User manual - Ascon S.p.A.
Contents
1. affected by the Timer function Timer launch 4 Setpoint a Process variable PV Output OP D Counting start time timer launch time end with control output forced to zero The time counting starts when the timer is launched At the end the control output is forced to zero 1 Timer launch Process variable PV Output OP 1 When the Timer is not running the control output is forced to zero also before the Timer launch E No control action during the counting time The time counting starts when the timer is launched and the control output is forced to zero At the end the control action starts Timer launch Process variable PV Output OP F Control action with stand by Setpoint during the counting time The time counting starts when the timer is launched and the control action use the Stand by Setpoint At the end the control action use the working Setpoint Mod 7 Timer launch Process variable PV Setpoint Output OP Features aes at 25 C T envir temp Descnption By means of the confiurguration tools is possible to choose Total the type of input the type and functionality of the alarms configurability the type of control input the type of output the type of Setpoint control parameter values Common A D converter with resolution of 50 000 points Update measurement tim2. inearised PV or SP mas Soft start ol irer Time tani tienen Oa o Time duration starting from the 0 gt Time constant in sec of the RC input fil bla to oban a poweron of the Soft start function e SttM gt Time te apple me BVinpuE to reverse scale 800 1200 1600 Power on inhibited the filter is bypassed m Special parameters description Table of special function parameters if option installed In order to have the above functions the product code digit E must be 2 For example mod D3 3100 2000 To improve the instrument performances and to reduce the wiring and installation costs two special functions are available Start up Timer This functions is disable with Heat Cool control Selecting Timer or Start up the Soft start func tion is disabled therefore the parameters StTM St OP will not be enabled 1 To select these two functions to use set the parame ter as in table 1 Timer Start Up operating mode t Mod This parameter defines see table 3 Timer and Start Up Mnemonic Factory code Parameter description Range Unit setting Notes t Mod Timer Start up operation mode see table 3 0 tAct Timer action see table 4 0 tMode to 1 time Timer setting 1 9999 sec min 0 5 S P Sb Standy By Setpoint SP L SP H 0 For tMod 7 t h SU Start Up hold time 0 500 min 1 S P SU Start Up Setpoint SP L SP H 0 OP HS Control output high limit 5
3. 0 100 0 output 100 0 Start Up function Setting tMod tol The Start up function includes three phases Three parameters are associated to the Start up func 1a Limy tion 2a Hold t h S U Start Up hold time The control output is limited to the OP HS _ The process variable is maintained to the Start up Setpoint for the time fixed by the When the count starts parameter th S U The state of the control output at the end of the count S P S U Start Up Setpoint 2 Toselect the Start Kpt t n select 1 dii 3rd of When the L h S U time is elapsed the EE Ber ner OP HS Control output high limit process variable is maintained to the wor 3 To select the Timer function select the value from 2 king Setpoint to 6 and use alarm AL3 output OP3 configured with Parr FOIE There are two possibilities configuration code Q 0 P Setpoint SP int SPSU Example conf 1 L M N 0 P I R 2 A Start Up Setpoint 5U lower thant the local Table 3 Setpoint The Hold phase starts when Timer Start up counting mode Cie See aa A ZS the process variable Py achie Disabled o A NN a ee eee ves the SP SU with a tole Start up function 1 rance of 1 digit Counting start time End mode Isec min i B Start Up Setpoint SP SU gt When inside the band Control mod
4. 3 3 3 7 double action Water cool output 6 tive high C R Pt13 Rh Pt IEC584 0 1600 C 32 2912 F 0 7 i Deviati _active hig 444 ee Oil cool output 7 eviation tive C B Pt30 Rh Pt6 Rh IEC584 0 1800 C 32 3272 F 0 8 E ac IVE low 5 55 TC N Nicrosil Nisil IEC584 0 1200 C 32 2192 F 09 Output configuration N Band _ active out 6 6 6 TC E NiL0 Cr CuNi IEC584 0 600 C 32 1112 F 10 Single Action Double action _active in 777 TC NENiMo18 0 1100 C 32 2012 F 11 elay Heat Relay Cool Relay 0 TC W3 Re W25 Re 0 2000 C 32 3632 F 12 SSR drive Heat Rel ay Cool SSR Drive 1 a 5 s Analogue Heat SSR Drive Cool Relay 2 Setpoint type R C W5 Re W26 Re 0 2000 C 32 3632 F 13 Heat Relay Cool Analogue 3 Local onl 0 Dc input 0 50mV Engineering units 14 i Heat Analogue Cool Relay 4 y Dc input 10 50mV Engineering units 15 Valve drive Heat SSR Drive Cool Analogue 5 Local and 2 tracking stored Setpoint 1 Custom input range 1 6 Heat Analogue Cool SSR Drive 6 Local and 2 Stand by stored Setpoint 2 mi Standard parameters description Table of standard parameters The parameters shown in the table are divided into groups which work in the same way Below they will be described as they are listed in the table Configuration IL Digital input function Table 1 Parameter description Not used PV measure hold Auto Man
