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1. 1 JIJ IIIJ uui UN O O R Tc R 20 5 52 53 54 55 RW 9 COL NW 56 57 58 58 60 6 62 63 64 65 66 67 68 69 70 7 72 73 74 6 Col RW 15 76 OpypU O OJO O UOJOJO O JO O O JO JO O OJO O OJO O OJO O OJO O OJO O O O 28 EVD 030220227 rel 2 1 12 06 2008 3 6 5 EVD4_UI user interface The EVD4_UI user interface 15 based on the CAREL supervisor protocol and 15 designed for the easy and intuitive reading or configuration of the control parameters The program can be started in different configurations so as to display the set of parameters that is suitable for the type of installation the EVD4 is used in to do this make the connection using the name of the required configuration EVDS00 USER INTERFACE USER PANEL mine mint EVD version 1 FE 2 Firmware rev EEV driver Hardware rer 00 CONTROLLER MODE TYPE Princi Advanced Advanced 11 System Fig 3 27 The interface configuration for the positioner function is shown in Fig 3 21 and Is activated by making the EVD4_UI stand alone connection as described in APPENDIX INSTALLING AND USING THE EVD4_UI PROGRAM 3 6 6 Start up After having connected the EVD4 as described in 3 5 1 connect the service serial port to a PC via the special converter and configure the parameters and the address using according to the application and or sy
2. Ptiooo 150 S4 current at 100 O 4 20 mA voltage at 1 kQ 0 10V Digital inputs ID1 and ID2 controlled by voltage free contact or transistor have a no load voltage of 5 V and deliver 5 mA short circuited Digital output OC open collector transistor max no load voltage 10 V max current 10 mA Relay output normally open contact 5 A 250 Vac resistive load 2 A 250 Vac inductive load PF 0 4 WARNING All analogue inputs except for S4 V the digital I O and the serial port not optically isolated refer to the GND earth Fig 3 and consequently the even temporary application of voltages higher than 5 V to these connectors may cause Irreversible damage to the controller Input 4 V can tolerate voltages up to 30 V As GND is the common earth for all the inputs this should be replicated on the terminal block with low resistance connections for each input used The GNX earth for the serial connection Is electrically connected to the GND earth The product complies with Directive 89 336 EEC EMC Contact CAREL if specific disturbance occurs in the configuration used If the connection to the motor is made using a shielded cable the cable shield and the channel marked by the earth symbol on the 6 pin connector must be earthed as near as possible to the EVD400 Valve table Model Step min Step max Step dose Step s speed mA pk mA hold du AREL E2V 30 borlan SEI 0 5 20 70 porlan SEI 30 70 porlan SEH 50 250 70 Ico EX5 EX6 70
3. REGISTER R _ y 1a REGISTER R gw REGISTER L RW 2 REGISTER RW 3 L RW REGISTER L RW 5 REGISTER RW 6 REGISTER REGISTER L RW 8 REGISTER RW 9 REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER RW 50 REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER RIV se REGISTER REGISTER Un ON NS2 EVD 030220227 rel 2 1 12 06 2008 128 129 150 151 132 155 154 135 156 157 138 139 140 141 142 143 144 145 146 147 148 149 150 163 164 165 166 167 168 169 170 17 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 195 194 195 196 197 198 199 200 201 202 205 204 205 206 207 208 209 210 211 212 215 214 215 2i 216 217 RW 60 REGISTER RW 218 219 220 221 RW 222 RW 68 REGISTER RW 223 RW 69 REGISTER RW 224 225 226 227 228 229 230 23 LR 7 C R OR B COL R LR 9 COL R p aa e LR 2 R j JD
4. Ico EX7 70 Ico EX8 330 step s 330 500 170 Ico EX8 500 step s 500 00__ 500 70 anfoss ETS 25 50 70 anfoss ETS 100 70 O CAREL E2V P 45 1_ Danfoss ETS 250 400 70 Table of refrigerants consult the electronic expansion valve technical documentation to check the complete valve driver system compatibility with the chosen refrigerant n R number operating temperature n number operating temperature R2 71290 150196 Ri34 8 R600 50790 Ra 9 R600a 50190 10 R77 60170 R744 50731 IR507c_ 12 R28 201T 145 13 RO70 60T90 EVD 030220227 rel 2 1 12 06 2008 ojojo n 0 2 3 4 5 6 8 9 oO UN oO 1 1 5 TROUBLESHOOTING The following table lists a series of possible malfunctions that may occur when starting and operating the driver and the electronic valve These cover the most common problems and are provided with the aim of offering an initial response for resolving the problem Problem Cause Solution Check that the pressure and the temperature measured are correct and that the position of the probes is correct value Check the correct range of the pressure probe Check the correct electrical connections of the probes Check and correct the parameter relating to the type of refrigerant Check and correct the valve type parameter Check the movement of the valve by setting manual control and closing and opening it completely If re
5. N Consult the electronic expansion valve technical documentation to check the complete valve driver system compatibility with the chosen refrigerant Secondary Ch low Superheat Recommended value 2 C with superheat set point greater than 4 C If the superheat set point is lower the low superheat threshold must also be reduced guaranteeing a difference of at least 2 C between the two Low SH int time Recommended value 1 0 seconds with a threshold of 2 C If the threshold is lower the time must also be reduced to 0 5 seconds N B A value of 0 zero seconds completely disables the protection LOP cool mode Recommended value from 5 C to 10 C below the typical minimum saturated evapo ration temperature of the installation Example for chillers with a rated evaporation temperature of 3 C and a minimum tolerated evaporation temperature of 1 C set the LOP Limit to 6 C LOP integral time Recommended value 2 seconds to be increased to approx 10 seconds if the action Is too intense excessive opening of the valve as a response to low pressure and reduced to 1 second if the action is insufficient excessively low evaporation temperature N B A value of 0 zero seconds completely disables the protection MOP startup delay Recommended value 60 seconds however the changeability of the starting dyna mics of different units means the time needs to be optimised in the set time the evaporation pressure must fall belo
6. NB consider double CH Proportinal Gain in case of Inverter or Stepless Compressor Chiller low temperature Sporlan 0 5 20 Alco Ex7 10 Sporlan 30 Alco Ex8 Danfoss ETS 25 Sporlan 50 250 45 5 Alco Ex5 6 6 Sporlan 0 5 20 Alco Ex7 12 Sporlan 30 Alco Ex8 Danfoss ETS 18 Sporlan 50 250 35 CAREL E2V 3 NB consider double CH Proportinal Gain in case of Inverter or Stepless Compressor Cold room packaged Sporlan 0 5 20 Alco Ex7 10 Sporlan 0 5 20 Alco Ex7 10 Sporlan 30 Alco Ex8 Danfoss 70 1 ETS 25 Sporlan 50 250 45 0 Sporlan 30 Ex8 Danfoss 0 CAREL E2V B ETS 18 1 Sporlan SER 0 5 20 T Sporlan 50 250 55 Cold room centralized 2 Sporlan SEI 30 3 Sporlan SEH 50 250 z 4 Alco EX5 EX6 S S 5 Alco EX7 6 Alco EX8 330 step s gt S 7 Alco EX8 500 step s ai Air conditioner 8 Danfoss ETS 25 50 9 Danfoss ETS 100 h NB consider double CH 0 CAREL E2V P Bi Sporlan 0 5 20 Alco Ex7 8 Proportinal Gain in case Danfoss ETS 250 400 Sporlan 30 Alco Ex8 Danfoss of Inverter or Stepless gt 12 Custom ETS 18 Compressor Sporlan 50 250 35 Display cabinet plug in Sporlan 0 5 20 Alco Ex7 10 Sporlan 30 Alco Ex8 Danfoss ETS 25 Sporlan 50 250 45 oO Cal NI N N N Display cabinet centralized 10 Sporlan 0 5 20 Alco Ex7 10 Sporlan 30 Alco Ex8 Danfoss ETS 25 Sporlan 50 250 45
7. for code Back HH Yelow H H White H White iat ed iem A Ay A Se eee EVD00004 e Yellow i ite White Red Black for code EVD00014 Spartan USD pos SH ES 2 5 2 4 Relay Plug in terminal line Function COM Common PHOENIX GMSTB 2 5 2 31 NO Normally open contact 5 A 250 Vac resistive load 2 A 250 Vac inductive load PF 0 4 Fig 2 6 2 5 Service serial port ge Allows access to the functions of the EVD4 via PC To access this connector lt gt 1 Remove the cover levering it with a screwdriver the central notch Fig 2 7 NY lt gt 2 Locate the white 4 pin connector and insert the special converter cable Fig 2 8 Connect the USB cable to the PC if the EVD is not powered by the 24 Vac line it will take its power supply from the serial converter Once the supervisor has been connected start an application with the supervisor protocol at 4800 baud on network address 1 for example via EVD4_Ul see APPENDIX I This serial port can be connected and disconnected without needing to remove the USB cable from Fig 2 7 the PC convertitore converter CVSTDUTTLO Fig 2 8 10 EVD 030220227 rel 2 1 12 06 2008 3 EVD APPLICATIONS CONNECTIONS LIST OF PARAMETERS AND OPERATING MODES Below Is a description of the connections configuration paramete
8. 050220227 rel 2 1 12 06 2008 2 INPUTS AND OUTPUTS Below Is a description of the connectors supplied with the EVD00004 0 or purchased in separate packages EVD400CONO for the EVD00004 1 The drawings represent the connectors as seen after having been fitted on the EVD 2 1 Power supply sensors digital 1 0 The main 14 pin MINIFIT connector 15 used to connect the main and auxiliary power supply if the EVBAT00200 300 module is fitted as well as the sensors digital inputs and transistor output This connector accepts wires with cross section up to 1 mm with MOLEX 55567 barrel A kit of pre crimped 14 x 1 mm cables length 5 m is available for purchase EVDCAB0500 line G GO GND Vbat Function 24 Vac power suppl Earth for all signals in electrical contact with GND and the GNX terminal on the main serial connector Emergency power supply generated by the EVBAT00200 module DI2 Digital inputs to be activated by voltage free contact or transistor to GND 5 V no load and 5 mA short circuited Vr1 Vr2 5 V references used as power supply to the ratiometric probes 51 52 55 54 S4V OC Analogue input for ratiometric probe or NTC low temperature probe Analogue input for ratiometric probe NTC high temperature probe or Pt1000 Analogue input for ratiometric probe or NTC low temperature probe Analogue input for 4 to 20 mA signal Analogue input for 0 to 10 Volt signal Open collector transistor outp
9. 1 configure the parameters listed in 3 4 2 using the display that manages the pCO according to the application and or systems used For the unit to be correctly operated the SYSTEM SET and AUTOSETUP levels need to be compiled The SYSTEM SET level must be compiled as this contains the information on what is physically installed in the system Selecting the type of driver and enabling any advanced functions will allow access to specific flelds masks in this or other menus The AUTO SETUP level of parameters must also be compiled and contains fundamental information on the type of unit The ADVANCED SET branch is not required for standard superheat control and is provided for expert users and or to implement non standard functions If some essential fields have not been configured the alarm message DRIVER x AUTOSETUP PROCEDURE NOT COMPLETED will prevent the unit from being started until the autosetup procedure has been completed 16 EVD 030220227 rel 2 1 12 06 2008 3 3 Application as positioner EVD000 40 and EVD000 43 The EVD code EVD000 40 or EVD000 43 can be used as a positioner for electronic expansion valves proportional to a 4 to 20 MA or 0 to 10 Volt signal from a controller 3 3 1 Connections Communication connect 541 and GND to the controller for 4 to 20 mA signals connect S4V and GND to the controller for 0 to 10 Volt signals Fig 3 9 Configuration connect the converter CVSTDUTTLO or CVST
10. 4 3 2 number indicating the type of refrige Type of refrigerant consult the electronic expansion valve technical documentation to check the complete valve driver system compatibility with the chosen refrigerant 1 R22 2 R134a 3 R404a 4 R407C 5 R410a 6 R507a 7 R290 8 R600 9 R600a 10 R717 11 R744 12 R728 15 R1270 READ ONLY received from uC READ ONLY received from uC type of control Type of control if EEV man mode is not enabled 0 standard PID with protectors 1 simple PID without protectors 2 positioner on S4 In positioner mode the activation of any control or alarm is disabled the driver positions the valve between 0 and the Maximum steps proportionally to a signal on input S4 see the instruction sheet either 0 10 Volt or 4 20 mA confirm enable restore default parame Confirms the reset of default parameter values based on the information entered for ter values the System Set group of parameters from the pCO Regulation Re install AUTOSE TUP values Relay stdby Requested steps a Reset to default 51 probe limits Max 51 probe limits Min S2 Pt1000 calib S4 probe type relay status in standby in stand alone Relay status in standby unit powered but capacity demand equal to 0 when the EE in edd driver operates in stand alone mode normally the relay is open if 1 the relay is closed required motor position in manual Required position of the mot
11. 6 SEH Green Green Blue Black Yellow H H White White M Brown fi Red fe Brown White Black pem Black AA n eee eee Fig 3 16 3 4 2 List of parameters Below is the list of parameters the meaning of each is detailed in APPENDIX II while APPENDIX III shows list of the values of the reference parameters in relation to the most common applications In the standard application the EVD4 read and write parameters are organised into three groups accessible from a pCO terminal input output maintenance and manufacturer The SYSTEM SET level must be compiled as this contains the information on what is physically installed in the system Selecting the type of driver and enabling any advanced functions will allow access to specific fields masks in this or other menus The AUTO SETUP level of parameters must also be compiled and contains fundamental information on the type of unit The ADVANCED SET branch 15 not required for standard superheat control and is provided for expert users and or to implement non standard functions MANUFACTURER group SYSTEM SET Key W Main parameters required to start operation O Secondary parameters required for optimum operation Advanced parameters Parameter name Description model of EVD used from pCO number indicating the combination of senso
