT use the X1584 or XI581 582 terminals to change Internal use parameters Description column If you change these parameters the application program in the controller may malfunction and cause system damage If you change parameters in the TXT file it has no affect on the other CARE data files This file is just an ASCII listing To change parameters in the actual controller files use the related CARE function for example control strategy or switching logic Live CARE option under Controller Tools menu or the X1584 or XI581 582 operator terminals When you use the Parameter List function you can print the parameters for all controllers in a project or just one controller As an alternative you can use Windows to print all the parameter files for the site This procedure may be faster than remaining in CARE and selecting and reselecting various contr
138. ined value of Tn stored in P8 Parameters P5 and P6 serve as the minimum and maximum limits respectively of the setpoint assignment to the cascade controller CAS Plus Example The following diagram shows how CAS Plus operates in a CARE setup Override Manual l enable component switch on off switch Enable comp Ji STARTUP Ta 15min_ 0 Override _enable 0 Manua come 4 room setpoint_ Enable_ _comp STARTUP There is an automatic switchover from P control during the start up phase to PI control during normal operation CAS Plus inputs are 19 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS X is the room temperature master controlled variable XH is the supply air temperature auxiliary controled variable W is the room temperature setpoint reference variable The switching table sets the digital software point Enable_ _comp according to the following rules e Enable the component 15 minutes after the negative transition of user address STARTUP Before this transition the main and auxiliary controllers act as P controllers because the component is switched to zero by the XD digital input in CAS Plus e A manual override in the second column The override function is active if Override_enable is 1 enabled by manual switch If override is enabled a user can switch the component on a
139. input to EVC and stored temporarily in a flag n The MAT icon contains the averaging formula Average n oat_72h OAT n 1 Where Average is the actual average value calculated oat_72h is the OAT average over 3 days OAT is the momentary OAT from the OAT sensor n is the weighting factor This new average value replaces the old OAT average over 3 days as soon as the output of the CYC statement delivers a high signal During the switch off duration of CYC average OAT is in a self hold circuit The SWI icon implements this function The switching table implements the maximum limitation of the weighting factor n 422 The table resets n to 422 if it exceeds 422 In addition the CYC input must be set to logical 1 so the impulse generator is released The output XD2 of EVC is set to logical 0 If this input becomes 1 a reset 184 CARE CONTROL ICONS EXAMPLES is triggered on EVC that causes the calculation of the average value to start again The new start can be triggered through a manual switch cabinet by a check of the system variable STARTUP A switching table can implement the check of the STARTUP point When STARTUP 1 reset EVC to 1 The controller sets STARTUP to zero during a network failure After the return of the network STARTUP is 1 again The switching table enables a new start of the OAT calculation after a network failure NOTE If the STARTUP variable triggers a reset of EVC ensure that STARTUP
140. int A few datapoints are not used for exchanging data among the two XFMs ID____ Tariff for example can be commanded to allow switching between demand limit setpoints ID___ Man_load_shed is a datapoint that can be set up as an alarm point to warn the user that all sheddable loads have been shed and the power limit is still being exceeded The user should manually shed other loads to avoid demand charges The datapoints are explained in the XFM sections Because synchronizing the reads and writes of the datapoints is very important to the correct operation of a power demand program all XFMs of the power demand program must reside in one controller To switch loads in other controllers the St output command and the RM feedback input if used should communicate globally to those points in the other controller The following diagram shows the connection of XFM 35 and multiple XFM 36 1 S Rs where the first XFM 36 1 No 1 in priority Group 3 controls a load connected to another controller via user addresses St1 and RM1 Communication between the local and global user addresses is via the C Bus Zi Totalizer Syc Pot Po2 Po3 Stage 1 Po XFM 36 1S D Poa Po XFM 36 1R D Po i XFM 36 1 ell St No 1 O RM St No 1 O RM No 1 O RM Po XFM 36 1S O Po Po XFM 36 1R O Po Po XFM 36 1 O St No 2 RM St No 2 O RM St No 2 O RM a XFM 36 1R O t 7 XFM 36 1 al No 50 OO RM No 50 O RM Group 1 RM 1 Group 2
141. ion for more details Also see the PID section for more details on PID operation Cascade controller Three analog inputs where X Master controlled variable XH Cascade or auxiliary controlled variable W Reference variable also known as setpoint You can enter the reference variable as a parameter engineering unit index number and value One analog output Y Master Controller Proportional band Xp Integral action time Tn Sec Min output casc controller oo Max output casc controller Cascade Controller Proportional band Xp eo Integral action time Tn Sec Minimum output oo Maximum output cnet 11 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Master controller Cascade controller Parameter Number Descriptions Cascade Operation 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Proportional band Xp Number type decimal Unit same as the controlled variable X Default 2 0 Range 0 through 100 0 Proportional band value is equivalent to the throttling range Integral action time Tn Number type whole number Unit seconds Default 1000 sec Range 0 through 7200 sec If Integral action time is less than 15 seconds integral control is disabled Minimum output Number type decimal Unit same as the cascade controlled variable XH Default 0 0 Range 0 through 100 0 Maximum output Number type decimal Unit same as th
142. ions are introduced into the calculation at the beginning of a measurement interval after receiving a synchronization pulse After one or more parameters P5 to P18 have been modified Parameter P8 must be set to 1 This tells the calculation algorithm that parameters have been modified to include them in a coordinated manner When the time arrives to include the modifications the calculation algorithm writes the value 2 to Parameter P8 registers the modifications and resets P8 to 0 to show that the modified parameter values are now in use Parameter P8 can be used as a Test Board parameter by setting it to 3 In this operating mode the maximum switch on power value P5 is transmitted to the loads every calculation interval sample until all loads are switched on To return to the normal operating mode the user must reset the Parameter P8 to 0 The following table lists the parameters used for the parameter modification at run time function E om eon Ra o Number Type Brief Description Range Value Comm SafetyMargin o o w Test Board Parameter Change set to 1 when changing any other parameters Comm Measurement Algorithm 1 2 3 3 Integer 1 Sliding Window 2 Ideal Curve 3 Extrapolation 10 Com Measurement Interval Window Size 1 7200 min Power Limit 1 0 108 10000 kw Comm Switch on Wait Time 0 240 sec 74 5577 10 US 80 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Freeze Time Fun
143. ir conditioning system P5 Mixed air dampers 1 or heat recovery wheel 0 P6 Min FA wheel speed P7 Heating costs less than cooling costs 1 Heating costs greater than cooling costs 0 37 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS ECO Operation The following diagram illustrates the ECO function within a control loop temperature basic controller signal revolution Yoooling Yheating ECO YHR Yhumidity Ydehumidity signal revolution humidity basic controller The ECO control icon is composed of six internal modules Heating or cooling need Humidify or dehumidify need Characteristic curve positioning Temperature recovery need Moisture recovery need Energy selection logic e 74 5577 10 US 38 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE The following diagram illustrates the relationships between the modules 1 demand heating cooling heating i kx R 0 kx y cooling temperature controller Pi P3 P4 X3 outdoor temp enth X4 exhaust temp humidity Xe controller 4 demand heat recovery 3 position a of curvature 6 selection logic MIN MAX Y 5 demand humidity recovery MEP TIE 2 demand for humidifying or dehumidifying 39 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Module 1 H
144. is reset to zero after running through the first cycle See Appendix B fora description of STARTUP reset 185 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS Floating Limits and Alarm Suppression Purpose Control Icons Example 74 5577 10 US EN2B 0184 GE51 R0404 Europe Fixed alarm limits for sensors such as a supply air sensor are not meaningful so it is useful to adapt the limits to a setpoint within an adjustable interval It is also often useful to suppress nuisance alarms Use the WIA ADD and DIF control icons The following diagrams illustrate a typical equipment setup and desired floating limits The dmax value in the floating limits diagram is the distance of the upper alarm limit from the setpoint and dmin is the distance of the lower alarm limit The minimum and maximum limits remain fixed values necessary for frost protection fan status supply sensor 186 CARE CONTROL ICONS EXAMPLES setpoint 187 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS In addition to floating limits the system should suppress all alarms as long as the supply air fan is off because the supply air sensor cannot measure correct values when the fan is off The following diagram illustrates both alarm suppression and floating limits supply air temperature min limit 1 fan status alarm status E alarms suppressed E point in alarm 7
145. is function are to be used as inputs for another controller 172 CARE CONTROL ICONS Internal Parameters Comfort range J Min cooling setpoint Max heating setpoint Min mixed air setpoint ZEB Load reset mode Room humidity limt Comfort range P3 Minimum cooling setpoint P5 Maximum heating setpoint P6 Minimum mixed air setpoint P7 ZEB Load reset mode P8 Room humidity limit P10 Heating reset range P11 Cooling reset range P12 Mixed air reset range P13 Radio buttons ALPHABETIC REFERENCE 4 000 FDeg Heating reset range F Deg oF Cooling reset range F Deg F Mixed air reset range F Deg F Relative Humidity Absolute Humidity With Humidity Sensor Without Humidity Sensor Cancel Number type decimal Unit F Deg Default 4 0 F Deg 2 0K Range 0 through 50F 0 through 30K This value defines the width of the heating cooling and zero energy ranges The width of each range is two times this value All ranges are equally wide The zero energy range is located symmetrically around the setpoint X5 The cooling range is located immediately above the upper limit of the zero energy range The heating range is located immediately below the lower limit See the Operation diagram later in this section Number type decimal Unit Degrees Fahrenheit Default 55F 13C Range 40 through 80F 5 through 27C This field is intended for use as the lowest allowable discharge air setpoint duri
146. is in cooling operation XD5 0 EOV optimizes this switch point that is EOV shuts down the system before reaching the switch point so that energy is saved EOV calculates shutdown advance time TyKA the same way as EOH using a linear characteristic curve EOV shuts down the system with the maximum time advance if OAT is equal to the room temperature setpoint and room temperature In this case EOV guarantees that the room temperature setpoint is closely followed until the switch point is reached in spite of early shutdown as the heat losses from the building are zero because of OAT EOV shuts down the system without advance when the actual OAT is greater than or equal to the maximum OAT Parameter P9 Between these limits EOV calculates advance time TyKA as follows t X4 P9 VKA 120 min ORENS torr X2 P9 Where tcorr X2 X3 P10 In other words the correction factor equals setpoint minus room temperature multiplied by the optimum stop factor The correction factor changes the slope of the previously defined characteristic curve as a function of the control difference If room temperature equals room temperature setpoint the characteristic curve remains unchanged If room temperature is less than room temperature setpoint the characteristic curve is steeper and the system is shut down earlier If room temperature is greater than room temperature setpoint the characteristic curve is less steep and the sy
147. ith or without adaptation With Adaptation P1 Heating curve curvature P2 Heating curve slope P3 Heating curve slope limit P4 1 if adaptation is selected Without Adaptation P1 Heating curve curvature P2 Heating curve slope HCA is a weather compensated discharge air temperature calculator that is software assigns discharge air temperature setpoints to temperatures by means of a heating curve If a room temperature sensor is connected the controller can adapt this heating curve automatically Control example DA PID Discharge air setpoint The controller uses parameters to performs several tasks to ensure economic heating Apart from the basic functions it performs to control the desired temperature according to a time program the controller also ensures that certain temperatures are maintained to protect the system or building Default settings for each parameter are based on years of experience to ensure this safe operation Adjustments are only necessary in very special cases Heating Curve The weather compensated controller requires a heating curve for each heating circuit to determine the correct discharge air temperature setpoint according to outdoor air temperature The heating curve graph indicates the relationship between outdoor air temperature and associated flow temperature 110 45 35 3 0 2 5 Discharge Air Temperature Outdoor Air Temperature 95 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALP
148. itten to or read by other XFMs Create datapoint points by clicking on the Datapoint button after the XFM has been displayed CARE CONTROL ICONS INTRODUCTION XFM ahccalla csd The following figure shows how two XFMs could be wired by a datapoint XFM 1 XFM 2 VD Demand1 A pseudo digital point Demand1 connects to both XFM 1 and XFM 2 by the use of datapoints After clicking on the datapoint button the following screen appears Datapoints From XFM ahcca0la csd Type XFM Pointname CARE User Address CilgD emand PumpE xercise Planth ode HumidM ode OaTempAyvg There are two methods of creating the datapoints One method is by clicking the Set command to automatically create the pseudopoints with the user address as shown in the dialog box The other method is to click an existing point pseudo or physical and then click the point in the dialog box such as ClgDemand This selection locates the subject user address Demand 1 next to the desired datapoint To connect the datapoint to that user address click OK 5 74 5577 9 US ENOB 0184 GE51R0703 Europe INTRODUCTION CARE CONTROL ICONS Datapoints From XFM ahccaOla csd CARE User Address XFM Pointname Demand CilgD emand PumpE xercise PlanthM ode Humid ode OaTempAvg For detailed information see XFMs section in the CONTROL STRATEGY chapter of the CARE USER GUIDE 74 5577 10 US EN2B 0184 GE
149. k the desired point from the list Click OK The pseudopoint address displays in the formula Click End in the Create select software point dialog box to close it RESULT User address displays in the dialog box 3 Enter values for the a1 through a7 coefficients in the editing fields Enter as many as there are user addresses for the x1 through x7 fields 4 Click OK Or to close the dialog box without saving click Cancel RESULT If you click OK the mathematical editor dialog box displays with the formula Example Math Editor 5 Click OK to accept the formula and close the dialog box 6 If in the Control Strategy connect the MAT icon to the appropriate icon See the Connection of the MAT Icon to a Control Icon procedure for details Parameter Number Descriptions P3 Coefficient a1 P4 Coefficient a2 P5 Coefficient a3 P6 Coefficient a4 P7 Coefficient a5 P8 Coefficient a6 P9 Coefficient a7 LIN Example If more than one sensor is in a room not all the measured temperatures are equally relevant to room comfort You can use the LIN function to weight the values of the sensors In this example there are three sensors with the following weights User Address Weight Sensor_1 70 percent Sensor_2 20 percent 74 5577 10 US 108 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Sensor_3 10 percent Set up the LIN function with the following values a1 0 7 x1 Sensor_1 a2 0 2 x2 Sensor_2 a