5. Ist stored Setpoint 2st stored Setpoint Run Timer unit Engineering units Table 2 Parameter descr Parameter descr C degree Centigrade A Ampere F degree Fahrenheit bar none psi mV millivolt Rh V Volt pH mA milliampere Setpoint SP A1S P AL1 AL2 AL3 threshold A2S P Alarm occurrences of OP1 0P2 and OP3 outputs respectively linked to A3S P_ AL1 AL2 and AL3 The range of the alarm threshold correspond to the whole span and it is not limited by the SP Setpoint span SL u Setpoint ramp up Setpoint ramp down rump up This parameter specifies the maximum SLod rate of change of the SP in digit min Alvi The SP value is reached according to p down A the configured rate of change The new SP value is called Target SP avail able via serial communications Example A 350 350 Setpoint Target Setpoint 10 digit minutes 250 0 t 10 is When the parameter is OFF this function is dis abled and the new Setpoint is reached immedi ately after being entered Setpoint low limit and Sepoint high limit Low high limit of the Setpoint value Instrument range SP H_ High limit Low limit Setpoint range A SP 1 SP 2 1st stored SP 2nd stored SP Values of the two Setpoints that are activated by mean of digital input or communications parameters If configured with Tracking the previou
6. assigned through the configuration procedure to digital input The configured function is activated when the digital input free voltage contact or open collector output is in the On state closed It is deactivated by setting the input to the Off state open The activation of the function through the digital input has the highest priority than through the keypad or through the seri al communications Technical specications P Commands Features Ae Auto M anual at 25 C T envir temp Description OP1 0P2 SPST Relay N O 2A 250V for resistive load ioni tswitching between AUT outputs SSR 1A 250V for resistive load The bumpless action is present switching E el UTO Too meet the double isolation requirements OP1 and OP2 must have the same load voltage MAN and vice versa with the parameter OP3 output SPST Relay N O 2A 150V for resistive load AUTO E MAN AUTO OP4 output Logic not isolated 0 5V 10 30 mA max S le A SP PV sa p OP5 output opt Control or PVSP retr Galvanic isolation 500 V 1 min Res 12bit 0 025 Accuracy 0 1 4 20 mA 750 amp 15 Vmax EARE ay et a Hysteresys 0 1 10 0 et get ane ii E 100 output OP OPMAN OPAUTO PS Active high Deviation threshold range a V oF satiny OP setting ty _______________ Action type Band threshold 0 range n Oe A AL1 AL2 Active
7. is possible to configure C The blocking function on start up OP H Control output high limit A The type and the operationg condition of the alarm D Loop break or sensor break control output lt specifies the maximum value the control B The functionality of the alarm acknowledgement OPHe Output can be set i cooloufput S Parate parameters for both heat and cool A Alarm type and function outputs limitation are available Absolute alarm Deviation alarm Band alarm S Out Output safety value SP On Active SP On Active Output Value in case of input anomaly high out a Active MV tM Travel time in It provides the time required to the valve to go from the J 5 0 position to 100 low range high range low range high range low range high range alarm threshold alarm threshold alarm threshold MV hy Minimum step It specifies the minimum allowed time of activation of the output to a valve that produces a sensible effect It is B C Latching and blocking enable related to the deadband of the valve AlL b ALI AL2 AL3 i Alarm acknowledge function l Start up disabling A2Lb latching and blocking The alarm once occurred is maintained d bnd Dead band 2 For each alarm itis pos until to the time of acknowledgement The Ramp down lt is the zone where it is possible to separate or overlap A3L b sible to select the fol acknowledge operati