12. H enable disable manual valve positionine required motor position in manual control Calibr S4 eain mA Calibr S4 offs mA Calibr S4 gain Volt Calibr S4 offs Volt Regulation type EEV mode man Requested steps 4 probe type be of probe on channel S4 Valve type number that defines the type of electronic valve used u KEY 1 KEY 12 En positioner enable positioner function E READ System measurements Fig 9 Parameter name Description EEV opening EEV position S4 signal Reset to default Functional test Digital input 1 Stand alone valve opening as a position of the valve in steps signal on input S4 Digital variables Fig 9 confirm enable default parameters functional test status of digital input 1 select stand alone operation EVD 030220227 rel 2 1 12 06 2008 17 MOLEX Mini Fit 538 39 01 2140 4 20 mA 0 10 Fig 3 9 convertitore converter CVSTDUTTLO Key A Service serial port B serial port Fig 3 10 230 Vac 24 Vac Fig 3 11 3 3 3 EVD4_UI user interface The EVD4_UI user interface is based on the CAREL supervisor protocol and Is designed for the easy and intuitive reading or configuration of the control parameters The program can be started in different configurations so as to display the set of parameters that is suitable for the type of installation the EVD is used in to do this make the connection using the name of the required configuration T
13. Low SH status active when in low superheat control Active when the superheat measured is lower than CH Low Superheat or similar in status HP or DF mode Maximum steps 23 faso 480 faso Position beyond which the valve is considered completely open minimum control steps Position below which the valve is considered closed This parameter is only used during repositioning see CH Circuit EEV Ratio MODE 16 READ ONLY received from pC Received from uC describes the type of cycle that the main controller is managing 0 cooling CH 1 heating HP 2 defrost DF 3 pump down MOP Cool Mode temperature at maximum operating Temperature at the maximum operating pressure allowed at the evaporator outlet in pressure MOP in CH mode CH mode When the temperature is greater than the set threshold the system enters O MOP status activating the MOP status digital variable and MOP control the driver stops SH control and starts controlling the valve position so as to reach the MOP set point considering the MOP integral time parameter The driver resumes SH control when the temperature returns below the set threshold MOP Defr Mode 55 temperature at maximum operating Temperature at the maximum operating pressure allowed at the evaporator outlet in pressure MOP in DF mode DF mode When the temperature is greater than the set threshold the system enters MOP status activating the MOP status digital variab
14. VERS or unit macroblock parameter that defines the Identifies the type of unit compressor that the expansion valve is used on integral time This selection optimises the PID control parameters and the auxiliary Driver protectors considering the control characteristics of the various types of system Reciprocating 2 Screw 5 Scroll 4 Flooded cabinet 5 Cabinet ICond prbepres 12 Jo Jo Jo condensing pressure value measured Condensing pressure value measured from uC or pCO Cond probe sat ETT TT saturated gas a in the Saturated gas temperature value calculated in the condenser from uC or pCO temp condenser um Hm um CH Circuit EEV Ratio oO CH Integral time oO CN N N CH Low Superheat A N N gt N N N UN o CH Proportional B CH Superheat set Closing extra steps 3 N STEPCOUNTH 35 o 8 Step counter in hexadecimal format high part STEPCOUNTL jo o Jo Step counter in hexadecimal format low part Cool parameter that defines the Identifies the type of exchanger used as the evaporator in cooling mode integral time 1 Plates 2 Shell amp tube 3 Fast finned 4 Slow finned This selection optimises the PID control parameters and the auxiliary Driver protectors considering the control characteristics of the various types of system PID derivative time This is the time of the PID derivative action in
15. and or replace the valve The showcase does not reach Check that the strand alone parameter is activated the set temperature and the position of the valve is always The driver digital input is not connected correctly Check the connection of the digital input to 0 for showcases onl EVD 030220227 rel 2 1 12 06 2008 3 APPENDIX I INSTALLING AND USING THE EVD4 UI PROGRAM Below 15 a description of how to install and use the EVD4 UI configuration and monitoring program LI Installation To install the program download the required EVD4_UI zip file from http KSA Carel com copy the contents of the EVD4_Ul zip file to the required path on the PC e g C Program Files the first time that the program Is used edit the Destination item under the Link properties by entering the path used on the PC Proprset EVD4 FULL 52 Preparing the connections Connect the CVSTDUTTLO converter to the EVD controller as explained in 2 5 Preparing the user interface The program does not require installation simply copy the entire contents of the distribution directory to the required location on the hard disk The program cannot run from the CD as it requires write access to the configuration files Open the IN EVD400UI INI file from the path where EVD4_Ul exe is located and make sure that the Paddr parameter is set to 1 Start the EVD4_UI program using the shortcut icon to the application see VI
16. continuously less than the value set for CH Low Superheat or similar for HP or DF to when the user wants the error to be displayed and or managed high evaporation pressure MOP This is the time that passes from when the superheat temperature is continuously alarm delay greater than the value set for MOP cool mode or MOP Defr Mode or MOP Heat Mode to when the user wants the error to be displayed and or managed 10 This is the time that passes from when the Alarm probe error is continuously active to when the user wants the error to be displayed and or managed type of auxiliary PID control 0 auxiliary controll enable high condensing temperature protection see Hi aa E Tcond protection auxiliary probe configuration Configured from pCO this field defines the third probe on the EVD the probe is read only and sent to the pCO The read options and the probes available depend on the control settings NTC NTCht Pt1000 Pressure Value corresponding to 100 of the pressure read by the ratiometric probe connected to channel S2 ratiometric zero pressure S2 Value corresponding to 0 of the pressure read by the ratiometric probe connected used if EVD is installed with a backup battery enables the EEV not closed error see the corresponding description of the parameter from pCO time after which the valve is considered If SH is high and the valve is open or if SH is low and the valve is closed the valve as b
17. excessive disconnect power to the controller and the EVD including any connections via CVSTDUTTLO or CVSTDOTTLO converter and then reconnect the devices including any connection via CVSTDUTTLO or CVSTDOTTLO converter and wait a few minutes for the connection to be restored independently In the event of connection to uC after having reconnected the devices to the power supply connect the EVD to a PC and activate the EVD4_UI using the EVD4_UI MCH2 PHOENIX MC1 5 3 ST 3 81 Fig 3 1 convertitore converter CVSTDUTTLO Key A Service serial port B Main serial port Fig 3 2 CONE prop su va ve oc connection set En reset to default 14797 then Reset to default Yes the box changes 230 24 Vac from green to red Fig 3 3 for code Rendon CADEI A EVD00004 Eod CAREL DANFOSS SEH i ETS EX5 6 L Green p_ Green White ur Brown Red pr White i Black L for code EVD00014 ecce quei E d p D CARE DANFOSS ALCO dee d ES 5 Green pis Green i Green Pt Blue i Black Yellow PH White White Red TM Brown fer mH Brown m White HH White rr Black H Black bie eee a EVD 030220227 rel 2 1 12 06 2008 AAA 3 1 2 List of parameters Below is
18. legislation IMPORTANT WARNINGS CAREL bases the development of its products on several years experience in the HVAC field on continuous investment in technological innovation of the product on rigorous quality procedures and processes with in circuit and function tests on 100 of its production on the most innovative production technologies available on the market CAREL and its branch offices affiliates do not guarantee in any case that all the aspects of the product and the software included in the product will respond to the demands of the final application even if the product is built according to state of the art techniques The client builder developer or installer of the final equipment assumes every responsibility and risk relating to the configuration of the product in order to reach the expected results In relation to the specific final installation and or equipment CAREL in this case through specific agreements can intervene as consultant for the positive result of the final start up machine application but in no case can it be held responsible for the positive working of the final equipment apparatus The CAREL product is a state of the art product whose operation is specified in the technical documentation supplied with the product or can be downloaded even prior to purchase from the website www carel com Each CAREL product in relation to its advanced technological level needs a phase of definition configuration
19. operation or alternatively Calibr 4 gain Volt and Calibr 54 offs Volt for 0 to 10 Volt operation Set S4 probe type 5 configuration of input S4 The parameters can be accessed for read and write even if the EVD is not powered as the converter or the programming key provide the power supply to the driver excluding the valve EVD 030220227 rel 2 1 12 06 2008 3 4 Application with pCO EVD000041 and EVD000044 via pLAN 3 4 1 Connections Communication connect GNX RT and RT to the pCO unit Fig 3 14 Power supply connect G and to the 24 Vac Fig 3 15 Valve with reference to Fig 3 16 connect the valve according to the type set for the Valve type parameter Probes Connect the ratiometric pressure sensors and NTC temperature sensors to 51 and 53 respectively PHOENIX MC1 5 3 ST 3 81 Fig 3 14 GEMME oo su wr x 53 GND GND Vr1 S1 5 S E v 2 NTC WF SPKT R Temp Press For other types of probes or connections change the value of the EVD probes type 230Vac 24 Vac parameter and see chap 4 Fig 3 15 for code LAS EO zFK x3 3 T oo EVD00004 T CAREL DANFOSS mi cry i gt ETS 1 5 6 i Green i e White ONE Red s pr Black i for code EVD00014 e e o polini CARE ETS 5
20. probe evaporation pressure value measured saturated gas temperature value calculated in the evaporator Condensation condensing pressure value measured from pCO probe saturated gas temperature value calculated in the condenser calculated from dry on previous condensing pressure Aux probe value measured by the auxiliary probe set for the AUX PROBE CONFIG parameter current superheat set point driver hardware version software version installed on the driver MAINTENANCE group Parameter name Description Manual mng electronic expansion valve control mode read EEV mode man driver X required motor position in manual control calculated electronic expansion valve opening position Driver X status enable restart following error correction of the lower limit of S1 correction of the lower limit of 52 correction of the lower limit of 53 ADVANCED SETTINGS SPECIAL TOOLS Not available ALARMS for driver X Parameter name Description alarm probe error active following an error on the signal from the probe alarm Eeprom error active following an EEPROM memory error alarm MOP timeout active in conditions with excessive evaporation pressure alarm LOP timeout active in conditions with insufficient evaporation pressure alarm Low Superheat active in low superheat conditions EEV not closed active due to failed valve closing driver X high superheat driver X with high superheat 3 2 3 Start up After having connected the EVD cas described in 3 4
21. programming commissioning so that it can function at its best for the specific application The lack of such phase of study as indicated in the manual can cause the final product to malfunction of which CAREL can not be held responsible Only qualified personnel can install or carry out technical assistance interventions on the product The final client must use the product only in the manner described in the documentation related to the product itself Without excluding proper compliance with further warnings present in the manual it is stressed that in any case It is necessary for each Product of CAREL To avoid getting the electrical circuits wet Rain humidity and all types of liquids or condensation contain corrosive mineral substances that can damage the electrical circuits In any case the product should be used and stored in environments that respect the range of temperature and humidity specified in the manual Do not install the device in a particularly hot environment Temperatures that are too high can shorten the duration of the electronic devices damaging them and distorting or melting the parts in plastic In any case the product should be used and stored in environments that respect the range of temperature and humidity specified in the manual Do not try to open the device in any way different than that indicated in the manual Do not drop hit or shake the device because the internal circuits and mechanisms coul
22. the output that is the total gain is 10 1 6 6 25 V mA In the case of the SH PID valve pos SH set point SH measured t max reg O sa 20 100 valve where step max reg maximum electronic expansion valve control steps Q circuit capacity in kW of the refrigerant circuit in steady operation Q valve capacity in kW of the electronic expansion valve in the same operating conditions as Q circuit step step max e t band prop 100 Fig 4 IV IV Integral action EFFECT OF Ti Increasing the value of the integral time Ti the valve reaches the set point more slowly but avoids excessive swings This depends on the type of evaporator and the inertia of the circuit The integral action is used to guarantee that the error is null in steady state Indeed the integral action is not zero if there Is no error quite the opposite if for example the error remains stable it continues to increase linearly following the principle whereby until the controlled variable decides to move in the direction want will continue to apply an increasingly intense action Consequently the integral action not only considers the current value at the instant of the error but also the past values As a result if steady state is reached that is the error is null the only contribution to control will be the EVD 030220227 rel 2 1 12 06 2008 integral action It is almost always the integral action that d