150. l parameters dialog box is equal to 1 ZEB 2 Heating control or 4 Heating and cooling the application also includes heating setpoint management as follows If the zone temperature falls below the zero energy range ZEB implements a linear release of the heating energy through a continuous increase of the heating setpoint Y3 The minimum zone temperature X2 is the determining factor for the release of heating and the calculation of the heating setpoint Y3 Y3 P6 if X2 lt X5 3 P3 This relationship means that the maximum heating setpoint P6 is demanded when the lowest zone temperature is at or below the lower end of the heating range Y3 P6 P11 if X2 X5 P3 This relationship means that the maximum heating setpoint P6 minus the heating reset range P11 is demanded when the lowest zone temperature just falls below the zero energy range P11 Y3 X2 X5 3P3 P6 2P3 if X5 3P3 lt X2 lt X5 P3 If the lowest zone temperature is in this range ZEB enables heating that is it assigns 1 to YD1 Example Maximum zone temperature X1 68 Minimum zone temperature X2 61 Average zone temperature X3 66 Comfort range P3 4FDeg Max heating setpoint P6 95 Heating reset range P11 27FDeg 27FDeg Y3 _ 61 68 3 4FDeg 95 159 0 2 4FDeg ZEB Dehumidification When the ZEB Load reset mode in the internal parameters dialog box is equal to 1 ZEB 3 Cooling
151. la as desired In the Switching logic work space click the analog input condition that is the result of a formula The Mathematical Editor dialog box displays with the formula Use the highlight and change techniques as explained in the previous procedure to modify formula as desired To use digital point information in a formula first convert the data into analog values The easiest way to do this is to connect the digital point to the XD1 input of the SWI control icon Set the X2 input of SWI to 1 00 Set the X3 input of SWI to 0 00 Connect the SWI output to an analog flag The MAT editor can use the analog flag in formulas A drawback to this method is that the analog flag is internal only and is not visible to the user Parameters exist for the square root logarithm integral differential polynomial and linear functions only The following list gives parameter numbers for the square root and logarithm functions only See the appropriate section for the other functions INT DIFT POL and LIN SQRT P1 Argument x P2 Internal parameter P3 Internal parameter P4 Internal parameter P5 Internal parameter P6 Internal parameter ex P1 Argument x P2 Internal parameter 103 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS P3 Internal parameter P4 Internal parameter P5 Internal parameter P6 Internal parameter P7 Internal parameter P8 Internal parameter P9 Internal parameter P1
152. lgorithm stores the increasing measured power value at the first XFM 35 input Zi every tenth of the window time frame 1 10 of Parameter P10 The following diagram illustrates this technique lt Measurement Interval Window Z10 Z9 ENERGY kWh Z1 12 34 5 6 7 8 9 10 11 TIME in tenths of the window 73 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS The algorithm uses the measured energy values Z4 Z410 and Z4 4 to calculate current power consumption Parameter P1 possible power consumption Parameter P4 and finally the power value to be shed or restored by the XFM 36 1 S R loads P4 minus P1 This algorithm does not use display Parameters P2 and P3 Therefore their values remain zero at run time Current power consumption P1 is calculated by taking the energy kWh used in the last 1 10 of the window Z19 Z9 and dividing by the time in hours of that 1 10 of the window t1Q tg Possible power kW consumption P4 is the average power allowed in the next 1 10 of the window t11 t10 It is determined by first calculating the remaining energy in kWh that may be consumed in the next 1 10 of the window without exceeding the demand limit setpoint To calculate the remaining energy subtract the energy kWh already used in the previous 9 10 of the window Z410 Z1 from the amount of energy allowed for a
153. ll previous loads and current if output in the group are Output ON a Sie 1 There is at least one load in the group that is OFF ID___ Peak_load Input 1 Signal to stop switching on the load Li A ic tee ID___ Shutdown V Input 1 Signal to shed the load immediately emcee ag ace 0 Signal is not active Type abbreviations IA___On_Index_P Input The greatest switch on time of all previous loads and this Output load if Output in the group if load switching is rotational The highest load number switched on in the group if load switching is sequential VD VA VA VD VD VD D VA Virtual pseudo analog VD Virtual pseudo digital XFM 36 Internal Parameters The XFM 36 1 36 1S and 36 1R internal parameters dialog box lists parameters that control program functions Later sections describe how to use these parameters depending on operation desired The table following the dialog box summarizes parameter types functions default values and engineering units The dialog box values and entering units are not necessarily the defaults Submodule Parameters xfm_36 1 csd Index Parameter Value Mapped SW Point Unit New Value Rotating i 0 000 Po_Power_to_Switch RM_Input_Feedback New Unit St _Output_Stage Minimum_On_active Minimum_Off_active Maximum_Off_expire Switch_On_Index Switch_Off_Index Minimum_On_Time Minimum_Off_Time Maximum_Off_Time Mode_of_Operation Load_Number Power_of_the_Load Feedback_Op_ Mode I
154. ltage TW is greater than 4 24V the switching table is 1 and the SWI statement transmits the automatic setpoint Other SWI transmits the day setpoint Night operation also is via a switching table comparison If the TW input voltage drops below 0 25V the switching table writes a fixed setpoint of 12C 54F to the corrected setpoint Note that switching tables have priority over control loops so the night operation functions although the control loop writes the day setpoint on the corrected setpoint When defining the TW input you need to define a linear characteristic curve of 0 through 10V 202 CARE CONTROL ICONS EXAMPLES System Regulation Description This application regulates a partial air conditioning system with mixed air dampers an air heater and an air cooler Setpoint management using the ZEB statement followed by PID controllers regulates this system The following diagram illustrates system setup 1 enable damper ZEB X enable heating KI enable cooling I setpoint heating I setpoint cooling I setpoint mixed air 20 control control control damper cooling heating setpoint ZEB Load reset mode is 1 ZEB to receive the mixed air damper setpoint With the controllers it is especially important to ensure that the proportional ranges of the controller are set correctly When crossing the particular heating cooling and zero energy ranges the control loop must cover the max
155. mber type decimal Unit same as the cascade controlled variable XH Default 0 0 Range 0 through 100 0 Maximum output Number type decimal Unit same as the cascade controlled variable XH Default 100 0 Range 0 through 100 0 Proportional band Xp Number type decimal Unit same as cascade controlled variable XH Default 2 0 Range 0 through 100 0 Proportional band value is equivalent to the throttling range Integral action time Tn Number type whole number Unit seconds Default 1000 sec Range 0 through 7200 sec If Integral action time is less than 15 seconds integral control is disabled Minimum output Number type decimal Unit percent Default 0 0 percent Range 0 through 100 0 percent Maximum output Number type decimal Unit percent Default 100 0 percent Range 0 through 100 0 percent If W is NOT entered as a parameter P3 Xp proportional band master controller 18 CARE CONTROL ICONS ALPHABETIC REFERENCE P4 Tn in seconds integral action time of the master controller P5 Min minimum limit of the cascade controller P6 Max maximum limit of the cascade controller P7 Xp proportional band of the cascade controller P8 Tn in seconds integral action time of the cascade controller P9 Min minimum limit of the positioning signal in percent P10 Max maximum limit of the positioning signal in percent P11 Actual integral action time of the master controller in seconds If XD is zero P11 is als
156. nd off via Manual_ _Comp no matter what the status is of STARTUP See Appendix B STARTUP User Address for information on how the user address operates This application works only if STARTUP is set according to the information in Appendix B 20 CARE CONTROL ICONS ALPHABETIC REFERENCE Changeover Switch CHA Function Formula I O Dialog Box Inputs Outputs Internal Parameters Parameter Number Descriptions CHA Example Ea Pass an analog input value to one of two outputs depending on the value of the a digital input switch If XD1 0 set Y1 to X2 and Y2 to 0 If XD1 1 set Y2 to X2 and Y1 to 0 Switch outputs One digital input XD1 One analog input X2 You can enter the analog input X2 as a parameter engineering unit index number and value Two analog outputs Y1 and Y2 NOTE Ifan output is not selected that is no change in XD1 software sets the output to 0 Previous calculations are not stored None P3 Input X2 if X2 is not connected with a point Control operating hours for two continually controller pumps You can alternate between two pumps as the following diagram shows application application program for program for speed control pump switching The application programs for speed control and pump switching are control loops with one or more switching tables 21 74 5577 10 US EN2B 0184 GE5
157. nditions required in the control strategy or the switching logic is not supplied directly from one user address or a combination of more than one user address is required you can use a mathematical formula to express this condition Create formulas to modify inputs to other control icons For example if inputs are in English units for example Fahrenheit use the MAT editorto convert them to metric units for example Celsius In a switching logic table you can calculate an average temperature and use it to command points on and off e average temp O E average_temp Zone_temp_1 Zone_temp_2 Zone_temp_3 3 In a control strategy you can add 10 to a setpoint that inputs to a PID PID hig_cont_setpt Hig_setpoint 10 MAT Formula 4 See the Examples chapter in this manual for examples of MAT control icon use with other control icons Math function None The mathematical editor dialog box controls formula inputs One analog output Y You assign a user address to this output point It is the result of the formula and names the formula You cannot directly connect the output with a user address To connect the output to the software bar that is to output to a pseudopoint use an IDT operator Formula names apply only to the plant where they are defined They cannot be duplicated within the controller When you try to attach the plant software displays an error message that the name is already used and gives you
158. nds If XD1 is zero P8 is also zero If XD1 is one P8 contains the user defined value of Tn stored in P5 PID Controller if W is entered as a parameter P3 Proportional band Xp P4 Derivative time Tv in seconds P5 Integral action time Tn in seconds If you set Integral action time to zero in the internal parameters dialog box software sets the P4 parameter to 1 000 000 A number this large effectively disables the integral term P6 Minimum output in percent P7 Maximum output in percent P8 Reference variable W P9 Actual integral action time Tn in seconds If XD1 is zero P9 is also zero If XD1 is one P9 contains the user defined value of Tn stored in P5 The following parameter values are recommended based on a 5 second controller cycle time Temperature Control Application Type of Cooling Coil Heating Coil Contre The PID algorithm is based on the discrete form of the non iterating PID formula Y 50 100 E Xp 100 Xp Tn Da Ej to 100 Tv Xp Ep i 0 En 1 to 150 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Variable Xp Tv Tn min_out max_out X W Xd ALPHABETIC REFERENCE Description Comments throttling range or proportional band derivative time integral action time minimum output maximum output controlled Variable set point or reference variable integral action control digital point controller output Cycle Time s
159. ng cooling that is the maximum cooling effect Number type decimal Unit Degrees Fahrenheit Default 95F 35C Range 50 through 140F 10 through 60 0C This field is intended for use as the highest allowable discharge air setpoint during heating that is the maximum heating effect Number type decimal Unit Degrees Fahrenheit Default 55F 13C Range 40 through 90F 5 through 32C Lowest mixed air or discharge air setpoint while in the ZEB range 1 ZEB Zero energy band 2 Heating control setpoint 3 Cooling control setpoint 4 Heating and cooling control setpoint Number type decimal Unit Percent Default 65 percent rh Range 40 through 80 percent rh Number type decimal Unit F Deg Default 27 F Deg 15K Range 9 through 45 F Deg 15 through 25K Number type decimal Unit F Deg Default 10 F Deg 6K Range 0 through 36 F Deg 0 through 20K Number type decimal Unit F Deg Default 12 F Deg 7K Range 0 through 45 F Deg 0 through 25K Radio buttons determine the following e the type of the humidity sensor relative or absolute humidity e whether or not a humidity sensor is connected 173 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Parameter Number Descriptions Operation 74 5577 10 US EN2B 0184 GE51 R0404 Europe P9 P10 P11 P12 P13 P14 CARE CONTROL ICONS Comfort range Relative 1 or absolute 2 humidity sensor Minimum cooling setpoint
160. ng the controller with the XI584 Operator Terminal See also the X1584 Portable Operator s User Guide and the CARE User Guide for detailed descriptions of the printout Example Main 1 Main module MO Module 2 Parameter file number 0 List 3 4 P Nr Description Value Eng Unit Symbol Reference Bi itis ee et ee a is il hss Sl ede yt Sahl eee SM a ait Rh a Net sat E fea A 6 1 Internal use 0 000 l l 7 2 Internal use 1 000 l 8 Control 9 Plant ah1 Loop 10 Control loop Loop1 List 11 Parameter file number 71 12 13 P Nr Description Value Eng Unit Symbol Reference 14 15 1 Internal use 0 000 16 2 Internal use 1 000 17 3 Proportional band Xp 12 000 2 1 18 4 Derivate time TV 0 000 2 1 19 5 Internal use 1000 000 2 1 20 6 Minimum output 0 000 Diet 21 7 Maximum output 100 000 25 1 23 8 Integral action time Tn 1000 000 oma 24 Switch 25 Plant ahl Table 26 Switching table MaDmpr List 27 Parameter file number 2 28 29 P Nr Description Value Eng Unit Symbol Reference 30 31 1 Internal use 0 000 32 2 Internal use 1 000 33 3 Hysteresis of Line 1 Table 1 5 000 1 34 4 Comparison Value 2 of Line 1 Table 1 32 000 1 35 5 Hysteresis of Line 2 Table 1 3 000 1 36 6 Comparison V
161. nt 0 0 0 ee eeeeeeeeeeeeeenneeeeeeeeeeeenteeeeeaaes 87 XFM 36 1 S R Switching Behavior eee ceeeeseeeeeeeeceenneeeeeeeeeeesnteeenenaes 87 XFM 36 1 S Sequential Load Switching ee eceeeeeeeeeseeeeeeeeeeeenneeeeeeaas 87 XFM 36 1 R Rotational Load Switching 0 ecceeeeeeeeeeeneeeeeeeeeeeeeneeeeseaas 89 PRMFFUNCHONS iioaeoei a a ea aa aa 90 Automatic Load Switch On after Maximum OFF Time Expiration 91 XFM 36 1 General Functions 20 00 eee scence eeeneeeeeneeeeeeaeeeeneeeeeesnteeeneaaes 91 Heating Curve with Adaptation HCA sessssssesrsesssiiesriiresrissrrirssrinreerinrssrrsersenns 94 Humidity and Enthalpy H X ssssssnsnsssesssnnnnsssssnrnnsnssssnrnnnnssrnnnnnsnsnnnnnnnsnesnnnnn nn 97 Mathematical Editor MAT ccceeeeeeeeeeesneeeeeeeeeeeenneeeeesaeeeseeeaeeeenneeeeeeneeeeeeaaes 99 Formula Entry Procedu Te a eaae aaae e eeen aiee A da ita pae te tadaa iiiaae tien 100 Integral Function INT Dialog BOX cccccccecsecceceeeeeeeeeeeaeeeeeeeseseeneeeeeeeeetees 104 Differential Function DIFT Dialog BOX c ccccceeeseeeeceeeeeeeeseeeeaeeeeeeeeeeeees 106 Linear Equation LIN Dialog BOX 0 e ec eeceeeesneee eset ee eeneeeeeenaeeeseeaeeeenneeeenee 107 Polynomial Equation POL Dialog BOX eee eeeeeeeeneeeeeenneeeeeenaeeeenneeeeneas 109 Connection of the MAT Icon to a Control ICON seereis 110 Maximum MAX 20s cccccceecccedacsietecncecteeece pousicaveeseneteesdadsneesdeveticecees