8. protocol 1200 2400 4800 9600 bit sec 3 wires The outputs are switched to the OFF via serial communications eel 24V 20 30mA max for external transmitter supply A The outputs lock unlock is maintained in Supply 7 r case of power failure M input Detection of out of range short circuit or sensor break with automatic activation of the gasure impu safety strategies and alerts on display Operational Control output Safety value 100 100 Safety Parameters Parameter and configuration data are stored in a non volatile memory for an unlimited time Outputs lock Power supply 159 9 A 159 9 Power consumption PTC protected 24V 15 25 50 60Hz e 24V dc voltage 15 25 3W max Saf EN61010 1 IEC1010 1 installation class 2 2500V pollution class 2 General 8 Jinstrument class i AIDE compatbity Compliance Y me CE standards Protection Terminal strip IP20 E Dimensions Pitch 22 5 mm depth 114 5 mm with 53 Serial communications connection example Configuration D3 E x Configuration Cd Rom RS485 i Ge For SCADA Local control Warranty PC with 0P30 Wi r t je e warrant that the products will be free from Autotie nel ocona defects in material and workmanship for 3 years D3 31 max instruments D3 31 max instruments corea from the date of delivery jE F EE EER The warranty above shall not app
9. units low range SP H Setpoint high range SP L high range engineer units high range SP1 Iststored Setpoint PV range engineer units mses SP2 2nd stored Setpoint PV range engineer units oe SP Setpoin PV range engineer units ae Control mode Mnemonic Factory Algorithm code Parameter description Range Units setting Notes Type hy Control output hysteresis 0 1 10 00 range 0 5 On Off tune Tune run stop Start stop P b Proportional band 0 5 999 9 range 5 0 ti Integral time OFF 0 1 100 0 min 5 0 td Derivative time OFF 0 01 10 00 min 1 00 O C Overshoot control 0 01 1 00 1 00 Setting 1 is disabled M res Manual reset 0 0 100 0 outpu 5 0 Without integral time PID d err Error dead band OFF 0 01 10 0 digit inhibited tc Cycle time 1 200 sec 20 Time proportional only OP H Control output high limit 10 0 100 0 outpu 100 0 S Out Output safety value 0 0 100 0 outpu 0 100 0 100 0 Heat Cool Mv tM Motor travel time 15 600 sec 60 Valve MV hy Minimum output step 0 1 5 0 outpu 0 5 drive dbnd Dead band 10 0 10 0 outpu 0 5 rC G a Cool relative gain 0 1 10 0 1 hy C Cool output hysteresis 0 1 10 0 range 0 5 On Off only aa t c C Cool cycle time 1 200 sec 20 Time proportional only OP HC Cool control output high limit 10 0 100 0 ouput 100 0 PID only A Man Auto man selection Auto Man Auto Alarm and auxiliary Mnemonic Factory code Parameter description Range Units setting Notes A
10. up Setpoint or if the operating mode changes to manual the Start up function passes to the Off phase Timer counting modes A Counting start time inside the band end in control B Counting start time inside the band end with con S P SB Stand by Setpoint mode trol output forced to zero tMod PH a only for 7 SP L SP H The time counting starts only when the error is insidea The time counting starts only when the error is inside a 1 a band The control action is not affected by the 1 digit band At the end the control output is forced to Table 4 Timer function zero i Timer launch 2 Timer launc 3 vor 0P3 time Time units Starting mode status 1 Value Setpoint ___ Setpoint NE aT it Ko Manual by serial off 0o T A ait O ET dit communications On 1 Process Process Seconds Automatic Off 2 variable PV variable PV atthe power on 2 On 3 Manual by serial off 4 es f communications On 5 mS Automatic Off 6 at the power on 2 On 7 1 If used by Timer 2 Using this selection manual starting mode is possible too 1 When the Timer is not running the control output is forced to zero also before the Timer launch Special function parameters description Technical specifications Timer function mode C Counting start time timer launch time end in control mode The time counting starts when the timer is launched The control action is not
11. 2 P AL3 m ae Absolute threshold whole range 0 ion mi P Alame Sensor break Heater break and Loop break detection i Special functions Acknowledge latching activation inhibit blocking An case of power failure the AUTO MAN status Connected to Timer or program if options installed and the output value remain stored in the l controller memory Local Up and down ramps 0 1 999 9 digit min OFF 0 Setpoint Local plus 2 stored with tracking or Stand b LOW limit from low range to figni limit p g Y High limit from low limit to high range Timer starting Automatic start at the power on Digital inputs or serial comm s Timer Setting time 1 9999 sec min Special Stand by Setpoint SELD lt SF gt 51H Depending on the Timer action tAct