23. 21 valve opening as a calculated electronic expansion valve opening position current superheat set point superheat value measured evaporation pressure value measured by sensor saturated gas temperature value calculated in the evaporator compressor suction temperature value measured by sensor Digital variables Fig 3 21 active in low superheat conditions active in conditions with excessive evaporation pressure active in conditions with insufficient evaporation pressure active due to failed valve closing active when in low superheat control status active when In maximum evaporation pressure control status active when In minimum evaporation pressure control status active following an EEPROM memory error active following an error on the signal from the probe status of digital input 1 output relay control signal 3 5 3 EVD4_UI user interface The EVD4_UI user interface 15 based on the CAREL supervisor protocol and 15 designed for the easy and intuitive reading or configuration of the control parameters The program can be started in different configurations so as to display the set of parameters that is suitable for the type of installation the EVD4 15 used in to do this make the connection using the name of the required configuration EVD400 USER INTERFACE USER PANEL Ww EVD versior COM SETUP version IEMDA 13 com seme Firmware rev EEV driver 17 Param key rev Hardwar
24. 5 Application with supervisor EVD000 42 and EVD000 45 via RS485 Supervisor 3 5 1 Connections RS485 Communication connect GNX RT and RT to the converter CVSTDUMORO Fig 3 17 Configuration Connect the converter CVSTDUTTLO or CVSTDOTTLO to the service serial port and to a PC with USB or RS232 serial port Fig 3 18 Power supply connect G and GO to the 24 Vac power supply Fig 3 19 Valve conned the valve according to the type set for the Valve type parameter Fig 5 20 Probes Connect the ratiometric pressure sensors and NTC temperature sensors to 51 and 53 respectively For other types of probes or connections change the value of the EVD PHOENIX MC1 5 3 ST 3 81 Fig 3 17 ratiometric NTC 50T105 C E Temperature Digital input Ratiometric NTC WF pressure SPKT R Fig 3 20 probes type parameter and see technical leaflet 3 5 2 List of parameters Below is the list of parameters visible from the EVD4 UI divided into write and read the meaning of each is convertitore converter for code dancan phann open xx E 2E DI CVSTDUTTLO ne MUERE MEN SEH UE Green Green Green Black Yellow White pl White Red H Brown Red L Brown Whit
25. CABO500 digital input BER for utilities up to 230 Vac Faston connector electronic valve 1 d EVD00014 7 i DLL di TT bee mmm 2a ix n QUO EVDCON0001 10 connector kits Important EVD 40 and EVDEEEFASS tLAN version EVD 41 EVD 44 CVSTDUTTLO converter EVDCONOOQ pLAN version L IL IL oa IL and EVD 45 DODODOO RS485 version EVD 1460 Modbus version PLAN 200 EVBAT00300 battery modules 000000000 Modbus PCO programmable controllers 14 pre crimped cables aan precimp Probes NTC low temperature Probe3 MC2 uC controller mis probes 3 gt PlantVisor 3 M E DL 3 SPKT 0 to 5 V ratiometric Probel gt ZE probes PlantVisor for 2 2 99 configuration em PCO programmable controllers Fassi rrrrr Ner 7 programmable controllers Fig 1 0 1 1 Codes and accessories Code Description EVD000040 Controller with tLAN serial already configured for operation with uC and uC SE address 2 universal for EEV1 valves EVD000041 Controller with RS485 serial already configured for operation with pCO in pLAN address 30 universal for EEV1
26. DOTTLO to the service serial port and to a PC with USB or RS232 Fig 3 10 Power supply with reference to Fig 3 11 connect G and GO to the 24 Vac power supply side Valve with reference to Fig 3 12 connect the valve according to the type set for the Valve type parameter for code pO M CARE AES UNE et EVD00004 p CAREL IDANFOSS ALCO E HS P DE SI Green Green H Green Black 7 Yellow White gt A Red m Brown Red White White 1 Black for code EVD00014 ME v a 0 Sporlan i CAREL SEL tt SEH Green Green bu Blue Black Yellow White White Red Brown Red Brown m White H White H Black PH Black TE E EE DANFOSS ETS Be ee ee Fig 3 12 3 3 2 List of parameters Below is the list of parameters visible on the EVD4 UI divided into read and write the meaning of each parameter Is detailed in APPENDIX II Key Main parameters required to start operation O Secondary parameters required for optimum operation Advanced parameters WRITE Parameter name Description Mode dependent parameters Fig 9 current gain on channel S4 current offset on channel S4 voltage gain on channel 54 voltage offset on channel 4 Global parameters Fig 9 of control
27. EVD C A EL Driver for electronic expansion valve T mel n O 2 E EEV driver i LE 7 Ens User manual Technology amp Evolution User manual We wish to save you time and money We can assure you that the thorough reading of this manual will guarantee correct installation and safe use of the product described INFORMATION FOR USERS ON THE CORRECT HANDLING OF WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT WEEE In reference to European Community directive 2002 96 EC Issued on 27 January 2003 and the related national legislation please note that 1 WEEE cannot be disposed of as municipal waste and such waste must be collected and disposed of separately 2 the public or private waste collection systems defined by local legislation must be used In addition the equipment can be returned to the distributor at the end of its working life when buying new equipment 3 the equipment may contain hazardous substances the improper use or incorrect disposal of such may have negative effects on human health and on the environment 4 the symbol crossed out wheeled bin shown on the product or on the packaging and on the instruction sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and that it must be disposed of separately 5 in the event of illegal disposal of electrical and electronic waste the penalties are specified by local waste disposal
28. I Configurations available and not the EVD4_Ul exe file then press and set Port COM address of the serial port used to connect the CVSTD TTLO Baud Rate 4800 e Parity NO PARITY Byte Size 8 Stop Bits 1 Press save Now if the converter is connected to an EVD image of the driver will be displayed in the top left and the EVD version window will show the following data Firmware rev firmware version of the EVD connected Param key rev parameter key version for future use Hardware rev hardware version Network address network address of the main serial port IV Saving the data Pressing SAVE will open a dialogue box to save the entire memory of the EVD choose a path and enter a name with the extension CFG then press EVD 030220227 rel 2 1 12 06 2008 Loading the data Pressing LAD will open a dialogue box to read a file with the extension CFG choose a file and press am all the data will be displayed in the various windows of the EVD400UI program To transfer the data to the EVD press __ WRITE the Pano WRITE function in this case has no action Modifying the parameters To modify a numerical parameter check the box containing the value of the parameter click the right mouse button set the new value e ENTER To reverse the value of a digital parameter red or green rectangle check the box containi
29. LLEGAL DATA ADDRESS The requested address or one of the requested addresses for a read command is invalid This message will be returned as a response whenever attempting to read an unavailable address 03 ILLEGAL DATA VALUE Whenever attempting to write a read only variable or alternatively when attem pting to individually write a coil with values that are not envisaged by the protocol other than FFOO and 0000 NOTE in all other cases the device does not check the values of the variables that can be written but simply whether the message is valid using the CRC the correct ness of the values is checked by the supervisor 06 SLAVE DEVICE BUSY If for example the command involves executing actions that require a certain time to be completed In this case the supervisor must send the command again subse quently 3 6 4 Supervisor variable mapping The supervisor variables have been grouped into two main classes read only which are reserved the lower ModBus addresses and read write according to the following table MODBUS VARIABLES EVD0001460 MODBUS TYPE CAREL TYPE REGISTER ANALOGUE R ONLY REGISTER ANALOGUE R W REGISTER INTEGER R ONLY REGISTER INTEGER R W COIL DIGITAL R ONLY COIL DIGITAL R W The correspondence between the Carel supervisor addresses of the variables and the ModBus device addresses is as follows for a complete description of the parameter corresponding to the variables see APPENDIX II DESCRIPTI
30. ON OF THE PARAMETERS Carel type R W Spv address ModBus type R W ModBus address O R 4 REGISTER R 1 O R REGISTER R 2 REGISTER R 3 _ R 7 REGISTER R 4 _ R 8 REGISTER R 5 _ R 9 REGISTER R 6 _ R REGISTER R 7 _ R B REGISTER R 8 REGISTER R 9 _ R 5 REGISTER R 10 R 1 REGISTER R I REGISTER R 12 REGISTER R 13 REGISTER R 14 O R 38 REGISTER R R 39 REGISTER R 16 50 5 52 53 54 55 56 57 58 59 60 6 62 63 64 65 66 67 68 69 70 7 72 73 74 15 16 26 EVD 030220227 rel 2 1 12 06 2008 gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt 1 gt 1 gt 1 e e 2 REGISTER R AO Ro 15 REGISTER LR REGISTER R OR REGISTER R OR 7 REGISTER R LR 90 REGISTER R p qu p M RE _ R 9 REGISTER R OR 93 REGISTER R R 9 REGISTER R OR os REGISTER R OR 96 REGISTER R R 10 REGISTER R LR 105 REGISTER R OR REGISTER R R J 07 REGISTER R po R 08 REGISTER R _ R 109 REGISTER R _ R mo REGISTER R ke J OR o om REGISTER R _ R Hj
31. Prepating The 22 Preparing the user interface 32 FEIN a O PP oo T 22 UTE GANA abra cria e MR 33 LVI Modifying TER Endet 33 FV PP e Pro II OVI ETOILE 33 APPENDIX II DESCRIPTION OF THE PARAMETERS 34 APPENDIX Ill PARAMETER SETTINGS 40 APPENDIX IV SUMMARY OF PID CONTROL 41 A E O E II ET 41 NA PIO CONTON IW COCO A en o 41 Ml e OC E A 41 o o AE 42 Derivative action 1 INTRODUCTION EVD is an evolved PID controller complete with driver for stepper motors specially designed for the ma nagement of electronic expansion valves in refrigerant circuits It features sophisticated control functions and can be used in many operating configurations in refrigeration and air conditioning systems such as PID control of superheat with protection and safety compensation functions PID control on one measurement pressure or temperature positioner for electronic expansion valves controlled by 4 to 20 mA or 0 to 10 Volt signal The device is configured and the address set via serial interface and the user interface software Is stored in non volatile memory 2 E2V CAREL electronic expansion 2 valve solenoid alarm valve signal NB DANFOSS SPORLAN and ALCO electronic expansion valves can be connected voltage free relay output 10 connector kits External controller EVD
32. Probes offset S2 correction of S2 Fig 3 24 Probes offset 3 correction of the lower limit of S3 probe error alarm dela enable disable relay opening following low superheat enable disable relay opening following enable disable valve alarm O Minimum steps minimum control steps Maximum steps maximum control steps steps completed in total closing System number of valve standby steps LLL Steprate motor speed peak current per phase gt current with the motor off motor duty cycle Global parameters Fig 3 21 number indicating the type of refrigerant used nie number that defines the type of electronic valve used zero scale for pressure sensor on input S1 Fig 3 25 end scale for pressure sensor on input S1 enable StandAlone enable restart following error OE 24 EVD 030220227 rel 2 1 12 06 2008 READ Parameter name EEV opening EEV position Act SH set Superheat Ev probe press Ev probe sat temp Suction temp Alarm Low SH Alarm MOP timeout Alarm LOP timeout EEV not closed Low SH status MOP status LOP status Alarm Eeprom err Alarm probe err Digital input 1 DOUT2 Description System measurements Fig 3 21 valve opening as a calculated electronic expansion valve opening position current superheat set point superheat value measured evaporation pressure value measured by sensor saturated gas temperature value calculated in the evaporator com
33. anual mng electronic expansion valve control mode read EEV mode man driver X required motor position in manual control calculated electronic expansion valve opening position Driver X status enable restart following error correction of the lower limit of S1 correction of the lower limit of 52 correction of the lower limit of 3 ADVANCED SETTINGS SPECIAL TOOLS Not available ALARMS for driver X Parameter name Description alarm probe error active following an error on the signal from the probe alarm Eeprom error active following an EEPROM memory error alarm MOP timeout active in conditions with excessive evaporation pressure alarm LOP timeout active in conditions with insufficient evaporation pressure alarm Low Superheat active in low superheat conditions EEV not closed active due to failed valve closing driver X high superheat driver X with high superheat 3 4 3 Start up After having connected the EVD cas described in 3 4 1 configure the parameters listed in 3 4 2 using the display that manages the pCO according to the application and or systems used For the unit to be correctly operated the SYSTEM SET and AUTOSETUP levels need to be compiled If some essential fields have not been configured the alarm message DRIVER x AUTOSETUP PROCEDURE NOT COMPLETED will prevent the unit from being started until the autosetup procedure has been completed EVD 030220227 rel 2 1 12 06 2008 21 3
34. arameters The program can be started in different configurations so as to display the set of parameters that is suitable for the type of installation the EVD is used in to do this make the connection using the name of the required configuration The interface configuration for uC is shown in Fig 3 5 and is activated by making the EVD4_UI MCH2 connection as described in APPENDIX I INSTALLING AND USING THE EVD4_UI PROGRAM 3 1 4 Start up After having connected the EVD as described in 3 1 1 connect the service serial port to a PC using the special converter and configure the values of the parameters and the address using the software described in 3 1 3 according to the application and or systems used The parameters can be accessed for read and write even if the EVD4 is not powered as the converter or the programming key provide the power supply to the driver excluding the valve EVD400 USER INTERFACE USER PANEL n EVD version EN DA 13 Firmware rev 20 EEY driver Param key rev 0 1 gt Hardware rev 0 1 CONTROLLER MM Network address 6 MODE COOL 1 TYPE SURRISCALDAMENTO COOL 1 2 common _ valvala 41 Auto WRITE rtura valvola O passi Sekpomit attuale a K Sumscaldamernto 00 Es Press Evap 0 0 i emp Evap 0 0 C sat Sala 0 0 C sat LOAD emp Aspirazi