162. nt lant ON Note that the user address Plant On must be a digital pseudopoint and set by a Time Program to an On or Off value The ZEB icon decides whether the system is in heating or cooling mode This example is operated with the corrected setpoint during optimized start up If the plant is in heating mode and optimized start up is active YD2 1 the SWI icon passes a higher room setpoint of 5K If the plant is in cooling mode and optimized start up is active YD2 1 the SWI icon passes a reduced room setpoint of 5K In all other cases no optimization the room setpoint is unchanged The Mathematical editor MAT icon calculates the increase decrease of room setpoint room_setpoint_high room setpoint 5 or room_setpoint_low room setpoint 5 196 CARE CONTROL ICONS EXAMPLES Positioning Signal Limitation Purpose Control Icons Example Limit the range of the output value sent to a positioning signal For example limit the range of values sent to a damper to from 0 to 100 percent As shown in the following diagram a function output can vary across all real numbers However the device being controlled may have a set range between a minimum and a maximum value Use the MIN and MAX control icons If the linear function Y 2X 20 where 50 lt X lt 150 defines the output signal for a mixing valve with a three position output O through 100 percent r
163. nternal_Parameter Internal_Parameter Version 85 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Parameter Setting Default Number Type Brief Description Range Value Display Rotational Sequential Operating Mode none Integer 1 rotational O sequential gt SS Display Po_Power_to_Switch switching power input Display RM_Input_Feedback see RM Functions none none EA section Display St _Output_Stage current load status none none Integer 1 on O off 5 pepey Minimum_On_active ON time active 1 Integer Display Switch_On_Index equals I A___ On_Index none none Integer P1 2 3 in sequential mode longest on time in rotational mode Display Switch_Off_Index no function in sequential none Integer mode load off time in rotational mode XFM 36 1 and 36 1R 41 Comm Minimum_offtime st B eel 12 Comm Maximum_Off_time 0 1440 i EE B Mode_of RONI 0 1 2 Integer ele Load_Number priority rank within a group Integer 0 RM for status feedback 1 RM and Po 2 No RM function Ee ee Power_of_the Load highest number is shed 0 1000 1000 first 16 Progr Feedback_Op_Mode 0 1 2 2 Integer 0 RM for status feedback 1 RM and Po 2 No RM function a7 me mena Pareme J o o e m imema Pareme J o O o ter CT XFM_Number 36 1 XFM 36 1 Integer 36 11 XFM 36 1S 36 12 XFM 36 1R Type abbreviations Display indicates the program s internal
164. nto heating cooling and zero energy bands ZEBsubdivides a predetermined comfort band into e Heating band e Zero energy band Cooling band The zero energy band represents a temperature range in which the room temperature may vary without a need for heating or cooling energy Setpoint optimization results in demand related setpoint control cascade input of the central air conditioning plant as a function of the individual room loads to use the lowest possible energy requirements outside the zero energy band The term cascade implies that the outputs of this function are to be used as inputs for another controller I O Dialog Box Zero energy band Inputs Five analog inputs where X1 Highest zone temperature X2 Lowest zone temperature X3 Average zone temperature X4 Relative or absolute air humidity X5 Setpoint You can enter the X5 setpoint as a parameter engineering unit index number and value Outputs Three analog outputs and two digital outputs where 74 5577 10 US EN2B 0184 GE51 R0404 Europe YD1 Heating system enable disable digital output 1 Enable 0 Disable YD2 Cooling system enable disable digital output 1 Enable 0O Disable Y3 Heating setpoint cascade controller Y4 Cooling setpoint cascade controller Y5 Mixed air damper setpoint cascade controller The Y3 Y4 and Y5 setpoints must be input variables to external controllers The term cascade implies that the outputs of th
165. o zero and the master controller acts like a P controller If XD is one P11 contains the user defined value of Tn stored in P4 P12 Default integral action time of the cascade controller in seconds If XD is zero P12 is also zero and the cascade controller acts like a P controller If XD is one P12 contains the user defined value of Tn stored in P8 Parameters P5 and P6 serve as the minimum and maximum limits respectively of the setpoint assignment to the cascade controller If W is entered as a parameter P3 Xp proportional band master controller P4 Tn in seconds integral action time of the master controller P5 Min minimum limit of the cascade controller P6 Max maximum limit of the cascade controller P7 Xp proportional band of the cascade controller P8 Tn in seconds integral action time of the cascade controller P9 Min minimum limit of the positioning signal in percent P10 Max maximum limit of the positioning signal in percent P11 W reference variable if entered as a parameter not connected to a point P12 Actual integral action time of the master controller in seconds If XD is zero P12 is also zero and the master controller acts like a P controller If XD is one P12 contains the user defined value of Tn stored in P4 P13 Default integral action time of the cascade controller in seconds If XD is Zero P13 is also zero and the cascade controller acts like a P controller If XD is one P13 contains the user def
166. of P8 the basic value 74 5577 10 US Function EN2B 0184 GE51 R0404 Europe Power Demand Control XFMs The power demand control functions measure the energy consumption of the plant electrical units They then calculate current power consumption compare it to a power limit and decide which loads to switch on or off Power demand control consists of four XFMs XFM 35 XFM 36 1 XFM 36 1S and XMF 36 1R Many load switching behaviors are available because multiple XFM 36 1 XFM 35 1S and XFM 36 IRs with various parameter settings can connect toa single XFM 35 62 CARE CONTROL ICONS ALPHABETIC REFERENCE XFM 35 is the strategy program It takes in the totalizer point values applies them to the chosen algorithm and outputs control signals to the XFM 36 1 S R single stage load programs in each of up to three priority groups Each priority group can contain up to 50 single stage load programs XFM 36 1 S Rs connected in a loop NOTE Although 50 XFM 36 1 S Rs are allowed controller cycle time will be long with large numbers of XFM 36 1s Use the smaller XFM 36 1R or XFM 36 1S to use less controller memory and cycle time A total of 127 XFMs are allowed in a controller The following diagram illustrates the principal connections of XFM 35 and multiple XFM 36 1 S Rs Zi Totalizer Stage 1 Po XFM 36 1S D Po St No 1 OO RM Po XFM 36 1S Po St No 2 QO RM Po XFM 36 1R O Po St No 1
167. og point If the input and output types are mismatched IDT converts the input signal to the appropriate output signal For example if the input is an analog point and one of the outputs is a digital point IDT converts the analog signal to the proper digital signal Conversion Table IDT Input IDT Output Conversion Algorithm Type Type Al AO output input only type is changed Al DO if the input lt 0 5 output is O if the input gt 0 5 output is 1 DI AO output input only type is changed DI DO output input only type is changed Al is an analog input physical pseudo or flag AO is an analog output physical pseudo or flag DI is a digital input physical pseudo or flag DO is a digital output physical pseudo or flag None 24 CARE CONTROL ICONS IDT Example 1 ALPHABETIC REFERENCE In applications with multiple pumps you can use IDT to determine the number of currently running pumps You cannot use the MAT editor or the ADD icon since they do not process digital points The following diagram shows how to connect the digital points for the pump relays to IDT icons Each pump requires its own IDT pump switching application pumps_running The Y1 output of each IDT connects to an ADD icon that calculates the number of pumps currently running The ADD output connects to an analog pseudopoint that is available to operator terminals for user display
168. oint 30 to 80 PID SEQ OAT Sensor Discharge air sensor X scale Limiter OAT Outdoor Air Temperature Setup for the internal parameters Y1 when Xa 0 and Ya 80 Yb and when Xb 18 30 and Yb 30 30 Xp 20 Ya 0 18 20 m Xb Xa Only the Y parameters for SEQ are available in the controller after program installation Use the Ratio RAMP function to generate negative values 166 CARE CONTROL ICONS ALPHABETIC REFERENCE Subtract DIF Function Formula I O Dialog Box Inputs Output Internal Parameters DIF Example Other Examples Es Determine the difference between multiple analog input values 2 to 6 You can also use this function to reverse a signal See DIFExample Y X1 X2 X3 through X6 Two through six analog inputs X1 through X6 Minimum two inputs You can enter the first two inputs as parameters engineering unit index number and value for each parameter One analog output Y None This example shows how to reverse a controller signal 100 0 0 100 Y X1 X2 X3 Xb See the Examples chapter for other applications that use the DIF icon 167 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Write WIA Function Write a value to an attributeof a user address The value can come from a Initial Dialog Box Output Attribute Selection Dialog Box 74 5577 10 US EN2B 0184 GE51 R0404
169. ollers The parameter files are named by controller and have a TXT file extension For example in a plant with controllers named CPU1 and CPU2 the associated parameter files are named CPU10000 TXT and CPU20000 TXT CARE creates these files during the translate process and stores them in the CARE directory There are several ways to print files in Windows The best way to print depends on the printer attached to the PC e If itis a wide carriage printer wider than 8 1 2 in paper size you can use File Manager to select the file and print it e Ifthe printer is only 8 1 2 in wide you can use Notepad to open the file and print sideways that is in Landscape format 210 CARE CONTROL ICONS File Manager Procedure Notepad Procedure APPENDIX A PARAMETER LIST DESCRIPTION 1 Make File Manager the active window One way to do this is to hold down the Alt key and press Tab until a message displays File Manager Release the keys Tip gt If the message box never says File Manager the software is not active Keep pressing Alt Tab until Program Manager displays Release the keys The Program Manager window displays Find and double click the File Manager icon RESULT The File Manager window displays Display the directory that contains your CARE files usually C CARE Scroll until you find the appropriate TXT file You can use menu item View dropdown item Sort by Name to resort the list and find th
170. omatically switches the mode of operation to Enable P14 0 This mode of operation corresponds to New start but the weighting of the new values becomes smaller and smaller 126 CARE CONTROL ICONS ALPHABETIC REFERENCE EOH Operation Example 1 The following schematic diagram illustrates EOH use frost protection frost protection function setback active in case of total setback outdoor temp i K 10 C const supply demand in case of frost danger room temp outdoor temp KX 4 room setpoint K inal setpoint setback active T application prog for heat generation A switching table implements an outdoor air temperature dependent frost protection function outside of EOH When outdoor air temperature is less than or equal to 2C 36F the table sets a constant room temperature setpoint for example 10C 50F The value of the constant is the X2 input parameter of the SWI icon Frost protection applies only during the cool down phase because EOH demands a OC 32F flow temperature during this time and the flow temperature setpoint of the application program that is equipped with frost protection is overwritten 127 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE EOH Operation Example 2 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS The following flowchart illustrates the logic decisions of this example START
171. on In heating only systems DUC calculates off time exclusively on lowest zone temperature X2 because heating is only required at the low end of the temperature range If temperatures are above the setpoint the system does not operate and DUC sets off time to the maximum tmax If the minimum zone temperature is less than the lower comfort limit off time is zero that is the system is never cycled off When temperature is between the setpoint and the lower comfort limit DUC calculates heating off time toff YD1 or YD2 0 as t Tess max min t X2 LCL t off X4 LCL thin z SO min SO e gi KS in 68 61 14 min 30 sec DUC switches the heating system off 14 5 minutes before the end of the cycle The following diagram illustrates off time calculation for heating systems 33 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS gt UCL zone temperature Cooling System Off Time Calculation In cooling only systems DUC calculates off time exclusively on highest zone temperature X1 because cooling is only required at the high end of the temperature range If temperatures are below the setpoint the system does not operate and DUC sets off time to the maximum tmax If the maximum zone temperature is greater than the upper comfort limit off time is zero that is the system is never cycled of
172. ondition that you want to calculate The selected field turns light blue Click the MAT symbol in the list of logic icons RESULT The Math Editor dialog box displays New Yariable Copy Paste Select All E 3 i Cancel 2 Click New Variable to enter a new formula name or select an existing formula from the box below New Variable Click the down arrow in the box to display a list of available variable names Click one to select it i HEE EEE ANT Dirr LN PoL ma ee l RESULT If you enter or select a name that already exists the formula for that name displays in the box next to the equals sign If you click New Variable to enter a new name the New Variable Name dialog box displays Type a formula name and click OK to continue Hew Variable Hame X Nome Cancel Heip 74 5577 10 US 100 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE If you type a variable name that already exists in the New Variable Name dialog box software displays an error message box that says Duplicate math output name Names must be unique Click OK to close the message box and type a different name 3 Enter or change a formula using a combination of the following techniques Select a user address from the physical point bar in the Control Strategy or Switching Logic window e Type a user address name If you type a name you must begin it with double quot
173. ope Cancel P1 1 to enable square root 0 to disable Input signals can be in actual engineering units or generic 0 100 percent type For inputs that read in actual engineering units P2 and P3 must be equal OK to leave default values For generic inputs set P2 equal to the actual sensor range that is the value in engineering units that produces 100 percent at the input The default velocity constant P4 4005 is for pitot tube type air flow sensors Use proper value for type of sensor used For linear sensors set this value to 1 56 CARE CONTROL ICONS ALPHABETIC REFERENCE Set the area factor P5 to the duct or pipe cross sectional area to read flow Some linear sensors may be calibrated in flow units For those sensors set P5 to 1 If desired set P6 to about 5 percent of the maximum expected flow so that the output is zero when the flow value is very low for example when the associated system is off NOTE For direct reading inputs P2 and P3 must be equal OK to use defaults To set up a nonlinear sensor with direct reading input value e Make sure the velocity constant P4 is correct The default value is for pitot tube type air flow sensors Set the area factor P5 to the duct or pipe cross sectional area e If desired set the low display value P6 to about 5 percent of the maximum expected output so that the output reads zero when the associated system is off For other parameters use default values