selection functions 7 T D a noe there can be two different starting ways option Start Start up Setpoint a awe SP gt SLH Automatic at the power on Up Hold time 500 min Manual by digital input ial nications Control output high limit 5 0 100 0 anual by digital inputs or serial communications i The Timer function can b rted or stopped any time Fuzzy Tuning The controller selects automatically the best method One shot Auto tuning e Timer function can be started r Stopped any one shot according to the process conditions One shot Natural frequency Output lock pu Man Standard with bumpless function digital input or serial communications E Serial comm s RS485 isolated Modbus J bus
12. 5 999 9 Integral time I 01 100 0 min Derivative time D 0 01 10 00 min OFF 0 Error dead band 0 1 10 0 digit Overshoot control 0 01 1 0 ince act ii Man alreset 0 0 100 0 Single action PID algorithm Cycle time Time proportional only 1 200 sec Control output high limit 10 0 100 Control mode soft start output value 0 1 100 0 OFF 0 Output safety value 0 0 100 0 100 0 100 0 for Heat Cool Control output hysteresis 0 1 10 0 On Off algorithm Dead band 10 0 10 0 Relative cool gain 0 1 10 0 Double action PID algorithm Cycle time Time proportional only 1 200 sec Heat Cool Control output high limit 10 0 100 0 with overlap Cool output hysteresis 0 1 10 0 Motor travel time 15 600 sec Valve drive PID algorithm without Motor minimum step da 0 1 5 0 feedback potentiometer Digital input commands Function Performed operation Notes e Of d e On None Not used PV measure hold Set manual mode 1st stored Setpoint T Timer 2nd stored Setpoint Normal operation PV is hold Automatic Manual Local Ist SP Local 2nd SP _ Timer Start The value of PV is frozen at the time the digital input goes to the close state The permanent closure forces the chosen stored value Setpoint modification is not possible The impulsive closure selects the stored value Setpoint modification is allowed The impulsive closure is enough to start the Timer A function is
13. Accessories I l The product code indicates the specific hardware coniguration of Configuration L M N o P Q R 15t part 2nd part F A i F Serial communications Special function g the instrument that can be modified by specialized engineers only CanBus 3 Not fitted 0 Line DP EY RS 485 Modbus bus SLAVE 5 Start up Timer 2 Ouput OP1 0P2 Options DJ User manual F Relay Relay 1 None 0 Italian English std 0 SSR SSR 5 Valve drive output 2 French English 1 Analogue output 5 German English 2 Valve drive output Analogue output retr 7 Spanish English 3 Input type and range mL TR Pt100 IEC751 99 9 300 0 C 99 9 572 0 F 0 0 Control mode M Alarm 1 type and OPQ TR Pt100 IEC751 200 600 C 328 1112 F 0 1 ON OFF reverse action 0 function AL 1 2 3 TCL Fe Const DIN43710 0 600 C 32 1112 F 0 2 ON OFF direct action 1 Disabled or used by Timer gg g TC Fe Cu45 Ni IEC584 0 600 C 32 1112 F o 3 PLD single reverse action 2 only for AL3 TCT Cu CuNi i 1 200 400 C 328 752 F oa PLD single direct action siit 3 Sensorbreak LBA 111 TC K Cromel Alumel IEC584 0 1200 C 32 2192 F 0 5 PID ON OFF cool output 5 Absolute active nigh 22 2 C S Pt1O Rh Pt IEC584 0 1600 C 32 2912 F 0 6 active low
14. O C Overshooot control This parameter specifies the span of action of the overshoot control Setting lower values 1 00 gt 0 01 the overshoot generated by a Setpoint change is reduced The overshoot control doesn t affect the effectiveness of the PID algorithm Heat output Cool output o 22 Cool output T 50 0 PID outpu 0 100 a 0 100 50 0 PID outpu B Heat Cool actions overlapped d bnd_ negative 10 0 0 D On Off Cool action Setting 1 the overshoot control is disabled M res Manual reset This specifies the control output value when PV SP in a PD only algorithm lack of the integral term d err Error Dead Band Inside this band for PV SP the control output does 100 NE 100 100 hy C Cool output not change to protect the actuator 100 50 0 100 output Stand b PID output PID otp v output t c Control output cycle time control output It s the cycle time of the time proportioning Alarm occurances of OP1 OP2 OP3 outputs respectively linked to AL1 AL2 AL3 ut control output The PID control output is cool output cei 2 the pulse width modulation of The relay SSR output OP1 OP2 and OP3 can be used as alarm outputs only if they are not used as control outputs e waveform PORNS For each alarm