35. ator in CH mode Identifies the type of exchanger used as the evaporator in cooling mode 1 Plates 2 Shell amp tube 3 Fast finned 4 Slow finned This section configures the integral time in the PID control parameters type of evaporator in HP mode Identifies the type of exchanger used as the evaporator in heating mode 1 Plates 2 Shell amp tube 3 Fast finned 4 Slow finned This section configures the integral time in the PID control parameters type of sensors used Number that indicates the combination of sensors used to calculate the superheat value the default value 51 corresponds to a ratiometric probe connected to 51 and a 103 AT NTC sensor temperature to S3 For other connections set the value of the parameter according to the following formula EVD probes type CFGS1 5 CFGS2 25 CFGS3where CFGS1 probe on channel 51 0 1 or 2 CFGS2 probe on channel 52 0 1 3 or 4 CFGS3 probe on channel 53 0 1 or 2 and 0 measurement 1 ratiometric pressure 2 103AT 10000 ohm at 25 C 3 IHS 50000 ohm at 25 C Evaporator type cool Evaporator type heat EVD probes type 4 Pt1000 modeloftVDused El odelofEVDused from pCO o Jo driver hardware version Driver hardware version o o software version installed on the driver Software version installed on the driver o Jo senda FORCE command to the EVD Transmission of all the parame
36. ble disable manual valve positioning required motor position in manual control time after which the valve is considered as being blocked of sensors used calibration index for PT1000 sensor Advanced correction of S1 correction of S2 correction of the lower limit of S3 probe error alarm dela enable disable relay opening following low superheat enable disable relay opening following enable disable valve alarm O 1 OOOO 22 EVD 030220227 rel 2 1 12 06 2008 Minimum steps minimum control steps Maximum steps maximum control steps steps completed in total closing System number of valve standby steps motor speed peak current per phase current with the motor off motor duty cycle Global parameters 3 21 number indicating the type of refrigerant used Valve type number that defines the type of electronic valve used 51 probe limitsMin barg zero scale for pressure sensor on input S1 S1 probe limitsMax barg end scale for pressure sensor on input S1 Stand alone enable StandAlone enable restart following error READ Parameter name EEV opening EEV position Act SH set Superheat Ev probe press Ev probe sat temp Suction temp Alarm Low SH Alarm MOP timeout Alarm LOP timeout EEV not closed Low SH status MOP status LOP status Alarm Eeprom err Alarm probe err Digital input 1 DOUT2 Description System measurements Fig 3
37. counter power supply and reset INUMVALVECLOSE i 95 jo Jo valve closing counter Valve closing counter INUMVALVEOPEN gt jo OVD start counter with valve error EVD start counter with valve error GEGEN ui Superheat offset with modulating temperature in CH mode temperature in CH mode Open relay low SH enable disable relay opening following Enables disables the opening of the relay when the driver is in Low SH status A i TP o mt oi Lud NN IA Enables disables the opening of the relay when the driver is in MOP status MOP Opening extra steps 65 enable extra steps in opening When the valve has reached the 100 of the control steps in opening as set by the parameters for each valve or the Maximum steps parameter and the procedure requires further opening the driver attempts to further open the valve by controlling Maximum steps 128 steps every second if this parameter is enabled In addition allows any steps lost during control when opening to be recovered Used by pCO Phase current 7 450 450 450 peak current per phase Peak current that the driver supplies to each valve control phase EVD 030220227 rel 2 1 12 06 2008 37 Foa Refrigerant EE EA cooling capacity Reading of the cooling capacity from pCO CS 0 correction of 52 Correction of the value measured by sensor 2 op 0 correction of the lower limit of S3 Correction of the value measured by sensor 3
38. creasing the value decreases swings but bring fluctuations vibrations around the SH set point DF Circuit EEV Ratio percentage of the maximum capacity This is the ratio between the maximum cooling capacity delivered by the valve and managed by the valve in DF mode the maximum in the circuit in DF mode Used to pre position the valve when starting from pCO and changing capacity sent by the pCO or uC controller e g if the capacity of the system changes to 50 the pCO or uC tells the driver to preposition the valve at 50 of its total travel minus the Dynamic proportional gain factor then the driver will commence independent SH control from pCO or uC DF Integral time 30 30 integral time for superheat controlin This is the time of the PID integration action in the operation in DF mode increasing DF mode the value the SH reaches the set point more slowly but avoids excessive swings This depends on the type of evaporator and the inertia of the circult DF Low Superheat A 45 4 4 4 low superheat value in DF mode This is the minimum SH value below which the system activates the Alarm Low Superheat after the Alarms delay Low SH in the operation in DF mode This is used to avoid an excessively low pressure difference between the condenser and evaporator circuits which may cause liquid at the compressor intake DF Proportional A 27 4 4 4 PID proportional factor in DF mode This is the PID proportional factor per operation in DF m
39. d and and EVD 43 EVD 44 EVD 45 active when uC 15 not connected to The tLAN communication has been interrupted or has not been restored see the EVD WARNING in par 3 1 1 active when the capacity of the circuit has brought the capacity of the compressor to 100 the information is sent to IS 100 EVD so as to preposition the electronic expansion valve uC has brought the capacity of the compressor to 50 the information is sent to IS 50 EVD so as to preposition the electronic expansion valve This is equal to CH Superheat set or similar for HP or DF corrected if necessary by the safety devices and or the modulation read onl active following an EEPROM memory Fault in the EEPROM memory the system may request a GO AHEAD contact the Carel technical service if the origin of the error is not clear active in conditions with excessive The temperature measured by the EVD probe has exceeded the threshold value set suction temperature for the High superheat alarm threshold for a time greater than the Alarms delay High SH check if the delay configured is suitable for the application active in conditions with insufficient Active in conditions with insufficient evaporation pressure that is when LOP is lower evaporation pressure than the set threshold for LOP Cool Mode or LOP Defr Mode or LOP Heat Mode for a time greater than the Alarms delay LOP check if the delay configured is suitable for the application active in low su
40. d suffer irreparable damage Do not use corrosive chemical products aggressive solvents or detergents to clean the device Do not use the product in application environments different than those specified in the technical manual All the above reported suggestions are valid also for the control serial unit programming key or never theless for any other accessory in the product portfolio of CAREL CAREL adopts a policy of continuous development Therefore CAREL reserves the right to carry out modifications and improvements on any product described in the present document without prior notice The technical data in the manual can undergo modifications without obligation to notice The liability of CAREL in relation to its own product 5 regulated by CAREL s general contract conditions edited on the website www carel com and or by specific agreements with clients in particular within the criteria consented by the applicable norm in no way will CAREL its employees or its branch offices affiliates be responsible for possible lack of earnings or sales loss of data and information cost of substitute goods or services damage to things or persons work interruptions or possible direct indirect incidental patrimonial of coverage punitive special or consequential in any way caused damages be they contractual out of contract or due to negligence or other responsibility originating from the installation use or inability of use of the produc
41. de and 4 pin connector on the valve side improves performance in terms of electromagnetic emissions if used with shielded cable and the shield is connected to the spade EVD 030220227 rel 2 1 12 06 2008 7 1 2 Connecting to the main serial port EVD can operate independently stand alone connected to a supervisor to control the fundamental parameters or connected to the LAN with other CAREL controllers according to the following diagrams 1 2 1 TLAN connection with uC2 or C2 SE or pCO codes EVD000 40 and EVD000 43 ig 1 1 1 2 2 pLAN connection with pCO codes EVD000 41 and EVD000 44 Fig 1 2 in 1 2 3 Stand alone in the RS485 network with CAREL supervisor codes EVD000 42 and a EVD000 45 or with Modbus supervisor code EVD0001460 Hg US 1 3 Operation of the service serial port The service serial port par 2 5 is used to access all the EVD4 parameters even when the instrument is already installed and operating to do this the special converter is required CVSTDUTTLO or CVSTDOTTLO plus a PC with USB RS232 serial port APPENDIX I Installing and using the EVD4 Ul program describes the installation and operation of the EVD4_UI software that is used to configure the controller The converter can power the logical section of the EVD4 but not the expansion valve and therefore this can be configured from the PC without having to connect the instrument t
42. e White fi Black fit Black Key A Service serial port er or code Main serial port EVD00014 gt ____ uL eee Lac Sporlan i CAREL DUI co Fig 3 18 E ee sa Green Green Green Blue Black fe Yellow White H White Red Brown Red Brown m White White Fem Black H Black detailed in APPENDIX II while APPENDIX III shows a list of the values of the reference parameters in relation to certain applications Key W Main parameters required to start operation O Secondary parameters required for optimum operation Advanced parameters WRITE Mode Parameter name Parameter description Mode dependent parameters Fig 3 21 percentage of the maximum capacity managed by the valve Main superheat set point PID proportional factor integral time for superheat control dead zone for PID control PID derivative time CH Low Superheat low superheat value LOP Cool Mode temperature at minimum operating pressure LOP in CH mode 230Vac 24 Vac Advanced MOP Cool Mode temperature at maximum operating pressure MOP in CH mode integral time for low superheat control integral time for low evaporation pressure LOP control Fig 3 19 integral time for high evaporation pressure MOP control low superheat alarm dela low evaporation pressure LOP alarm dela high evaporation pressure MOP alarm dela MOP delay time when starting control ena
43. e rev j CONTROLLER Network address MODE Princip _ Superheatino Princp Adv anced I Advanced 11 System Circuit EEV ratio 0 7 Auto WRITE CH Superheat set 0 0 K Chi Prop gain 0 0 READ CH Integral time Os WRITE 1 probe limitsMin 1 probe limitsMax Alarm Eeprom err Alarm probe err Digital input 1 DOUT2 16 05 2006 09 59 05 Fig 3 21 The interface configuration for the positioner function is shown in Fig 3 21 and Is activated by making the EVD4_UI stand alone connection as described in APPENDIX INSTALLING AND USING THE EVD4_UI PROGRAM 3 5 4 Start up After having connected the EVD4 as described in 3 5 1 connect the service serial port to a PC via the special converter and configure the parameters and the address using according to the application and or systems used The controller is already enabled to switch off the EVD4 disable the Stand alone variable or modify the status of digital input D1 Fig 2 1 and run the supervisor program i e PlantVisor to monitor the system EVD 030220227 rel 2 1 12 06 2008 23 3 6 Application with Modbus protocoll EVD0001460 via RS485 Supervisor RS485 3 6 1 Connections DI Communication connect GNX RT and RT to the corresponding ends of the RS485 serial interface connected to the pCO controller see the pCO sistema manual Fig 3 22 Configuration Connect the converter CVSTDUTTLO or CVSTDOTTLO to the service seria
44. eing blocked may be considered blocked This parameter defines the delay before performing respectively a forced dosing or a forced opening pus 111 This is the correction to the end scale in the calibration of channel SA used to receive a 4 20 mA signal when the driver is operating as a positioner A A a ee This is the correction to the end scale in the calibration of channel S4 used to receive a 0 10 Volt signal when the driver is operating as a positioner Calibr 54 offs mA 112 current offset on channel 54 This is the correction to the deviation from zero in the calibration of channel S4 used SA ee iii Calibr 4 offs Volt 114 voltage offset on channel 54 This is the correction to the deviation from zero in the calibration of channel S4 used to receive a 0 10 Volt signal when the driver is operating as a positioner ees Alarm HiT asp Alarm LOP timeout 26 25 Alarm MOP timeout 4 Alarm probe error 3 Alarms delay High SH Alarms delay LOP 120 2 Alarms delay gt aD gt gt gt gt gt gt gt gt gt N CN UN a UN Cc N C gt 5 EN Alarms delay probe error Aux probe config Max Aux probe limits Min Battery presence Blocked valve check 9 5 l 1 o 34 EVD 030220227 rel 2 1 12 06 2008 Capacity control EVD macroblock parameter that def
45. elation to the meaning of the reference parameter Note SH superheat CH chiller mode HP heat pump mode DF defrost MOP Maximum Operating Pressure LOP Lowest Operating Pressure High Temperature EEV Electronic Expansion Valve GREEN or FALSE or OFF or 0 or DISABLED have the same meaning in relation to the meaning of the reference parameter RED or TRUE or ON or 1 or ENABLED have the same meaning in relation to the meaning of the reference parameter WARNING All the parameters corresponding to integral and derivative times if set to 0 disable the corresponding function Raziom NTC 103AT NTC IHS Pt1000 4 20 mA 0 10 V limits 0 V WV limits if applied to inputs other thanthose 2047 C 699 C 42220 recommended see Chapter 4 MAX dC 5927 650 C EVD 030220227 rel 2 1 12 06 2008 39 APPENDIX PARAMETER SETTINGS The following values are recommended as a reference and starting point for the configuration of the EVD400 and the PID control The users can then check whether or not these values are correct based on their own acceptability criteria and then change them if necessary N B the pressure probe 15 connected to 1 Primary Application Refrigerant Valve type S1 probe limits 51 probe limits CH Circuit CH Superheat CH Proportional gain CH Integral Derivative Min bar Max bar EEV ratio set C time sec time sec Chiller CAREL E2V 4