174. or air proportion when the dampers are released minimum controller output has to be 20 percent CAUTION If the system is off the control loop must guarantee that the outdoor air dampers are closed as in other standard control applications to prevent unacceptable outdoor air within the system Use separate switching tables to guarantee this action 204 CARE CONTROL ICONS EXAMPLES Trend Buffer Control Purpose Control Icons Description In many cases trend logs include points whose values change frequently Over a lengthy time interval these frequent variations in signal exhaust the capacity of the trend buffer You can delay the filling of the trend buffer by preventing the writing of trend values to the buffer for a defined time After this time expires you permit buffer writing again for a short interval The following diagram illustrates this procedure blocking time blocking time trend buffer Use the CYC and SWI control icons CYC allows the writing of a point value to a software point during the On time of the cycle The software point is part of trend logging During Off time the point switches into a self hold condition meaning that it maintains its previous value during the entire Off time Because this value does not change for the duration of the Off time it is also not written in the trend buffer 205 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS Th
175. or errors and displays message boxes if there are any If there are no errors software saves the formula If you forget to add quotes to a user address software displays an error message box saying Missing double quote If there are illegal characters in the formula or a user address in the formula software displays Illegal character in math expression or Illegal character in User Address 5 In the Switching logic function the formula is now complete 74 5577 10 US 102 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Function Hierarchy Change Existing Formula Digital Conversion Parameter Number Descriptions ALPHABETIC REFERENCE In the Control strategy function you must connect the MAT icon to another icon as an input See the Connection of the MAT Icon to a Control Icon section for procedure The MAT operator adheres to the typical rules of formula calculation First MAT solves any SQRT ex integral differential linear and polynomial functions in a left to right order unless overridden by brackets Next it performs multiplications divisions additions and subtractions in this order unless overridden by parentheses or brackets In the Control strategy work space click the MAT icon using the right hand mouse button The Mathematical Editor dialog box displays with the formula Use the highlight and change techniques as explained in the previous procedure to modify formu
176. ould be created to be used to display the value of the various attributes to an operator None RIA user address attributes To other control functions Al or hardware he software points p A4 A5 The following table lists attributes that you can select for the various point types NOTE The list of attributes presented in the icon change depending on the type of connection For example if the output is connected to a digital type connection if it is a point or another icon then the list of available attributes consists of only the ones marked dig in this this table The same type of list is available when an analog type connection is made only the ana are available A special condition exists when the attribute Manual Value is selected The available list only consists of Manual Value and No Attribute 158 CARE CONTROL ICONS ALPHABETIC REFERENCE dig ana AVPAI DUPDI AO PO DO sPos GA GD TOT FLEX Saar Accumulated Runtime ana o ae S ST xx S ax ey ee ee ee x Alarm Hysterisis an x To o XT Auto Vale aa f o S T x T T T f o x Cycle Count ana X X X Global Broadcast Threshold ana J J OT T x p T f High Alarm Limit ana X X High Warning Limit ana Xx f J o Too T T T o Low Alarm Limit an x To To T o T T S Ee Low Warning Limit ana Xx f J o J T T T T e O Manual Value ana X X X X X X X X X Operational Mode dg X x x x x x x x x
177. ower demand program with three priority groups each with three loads Note that the 1 has been added to certain user addresses in the first priority group Likewise 2 and 3 are added to the appropriate user addresses in the second and third priority groups respectively XFM 35 Pot SWITCH POWER TOTALIZER Zi Po2 SWITCH POWER SYNC PULSE SYC Po3 SWITCH POWER SWITCH POWER Pot IA___Energy_Intv SWTICH POWER Po2 ID___Sync_failed SWITCH POWER Po3 ID___Peak_Load ID___ Tariff ID___ Shutdown STARTUP ID___Off_Prio_1 ID___OFF_Prio_1 ID___Off_Prio_2 ID___OFF_Prio_2 ID___Off_Prio_3 ID___OFF_Prio_3 ID___Man_load_shed ID___ON_Prio_3 ID___ON_Prio 3 ID___ON_Prio_2 ID___ON_Prio 2 ID___ON_Prio_1 ID___ON_Prio_1 Counter_Zi ID___Rotating_P1 ID___Rotating_P2 ID___Rotating_P3 XFM 36 1 XFM 36 1 XFM 36 1 Po Po Po Po St RM RM RM IA__Off_Index_P1 D__Rotating_P1 IA__Off_Index_P2 D__Rotating_P2 IA__Off_Index_P3 D__Rotating_P3 IA_On_Index_P1 A__Off_Index_P1 IA On index P2 A__Off_Index_P2 IA On Index P3 A__Off_Index_P3 ID__Off_Prio_1 1A__On_Index_P1 ID__ Off_Prio_2 1A__On_Index_P2 ID__Off_Prio_ 3 IA__On_Index_P3 ID__On Prio 1 _Off_Prio_1 ID__On Prio_2 _Off_Prio_2 ID__On Prio_3 __Off_Prio_3 ___On_Prio_1 __On_Prio_2 __On_Prio_3 __ Peak_Load __ Peak_Load __ Peak_Load ID___ Shutdown ID___ Shutdown ID___ Shutdown XFM 36 1 XFM 36 1 XFM 36 1 Po Po Po Po Po Po St RM St RM St RM IA__Off_Index_P1
178. ox and the internal parameters dialog box Examples chapter for descriptions of applications that use multiple icons 7 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Add ADD Function Sum multiple analog input values two through six 1 0 Dialog Box Add sum of inputs JL n x2 O x3 O f x40 x5 O x6 O Inputs Two through six analog inputs X1 through X6 Minimum two inputs You can enter the first input as a parameter engineering unit index number and value Output One analog output Y Internal Parameters None Example See the Examples chapter for a description of how to use the ADD icon in a floating limits and alarm suppression application Also see the Data Transfer IDT section for examples that show how to use ADD with IDT 74 5577 10 US 8 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Analog Switch SWI Function Switch an analog value depending on a digital value For example If XD1 1 set output Y to X2 If XD1 0 set output Y to X3 Formula Y X2 if XD1 1 Y X3 if XD1 0 1 0 Dialog Box Inputs One digital input XD1 Two analog inputs X2 and X3 You can enter the two analog inputs as parameters engineering unit index number and value for each parameter Output One analog output Y Internal Parameters Parameter Number Descriptions Example None P3 X2 if X2 is not connected
179. p 3 1 There is at least one load to switch off in priority group 3 Output Reset of the loads available to turn off detection for the priority group 3 ID___Man_load_shed VD Output Signal to initiate an alarm and inform about the necessity of manual load shedding Signal is not active Set Active State of this point to 1 ID___On_Prio_3 Input 0 There is no load to switch on in priority group 3 1 There is at least one load to switch on in priority group 3 Output 0 Reset of the loads available to turn on detection for the priority group 3 ID__On_Prio_2 VD Input Input Output 0 There is no load to switch on in priority group 2 1 There is at least one load to switch on in priority group 2 Output 0 Reset of the loads available to turn on detection for the priority group 2 ID___On_Prio_1 VD Input Input Output 0 There is no load to switch on in priority group 1 1 There is at least one load to switch on in priority group 1 Output Reset of the loads available to turn on detection for the priority group 1 _Rotating_P1 Output 0 Load switching is sequential in priority group 1 Load switching is rotational in priority group 1 ___ Rotating_P2 Load switching is sequential in priority group 2 Load switching is rotational in priority group 2 ID____ Rotating_P3 VD Output 0 Load switching is sequential in priority group 3 Load switching is rotational in priority group 3 Counter_Zi Input Connection to
180. pe 61 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Outputs Internal Parameters CARE CONTROL ICONS Five outputs h Current hourly consumption ph Past hourly consumption d Current daily consumption pd Past daily consumption pmo Past monthly consumption The outputs require creation of five user addresses of the type pseudo analog Submodule Parameters xfm_34 csd Ed Index Parameter Displ current hour Displ_past_hour Displ_current_day VYalue Mapped SW Point Unit New Value New Unit Displ_past_day Displ_current_mon Displpast_mon Displ_total Basic_value Internal_parameter Initialisation_con Unmap Modify Internal_parameter Version_number XFM_number P1 Displ_current_hour Current hourly consumption P2 Displ_past_hour Past hourly consumption P3 Displ_current_day Current daily consumption P4 Displ_past_day Past daily consumption P5 Displ_current_mon Current monthly consumption P6 Displ_past_mon Past monthy consumption P7 Displ_total Total consumption since startup P8 Basic_value Counter value at totalizer start point P9 Internal_parameter No user entry P10 Initialization_con Initialization of total consumption P11 Internal_parameter No user entry P12 Version_number P13 XFM_number Read only parameters Set P10 to 1 to cause the value of P7 to be reset to the value
181. perature for optimum stop When outside air temperature is at or below this value the stop time will not be advanced in heating mode Units Min F Deg Default 10 Range 0 to 100 Optimum stop factor For optimum stop during heating this value sets the amount of influence that the difference between room temperature and its setpoint has on advancing or retarding the optimum stop calculation The base stop time is 120 minutes before the schedule stop time For every degree that the room temperature is below setpoint the base stop time will be decreased by the value of this parameter For every degree that the room temperature is above setpoint the base setpoint will be increased by the value of this parameter Set to 0 to make optimum stop during heating solely dependent on outside air temperature Units Min Default 0 Range 0 to 120 Minimum cool down time for optimum start This specifies a minimum amount by which to advance the schedule start time in cooling mode regardless of the actual optimum start calculation 132 CARE CONTROL ICONS High speed cooling factor Max outside air temperature for opt switch off Optimum for stop factor Factor adaption Parameter Number Descriptions EOV Operation ALPHABETIC REFERENCE P8 Units Min F Deg Default 10 Range 0 to 100 Cool down rate for optimum start When the plant is turned on for cooling this value is the number of minutes it takes to decrease room temperature by 1
182. point 155 Z ZEB 171 ZEB Cooling operation 174 ZEB Dehumidification 175 ZEB example 176 ZEB Heating operation 175 ZEB Mixed Air operation 173 ZEB operation 173 Zero Energy Band ZEB 171 74 5577 10 US EN2B 0184 GE51 R0404 Europe INDEX CARE CONTROL ICONS 74 5577 10 US 222 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS INDEX 223 74 5577 10 US EN2B 0184 GE51 R0404 Europe Automation and Control Solutions Honeywell International Inc Honeywell Limited Honeywell Limitee 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Scarborough Ontario M1V 429 USA Canada http www honeywell com http www honeywell ca 74 5577 10 US Printed in Germany EN2B 0184 GE51 R0404 Europe Honeywell GmbH Boblinger Stra e 17 D 71101 Sch naich Germany DIN EN ISO 9001 14001 http europe hbc honeywell com Honeywell Subject to change without notice
183. point SPt Start up ramp time SRT controls the rate of change of the output during the start up period Specifically SRT is the minimum amount of time it takes for the output to go from the output start value to either 0 or 100 percent The auxiliary input Aux is primarily intended for applications where EPID is used for high or low limit applications When the enable input is off the EPID output is set to the OSV Outputs Out output Parameter P1 controls action of output 0 direct action 1 reverse 74 5577 10 US EN2B 0184 GE51 R0404 Europe action Rmp start ramp value 0 100 pct 52 CARE CONTROL ICONS 100 EPID OUTPUTS Example 1 Example 2 Aux Input Function Example 3 ALPHABETIC REFERENCE The output start value input controls the initial value of the output at the beginning of the start ramp period This value is also present at the output when the enable input is off The ramp output goes from 0 to 100 during the start up ramp period Provided for diagnostic use if desired The start ramp time input sets the duration of the start ramp by controlling the value of internal Parameter P7 You should not directly set the value of P7 If you enter a value for SRT in CARE software creates an MO parameter The integral component is not saved directly Instead the proportional and derivative values are used to determine what the integral component should be to produce the current output value If th
184. point there are no more loads that can be switched on All three user addresses ID On_Prio_3 ID On_Prio_2 and ID__On_Prio_1 are zero XFM 35 switches off Priority Group 1 XFM 36 1 loads first It then switches off Priority Group 2 loads and then Group 3 loads XFM 35 sets the Priority Group 1 Po1 output to a negative switch off power value as long as the value of user address ID___Off_Prio_1 is 1 True After all loads in Group 1 are off software sends a zero value False to ID___Off_Prio_1 XFM 35 then sets the Priority Group 2 Po2 output to a negative switch off power value as long as the value of user address ID___Off_Prio_2 is 1 True After all loads in Group 2 are off software sends a zero value to ID__Off _Prio_2 XFM 35 then sets the Priority Group 3 Po3 output to a negative switch off power value as long as the value of user address ID___Off_Prio_3 is 1 True After all loads in Group 3 are off XFM 35 sends a zero value to user address ID___Off_Prio_3 At this point there are no more loads that can be switched off All three user addresses ID___Off_Prio_1 ID___Off_Prio_2 and ID___Off_Prio_3 are zero XFM 35 cannot distribute the next calculated negative power value to any load as all loads are shed off XFM 35 initiates an alarm by setting user address ID___ Man_load _ shed to zero This alarm means that manual load shedding is required 78 CARE CONTROL ICONS Shed Restore Value Limitation Output Po1 2
185. preheat phase EOH sends a logical 1 to output YD2 During this time EOH overwrites supply temperature setpoint in the application program with the flow temperature setpoint Y1 See previous diagrams If room temperature X1 reaches the setpoint of the Time Program X3 before the target time point EOH switches over to room control automatically You must use an internal PID controller whose integral action time P16 and room control multiplier P15 can be set After reaching the target point EOH still works a half an hour longer as a room controller EOH then writes a logical 0 to output YD2 to allow the application program to take control This extended control by EOH compensates for the cool down effect from the walls and furniture after a rapid preheating so that an almost constant room temperature is guaranteed with the transfer to temperature dependent control after ending the preheat optimization Cool Down Optimization WITH Room Sensor Cool down optimization with a room sensor operates with the same principles as without a room sensor but it also takes into account room temperature Ifthe room temperature is higher than the setpoint for example through isolation body heat etc the characteristic set is steeper causing EOH to switch off heating earlier maximum 120 minutes 124 CARE CONTROL ICONS ALPHABETIC REFERENCE If room temperature is less than the setpoint characteristic set is more gradual causing EOH
186. put connects to the controller for the cooling valve as the controlled variable The connection is made as the controlled variable to reverse the direction in which the controller works If the ZEB statement initiates cooling YD2 1 the positioning signal from the controller reaches the valve drive In addition the mixed air setpoint connects to the damper controller for dehumidification when cooling is active If YD2 equals zero the controller is overridden and the valve is closed Mixed Air Damper Controller ZEB releases the mixed air dampers if neither heating nor cooling is active YD1 and YD2 are zero or if cooling is active YD2 is 1 If neither heating nor cooling is active all temperatures are within the zero energy range ZEB releases the dampers for air regulation If cooling is active ZEB must also release the dampers because dehumidification can activate cooling and then damper intervention is required A switching table releases the dampers The mixed air setpoint Y5 connects to the damper controllers as the controlled variable for reversal The positioning signal from the controller reaches the damper drive when the dampers are released If the dampers are blocked the controller is overridden and the dampers are closed to a minimum outdoor air proportion of 20 percent The SWI control icon can provide the zero and 20 percent constants that override the controller when necessary To guarantee a minimum outdo