15. d m E E WE 455 D a D3 line ASCON spa User manual Table of contents Resources Model code ISO 9001 certified Description and table of standard parameters Description and table of special function parameters Technical specifications Resources Main universal input w Prio a eA g eap itl input option nn Setpoint ASCON spa 20021 Bollate Milan Italy Tel 39 02 333 371 Fax 39 02 350 4243 http www ascon it e mail info ascon it IL sa Digital input IL function TAR HOLD kele ppp A DIN rail mounting double action controller with analogue output D3 line User Manual M I U D3 3 03 04 Cod OP1 1 a HE OP2 l E a HE OP3 i E OP4 f gt E option Modbus RS485 Parameterisation Supervision N OA A Aa UU N rPe e o Fuzzy tuning with automatic selection One shot a Auto tuning noe oooco osss ca 5gig wwe a wava morare Pirereei ty meman EP mead NOOSY ods Operating mode Control a oP1 OP2 OP3 oP4 1 OP2 OP3 OP5 1 OP2 OP3 OP1 0P2 OP3 OP1 0P4 OP2 OP3 Double OP4 OP2 OPI OP3 action QP1 OP5 OP2 OP3 OP5 OP2 OP1 OP3 OP5 OP4 OP1 OP2 OP3 Valve OPI OP2 OP3 CE J30 478 1AD3 EF Retransmission PV SP E 5 5 0P5 OP5 OP5 OPS One shot ee Natural frequency Model code Mod Line DE HT Basic
16. e 0 2 sec characteristics Sampling time 0 5 sec Input bias 60 60 digit input filter 1 30 sec OFF 0 Accra 0 25 1 digit per termoelementi Between 100 240V ccuracy 0 1 1 digit per mA e mV the error is minumal Resistance o 2 or 3 wires Max wire Res thermometer P 0 C connection 20Q max 3 wires for AT R1 R2 Burnout Sensitivity 0 35 C 10 E T must be lt 320 Q C F selectable with any combination lt 0 35 C 10Q Wire Res Anput it ae B B N E W3 W5 Internal cold junction Line reg max IEC 584 compensation con NTC Input drift Thermocouple Rj gt 10MQ Error 1 C 20 C 0 5 C lt 2uV C Env Temp C F selectable Burnout lt 5uV 10Q Wire Res 4 20mA 0 20mA Burnout Engineering units DC input current with external shunt 2 5Q Conf decimal point position Input drift Rj gt 10MQ ni acak 999 9999 lt 0 1 20 C Env Temp Full Scale 999 9999 lt 5uV 10Q Wire Res 10 50mV 0 50mV i ai DC input voltage Rj gt 10MO min range of 100 digits Digital The closure of the external contact produces Auto Man mode change Stored Setpoints activation input any of the following actions measure hold Timer activation if options installed ested 1 single or double action P D loop or ON OFF with 1 2 or 3 alarms Algorithm PID with overshoot control or On off PID with valve drive algorithm for controlling motorised positioners Proportional band P 0
17. e 2 T Limy 2 Hold 3 off T Limy gt kt 3 Off greater or equal to the local Output to 0 3 Setpoint Control mode 4 A When lauched Output to 0 5 on When the process variable PV When launched pv rae TE l achieves the local Setpoint Control disabled cure Ee lt lt lt ____ SEDOM SRE with a tolerance of 1 digit the Start up function passes When launched lamno 023 MOn stand by Setpoint Output tog 7 mi directly to the Off phase ea ie If at the controller power on the 1 Limy 3 Off 1 Limy 3 Off process variable PV is greater 4 If Timer function is selected it will show the parame ter above tAct Timer action By this parameter can be defined see table 4 the time units the starting mode the OP3 status when the timer is running When the timer is not running the OP3 takes the oppo site status Timer setting time Timer 1 9999 sec min than the lowest between the SP SU and the working Setpoint the next phase Hold or Off will be executed instead of the Limy phase Whether the process variable for any reason e g load change decreases at a value lower than OP HS 40 digits the Start up function starts again from the Limy phase When the Start up is in Hold phase if the local Setpoint becomes lower than the Start
18. lhy AL1 hysteresis 0 1 10 0 range 0 5 The same parameters are available for AL2 AlLb Latch and blocking alarm functions none Ltch Bloc LtbL none and AL3 alarms t Lba LBA delay OFF 1 9999 sec inhibited OFF sensor break St OP Soft start output value OFF 0 1 100 0 ouput 0 5 t mod OFF only St tn Soft start activation time 1 9999 sec 1 Only if sT OP different than OFF t Fil Filter time costant OFF 1 30 sec inhibited In Sh Input shift OFF 60 60 digit inhibited Addr Communications address 1 247 247 rt lo Retransmission low range PV range engineer units wens If OPS output is present and not configu rthi Retransmission high range PV range engineer units aoe red as control output Control mode tune Automatic tune The Fuzzy Tuning determines automatically the best PID term with respect to the process behaviour The controller provides 2 types of one shot tuning algo rithm that are selected automatically according to the process conditions when the operation is started A STEP respose End of the tuning operating and setting of the new calculated terms Tuning start Setpoint change PV variable Control output This type is selected when at the start of the autotune operation the PV is far from the Setpoint of more than 5 of the span This method has the big advantage of fast cal culation with a reasonable accuracy in the term calculation m2 B Nat