46. ent 2 current with the motor off Current running through the motor when stationary m mm SEES EMEN Value measured by the suction temperature sensor rature sensor Ss Value of the superheat calculated on the Mollier chart using the suction temperature and evaporation pressure values Differential temperature with modulating thermostat in CH equal to the proportional thermostat in CH mod band pu B a oP er Set to 0 limits transmission on the main serial port only to the variables required for the operation with the microchiller alternating current power supply status if 0 the power supply is present if 1 it is not present VAC D p o enable disable valve alarm Enables disables the valve alarm valve not closed at shutdown alarm see EEV not closed 2 5 50 200 17 58 1 42 4 56 Regulation type 38 EVD 030220227 rel 2 1 12 06 2008 Valve type 30 number that defines the type of electro Number that defines the type of electronic valve used and selects the motor opera nic valve used ting parameters from a table The following valves are supported 0 CAREL E2V 1 Sporlan SEI 0 5 20 2 Sporlan SEI 30 3 Sporlan SEH 50 250 m 4 Alco EX5 EX6 5 EX7 6 EX8 330 step s 7 EX8 500 step s 8 Danfoss ETS 25 50 9 Danfoss ETS 100 10 CAREL E2V P 11 Danfoss ETS 250 400 gt 12 a
47. ers to control in CH mode low superheat value This is the minimum SH value below which the system activates the Alarm Low Supe rheat after the Alarms delay Low SH This is used to avoid an excessively low pressure difference between the condenser and evaporator circuits which may cause liquid at the compressor intake If HP and DF modes are also available this refers to control in CH mode PID proportional factor This is the PID proportional factor increasing the value increases the reactivity of the valve and therefore of SH control however for high values control may become unstable This depends on the ratio between circuit capacity and valve capacity and on the maximum number of valve control steps If HP and DF modes are also available this refers to control in CH mode superheat set point Superheat set point If HP and DF modes are also available this refers to control in CH mode Do not set excessively low values less than 5 C or too near the low superheat limit at least 3 C difference enable extra steps in dosing Enables the extra steps function when dosing when the driver doses the valve but the SH value measured is not coherent too low the driver realises that the valve is not completely dosed and forces some extra closing steps at preset intervals until the SH reaches coherent values Maximum steps 128 are completed every second Used by pCO Number of steps that the driver uses to totally dose the valve not during control
48. et mode adjust DF Proportional gain F Integral time DF Low Superheat SHeat dead zone common list adjust Low SHeat int time integral time for low superheat control LOP integral time integral time for low evaporation pressure LOP control erivative time PID derivative time e integral time for high evaporation pressure MOP control Hi TCond protection maximum condensing temperature HiTCond proteion time after which in certain conditions the valve is considered as being blocked INPUT OUTPUT group Parameter name Descriprion operating mode of the X th driver from pCO enable disable manual valve positionine calculated electronic expansion valve opening position Power reguest cooling capacity from pCO refrigerant configured for the REFRIGERANT parameter superheat value measured see Ev probe sat temp compressor suction temperature value measured Evaporation probe evaporation pressure value measured saturated gas temperature value calculated in the evaporator Condensation condensing pressure value measured from pCO probe saturated gas temperature value calculated in the condenser calculated from dry on previous condensing pressure Aux probe value measured by the auxiliary probe set for the AUX PROBE CONFIG parameter current superheat set point driver hardware version software version installed on the driver 20 EVD 030220227 rel 2 1 12 06 2008 MAINTENANCE group Parameter name Description M
49. eter default values percentage of the maximum capacity managed by the valve in the circuit where it is installed Mode temperature at maximum operating pressure MOP in DF mode maximum superheat temperature ADVANCED SETTINGS FINE TUNING cool mode adjust heat mode adjust defr mode adjust common list adjust Parameter name Description percentage of the maximum capacity managed by the valve in the circuit where it is installed in CH mode percentage of the maximum capacity managed by the valve in the circuit where it is installed in HP mode percentage of the maximum capacity managed by the valve in the circuit where it Is installed in DF mode integral time for low evaporation pressure LOP control integral time for high evaporation pressure MOP control integral time for high condensing pressure control HiTcond Blocked valve check time after which in certain conditions the valve is considered as being EVD 030220227 rel 2 1 12 06 2008 15 8 Em INPUT OUTPUT group Parameter name Descriprion operating mode of the X th driver from pCO enable disable manual valve positioning EEV position calculated electronic expansion valve opening position Power reguest Icooling capacity from pCO RXXX refrigerant configured for the REFRIGERANT parameter superheat value measured Saturated temp see Ev probe sat temp compressor suction temperature value measured Evaporation
50. he initial and the final position is multiplied by value of this parameter between 0 and 1 and the effect of the change in capacity on the SH is attenuated AE NN enable disable manual valve positioning Enables disables manual valve positioning eliminating the activation of any control or alarm active due to failed valve dosing If the EVD400 is installed with a backup battery in the event of mains power failures or no communication with the controller for more than 30 sec the valve is closed If during this procedure EVD400 cannot control all the steps to close the valve due to lack of backup power flat battery when restarting the EEV not closed error is displayed with the consequent Go ahead request EEV mode man EEV not closed NI EEV opening o Jo valveopeningasa Controlled opening of the valve as a o 0 calculated valve opening position Calculated opening of the valve in steps Enable reset to default Ev probe press Ev probe sat temp A NENNEN Mais Enables disables the manual positioner function from pCO function If set to 14797 allows the user to reset all the parameters to the default values by enabling the Reset to default variable lO evaporation pressure value measured Value measured by the evaporation pressure probe Saturated gas temperature value calculated in the evaporator taken from the evapora ted in the evaporator tion pressure on the Mollier chart type of evapor
51. he interface configuration for the positioner function is shown in Fig 3 13 and is activated by making the EVD4_UI positioner connection EWD4AGO USER INTERFACE USER PANEL iin nm EVD version Firmware rev EEN gt Param key rev uf Hardware rev PMI Hotwork address MODE TYPE Positioner CONTROLLER Em em 4 gain mA Calor Sd offs m Calbr 4 qain volt 54 offs Volt Fasz manuale Fasz manuale Fig 3 13 3 3 4 Start up After having connected the EVD as described in 3 3 1 connect the service serial port to a PC using the converter and configure the values of the parameters listed in 3 3 2 using the software described in 3 3 3 as follows Power up the EVD from the mains or via converter Connect EVD4 to the PC via the converter Set S4 probe type 5 configuration of input 54 as 4 to 20 mA or 6 0 to 10 V Close input DII Set posit with S4 2 Activate stand alone To calibrate the analogue inputs proceed as follows Reset the EVD4 by activating the digital variable Reset to default Within 30 seconds write 19157 to KEY1 functional test mode Write 1223 to KEY12 disable exit the functional test by timeout within 250 seconds Activate the Functional test digital variable the calibration parameters are now accessible in write mode Set the Calibr 54 gain mA and Calibr 54 offs mA parameters to zero for 4 to 20 mA
52. ines According to the type of compressor control selected the macroblock calculates the the type of compressor control proportional factor which will be entered indiscriminately for the parameters CH Proportional gain HP Proportional gain and DF Proportional gain Multiple choice none or stages if the compressor is without capacity control or with step control continuous slow for screw compressors with slider control continuous fast for compressors with inverter control percentage of the maximum capacity This is the ratio between the maximum cooling capacity delivered by the valve and managed by the valve the maximum in the circuit in cooling or CH mode if managed Used to pre position the valve when starting and or changing capacity if possible sent by the pCO or uC controller e g if the ratio is 40 and if the capacity of the system changes to 1 2 of the current level the pCO or uC tells the driver to preposition the valve at half of 40 that is equal to 20 of the total capacity of the valve minus the Dynamic proportional gain factor once the driver has completed pre positioning independent SH control will commence integral time for superheat control This is the time of the PID integration action increasing the value the SH reaches the set point more slowly but avoids excessive swings This depends on the type of evaporator and the inertia of the circuit If HP and DF modes are also available this ref
53. is depends on the ratio between circuit capacity and valve capacity and on the maximum number of valve control steps HP Superheat set superheat set point in HP mode Superheat set point in HP mode KEY 1 special functions If set to 14797 allows the user to reset all the parameters to the default values by enabling the Reset to default variable If set to 19157 allows the user to remain in functional test mode enabling the Functional test variable within 30 s from when the driver is switched on see the paragraph Application as positioner in the EVD400 Manual enable write advanced valve parameters Enable write advanced valve parameters if set to 24717 Service only if set to 24717 Service onl KEY12 14 special functions If set to 12233 within 250 s from when the driver is switched on disables the termina tion of the functional test by timeout see paragraph Application as positioner in the EVD400 Manual LOP Cool Mode temperature at minimum operating Temperature at the minimum operating pressure allowed at the evaporator outlet in pressure MOP in CH mode CH mode When the temperature is less than the set threshold the system goes into O LOP status activating the LOP status digital variable and LOP control the driver stops SH control and starts controlling the valve position so as to reach the LOP set point considering the LOP integral time parameter The driver resumes SH control when the temperature return
54. ition the valve when starting from pCO and changing capacity sent by the pCO or uC controller e g if the capacity of the system changes to 50 the pCO or uC tells the driver to preposition the valve at 50 of its total travel minus the Dynamic proportional gain factor then the driver will commence independent SH control from pCO or uC integral time for superheat controlin This is the time of the PID integration action for operation in HP mode increasing HP mode the value the SH reaches the set point more slowly but avoids excessive swings This depends on the type of evaporator and the inertia of the circuit il low superheat value in HP mode This is the minimum SH value below which the system activates the Alarm Low Hi TCond int time A UN gt High superheat alarm threshold High Tc status HP Circuit EEV Ratio HP Integral time gt HP Low Superheat 4 Superheat after the Alarms delay Low SH in the operation in HP mode This is used to avoid an excessively low pressure difference between the condenser and evaporator circuits which may cause liquid at the compressor intake 36 EVD 030220227 rel 2 1 12 06 2008 HP Proportional 26 5 3 3 PID proportional factor in HP mode This is the PID proportional factor for operation in HP mode increasing the value in gain creases the reactivity of the valve and therefore of SH control however for high values control may become unstable Th
55. l port and to a PC with USB or RS232 serial port Fig 3 18 Power supply connect G and GO to the 24 Vac power supply Fig 3 19 Valve connect the valve according to the type set for the Valve type parameter Fig 3 20 Probes Connect the ratiometric pressure sensors and NTC temperature sensors to 51 and 55 PHOENIX MC1 5 3 ST 3 81 respectively for code EVD00004 e CAREL DANFOSS ALCO ES Sh Green Blue DS AS Black Yellow White H White Sa E Red Brown Red H Brown White White Black u Black Fig 3 22 for code EVD00014 S groom NE Ur ED esee u ae i po 1 CAREL 1 ALCO i 1 ES SEH _Green A Green Green Blue Black H H Yellow H White HH White Red mm Brown Red Brown White White fr Black HH lac i E Fig 3 26 Z Temperature Digital input Ratiometric 3 5 2 List of NTCAWE ni pressure SPKT R Below is the list of parameters visible from the EVD4 UI divided into write and read the meaning of each 5 detailed in APPENDIX II while APPENDIX III shows a list of the values of the reference parameters in relation to For other t
56. lation in force Motor control The controller works with two pole stepper motors Fig 1 It works with a theoretical sinusoidal wave form In micro steps and with speeds from 5 to 1000 steps the current and the control speed effectively achievable depend on the resistance and the inductance of the motor windings used If the driver is connected to a pCO it receives all the individual operating parameters for the motor from the pCO controller if on the other hand it is used in stand alone mode or with the microchiller controller only one parameter needs to be set taken from Table 5 according to the model of motor used see Table 5 The controller can manage motors with maximum positions of up to 32000 steps For connection use 4 wire shielded cables AWG18 22 max length 9 5 m The shield should be connected to the closest possible earth point in the panel Power supply Power supply 20 to 28 Vac or 20 to 30 Vdc 50 60 Hz to be protected by external 0 8 A fuse type T Use a class Il safety transformer rated to at least 20 VA Average current input at 24 Vac 60 mA with the motor not operating control logic only 240 mA with CAREL motor operating 240 mA peak at 18 Q Emergency power supply if the optional EVBAT00200 300 module is installed power supply is guaranteed to the controller for the time required to close the valve Inputs and outputs Analogue inputs input type CAREL code 51 53 NTC WF SPKT R 2 NTC HT SPKT R