187. r and an air cooler Setpoint management using the ZEB statement followed by PID controllers regulates this system 177 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS 74 5577 10 US 178 EN2B 0184 GE51 R0404 Europe CARE CONROL ICONS EXAMPLES Attenuator Average Value Calculation Floating Limits and Alarm Suppression Operating Pump Switchover Optimized Start Stop Positioning Signal Limitation Setpoint Adjustments System Regulation Trend Buffer Control Summary Table This chapter describes applications that combine multiple icons to perform a control function Applications are arranged alphabetically and include the following Use the MAT SWI and DIF control icons calculate a good approximation of a mean value in this example an outdoor air temperature Use the SWI MAT CYC and EVC icons to calculate an average outdoor air temperature over three days Fixed alarm limits for some sensors such as a supply air sensor are not meaningful so it is useful to adapt the limits to a setpoint within an adjustable interval Also it is often useful to suppress nuisance alarms Use WIA ADD and DIF to float limits and suppress alarms Use RIA SWI and MAT to switch pump operation between two pumps dependent on hours of operation Calculate optimized values for starting and stopping air conditioning systems Systems should start at the latest possible time and s
188. rapolation algorithms 3 Switch power Priority 1 4 Switch power Priority 2 Zi Syc Po1 Po2 03 Remaining power value from priority group 2 A 5 Switch power Priority 3 Remaining power value from priority group 3 1 Switch power Priority 1 Outputs output Abbrev Type Comment T Swich power Prora Po Power switching value to priority group 1 y Pot 2 Switch power Priority 2 Power switching value to priority group 2 riy Pos 3 Switch power Priority 3 Pos Power switching value to priority group 3 69 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Datapoints Button CARE CONTROL ICONS Type abbreviations DI Digital input VA Virtual pseudo analog Click the Datapoints button to display the datapoints dialog box for XFM 35 Click on Set for each of the XFM pointnames CARE automatically creates user addresses with the same names Later sections describe how to use these points depending on operation desired The table following the dialog box summarizes user address types and functions Datapoints From XFM xfm_35 csd Type XFM Pointname CARE User Address lA___Energy_Inty STARTUP ID___ Sync_failed ID___ Peak_load ID___ Shutdown ID___Off_Prio_1 The Counter_Zi last pointname is handled differently from the other pointnames After hightlighting Counter_Zi click on the totalizer point in the schematic User Address Type Input Commen
189. rategy icon turns light blue The other icon also turns light blue if all input output connections are done 111 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Maximum MAX Function I O Dialog Box Inputs Output Internal Parameters Parameter Number Descriptions Example 74 5577 10 US EN2B 0184 GE51 R0404 Europe Output the highest valueamong two through six analog inputs For example in control technology continuous positioning signals are often calculated using mathematical functions These functions are defined for the entire set of real numbers while positioning signals are typically valid only for a subset of numbers for example 0 to 100 percent You can use the MAX iconto define the minimum output value to a signal If for example a function outputs a value below 0 you can use MAX to select either the function output or 0 whichever is higher Max highest input oo x2 O x3 O xa O x5 O x6 L Two through six analog inputs X1 through X6 Minimum two inputs You can enter the first input as a parameter engineering unit index number and value One analog output Y None None See Positioning Signal Limitation in the Examples chapter for an application that uses the MIN and MAX icons to limit an output signal Also see the Duty Cycle DUC section You can use MAX to calculate an input value for highest zone temperature
190. re also cooled down and must be heated if the room is to be heated When operating EOH without a room sensor you must determines dead times and time constants manually The following diagram shows how you can determine dead time Tu and time constant Tg from the building characteristic curve room setpoint L gt 2 2 2 fe fe Tu gt 4 Tg heating on The diagram plots the development of room temperature from heating switch on until it reaches room temperature setpoint You can draw this type of characteristic curve by recording room temperature analog input at the Excel controller and outputting this value to a plotter through an analog output with the characteristic curve 0 through 50 C 0 through 10V You need to record separate characteristic curves for preheat after a short cool down and after a lengthy cool down When operating EOH with a room sensor you can define dead times and time constants with the corresponding parameters If you select Disable for adaptation in the internal parameters dialog box Parameter P14 1 these parameters remain valid If you select New start for adaptation Parameter P14 2 EOH determines dead time and time constants automatically from actual temperature development during the preheat phase EOH weights the new values and uses them to correct the old parameter values After the first identification of dead times and time constants EOH aut
191. resis The following diagram illustrates the control strategy with switching tables for this example HW terminal valve Loading_Pump HW temperature loadingpump dt termin valve termin valve Ta 200s supply LT ET Tt TT setpoint An additional condition is that the common flow temperature of the heat generators is larger than the setpoint plus an increase This condition is necessary to compensate for piping losses and to prevent the service water storage tank from cooling down because of an excessively low flow temperature instead of being charged summer case This condition is implemented using a switching table that contains a mathematical formula that calculates Y equal to the setpoint plus the increase The pump is switched on and the actual charging of the service water storage tank takes place through a switching table beginning exactly when the valve receives the signal for opening for at least 60 seconds Te 60s The delayed switch on of the charging pump prevents the pump from working against the isolation valve A switch off delay Ta 200s is built into the switching table for the terminal valve 28 CARE CONTROL ICONS ALPHABETIC REFERENCE This extended running switches the pump and valve off with a delay and serves to prevent an accumulation of heat When the service water storage tank reaches its temperature and no longer sends a demand to the heat generator a further rise of the flow
192. reverse acting The result of this control over a range of 18 through 22 might look like this 18 20 22 100 25 50 75 0 Controller output 0 100 Minus output Open 100 Open 100 Closed 0 Closed 0 0 100 heating ventilating cooling Y1 Y2 Y3 Note that the sequence diagram looks the same as for the reverse acting example Setup for the internal parameters differs as follows Choose Y3 when Xa 0 and Yb Ya 100 and when Xb 25 Lo and Yb 0 100 Ya 0 25 100 Xb Xa 164 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Choose Y2 when Xa 25 and Ya 0 and when Xb 75 and Yb 100 Choose Y1 when Xa 75 and Ya 0 and when Xb 100 and Yb 100 Sequencer Example 100 SEQ 0 Xp 100 X scale limiter Setup for the internal variables Choose Y1 when Xa 0 and Ya 100 and when Xb 50 and Yb 0 Choose Y2 when Xa 50 and Ya 0 and when Xb 100 and Yb 100 165 ALPHABETIC REFERENCE Yb 100 Ya 0 25 75 100 Xb Xa Yb 100 Ya 0 75 100 Xb Xa 100 In this example the SEQ icon outputs to two Y variables from a PID 0 100 Yb Xp 100 100 Ya 0 50 100 Lo Xb Xa Yb 100 Xp 100 Ya 0 50 100 Xb Xa 100 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Using a SEQ to produce a setpoint Parameter Availability Negative Values 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS This example produces a setpoint Setp
193. rgy Optimized Ventilation EOV 130 Optimum stop period 129 Output highest value 111 Output lowest value 112 P P controller 141 Parameter availability 165 Parameter list description 207 Parameter modifications 80 PD controller 142 PDS 97 PI controller 142 PID 139 PID controller parameter 143 PID operation 145 PID Plus 147 PID Plus algorithm 149 PID Plus Gains 149 PID schematic 140 PID with ECO 146 POL 109 Polynomial Equation POL 109 Positioning Signal Limitation example 195 Power Demand Control XFMs 62 Power Limit Setpoint 81 Precondition rooms 113 Priority groups and their switching behavior 78 Produce setpoint 165 Proportional output 152 Proportional Integral Derivative controller PID controller 139 Proportional Integral Derivative controller PID Plus 147 R RACL Editor General 2 Overview 2 RAMP 152 RAMP example 155 Ratio 60 Ratio RAMP 152 Read RIA 156 Read one to five attributes 156 Reference variable 139 Register counted values 48 Residual heat in a building 116 Reverse acting example 162 Reverse PID operation 146 Reverse vs direct acting 145 Reverse acting controller 145 RIA 156 RIA attributes table 157 RIA operation diagram 157 RM functions 90 Rules of formula calculation 103 CARE CONTROL ICONS S Scale changes 154 SEQ operator 159 Sequence SEQ 159 Sequence from one to three analog outputs 159 Sequenc
194. rm P5 Minimum output in percent P6 Maximum output in percent P7 Reference variable W P8 Actual integral action time Tn in seconds If XD1 is zero P7 is also zero If XD1 is one P7 contains the user defined value of Tn stored in P4 PD Controller if W is NOT entered as a parameter P3 Proportional band Xp P4 Derivative time Tv in seconds P5 Minimum output in percent P6 Maximum output in percent P7 Dummy parameter This parameter usually stores integral action time It has no effect in a PD controller PD Controller if W is entered as a parameter P3 Proportional band Xp P4 Derivative time Tv in seconds 149 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Recommended PID Plus Gains 74 5577 10 US PID Plus Algorithm P5 Minimum output in percent P6 Maximum output in percent P7 Reference variable W CARE CONTROL ICONS P8 Dummy parameter This parameter usually stores integral action time It has no effect in a PD controller PID Controller if W is NOT entered as a parameter P3 Proportional band Xp P4 Derivative time Tv in seconds P5 Integral action time Tn in seconds If you set Integral action time to zero in the internal parameters dialog box software sets the P4 parameter to 1 000 000 A number this large effectively disables the integral term P6 Minimum output in percent P7 Maximum output in percent P8 Actual integral action time Tn in seco
195. rnal parameters dialog box software sets the P4 parameter to 1 000 000 A number this large effectively disables the integral term P6 Minimum output in percent P7 Maximum output in percent P8 Reference variable W if entered as a parameter not connected to a point To use only the proportional term of the PID controller set Derivative time and Integral action time to zero Set the Proportional band value to indicate how large the deviation must be to cover the entire positioning range The following diagram illustrates the proportional band 142 CARE CONTROL ICONS PI Controller PD Controller ALPHABETIC REFERENCE For example to control a mixing valve that can be open only between 25 and 75 percent Minimum output and Maximum output you can set the internal parameters as follows Proportional band range 25 deviation across the range Minimum limit 25 percent Maximum limit 75 percent Software calculates the proportional band according to the following formula gt 100 50 75 25 The operating point of the PID controller is at 50 percent that is PID output is 50 percent when the controlled variable is equal to the reference variable To use the proportional and integral terms of the PID controller set Derivative time to zero Input the other parameters as explained for the P Controller To use the proportional and derivative terms of the PID controller set Integral action time to zero Input
196. rom falling below 45F Example 4 The following diagram is an example of a duct static pressure discharge reverse acting high limit application HIGH LIMIT EPID Duct Disch Static Press Supply F a g Vol Cir Output High Limit S P 5 WC Aux Input 100 Start Ramp Aux Input 0 100 0 100 Static Pressure Ctrl EPID Duct Static Press Discharge High Limit EPID Sequence The static pressure sensor located two thirds down the longest duct run modulates the supply fan air volume to maintain duct static pressure A duct discharge static pressure high limit controller prevents the supply fan discharge static pressure from rising above the high limit setpoint 5 in wc 74 5577 10 US 54 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Internal Parameters Submodule Parameters epid csd x Index Parameter VYalue Mapped SW Point Unit New Value a ee 0 000 Throttling_Range Integration_Time New Unit Derivative_Time 0 j Output_Minimum Output_Maximum Set_By Input_ SRT Unmap Aux_Input_Mode Constant Prop_Limit Modi OOnNOO Whe P1 0 for direct action P1 1 for reverse action Set P3 to 0 to eliminate integral control Set P4 to 0 to eliminate derivative control 55 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Function 1 0 Dialog Box Input Output Internal Parameters FLOW CALCULATION FLOW Output a flow rat
197. rt After this time EOH reverts to a standard OAT DA compensator EOH software includes HCA functions For automatic adaptation of the heating curve discharge air vs outdoor air e Connect a space sensor 129 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Optimum Stop 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Set space temperature setpoint greater than 64 4F 18C Enable adaptation P14 Ensure the following conditions Average OAT must be less than 59F 15C Adaptation must occur at least three times before you can alter the defaults for the basic setting of the heating curve EOH calculates the optimum stop period based on outdoor air temperature Built in Maximum Off 2 hours A OAT Min OAT below this temperature software does not calculate an optimum stop time Depending on whether or not a room temperature sensor is connected software may further modify this optimized stop period for example e Increase if room temperature is greater than room setpoint maximum 2 hours e Decrease if room temperature is less than room setpoint At the calculated stop time software resets discharge air setpoint to zero and changes digital output YD3 to logic 1 YD3 remains at logic 1 until optimum start next day or later 130 CARE CONTROL ICONS ALPHABETIC REFERENCE Optimum Start Stop Energy Optimized Ventilation EOV Function 1 0
198. rtional Integral Derivative PID function and a Maximum function MAX This manual assumes you are familiar with the CARE process especially the control strategy and switching logic functions See Excel CARE User Guide 74 5587 US EN2B 0182 Europe for details and procedures for the control strategy and switching logic functions In the English measurement system degrees Fahrenheit F usually represent both the temperature measure and the differential measure Dialog boxes shown in this manual represent temperatures as F and differentials as F Deg This manual contains the following chapters This Introduction lists other technical literature related to control icons describes the dialog boxes related to control icon operation and provides a table that summarizes the available control icons The Alphabetic Reference chapter describes each control icon The beginning of the chapter summarizes the type of information provided for each icon The Examples chapter describes applications that combine more than one control icon to perform functions These examples are in addition to the individual examples for each icon in the Alphabetic Reference chapter Appendix A Parameter List Description provides information about the parameter list file generated by CARE when a plant is translated This file documents the parameters used in the control icons and switching logic tables It is useful during plant testing Appendix B STARTUP U