19. ly for any failure 3 mni caused by the use of the product not in line with RS485 mis RSAB5 the instructions reported on this manual mmmn mn
20. on is performed by ASP Disable the heat and cool actions lowing functions serial communications SP w Relati TE After this operation the alarm leaves On It lt n t 7 a S5 aio cool acti None the alarm state only when the alarm permits to adjust the proportional cool action latching condition is no longer present Start up a blocking Ramp up Auxiliary both latching and blocking RE Ca D In Sh_ Input shift ul Taa i 7 D Loop Break Alarm LBA or sensor break On This value is added to the measured PV input value Its effect p off is to shift the whole PV scale of up to 60 digits LBA delay t Lba Setting a value between 1 and 9999 sec Start up Addr Controller address Setting none the alarm works as LBA Sensor ASP Threshold SP trange the alarm works as Sensor break with break with delay The address range is from 1 to 247 and must be unique for immediate action each controller on the communications bus to the supervi Sor When the cause of the alarm disappears the alarm status stops OP5 Retransmission output if option installed Soft start control output function Input digital filter When OP5 output 99 4 retr 4 20 StOP Soft Start value 100 OP eal Bea and hot MA aro RY Value of the control output during the gan ie trol output it Fetel 800 Soft start activation time line transmits rtHi 1200 StTM Soft Start activation i
21. s Local Setpoint value will be lost when the stored Setpoint is selected If configured with Stand by the Local Setpoint value will not be lost when the Stand by Setpoint is selected It will operate again when back to Local Configuration Mnemonic Factory code Parameter description Range Units setting Notes IL Digital input function IL see table 1 not used Unit Engineering unit see table 2 none Sc dd_ N of decimals 0 3 0 linear scale only Sc Lo Low range 999 9999 engineer units Low range inimum range 100 digit Sc Hi High range 999 9999 engineer units High range Prot Communications protocol M bus bus M bus baud Baud rate 1200 2400 4800 9600 baud 9600 retr Output range 0 20 4 20 mA 4 20 if output OP5 option is present rtH Retransmitted signal PV SP PV unless used as a control analogue output Setpoint Mnemonic Factory code Parameter description Range Units setting Notes A1S P AL1 alarm threshold PV range engineer units 0 It is not enabled if the controller has been A2S P AL2 alarm threshold PV range engineer units 0 configured with alarm n 2 not active or of A3S P AL3 alarm threshold PV range engineer units 0 sensor break type SL u_ Setpoint ramp up OFF 0 1 999 9 digit min inhibited With GFF the new Setpoint is reached SL d Setpoint ramp down OFF 0 1 999 9 digit min inhibited immediately after being entered SP L Setpoint low range low range SPH engineer
22. ural frequncy Setpoint change 3 End of the tuning Tuning start operating and setting of the new calculated terms Control output This type is selected when the PV is close to the SP Setpoint This method has the advantage of a better accuracy in the term calculation with a reasonable speed calculation The Fuzzy Tuning determines automatically the best method to use to calculate the PID term according the process conditions Standard parameters description follows Control mode follows Heat Cool control p B Proportional band This parameter specifies the proportional band coeffi cient that multiplies the error SP PV By a sole PID control algorithm the controller handles two different outputs one of these performs the Heat action the other one the Cool action It is possible to overlap the outputs A Heat Cool actions separated C Cool action adjusting ti Integral time Pe o POA ifs the integral time value that specifies the time d bnd positive 0 10 0 Example with different relative cool gains required by the integral term to generate an output 100 100 equivalent to the proportional term When Off the integral term is not included in the control algorithm t d Derivative time It is the time required by the proportional term P to repeat the output provided by the derivative term D When Off the derivative term is not included in the control algorithm
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