57. le and MOP control the driver stops SH control and starts controlling the valve position so as to reach the MOP set point considering the MOP integral time parameter The driver resumes SH control when the temperature returns below the set threshold Heat Mode A 54 temperature at maximum operating Temperature at the maximum operating pressure allowed at the evaporator outlet in pressure MOP in HP mode HP mode When the temperature is greater than the set threshold the system enters MOP status activating the MOP status digital variable and MOP control the driver stops SH control and starts controlling the valve position so as to reach the MOP set point considering the MOP integral time parameter The driver resumes SH control when the temperature returns below the set threshold See EN Integral time for high evaporation pressure MOP control see MOP cool mode pressure control MOP MOP startup delay 49 MOP delay time when starting control When the system is started the evaporation pressure is high and may exceed the set MOP threshold The duration of the MOP delay time can be set when starting the controller MOP status eepo p poo active when in maximum evaporation when in MOP control status see MOP cool mode pressure control status Net address 4 2l 2 1 0 250 network address __________ Network address INUMRESTART or fo Jo 0 EVD start counter power supply EVD start
58. m is defined by the following law u t Kye t e Ke t dt Kj cel oppure u t K 1004 de This means that the control is calculated as the sum of three contributions P or proportional action Ke t k proportional gain or integral action let t dt Ti integral time 1 or derivative action e t dt Td derivative time 1 hence the definition PID control IV III Proportional action EFFECT OF K Increasing the value of the proportional gain increases the reactivity of the valve to the limit where this may cause instability and not reach the set point with precision This depends on the ratio between the circuit capacity and the valve capacity and on the maximum number of valve control steps The proportional action guarantees control over the process variable that is proportional to the system error at the instant t The controller performs a corrective action on the control variable at the Instant t that is equal to u t K e t K y t yO t The proportional action follows the logic whereby the greater the error instant by instant the more EVD 030220227 rel 2 1 12 06 2008 4 t measured SH 42 intense the action on the process so as to bring the controlled variable to the desired value It is important to note that this has a value other than zero only if the error is not zero therefore in steady operation this is ideally zero In reality in steady operation stable at the se
59. n position of the valve in steps Act SH set current superheat set point Superheat superheat value measured Ev probe press evaporation pressure value measured Ev probe sat temp saturated gas temperature value calculated in the evaporator Suction temp compressor suction temperature value measured Cond probe press condensing pressure value measured from uC Cond probe sat temp saturated gas temperature in the condenser Digital variables Fig 9 C off line active when uC is not connected to EVD 50 capaci active when the capacity of the circuit is 50 100 capaci active when the capacity of the circuit IS 100 alarm Low Superheat active In low superheat conditions alarm MOP timeout active In conditions with excessive evaporation pressure alarm LOP timeout active In conditions with excessive evaporation pressure EEV not closed active due to failed valve closing Low SH status active when in low superheat control status MOP status active when maximum evaporation pressure control status LOP status active when In minimum evaporation pressure control status High Tc status active when in high condensing temperature control status alarm Eeprom error active following an EEPROM memory error alarm probe error active following an error on the signal from the probe 3 1 3 EVD4_UI user interface The EVD4_UI user interface is based on the CAREL supervisor protocol and Is designed for the easy and intuitive reading or configuration of the control p
60. nd lt 99 direct setting of the parameters custom valve XPA 65 1 enable extra steps in opening When the valve has reached the 100 of the control steps in opening as set by the parameters for each valve or the Maximum steps parameter and the procedure requires further opening the driver attempts to further open the valve by controlling Maximum steps 128 steps every second if this parameter is enabled The procedure is stopped if the condition persists for Maximum steps 3 steps In addition allows any steps lost during control when opening to be recovered XPC enable extra steps in closing Enable the extra steps function when closing when the driver closes the valve but the SH value measured is not coherent too low the driver realises that the valve is not completely closed and attempts to close it by performing Maximum steps 128 steps every second until the SH reaches coherent values The procedure is stopped if the condition persists for Maximum steps 3 steps In addition allows any steps lost during control when closing to be recovered SH superheat CH chiller mode HP heat pump mode DF defrost mode MOP maximum operating pressure LOP lowest operating pressure HiT high temperature EEV electronic expansion valve GREEN or FALSE or OFF or 0 or DISABLED have the same meaning in relation to the meaning of the reference parameter RED or TRUE or ON or 1 or ENABLED have the same meaning in r
61. ng persists re enable automatic operation and set more reactive parameters increase the proportional factor increase the integral time increase the differential time The superheat only swings with the driver in Observe the average operating position of the valve enable manual positioning and set the opening of the valve automatic control to the average value observed if the swing stops re enable automatic operation and set less reactive parameters decrease the proportional factor increase the integral time Bubbles of air can be seen in the liquid indicator Charge the circuit with refrigerant upstream of the expansion valve or adequate subcooling is not guaranteed MOP protection disabled Activate the MOP protection setting the threshold to the required saturated evaporation temperature high evapo ration temperature limit for the compressors and the MOP integral time to a value greater than 0 recommended Asec During start up with high evaporator temperature the Make sure that the MOP threshold is at the required saturated evaporation temperature high evaporation tempera evaporation pressure Is high ture limit for the compressors and decrease the value of the MOP integral time Excessive refrigerant charge for the system for Apply a soft start technique by activating the utilities one at a time or in small groups If this is not possible showcases onl decrease the values of the MOP thresholds The Circuit EEV rati
62. ng the value of the parameter click the right mouse button Meaning of the red or green rectangle GREEN FALSE or OFF or 0 or DISABLED in relation to the meaning of the reference parameter RED TRUE or ON or 1 or ENABLED in relation to the meaning of the reference parameter if the v Auto WRITE checkbox is selected the data is sent to EVD immediately after having been modified otherwise after having modified all the required data press __ WRITE Configurations available The software used to install EVD4_UI is available in the following configurations EVD4_UI Address to set the address of the EVD EVD4_UI Key to program the key EVDA UI Stand Alone to program the stand alone EVD EVD4_UI MCH2 to program the EVD with uC EVD4_U positioner to use the EVD as a positioner with 4 to 20 mA or 0 to 10 Volt This box is used to set the Driver Valve system configuration values These parameters should be set and checked before activating the unit EVD 030220227 rel 2 1 12 06 2008 55 APPENDIX II DESCRIPTION OF THE PARAMETERS In this square the Driver Valve system configuration values are set These parameters have to be set and checked before starting up the unit Key W Main parameters required to start operation O Secondary parameters required for optimum operation Parameter PV address Default Default Default Description Ul Meaning EVD 40 EVD 41 EVD 42 an
63. o parameter is too low Increase the value of the Circuit EEV ratio parameter The driver is not set correctly in STAND ALONE Check that the strand alone parameter is activated The driver digital input is not connected correctly Check the connection of the digital input LOP protection disabled Activate the LOP protection by setting the threshold to the required saturated evaporation temperature between the operating temperature and the calibration of the low pressure switch and the LOP integral time to a value During start up the unit greater than 0 recommended 4sec switches off due to low LOP protection ineffective Make sure that the LOP threshold is at the required saturated evaporation temperature between the operating pressure units with on board temperature and the calibration of the low pressure switch and decrease the value of the LOP integral time compressor only Check that the solenoid opens correctly check the electrical connections and the operation of the relay Check that there are no bubbles of air in the liquid indicator upstream of the expansion valve Check that the subcooling is suitable greater than 5 C Charge the circuit Use manual control to close and open the valve completely If the superheat remains high check the electrical connections and or replace the valve LOP protection disabled Activate the LOP protection by setting the threshold to the required saturated evaporation temperature between the ope
64. o the 24 Vac power supply 1 4 Setting the network address The operating parameters including the network address reside on the EEPROM to modify the va lues access the service serial port using the EVD4 UI software connect the special converter CVSTDUTTLO or CVSTDOTTLO to the service serial port Fig 2 8 and a PC with USB or RS232 serial port then start the EVD4_U Key connection as described in APPENDIX I Installing and using the EVD4 Ul Address and set the Net address parameter in the box at the top right of the interface the Network address item will show the new value of the address after having pressed the READ button If not changed by the user the Net address parameter will have the following default values Net address EVD000 40 and EVD000 43 2 EVD000 41 and EVD000 44 30 EVD000 42 and EVD000 45 52 EVD0001460 Below 15 a description of the connectors supplied with the EVD000 4 0 or purchased in separately in the EVDCONOOO kit for EVD000 4 1 The drawings represent the connectors as seen after having been fitted on the EVD Note if the address is changed using the pLAN or Modbus protocol the Network address item is updated after switching the device off and on again Supervisor CAREL o Modbus Master control Fig 1 3 EVD
65. ode increasing the value in gain creases the reactivity of the valve and therefore of SH control however for high values control may become unstable This depends on the ratio between circuit capacity and valve capacity and on the maximum number of valve control steps DF Superheat set_ A__ 24 0 wo 0 jsuperheatsetpointin DF mode Superheatsetpointin operation DF Digital input 1 D Jo fo o statusofdigitalimput1 Checksthestatusofdigitalinput1 enabled or disabled Digital input2 D e jo fo o istatusofdigtalinput2 Checks the status of digital input 2 enabled or disabled Tan Pie fF relay i control Variable that checks and or signals the opening or closing of the relay 0 open 1 closed Driver X high o po driver X with high superheat EVD200 alarm driver X with high superheat checks the sensors on driver X superheat pee I operating mode of the X th driver Operating mode of the X th driver CH HP DF from pCO Duty cycle ee E motor duty cycle Duration of the control signal sent by the driver to the valve in one second as a percentage 100 continuous signal EVD 030220227 rel 2 1 12 06 2008 35 7 Dynamic proportio nal gain attenuation coefficient with change Parameter active for each change in capacity of the circuit when the driver pre posi capacity tions the valve see CH Circuit EEV Ratio HP Circuit EEV Ratio and DF Circuit EEV Ratio the difference between t
66. ominates the way in which the system reaches steady operation The integral action by definition does not make Jumps and therefore is the slowest to react Indeed it has almost no effect during the initial transient periods these periods are dominated by the other two actions To define the integral time the PI action is considered u t K e t KJe t dt and the response of the two terms to the step change i e 10 as shown in the figure Key 10 0 m t integral action d B proportional action C Ti integral action time 96 10 Error O hM gt posea lt gt Time O Fig 5 Integral time reset time integral constant or doubling time Is defined as the time required for the response of the part to be equal to that of the P part That is the total response to the step change is double the value of the proportional part alone In the case of the SH PID the integral time depends on the type of evaporator plate tube bundle and the thermal inertia of the circuit the more reactive the system the lower the contribution of the integral action must be IV V Derivative action EFFECT OF Td Increasing the value of the derivative time Tp decreases swings however there may be fluctuations around the set point The derivative action makes the control depend on the future of the error that is on the direction it is moving in and the speed it varies In fact the derivative action calcula