199. rve curvature P3 Heating curve slope P4 74 5577 10 US EN2B 0184 GE51 R0404 Europe Calculate an output according to a user defined and adaptable heating compensation curve The output is used as a setpoint for a discharge control loop For example HCAcan be used to calculate a discharge air temperature setpoint Software calculates the discharge air temperature setpoint from the room temperature setpoint and the outdoor air temperature using the heating compensation curve See Operation note in this section for more details Heating curve Four analog inputs X1 through X4 and one digital input XD5 where X1 Room temperature setpoint X2 Outdoor air temperature X3 Room temperature X4 Discharge air temperature XD5 Heating pump status The room temperature setpoint X1 must have a user address The X3 X4 and XD5 inputs are only required and only appear when working with adaptation One analog output Y Heating curve curvature Heating curve slope Heating curve slope limit With adaption Without adaption Number type Decimal Unit None Default 1 33 Range 0 to 2 Number type Decimal Unit None Default 1 6 Range 0 4 to 4 5 94 CARE CONTROL ICONS Heating curve slope limit P5 Parameter Number Descriptions HCA Operation ALPHABETIC REFERENCE Number type Decimal Unit None Default 1 6 limits 0 4 to 4 5 The radio buttons determine whether operation is w
200. s description later in this section for details e User addresses ID___Peak_load and ID___ Shutdown are 0 that is the peak load and shutdown functions are not active The criteria for sequential switching OFF a load are as follows 88 CARE CONTROL ICONS ALPHABETIC REFERENCE The XFM 36 1 S is in automatic operating mode Parameter P13 0 e Parameter P15 16 17 in XFM 35 is 0 and the corresponding user address ID___ Rotating_P1 2 3 is 0 ID___Rotating_P1 P2 P3 is not required for groups with XFM 3618S e The power value at the first input Po of the XFM 36 1 S is negative The value of the user address IA On_Index_P1 2 3 is equal to the XFM 36 1 S load number set in P14 for example XFM 36 1 S is in the second priority group the value of IA On_Index_P2 is 7 and the load number Parameter P14 is 7 The minimum ON time Parameter P10 of the XFM 36 1 S has expired The following table lists the parameters used for sequential switching mper ra P Peserta ange te PO mber Range lue 10 _ Comm _ Minimum ON Time 0 300 6o eee 11 Comm Minimum OFF Time 0 400 60sec Comm 13 14 aa a Mode of Operation 0 1 2 Integer 0 Auto 1 ON 2 OFF Load Number Priority Rank within a Group 1 50 1 Integer highest number is shed first Power of the Load 01000 7000 Feedback_Op_Mod 0 772 XFM 36 1 R Rotational Load Switching In rotational mode each load in a priority group is switched ON or OFF depending on
201. s note One through three points parameters or control icon inputs AD1 A2 and AD3 Note that a letter D after the A indicates a digital attribute You can enter any of the inputs as parameters engineering unit index number and value for each parameter None The following flowchart illustrates WIA logic with input XD1 enable disable and the priority inputs X2 and X3 x1 1 NO YES Xx2 gt Access Priority NO YES YES NO Set Access Priority New Write Attributes END 169 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE WIA Operation Diagram Priorities Attributes Table 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS user address attributes digital input 1 write A1 digital input 0 inhibit A2 Values from A3 other control functions points or parameters Each point type has associated priorities that WIA and operator commands follow There are two priorities for each point command and residual Priority is a number from 0 through 255 The command priority sets the level required to change the point The residual priority sets the level required to changed the point again after the point is changed For example if a point has a priority of 50 then a command to change the point must have a priority of at least 50 If that command also has a residual priority of 10
202. s the digital software point Enable_ _comp according to the following rules e Enable the component 15 minutes after the negative transition of user address STARTUP Before this transition the main and auxiliary controllers act as P controllers because the component is switched to zero by the XD digital input in PID Plus e A manual override in the second column The override function is active if Override_enable is 1 enabled by manual switch If override is enabled a user can switch the component on and off via Manual_ _Comp no matter what the status is of STARTUP See Appendix B STARTUP User Address for information on how the user address operates This application works only if STARTUP is set according to the information in Appendix B 74 5577 10 US 152 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Ratio RAMP Function 1 0 Dialog Box Input Output Internal Parameters Creating a Ramp Shape the variation in a valueover time ratio or ramp function The resulting ramp can have a maximum of two curves RAMPtranslates an input into a proportional outputbased on a set of user defined curves One analog input X One analog output Y The internal parameters dialog box allows you to define the two curves graphically In the following example the first curve is selected that is there is an empty area within the two axes outlined by a box This box is where the firs
203. s the rotating switching of loads according to their measured times of being On or Off The load that has been 81 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS switched off for the longest time is switched on at first The load that has been switched on for the longest time is switched off at first The settings of Parameters P15 P16 and P17 are transmitted to every load via the appropriate internal user addresses ID____ Rotating_P1 ID___ Rotating_P2 and ID___Rotating_P1 The following table lists parameters used for the switching behavior of the loads Parameter Setting Default Number Type Brief Description Range Value 16 Sequential Rotating 0 1 Priority 2 o1 0 Integer Sequential Rotating 0 1 Priority 1 0 1 oo Integer 17 Sequential Rotating 0 1 Priority 3 o1 o integer Synchronization Pulse Loss Manual Load Shed Required Message Peak Load Notification Ideal Curve and Extrapolation only Shutdown of Loads Ideal Curve and Extrapolation only 74 5577 10 US EN2B 0184 GE51 R0404 Europe The time between two synchronization pulses is measured and should not exceed the value of the 1 03 P10 3 over the measurement interval When this occurs an internal synchronization pulse is initiated to trigger the power calculation algorithm and the internal user address ID___Syc_failed is set to 0 to generate an alarm message ID___Syc_failed remains at 0
204. ser Address describes how the STARTUP user address works and how to use it in control applications Applicable Literature Form No 74 5587 US EN2B 0182 Europe 74 3556 US EN2B 0183 Europe EN2B 162 74 3594 US EN2B 0185 Europe Title Excel CARE User Guide Detailed description of Excel CARE software Excel Live CARE User Guide Instructions for using Live CARE software to access controller files on line and simulate operation RACL Editor User Guide Graphical Editor for creation oft strategy logic programs for Excel 500 controllers ASPECD Editor User Guide Provides functions to modify the user interface for Excel Operator Terminals 1 74 5577 10 US EN2B 0184 GE51 R0404 Europe INTRODUCTION CARE CONTROL ICONS Control Icon Operation Internal Parameters Dialog Box I O Dialog Box 74 5577 10 US EN2B 0184 GE51 R0404 Europe Each control icon has an I O dialog box that defines its input s and output s In addition some control icons have an internal parameters dialog box that defines parameter values that govern the function of the control icon When you first place a control icon in the Control Strategy work space the internal parameters dialog box if any displays For example for the PID icon the following internal parameters dialog box displays Proportional band Xp Derivate time TY Sec Integral action time Tn 1000 Sec Minimum output o Maximum output
205. setpoint P5 would be insufficient then software would calculate an even earlier start time P4 minimum preheat time has little or no effect At occupancy EOH reverts to a standard outdoor air compensator Switch ON time depends on the load on the system Light load switch ON time is occupancy start P4 minimum preheat time with a corresponding low discharge air setpoint Medium load switch ON time is occupancy start minus a value between P4 and P8 J H P8 P4 Occupancy Preheat Minimum at 32F 0C preheat Both the OAT and room temperature have an effect on this switch ON time Software calculates discharge air setpoint from the OAT DA characteristic default 1 6 and further modifies it with room temperature and time program room setpoint Heavy load lf the load on the system was so great that even an occupancy start time minus P8 and a maximum discharge air setpoint P5 would be insufficient then software would calculate an even earlier start time During the preheat period the OAT causes the discharge air setpoint to vary If room temperature rises above the time program setpoint software resets discharge air setpoint accordingly At occupancy start EOH reverts to a standard OAT DA compensator If room temperature is not up to setpoint by occupancy start time software resets discharge air setpoint up a corresponding amount This effect on the discharge air setpoint continues for a period of 30 minutes after occupancy sta
206. software changes the required priority to 10 for the next command Control strategy switching logic and Time Programs do not adhere to priorities with one exception This exception is when they command the point to a manual value operation status If a point is in manual status control strategy switching logic and Time Programs cannot command the point CAUTION Placing a point in manual mode using WIA can lock out even an operator command In WIA the X2 and X3 fields determine command X2 and residual X3 priority Operator priorities are fixed according to the level of the operator Operator Command Residual Level Priority Priority 3 60 point s residual is not changed 4 80 point s residual is not changed 5 100 point s residual is not changed CARE defaults residual priority to zero X3 0 so that all commands from WIA are accepted You can set WIA to leave a higher residual The following table lists attributes that you can select for the various point types Note that the default values for most of these attributes can be changed via the CARE Editors See Excel CARE User Guide 74 5587 US EN2B 0182 Europe Editors chapter for descriptions of these attributes The attributes that are not available to the CARE Editors are manual value operating status trend log alarm status auto value and hours run These attributes are accessible via operator terminals such as the Excel Building Supervisor XBS and the X1581
207. stem is shut down later 137 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Time Program Preparation 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS The following figure illustrates this relationship Po tvka early switch off hours z l l l l l l T P9 outdoor air temperature gt Parameter P10 optimum stop factor weights the influence of the control difference on the characteristic curve If Parameter P10 is zero EOV calculates early shutdown based on OAT only Adaptation of Factors For the advance calculation of the switch on point in heating cooling operation EOV uses a model of controlled operation In the heating mode Parameter P4 high speed preheat factor defines this model The factor indicates how much time is required to overcome a control difference of 1K In the cooling mode Parameter P8 high speed cooling factor defines this model The two modes require different curves because cool down and heat up occur at different rates For example in a factory the factor for rapid cool down is always larger than the factor for rapid heat up because cooling down by 1K takes longer than heating up by the same amount This effect is because the heat from machines supports heating up while it works against cooling down EOV can adapt both factors automatically to the actual circumstances This adaptation occurs when you select
208. switching Otherwise EOV uses the switching points in the Time Program EOV does not provide the setpoint and does not have an integrated controller The controller application program must provide regulation during the system shutdown phase 139 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS PID PID Function I O Dialog Box PID Operation 74 5577 10 US EN2B 0184 GE51 R0404 Europe Inputs Output Ea Proportional Integral Derivative controller that regulates an analog output based on two analog values one is a controlled variable the other a reference variable and operating parameters The controlled variable is the variable that should be held constant for example a room temperature The reference variable is the prescribed changeable value of the controlled variable for example room temperature setpoint PID controller The PID controller can also operate as a P PI or PD controller if you zero the Integral and or Derivative values in the internal parameters dialog box For more information on PID operation see the PID Operation section following this description of the inputs outputs and internal parameters Two analog inputs where X Controlled variable for example room temperature sensor W Reference variable for example room temperature setpoint You can enter the reference variable W as a parameter engineering unit index number
209. t DUC cycles the system with minimum off time P5 When zone temperature is within the comfort zone limits DUC continuously calculates off time Off time is inversely proportional to the deviation of a zone 32 CARE CONTROL ICONS DUC Example ALPHABETIC REFERENCE temperature from the setpoint Off time reaches its maximum P4 when zone temperature is equal to the setpoint that is X1 X2 X4 If X1 is not equal to X2 DUC sets a shorter off time The following formula defines this relationship a straight line y with gradient m through a known point P x0 y0 Y m X X0 y0 where m y x The following example uses this formula to calculate the corresponding equations for the actual off times This example describes off time calculation for the three types of systems heating cooling and heating and cooling Basic requirements for each system type are the same Highest zone temperature X1 73F 23C Lowest zone temperature X2 64F 18C Setpoint X4 68F 20C Temperature difference P3 7 F Deg 4K Maximum off time P4 50 percent Minimum off time P5 5 percent Cycle time P6 60 min Single stage fan These values create the following parameters Lower comfort limit LCL X4 P3 68 7 61 Upper comfort limit UCL X4 P3 68 7 75 Maximum off time in minutes tmax P4 P6 60 50 30 min Minimum off time in minutes tmin P5 P6 60 05 3 min Heating System Off Time Calculati
210. t Output ID___ Tariff VD Input 0 Use power limit P13 1 Use power limit P14 IA___Energy_Intv VA Output User address to indicate the current energy consumption kWh within the Measurement Interval window change engineering units to kWh STARTUP see Note VD Input 0 Normal operation application is not running 1 Start up operation application is running ID___Sync_failed ID___ Peak_load ID___ Shutdown ID__Off_Prio_2 74 5577 10 US EN2B 0184 GE51 R0404 Europe ID Off Prio_1 Output 0 Signal to initiate an alarm when the synchronization impulse is missing 1 Signal is not active Set Active State of this point to 1 Output 1 Signal to all XFM 36 1 S R to stop switching on the loads 0 Signal is not active Output 1 Signal to all XFM 36 1 S R to shed the loads immediately 0 Signal is not active Input Input Output 0 There is no load to switch off in priority group 1 1 There is at least one load to switch off in priority group 1 Output 0 Reset of the loads available to turn off detection for the priority group 1 Input Input Output 0 There is no load to switch off in priority group 2 1 There is at least one load to switch off in priority group 2 Output 0 Reset of the loads available to turn off detection for the priority group 2 70 CARE CONTROL ICONS ALPHABETIC REFERENCE ID___ Off_Prio_3 VD Input Input Output 0 There is no load to switch off in priority grou
211. t curve appears as you define the ranges for the Ya Yb Xa and Xb variables Eng unit Scate Toggle The arrows show which scroll bars apply to which parameters Use the following procedure to create two curves for the desired Y output 1 Enter the scale limits Ymin Ymax Xmin Xmax 2 and the engineering unit in the editing boxes 2 Click Scale to save the scale limits DO NOT FORGET to click the Scale button to save the scale limit entries 3 Define Xa by clicking the left and right arrows in the scroll bar just below the X axis As you click the value of Xa changes You can also click the gray area in 153 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS the scroll bar or click the white box thumb in the scroll bar and move it to the desired position Determine Xb by clicking the lower scroll bar You can use the same techniques as for the other scroll bar The a and b values establish the curves left and right pivot points Xb must be less than Xa RESULT The values in the boxes to the left and right of the horizontal scroll bars change A line appears in the graph to represent the curve you created Tip gt If desired you can change the Xmin and Xmax 2 values that appear at the top of the dialog box These values establish which area Xa and Xb can span Click the value in the box and type
212. t dig X x x x x Trend Threshold ana X X X X Write Protection Priority ana X X X X X X X X Hide Point dig X X x X x X x X x Referred to as Access Control for Flex Points Operational status can be 1 for manual or O for automatic tOnly applies to trend points on XI581 582 terminals not Excel Building Supervisor XBS terminals X Write access Al Analog input PAI Analog input pseudopoint VA AO Analog output PTOT Totalizer pseudopoint VT DI Digital input PDI Digital input pseudopoint VD DO Digital output 3POS Three position analog output GA Global analog GD Global digital TOT Totalizer fast or slow Flex Flex digital output with feedback multi staged and pulse_2 WIA Example See the Examples chapter for details on how to use WIA to implement floating limits and alarm suppression WIA and Global Points If you use WIA to change attributes such as alarm limits for a global receptor point operators at an XBS terminal will not see the change XBS terminals display only the values of global originator points To view values for global receptor points operators need to use a portable terminal such as the XI584 to connect to the B port of the controller that has the global receptor point 171 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Zero Energy Band ZEB Function Determine setpoints to maintain a predetermined comfort band divided i
213. t for additional load control by another software module The command ON or OFF to the load in the result of Boolean ANDing of the command of the regular XFM 36 1 S R functions as influenced by the Po input value AND the state of the RM input XFM 36 1 S R transfers this switching result ON OFF to the second output St after minimum ON or OFF time elapses 90 CARE CONTROL ICONS ALPHABETIC REFERENCE If Parameter P16 is 2 default setting input RM has no function Connect the RM input to a dummy digital flag to ensure all XFM 36 1 S R I Os are connected Display Parameter P3 indicates the current status of the second input RM A 1 value indicates that RM is ON a 0 indicates that RM is OFF The following table lists the parameters used for the second input RM functions Parameter Setting Default Number Type Description Range Value Display __ RM Input State none none Integer _ 16 Progr Feedback _Op_Mode 0 1 2 2 Integer O RM for status feedback 1 RM AND Po 2 No RM function Automatic Load Switch On after Maximum OFF Time Expiration Some electrical loads such as refrigerators or cold storage houses cannot be switched off for long periods of time or the plants or goods in them may sustain damage For these loads Parameter P12 maximum OFF time sets a limit time value Each time an XFM 36 1 S R switches off the load a timer starts to measure the time the load is OFF If the timer exceeds the maximum OFF time Par
214. t mode of operation implement a fixed setpoint of 12C 54F Use the SWI DIF and MAT control icons This example uses the TF26 temperature selector device as an external setpoint positioner The TF26 has a rotary knob for adjusting the setpoint and a switch to select mode of operation Auto Day and Night The following diagram shows the characteristic curve of the TF26 Input voltage V high not connected 12 7 39 12 3 99 0 setpoint shift K The voltage of the TF26 can move in the gray shaded areas when the potentiometer knob is turned Setpoint adjustments of degrees Kelvin can be set in the Auto and Day modes of operation In Auto and Day operation the TF26 has linear characteristic curves that are different only by their intersections with the axis In Night operation the TF26 supplies a voltage less than 0 25V The curve formula for Auto operation is auto 8 TW 7 39 12 200 CARE CONTROL ICONS EXAMPLES The curve formula for Manual operation is day 8 TW 3 99 12 Where TW is the analog point representing TF26 The following diagram represents the control loop and switching logic tables that implement this example function auto operation MAT KI auto 8 TW 7 39 12 ba i O O 0O Z O O function manual operation MAT KI day 8 TW 3 99 12 switchover auto day corr setpoint ess lt o25_ Jo corr setpoint setpoint The
215. t to be shed priority group 1 the lowest first to be shed A positive power value power to be switched ON is sent to priority group 3 first while a negative value power to be switched OFF is sent to priority group 1 first XFM 35 uses the internal user addresses ID___ On_Prio_1 2 3 and ID___Off_Prio_1 2 3 to detect the group where at least one load can be switched ON or OFF XFM 36 1 loads in each priority group set these values The power value to be switched is transmitted to the priority groups via the XFM s I Os Po1 2 3 and Po see Fig 1 at the beginning of the Power Demand Control XFM section XFM 35 switches on Priority Group 3 XFM 36 1 loads first It then switches on Priority Group 2 loads and then Group 1 loads XFM 35 sets the Priority Group 3 Po3 output to a positive switch on power value as long as the value of user address ID___ On_Prio_3 is 1 True After all loads in Group 3 are on software sends a zero value False to ID___ On_Prio_3 XFM 35 then sets the Priority Group 2 Po2 output to a positive switch on power value as long as the value of user address ID__On_Prio_2 is 1 True After all loads in Group 2 are on software sends a zero value to ID___ On_Prio_2 XFM 35 then sets the Priority Group 1 Po1 output to a positive switch on power value as long as the value of user address ID____On_Prio_1 is 1 True After all loads in Group 1 are on XFM 35 sends a zero value to user address ID__On_Prio_1 At this
216. tal pseudopoint that the controller sets to zero when power to the controller is off Power off can occur because of a restart or a power failure When power returns the controller sets STARTUP to 1 This set occurs before the controller application program starts You can define special start up procedures after a power failure or download by resetting STARTUP to zero after a complete program cycle has run You can use a switching table to set STARTUP and provide the start up action shown in the following diagram STARTUP start DDC program 213 APPENDIX B STARTUP USER ADDRESS CARE CONTROL ICONS Switching Table Example This example shows how to set the start up action for a two stage ventilator After power returns the ventilator should start in the first stage even if the Time Program that controls the ventilator requests the second stage The following diagram shows the switching logic required for this application E N 1 fan_stage 2 Te 90s ofo tmeprog stasi 1 0 timeprog_stage_2 1 STARTUP Ta 60s 0 0 STARTUP STARTUP Te 20s startup S ae YLE ET smr Gray Switching Table The switching table with the gray background defines start up action after a power failure Line 2 of the switching table contains the determining condition The controller sets STARTUP to 1 before the application program starts Because Line 2 contains a switch on delay the table transmits the
217. tch off for 90 seconds This action lets the ventilator run out The first stage switches back on only after 90 seconds This action serves the drive belt by avoiding abrupt changes in acceleration The follow diagram illustrates switching action STARTUP 1 0 1 a Cine demand stage 2 demand stage 1 tine Stage 1 time Stage 2 time 217 74 5577 10 US EN2B 0184 GE51 R0404 Europe APPENDIX B STARTUP USER ADDRESS CARE CONTROL ICONS 74 5577 10 US 218 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS INDEX 2 2PT 27 2PT example 28 A Adaptation of factors 137 Adaptation of optimization 124 Adapted heating curve 116 ADD 8 Add ADD 8 Adjust setpoint 198 Alphabetic reference 7 Analog rule 99 Analog Switch SWI 9 Attenuator example 179 Automatic Load Switch On after Maximum OFF Time Expiration 91 Average AVR 10 Average Value Calculation example 180 C CAS operation 11 CAS Plus 17 Cascade CAS 11 Cascade operation 12 Cascade Plus CAS Plus 17 CHA example 21 Changeover Switch CHA 21 Closed control loops 145 Comfort band 171 Compensation input 11 Connection of MAT icon to control icon 110 Continuous controllers 145 Continuous positioning signals 111 Control icon operation 2 table 3 Controlled section 145 Cool down optimization with room sensor 123 without room sensor 121 Cooling System Off Time Calculation
218. ted from the P4 P1 calculation Example 2 Refer to Example 1 except for the following P6 40 kW 74 CARE CONTROL ICONS ALPHABETIC REFERENCE 600 kW 40 kW 1 4 hr 181 kWh 45 kWh Possible allowed Power P4 0 1 0 25 hr 140 kWh 136 kWh 0 025 160 kW Power to be switched P4 P1 160 kW 640 kW 480 kW NOTE This example shows that a value of 40 for P6 causes more than a 40 kW difference in the shed signal to XFM 36 1 S R It is not trying to suggest that P6 introduces instability or wild shedding and restoration of loads Obviously if the P6 value were in the algorithm for a period of time the system would settle out with the lower demand setpoint Example 2 demonstrates a principle that is inherent to the Sliding Window algorithm All the necessary shedding and restoring to stay below the limit setpoint must always occur in the last calculation interval in XFM 35 the last 1 10 of the window measurement interval Where there are enough sheddable loads at least 25 percent of the total load shed and restore activity should be stable and under control However when there is a lot of activity changes in the kW consumption and only a small percentage of loads are sheddable control may be lost This can be attributed to the inability to shed loads that may be held ON by the minimum on time function or the RM override input of XFM 36 1 S R Select the Sliding Window
219. ter Enthalpy Two analog inputs X1 through X2 required where X1 Air temperature in degrees Fahrenheit 23F through 122F 5C through 50C X2 Air relative humidity in percent 0 through 100 percent rh One to two analog outputs where Y1 Enthalpy 0 100 Btu lb Y2 Absolute humidity 0 100 Ib Ib Barometric pressure psi cmne Number type Whole number Unit psi 97 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE Default 14 7 psi Range 0 through 146 psi The following diagram illustrates h x operation CARE CONTROL ICONS 030 JE z gt oe 5 AN ri 40 S 0 piae AK o S S a MIDITY RATIO e x S Z S RN n 5 y gt gt 85 O i N a A z a S 3 g K C a gs A ine Z C eo 5 2 e F016 S A O A n a2 sy 5 D oL 9 7 O a212 G zZ 70 5 gt er Q 2 01 U AN i Le o LA Se TNS Zi we xy 2 x 60 L D p irs a gt 5 E 2 m G gt i a 2 8 9 8 8 3 8 3 8 8 S Q x2 amp o M10306 74 5577 10 US 98 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Mathematical Editor MAT Function Switching Logic Example Control Strategy Example Other Examples Control Strategy MAT I O dialog box Input Output Formula Names Analog Rule When one of the co
220. the XFM parameter or the actual XFMs that are chosen XFM 36 1 can provide either sequential or rotational control XFM 36 1S provides only sequential control and XFM 36 1R provides only rotational control Never mix sequential and rotational XFM 36s in the same group XFM 36 1 S Rs St output is the start stop ON OFF signal to its load XFM 36 1 S R will respond immediately to a positive or negative value into its PO input unless one of its interval timers or the RM input prevents it To accomplish power demand XFM 35 and XFM 36 1 S R must exchange more data than only the kW values that are transferred via the Po connections Because the number of XFM inputs and outputs are limited data is exchanged via datapoints Datapoints are pseudo points which can be written to or read by XFM 35 and all the XFM 36 1 S Rs in the power demand program CARE user addresses are assigned in special datapoint dialog boxes that are accessed from the XFM I O dialog boxes by clicking on the Datapoints button The following figure shows all the inputs and outputs of power demand XFMs XFM 35 36 1 36 1R and 36 1S Datapoints are shown without any connection lines Note that some data points contain the priority group number 1 2 or 3 within the user address In XFM 35 these are part of the preassigned XFM point names In XFM 36 1 S Rs the preassigned XFM pointnames do not contain priority group numbers because it is not known in which group the XFM 36 1 S R
221. the option of changing the name These names do not appear in the controller summary If you are using several MAT functions in a plant it is useful to assign Y1 Y2 Y3 etc so they are easy to remember The names are case sensitive that is y1 is not the same as Y1 You can only use analog points in a formula See the Digital Conversion note later in this section for a technique to convert digital point information to analog for use in formulas 99 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Formula Example The following formula calculates the value of a user address called Y by multiplying the value of User_address_20 by 4 and then dividing the result by the value of User_address_ 15 Y 4 User_address_20 User_address_15 Formulas can include analog physical points and pseudopoints Formulas cannot include digital points See the Digital Conversion note later in this section for a technique to convert digital point information to analog for use in formulas The name of the formula in this example is Y Formula Entry Procedure Procedure 1 Select the MAT editor in either the Control strategy or Switching logic window In the Control strategy function click the MAT icon in the list of control icons and place the MAT symbol in one of the rectangles in the Control strategy work space In the Switching logic function click the field in the switching table that has the analog input c
222. the other parameters as explained for the P Controller 143 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE PID Controller Parameter 74 5577 10 US EN2B 0184 GE51 R0404 Europe Settings CARE CONTROL ICONS The PID controller is the fastest controller that can completely stabilize a deviation The following diagrams show the stabilization of setpoint jumps with a PID controller that is set optimally The following three graphs show the effects of all three modes on the controlled variable at system start up With proportional control Fig 1 the output is a function of the deviation of the controlled variable from the setpoint As the control point stabilizes offset occurs With the addition of integral control Fig 2 the control point returns to setpoint over a period of time with some degree of overshoot The significant difference is the elimination of offset after the system has stabilized Figure 3 shows that adding the derivative element reduces overshoot and decreases response time CONTROL POINT OFFSET T x SETPOINT Ti T2 T3 T4 T5 T6 TIME Fig 1 Proportional Control CONTROL POINT OFFSET SETPOINT Ti T2 T3 T4 T5 T6 TIME Fig 2 Proportional Integral Control 144 CARE CONTROL ICONS ALPHABETIC REFERENCE CONTROL POINT OFFSET SETPOINT Ti T2 T3 T4 T5 T6 TIME Fig 3 Proportional Integral Derivative Control 145 74 5577 10 US EN2B 0184 GE51 R0404 Europe
223. thout room sensor optimization with room sensor Optimization without a room sensor uses outdoor air temperature to determine optimum start the preheat point Optimization with a room sensor uses room control and needs a time constant and dead time to calculate the preheat point In other words this type of optimization requires a Time Program Time program setpoint default values e actual setpoint e next setpoint e time until the next setpoint The EOH function sets these values during processing via the user address If optimization in the Time Program is inactive OPTIM field the room temperature setpoint is valid for the user address and software calculates the heating discharge air temperature using the heating curve The heating curve in EOH is not adapted If you require an adapted heating curve use the HCA icon and only run EOH during the optimization of the supply temperature control During normal operation use the HCA icon for the supply temperature Optimised heating Three analog inputs X1 through X3 where X1 Room temperature X2 Outdoor air temperature X3 Room temperature setpoint via a user address Must Do gt The X3 pseudopoint must also be assigned to a time program so that EOH can access occupancy start stop times After downloading the program into the controller you must enable this user address for the Optimum program it defaults to no To enable it enter Yes in the OPTIM column