67. one 0 0 9c Press Cond 0 0 save Temp Cond 0 0 sat F10 LEH non in lines Potenzialit 50 EVD 030220227 rel 2 1 12 06 2008 13 PHOENIX MC1 5 3 ST 3 81 Fig 3 6 CONE su v veoc 250 Vac 24 Vac Fig 5 7 for code EVD00004 for code EVD00014 3 2 Application with pCO EVD000 40 and EVD000 43 via tLAN 3 2 1 Connections Communication with reference to Fig 3 6 connect GNX and RT to the pCO unit Power supply with reference to Fig 3 7 connect G and GO to the 24 Vac power supply side Valve with reference to Fig 3 8 connect the valve according to the type set for the Valve type parameter Probes Connect the ratiometric pressure sensors and NTC temperature sensors to S1 and S3 respectively GEMME ofa DE un 53 GND GND a 5 NTC WF SPKT R Temp Press For other types of probes or connections change the value of the EVD probes type parameter and see chap 4 Green Brown White Pi llc ore Fig 3 8 3 2 2 List of parameters Below is the list of parameters the meaning of each is detailed in APPENDIX II while APPENDIX III shows a list of the values of the reference parameters in relation to the most common applications In the standard application the EVDA read and write pa
68. or in manual control EN EN restore the values of the parameters to Restores the parameters to the internal default values if Enable reset to default or KEY1 are equal to 14797 tLAN version end scale for pressure sensor on Pressure value corresponding to the maximum of ratiometric output S1 4 5 V 62 input 51 Pressure value corresponding to the minimum of ratiometric output S1 0 5 V input 51 0 0 0 calibration index for PT1000 sensor Calibration value engraved on the metallic body of the probe minus 1000 0 type of probe on channel S4 Number that indicates the type of sensor connected to input S4 0 no measurement 5 4 20 mA 6 0 10 V Sum Ji ro Je Feat of be pa SHeat dead zone 32 dead zone for PID control Value that defines an interval around the SH set point if the SH measured is within this interval the driver stops control and the valve will not perform any movements control resumes when the superheat value is outside of the dead zone Stand alone 67 1 enable StandAlone Enables the StandAlone function from uC or supervisor the driver will operate in this Stand alone 63 enable StandAlone Enables StandAlone from pCO the driver will operate in this mode if digital input 101 fase A RE A O Number of the steps for reopening the valve after complete closing to release the end spring ewe mm po Speed of te stepper motor insta Still curr
69. perheat conditions Active when the SH measured is lower than the set threshold for CH Low Superheat or similar for HP or DF for a time greater than the Alarms delay Low SH check if the timeout is suitable for the application active in conditions with excessive Active in conditions with excessive evaporation pressure that is when MOP is greater evaporation pressure than the set threshold for MOP Cool Mode or MOP Defr Mode or MOP Heat Mode for a time greater than the MOP delay check if the timeout is suitable for the application active following an error on the signal The driver interprets a signal from the sensor that is outside of a determined range of from the probe operation as being a probe error the interval depends on the type of probe and the input used as described in table A The system may request a GO AHEAD contact the Carel technical service if the origin of the error is not clear high superheat temperature alarm delay This is the time that passes from when High superheat alarm threshold is continuously exceeded to when the user wants the error to be displayed and or managed low evaporation pressure alarm This is the time that passes from when the superheat temperature is continuously less than the value set for LOP cool mode or LOP Defr Mode or LOP Heat Mode to when the user wants the error to be displayed and or managed 120 low superheat alarm delay This is the time that passes from when the value of superheat is
70. pressor suction temperature value measured by sensor Digital variables Fig 3 21 active in low superheat conditions active in conditions with excessive evaporation pressure active In conditions with insufficient evaporation pressure active due to failed valve closing active when in low superheat control status active when maximum evaporation pressure control status active when minimum evaporation pressure control status active following an EEPROM memory error active following an error on the signal from the probe status of digital input 1 output relay control signal 3 6 3 Communication protocole The protocol is implemented according to the envisaged specifications so that the device belongs to the BASIC class with the possibility of setting some parameters REGULAR class Value Default Address 1 Broadcast Baudrate 19200 Parit None even odd none Mode Interface Setting the UNICAST address The Modbus address can be selected using the EVD4_UI Address connection as described in Ap pendix Installing and using the EVD4 Ul program within the envisaged range Values from 248 to 255 are reserved If set to one of these values or 0 the FW sets the default value without modifying the parameter in the E2prom After setting the new value the device needs to be switched off and on again to make it effective Setting the BROADCAST address Broadcast messages with address 0 can be sent and will be write onl
71. rameters are organised into three groups accessible from a pCO terminal input output maintenance and manufacturer The SYSTEM SET level must be compiled as this contains the information on what is physically installed in the system Selecting the type of driver and enabling any advanced functions will allow access to specific fields masks in this or other menus The AUTO SETUP level of parameters must also be compiled and contains fundamental information on the type of unit The ADVANCED SET branch is not required for standard superheat control and is provided for expert users and or to implement non standard functions EVD 030220227 rel 2 1 12 06 2008 Key W Main parameters required to start operation O Secondary parameters required for optimum operation Advanced parameters MANUFACTURER group SYSTEM SET Parameter name Description number that defines the type of electronic valve used number indicating the type of refrigerant used minimum control steps enable extra steps in opening Custom valve configuration Closing extra steps enable extra steps in closing Alarms delay AUTOSETUP Evaporator MOP peak current per phase zero scale for pressure sensor on input 51 Closi Opening extra steps enable extra steps in opening Closi Alarms delay Low SH Alarms delay probe error probe error alarm dela enable StandAlone Parameter name Description confirm enable restore param
72. rating temperature and the calibration of the low pressure switch and the LOP integral time to a value oreater than 0 recommended 4sec The unit switches off due to low Make sure that the LOP threshold is at the required saturated evaporation temperature between the operating pressure during control units temperature and the calibration of the low pressure switch and decrease the value of the LOP integral time with on board compressor Check that the solenoid opens correctly check the electrical connections and the operation of the relay only Insufficient refrigerant Check that there are no bubbles of air in the liquid indicator upstream of the expansion valve Check that the subcooling is suitable greater than 5 C Charge the circuit Valve blocked closed Use manual control to close and open the valve completely If the superheat remains high check the electrical connections and or replace the valve The showcase does not reach Check that the solenoid opens correctly check the electrical connections and the operation of the relay the set temperature despite the Insufficient refrigerant Check that there are no bubbles of air in the liquid indicator upstream of the expansion valve Check that the value opening to the maximum subcooling is suitable greater than 5 C Charge the circuit for showcases only Use manual control to close and open the valve completely If the superheat remains high check the electrical connections
73. rs UI graphics and operating modes of the six codes available for the EVD4 in the different applications 3 1 Application with uC and uC SE EVD000 40 and EVD000 43 via tLAN 3 1 1 Connections Communication with reference to Fig 3 1 connect GNX and RT to the uC unit Configuration EVD4 UI software is used to access the parameters connect the converter CVSTDUTTLO or CVSTDOTTLO to the service serial port Fig 3 2 with reference to Fig 3 3 connect G and GO to the 24 Vac power supply side to connect an auxiliary battery see the Instruction Sheet with reference to Fig 3 4 connect the valve according to the type set for the Valve type parameter Power supply Valve 1 S1 GND NTC 50T105 C ratiometric SPKT R Press NTC WF Temp Connect the ratiometric pressure sensors and NTC temperature sensors to S1 and S3 respectively Probes For other types of probes or connections change the value of the EVD probes type parameter and see chap 4 O WARNING if a EVD unit is erroneously connected to a controller with a different communication protocol e g EVD000 40 with pCO via pLAN and is then connected to a unit with the same protocol e g EVD000 40 with pCO or pC via tLAN the first time that the EVD is connected with the correct protocol it may take a few minutes to recognise the protocol if this waiting time seems
74. rs used to calculate the superheat number that defines the type of electronic valve used enable valve not closed error to be entered if the battery Is present number indicating the type of refrigerant used m EVD 030220227 rel 2 1 12 06 2008 19 o Alarms delay Alarms delay LOP enable StandAlone AUTOSETUP Parameter name Description Re install AUTOSETUP values confirm enable restore parameter default values Circuit EEV ratio percentage of the maximum capacity managed by the valve in the circuit where it is installed ompressor or unit apacity control Evaporator Type ool ool Mode eat Mode efr Mode ool Mode MOP tandby steps efr Mode maximum superheat temperature ADVANCED SETTINGS FINE TUNING Parameter name Description CH Circuit EEV Ratio percentage of the maximum capaci sed by the valve in the circuit where it is installed in CH mode H Superheat set cool mode adjust H Proportional gain H Integral time H Low Superheat HP Circuit EEV Ratio percentage of the maximum capacity managed by the valve in the circuit where it is installed in HP mode HP Superheat set heat mode adjust HP Proportional gain P Integral time HP Low Superheat DF Circuit EEV Ratio percentage of the maximum capacity managed by the valve in the circuit where it is installed in DF mode DF Superheat s
75. s above the set threshold LOP Defr Mode temperature at minimum operating Temperature at the minimum operating pressure allowed at the evaporator outlet in pressure LOP in DF mode DF mode When the temperature is less than the set threshold the system goes into LOP status activating the LOP status digital variable and LOP control the driver stops SH control and starts controlling the valve position so as to reach the LOP set point considering the LOP integral time parameter The driver resumes SH control when the temperature returns above the set threshold LOP Heat Mode 5 temperature at minimum operating Temperature at the minimum operating pressure allowed at the evaporator outlet in pressure LOP in HP mode HP mode When the temperature is less than the set threshold the system goes into LOP status activating the LOP status digital variable and LOP control the driver stops SH control and starts controlling the valve position so as to reach the LOP set point considering the LOP integral time parameter The driver resumes SH control when the temperature returns above the set threshold ee eee Integral time for low evaporation pressure LOP control see LOP cool mode pressure control LOP e T Tissu Active when in LOP control status see LOP cool mode pressure control status Low SH int time 5 _ 15 integraltimeforlowsuperheatcontrol Integral time for low superheat control see CH Low Superheat
76. stems used The controller is already enabled to switch off the EVD4 disable the Stand alone variable or modify the status of digital input D1 Fig 2 1 and run the supervisor program i e PlantVisor to monitor the system EVD 030220227 rel 2 1 12 06 2008 29 4 TECHNICAL AND CONSTRUCTIONAL SPECIFICATIONS Installation and storage specifications Probe connections Default ratiometric NTC 50T105 C Temperature Digital input Ratiometric NTC WF pressure SPKT R Fig 4 1 Other connections 57 DEDE MOLEX Mini Fit 538 39 01 2140 10 Vdc max or U 2 GND 92 GND GND Vr2 52 o U A 9 5 o E in 5 E E 2 fS NTC WF NTC HT TSQ SPKT R Fig 4 2 30 Operating conditions 10T60 C lt 90 RH non condensing Storage conditions 20T70 C lt 90 RH non condensing Index of protection IP20 Wire cross section 0 5 to 2 5 mm Dimensions 70 x 110 x 60 PTI of insulating materials 250V Protection against electric shock to be integrated into class and or Il equipment Degree of environmental pollution normal Resistance to heat and fire category D Immunity against voltage surges category 1 Surface temperature limits as per the operating conditions Assembl on DIN rail Case width 4 modules the module is made up of metal and plastic parts These must be Dieses X disposed of according to the waste disposal local legis
77. t even if CAREL or its branch offices affiliates have been warned of the possibility of damage Content 1 INTRODUCTION 7 Codes and Siria 7 12 Connecting To the main SIA rioni icaro 8 1 5 Operation of the service serial Port 8 TA SETI ME Add nnt NES Nanenane aerar innan 8 2 1 POWER supply sensors digital gici 9 2 2 Main serial port for connection to tLAN pLAN RS485 supervisor Modbus 9 2 5 Eppen TORO UR Ear DRM du UM D UM UNTEN 9 2 INPUTS AND OUTPUTS 9 VG 10 2 5 SEU Serial POl 10 3 1 Application with uC and uC SE EVD000 40 and EVD000 43 via tLAN 1 3 EVD APPLICATIONS CONNECTIONS LIST OF PARAMETERS AND OPERATING MODES 1 3 2 Application with pCO EVD000 40 and EVD000 43 via 14 3 3 Application as positioner EVD000 40 and EVDO00 43 eee 17 3 4 Application with pCO EVD000041 and EVD000044 Via PLAN e 19 3 5 Application with supervisor EVD000 42 and EVD000 45 RS485 22 3 6 Application with Modbus protocolli EVD0001460 RS485 24 4 TECHNICAL AND CONSTRUCTIONAL SPECIFICATIONS 30 5 TROUBLESHOOTING 31 APPENDIX I INSTALLING AND USING THE EVD4 UI PROGRAM 32 PIG SIT RP 32 LII