224. tion to variable time optimization as a function of the maximum allowable supply temperature P17 and minimum preheat time P4 If room temperature setpoint is not reached within the prescribed minimum preheat time P4 even with a maximum supply temperature for the preheat EOH can displace the preheat time point independently to an earlier time With this type of optimization preheat begins at the calculated point in time with the maximum preheat temperature P5 The next two diagrams illustrate this operation for day and day night operation 123 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS increase room temperature 5 00 8 00 time a time variable switch on point outdoor temp approx 41F 5C increase o gt w D 2 E o D E fe 3 00 8 00 M time variable switch on point outdoor temp approx 41F 50 You can influence the type of optimization procedure that EOH uses by adjusting Parameter P4 minimum preheat time For very small values of P4 for example zero minutes EOH only uses the variable time preheat rapid preheating because it is never possible to reach the setpoint in zero minutes regardless of maximum supply temperature Large values of P4 such as several hours have the opposite effect Large values cause variable temperature preheat with moderate supply temperatures During the
225. to leave the heating on longer maximum time is until the switch point set by the Time Program EOH calculates preheat time with room sensor tyyR with the following formula s P7 t 120 min VVR tcorr 3 P7 Where tcorr equals X1 X3 P9 in other words room temperature minus setpoint times optimum stop factor If Parameter P9 is zero the cool down optimization procedure with room sensor is the same as without a room sensor As an example assume the following values Outdoor air temperature X2 42F 5 6C Minimum outdoor air temperature P7 32F 0C Factor for early switch off P9 10 min FDeg Room temperature X1 70F 21 1C Target room temperature setpoint X3 68F 20C Advance preheat time with room sensor tuwp 120 min 70 68 10 min FDeg 42 32 wr 170 68 g 4232 tVVR 39 min without a room sensor tyy 36 min During this cool down phase EOH transmits a 1 to output YD3 This 1 overwrites the supply temperature setpoint from the application program by the flow temperature setpoint Y1 from EOH At the end of the cool down phase EOH sets output YD3 to 0 If room temperature X1 falls below the setpoint of the Time Program before the target time occurs EOH switches over to room control automatically You must use an internal PID controller which integral action time P16 and room controller multiplier P15 can be set After reaching the target time EOH still works with th
226. tribute for each pump and provides the values to SWI icons for the switchover decision Use the RIA SWI and MAT icons Control operation switches on Pump 1 when the application program demands it and estimates switch off time depending on the number of operating hours Pump 2 operation is similar The following flowcharts diagram program operation in three parts START read run hours of pump 1 read run hours of pump 2 y1 run hours pump 1 P1_difference y1 run hours pump 2 P2_ difference YES Set Status pump 1 Set Status pump 1 to 1 to 0 ess NO YES Set Status pump 2 Set Status pump 2 to 1 to 0 192 CARE CONTROL ICONS EXAMPLES P1_difference P1_difference run hours aeu H 1 P1_difference status pump 2 YES P2_difference P2_difference run hours pump 2 P2_difference 193 74 5577 10 US EN2B 0184 GE51 R0404 Europe EXAMPLES CARE CONTROL ICONS status pump 1 1 or status pump 2 0 an status P1P2 1 YES status P1 P2 1 status P1 P2 0 status P1 P2 0 and demand 1 status P1 P2 0 and demand 1 74 5577 10 US 194 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS EXAMPLES The following diagram shows the required CARE programming for this example pump 1 1 status P1P2 0 pump 2 1 fstaus PIP SSCS 7 J demand 1 status P1P2 aes status_P1 status P1P2 1 status P2
227. ture P11 Setpoint These values are only available in the controller if you enter them as parameters Using both NIPU and DUC in a system can result in command conflicts You should use switching tables to force NIPU to override DUC commands DUC does not work with fixed off times Off time duration varies as a function of the system load within limits you define The following diagram illustrates how the load corrected off time duration function operates in DUC room room temperature course temp upper comfort limit setpoint lower comfort limit time load dependent variation of switch off time with DUC ON room temperature max beyond switch OFF comfort limit off time time DUC calculates off time by comparing zone temperatures X1 and X2 with the comfort range P3 DUC calculates the comfort limits around the setpoint X4 with the following formulas Upper comfort limit X4 P3 setpoint plus comfort range Lower comfort limit X4 P3 setpoint minus comfort range If the minimum zone temperature X2 is less than the lower comfort limit or if the maximum zone temperature X1 is greater than the upper comfort limit off time is zero A zero off time lets the system operate without interruption to reach the setpoint as quickly as possible If the minimum zone temperature X2 is equal to the lower comfort limit or if the maximum zone temperature X1 is equal to the upper comfort limi
228. ugh 100 0 percent P Controller if W is NOT entered as a parameter P3 Proportional band Xp P4 Integral action time Tn in seconds Always zero P5 Minimum output in percent P6 Maximum output in percent P7 Dummy parameter This parameter usually stores integral action time It has no effect in a P controller P Controller if W is entered as a parameter P3 Proportional band Xp P4 Integral action time Tn in seconds Always zero P5 Minimum output in percent P6 Maximum output in percent P7 Reference variable W P8 Dummy parameter This parameter usually stores integral action time It has no effect in a P controller PI Controller if W is NOT entered as a parameter P3 Proportional band Xp P4 Integral action time Tn in seconds If you set Integral action time to zero in the internal parameters dialog box software sets the P4 parameter to 1 000 000 A number this large effectively disables the integral term P5 Minimum output in percent P6 Maximum output in percent P7 Actual integral action time Tn in seconds If XD1 is zero P7 is also zero If XD1 is one P7 contains the user defined value of Tn stored in P4 PI Controller if W is entered as a parameter P3 Proportional band Xp P4 Integral action time Tn in seconds If you set Integral action time to zero in the internal parameters dialog box software sets the P4 parameter to 1 000 000 A number this large effectively disables the integral te
229. ults in a well adjusted heating curve If you use a sample room to test the adaptation function make sure there is NO thermostatic radiator valve where the room sensor is installed The radiator in the sample room must always be open otherwise automatic adaptation does not function or the results are interpreted incorrectly Too frequent airing and open windows in the sample room also have a negative effect on the adaptation procedure If no room sensor is installed the controller functions as a weather compensated controller with the default heating curve setting 96 CARE CONTROL ICONS ALPHABETIC REFERENCE Humidity and Enthalpy H X Function Formula I O Dialog Box Inputs Outputs Internal Parameters Barometric pressure P3 Calculate enthalpy h and absolute humidity x as a function of air temperature relative air humidity and air pressure Use H Xwith the ECO function Absolute humidity Y2 Y2 0 622 X2 100 PDS P3 X2 100 PDS Enthalpy Y1 Y1 k1 X1 Y2 K2 k3 X1 Where PDS is the saturation pressure of water vapor in Pa units PDS k4 k5 x1 180 k1 is the specific heat capacity of dry air 0 2398 Btu lb F k2 is the heat of evaporation 1061 37 Btu lb k3 is the specific heat capacity of water vapor 0 4443 Btu lb F k4 is 0 4204 psi k5 is 0 9202 k6 is 8 00 The calculation assumes a constant air pressure which is input as an internal parame
230. until the next synchronization pulse is received Using the Trend Function of the Excel 600 80 controllers with the internal user address ID____ Syc_failed a missing synchronization pulse that might cause a power peak can be recorded When all the loads are switched off but there is still a calculated power to switch off the internal user address ID___ Man_load_shed is set to 0 to generate an alarm message for indicating the necessity of manual load shedding The alarm is canceled when the calculated power becomes a positive value When the measured energy kWh within a measurement interval exceeds 90 percent of the calculated energy limit a positive power value is not transferred to the output Po1 2 3 of XFM 35 and the internal user address ID___ Peak_load is set to 1 The loads XFM 36 1 that are Off read the value 1 of ID___ Peak_load and do not switch on until the peak load has diminished An alarm message can be triggered when ID___ Peak_load is set to 1 This peak load function is only used for the ideal curve and extrapolation calculation algorithms If the measured energy kWh used within a measurement interval exceeds 98 of the calculated energy limit a command to shed all of loads immediately is sent to all XFM 36 1 by setting the internal user address ID___ Shutdown to 1 All the loads are switched off immediately An alarm can be generated whenever ID___ Shutdown is set to 1 When the measured work is less than 98 of the
231. uotes to enclose a user address name Left bracket Right bracket Divide i Multiply Subtract Add 0 9 Numbers Decimal point See the Function Hierarchy note for the rules of order that the MAT operator follows in solving a formula The SQRT function calculates the square root of an argument For example a formula with a square root can look like this y SQRT 2 x 5 The argument must be in parentheses or brackets if it includes more than one term The controller calculates the square root function on the basis of the corresponding Taylor series and therefore requires much computer time The e x function calculates the x power of Euler s number e 2 7171 for an argument for example y e x 2 xw 5 The argument must be in parentheses or brackets if it includes more than one term The controller calculates the logarithm function on the basis of the corresponding Taylor series and therefore requires much computer time The INT DIFT LIN and POL functions are complex functions that display a dialog box for further information when you select them See the Dialog Box sections following this section for details on their operation You can use only one of these functions in a formula RESULT As you select and type items they appear in the Math Editor dialog box 4 Click OK to save a formula and close the dialog box Or click Cancel to close the dialog box without saving RESULT Software checks the formula f
232. utdown it switches off its load regardless of minimum ON time 74 5577 10 US 92 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS Start up after a Power Failure ALPHABETIC REFERENCE After the shutdown command is over ID___ Shutdown 0 each XFM 36 1 S R must again receive a positive power value at its Po input before its load is turned ON Start up action after a power failure depends on the type of algorithm in use If the Sliding Window algorithm is being used as described in the XFM 35 section power calculation continues after the power returns as if there were no interruption XFM 35 starts to switch ON the loads again as if the power demand program was starting for the first time If using the Ideal Curve or Extrapolation algorithms described in the XFM 35 section the power calculations are reset and restarted as if the whole system has its first start up After the power returns XFM 36 1 S R receives a shutdown message from XFM 35 ID___ Shutdown 1 and immediately switches off the load see General Functions in the XFM 35 section After the shutdown command is over ID___ Shutdown 0 each XFM 36 1 S R must again receive a positive power value at its Po input before its load is turned on 93 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE CARE CONTROL ICONS Heating Curve with Adaptation HCA Function I O Dialog Box Inputs Output Internal Parameters Heating cu
233. utput YD To add a hysteresis value to the control icon you must enter it when you define the 2PT control icon If you leave it at 0 0 there is no on line function later that you can use to enter a hysteresis value Hysteresis Number type Decimal Unit same as the controlled variable X Default 0 0 Range 0 through 100 0 P3 Hysteresis internal parameter Hysteresis is the difference between the response of a system to increasing and decreasing signals P4 Reference variable W if entered as a parameter not connected to a point 1 P3 0 YD 0 if X lt W otherwise YD 1 2 P3 gt 0 YD 0 if X lt W P3 YD 1if X gt W These formulas dictate the following action When the actual value is less than the setpoint minus the hysteresis the controller output switches OFF If the actual value reaches the setpoint or exceeds it the controller switches ON 27 74 5577 10 US EN2B 0184 GE51 R0404 Europe ALPHABETIC REFERENCE 2PT Example 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS The following diagram illustrates the action 1 o X W P3 w P3 Hysteresis When X lt W P3 When X gt W Yd O Yd 1 This example shows how to control a service water storage tank with one sensor Control action opens the hot water HW terminal valve and initiates the release for charging when the actual value of the hot water temperature is less than the setpoint by the amount of the hyste
234. veedueneteeedeuseveatns Miriam MIN reae EEE EE T teagan acstec EAA EA A EAA E Nig t Purge NIPU A ee rr a e i n a aeae ea net eaa OAE n Optimum Start Stop EOH Optimum Start Stop Energy Optimized Ventilation EOV 131 PID PID exces inore niese iee e edee aada i E ida ii ie 140 PID Operations s c sececesadsctasseenctteasenetersereeesecten edecoterexnaoeesavbeliphevhosbestvhcsieeaanatiess 146 PID Plus PID PIUS c c 0s cccei lester ue a a iiaea 148 Ratio RAMP eei a e eaa a eae a a a ia 153 REAd RIA cuni aen ee E e a ER R E E AANE AS eee nies 157 SEQUENCE SEQ e ee eea e raaa aae eaa Naeata a aAa eenaa Ee Raai E 160 Subtract DIF arraren aa enn aaa a a an eE AEA TATAE Ea AANE 167 Write WIA EA EIENEN A AE EAEE olaas et 168 Zero Energy Band ZEB ireren aaae eed ee aa aee a a a a aea 172 i 74 5577 10 US EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS EXAMPLES APPENDIX A PARAMETER LIST DESCRIPTION APPENDIX B STARTUP USER ADDRESS 74 5577 10 US EN2B 0184 GE51 R0404 Europe CONTENTS a de tueneed saudat cu tanacen siuenetncacdesGacagat cuetexsusuatesteccactysurwonescudut ev cauwaces atuceedeucsesvatar ens 179 Attenuator eee ccieccetescenetics chdseege caneerelinivetige eweuacedandecegecealueeuvigaduntseeumeyedgetoeugeceteereee 181 Average Value Calculation cccccccsecceceeeeeeeeceeeeeeeeeeeeeaeaeeeeeseseseaeaeeeeeeeeeeeees 182 Floating Limits and Alarm Suppression ceecsceeeeeseeee
235. xample a switching table Type abbreviations DI Digital input VA Virtual pseudo analog DO Digital output Datapoints Button Click this button to display the Datapoints dialog box for XFM 36 1 36 1S or 36 1R Click on Set for each XFM Pointname CARE automatically creates user addresses with the same names Edit the user names that require a priority group member 1 2 or 3 Later sections describe how to use these points depending on operation desired The table following the dialog box summarizes user address types and functions Datapoints from XFM 36 I O Dialog Box Datapoints From XFM xfm_36 1 csd CARE User Address IA Dff Index P l __On_Index_P ID Off_Prio ID___On_Prio ID___ Peak_load ID___ Shutdown 74 5577 10 US 84 EN2B 0184 GE51 R0404 Europe CARE CONTROL ICONS ALPHABETIC REFERENCE Input User Address Type Output Comment ID___ Rotating_P Input 0 Load switching is on sequential operating mode in the group XFM 36 1 only Load switching is on rotating operating mode in the group not with XFM 36 18 IA___Off_Index_P Input The greatest switch off time of all previous loads and this Output load if Output in the group if load switching is rotational No function if load switching is sequential ID___Off_Prio Input 0 All previous loads and this load if Output in the group are Output OFF Sie 1 There is at least one load in the group that is ON ID___On_Prio Input 0 A

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