78. t point it still follows the fluctuations in the controlled variable due for example to measurement noise and it can be shown that alone it may not reach the set point maintaining a certain deviation from the latter The proportional action makes its contribution in the initial transient periods then when the error decreases it loses effectiveness To determine the proportional gain K consider the relationship between the input and output of a controller to be purely proportional as shown in the figure for two values different of the gain where the input and the output are represented as percentages of their field of variation Controller Controller Output Output 100 100 error error gt proportional band proportional band full scale error full scale error Fig 3 Defining the variation in the input as a percentage of its field of variation as the proportional band BP that causes a 100 variation in the output if the input and output signals have the Sue posie type and vary within the same field of values for example 4 to 20 mA the gain K is K 2 BP In the first diagram in Fig 3 Bp 50 hence Kp 2 while in the second BP 10 and thus Kp 10 The proportional action of the PID controllers is set by the operator as the proportional band changes EXAMPLE Consider the case of a controller with a 4 to 20 mA input and 0 to 10 V output when BP 10 a 1 6 mA variation in the input produces a variation from 0 to 10 V at
79. ters or variables Functional test Heat functional test The functional test is a status of the driver that is used to check the operation of the device and in particular to calibrate a number of variables enable restart following error When the driver signals one of the following errors Probe error alarm EEPROM error alarm EEV not closed authorisation is requested continue after the user has checked the existence and the seriousness of the problem type of evaporator in HP mode Identifies the type of exchanger used as the evaporator in heating mode Plates 2 Shell amp tube 3 Fast finned 4 Slow finned This section configures the integral time in the PID control parameters eee AN Integral time for high condensing temperature control see Hi TCond protection temperature control HiTcond maximum condensing temperature Maximum condensing temperature once exceeded the driver starts controlling the valve position based on this set point and considering the Hi TCond int Time Darameter 00 Maximum superheat temperature If HP and DF modes are also available this refers to control in CH mode bad Active when in high condensing temperature control mode see Hi TCond protection rature control status percentage of the maximum capacity This is the ratio between the maximum cooling capacity delivered by the valve and managed by the valve in HP mode the maximum in the circuit in HP mode Used to pre pos
80. tes an estimate for the error after t seconds based on the trend of the curve at the instant t see the following figure and therefore ensures that control will depend on a prediction of the error Td at a future instant of time e t stimato us e t T J e t Fig 6 The derivative action tries to understand where the error is going and how fast it is moving and reacts as a consequence the parameter Td determines how far into the future the prediction is made The derivative action 15 the fastest to react including to measurement noise unfortunately and is only helpful if the prediction is good that is if Td is not too high compared to the temporal changes in the error the difference can be seen by examining cases A and B in the figure The derivative action is ideally null in steady state however in reality it follows and tends to amplify the measurement noise therefore it is only useful in the initial transient periods It may be very useful however it Is also dangerous above all if the measurement of the controlled variable 15 noisy EVD 030220227 rel 2 1 12 06 2008 43 44 NOTE 45 NOTE 46 CAREL CAREL S p A Via dell Industria 11 35020 Brugine Padova Italy Tel 39 049 9716611 Fax 39 049 9716600 e mail carel carel com www carel com Agenzia Agency 030220227 rel 2 1 12 06 2008
81. the list of parameters visible on the EVD4 UI divided into write and read the meaning of each parameter is described in APPENDIX II while APPENDIX III shows a list of the values of the reference parameters in relation to certain typical applications Key m Main parameters required to start operation O Secondary parameters required for optimum operation Advanced parameters WRITE Mode Parameter name Description of the parameter Mode dependent parameters Fig 3 5 COOL DEFROST Circuit EEV ratio percentage of the maximum capacity managed by the valve in the circuit where it is installed attenuation coefficient with change in capaci COMMON MOP integral time lintegral time for high evaporation pressure MOP control Alarms delay LOP flow evaporation pressure LOP alarm dela Alarms delay probe error probe error alarm dela Global parameters Fig 3 5 number indicating the type of refrigerant used E BOO OU OOO Y Y enable disable relay opening following low superheat enable disable relay opening following MOP O S2 Pt1000 calib Blocked valve check time after which in certain conditions the valve is considered as being blocked enable restart following error 12 EVD 030220227 rel 2 1 12 06 2008 READ Parameter name Description System measurements Fig 3 5 EEV opening valve opening as a EEV positio
82. ut for up to 100 mA Table 2 1 For the power supply in particular observe the diagram shown EVD EVD4 power supply module 1 q E G voal Dn sav s3 Se 51 G B B su v veloc optional backup gt EVBAT00200 300 pn 08AT I I I do not connect if EVBAT is fitted I I 230 Vac 24 Vac Fig 2 2 2 2 Main serial port for connection to tLAN pLAN RS485 supervisor Modbus Removable terminal for connection to the MASTER unit uChiller pCO or the supervisor PlantVisor line GNX RT RI Function Signal earth in electrical contact with GND on the I O connector signal for the RS485 connection pLAN supervisor Modbus or DATA signal for the tLAN connection v signal for the RS485 connection pLAN supervisor Modbus Table 2 2 2 3 Stepper motorr 6 pin MINIFIT connector Accepts cables up to 1 mm with MOLEX 5556 T barrel Line GND 2 3 4 Function Earth electrically connected to GND on the I O connector and with the earth connector on the electrical panel Phase Phase B Phase A Phase Table 2 3 EVD 030220227 rel 2 1 12 06 2008 MOLEX Mini Fit 538 39 01 2140 oalon sw s s 0 se ooo sun va oc Fig 2 1 PHOENIX MC1 5 3 ST 3 81 Fig 2 3 for code EVD00014 GND MOLEX MiniFit 538 39 01 2060 for code EVD00004 MOLEX MiniFit 538 39 01 2060 Fig 2 4
83. valves EVD000042 Controller with RS485 serial already configured for operation with supervisor address 250 universal for EEV1 valves EVD000043 Controller with tLAN serial already configured for operation with uChiller address 2 for valves EVD000044 Controller with RS485 serial already configured for operation with pCO via pLAN address 30 for CAREL valves EVD000045 Controller with RS485 serial already configured for operation with supervisor address 250 for CAREL valves EVD00014 EEV valve controller with spade connector EVD0001460 Controller with RS485 serial already configured for operation with Modbus EVD00004 1 Multiple packages of 10 pcs without connectors EVBAT00200 Battery charger module and step up transformer for backup power supply EVBAT00300 System made up of EVBAT00200 12 V 1 2 Ah battery cable and connectors EVBATBOXI0 Metal battery case CVSTDUTTLO USB converter to connect a PC to the service serial port CVSTDOTTLO RS232 converter to connect a PC to the service serial port EVDCAB0500 Package of 14 cables with terminals for MINIFIT connector length 5 m cross section 1 mm EVDCONO001 Packaging of connectors for 10 EVD for multiple packages of 10 pcs See the table on the corresponding instruction sheet or APPENDIX Il DESCRIPTION OF THE PARAMETERS valve type parameter 2 For the other types of probes see Chap 4 Technical and constructional characteristics The EVD00014 series with spa
84. versed Liquid returns to the sed and are open check the connections compressor during the Increase the superheat set point operation of the controller Increase the low superheat threshold and or decrease the low superheat integral time Valve blocked open Check if the superheat is low on one or more showcases with the valve position permanently at 0 Use manual control to close and open it completely If the superheat is always low check the electrical connections and or replace the valve The Circuit EEV ratio parameter is too high Try lowering the value of the Circuit EEV ratio parameter on all the utilities checking that there are no repercus on many showcases and the control set point is sions on the control temperature often reached for showcases onl Increase the low superheat threshold to at least 2 C higher than the low superheat value and or decrease the low very low for a few some minutes superheat integral time which must always be greater than zero The superheat never reaches very low values Set more reactive parameters increase the proportional factor increase the integral time increase the differential Liquid returns to the time to bring forward the closing of the valve even when the superheat is greater than the set point compressor only after Multiple showcases defrost at the same time Stagger the start defrost times If this is not possible if the conditions described in the two pre
85. vious points are not defrosting for showcases only present increase the superheat set point for the showcases involved The valve is greatly oversized Set the key11 parameter to 24717 valve type to 99 custom disable the extra steps in opening parameter and reduce the maximum valve steps parameter to a value that is 20 higher than the maximum valve position reached during normal control The time taken to reach steady operation after defrosting will be longer Liquid returns to the The Circuit EEV ratio parameter is too high Lower the value of the Circuit EEV ratio parameter compressor only when starting the controller after being OFF The condensing pressure swings Check that the condensing pressure is stable maximum 0 5bar from the set point If not try to stabilise the condensing pressure using the controller e g disable the condensing pressure control and operate the fans at maximum speed depending on the operating conditions of the installation The superheat set point is too low Increase the superheat set point checking that the temperature of the unit remains low and reaches the control set point If the situation improves adopt this new set point otherwise see the following points The superheat also swings with the driver in Observe the average operating position of the valve enable manual positioning and set the opening of the valve to The system swings manual control the average value observed if the swi
86. w the value set for MOP cool mode to effectively activate the MOP MOP cool mode The value set depends on the refrigerating unit and its design and is indeed a design value of the unit no recommendations can be made MOP integral time Recommended value 2 seconds to be increased to approx 10 seconds if the action Is too intense excessive closing of the valve as a response to high pressure and reduced to 1 second if the action Is insufficient excessively high evaporation temperature N B A value of 0 zero seconds completely disables the protection 40 EVD 030220227 rel 2 1 12 06 2008 APPENDIX IV SUMMARY OF PID CONTROL IV I Symbols used In this introduction to PID control reference is made to the following block diagram which is a simpli fled representation of an cycle control individual d n y VW 4 Fig 1 With the following symbols symbol meaning t Reference signal or set point w t Controlled or process variable t Value of the controlled or process variable e t Error defined as e t y t y t u t Control variable d t Load disturbance n t Measurement noise PID PID control P s Transfer function describing the process being controlled If the PID control manages the superheat value by positioning the electronic expansion valve which we have called the SH PID then P s N N E Fig 2 IV I Pid control law PID control in its simplest for
87. y messages The command will be executed if possible without any response Parity selection mode The parity 5 selected using the same program for setting the EVD4_UI Address as described in Ap If no parity is selected the number of stop bits will be 2 default After setting the new value the device needs to be switched off and on again to make tt effective Modbus messages The Modbus messages codes are 01 Read Coil Status 02 Read Input Status These two messages have the same effect as reading digital variables 03 Read Holding Registers 04 Read Input Registers These two messages have the same effect as reading analogue integer variables 05 Force Single Coil 06 Preset Single Register 15 Force Multiple Coils 16 Preset Multiple Regs A maximum number of 8 variables can be written with commands 15 and 16 17 Report Slave ID The message is structured as follows as regards the data part Description Type ON status Run indicator OxFF or 0x00 depending on whether the device is actively control byte ling or not Peripheral type high part and low part of the device code word Firmware release high part and low part of the FW release word Reserved word Hardware release high part and low part of the HW release word Reserved word Reserved word Reserved word EVD 030220227 rel 2 1 12 06 2008 25 Error messages exceptions 01 ILLEGAL FUNCTION The requested function is not avallable on the device 02 I
88. ypes of probes or connections change the value of certain applications Key W Main parameters required to start operation I Secondary parameters required the EVD probes type parameter and see technical leaflet for optimum operation Advanced parameters Fig 3 23 oe idi Mode Parameter name Parameter description Mode dependent parameters Fig 3 21 percentage of the maximum capacity managed by the valve Main superheat set point PID proportional factor integral time for superheat control dead zone for PID control PID derivative time low superheat value Cool Mode temperature at minimum operating pressure LOP in CH mode Advanced MOP Cool Mode temperature at maximum operating pressure MOP in CH mode integral time for low superheat control integral time for low evaporation pressure LOP control integral time for high evaporation pressure MOP control convertitore low superheat alarm dela converter low evaporation pressure LOP alarm dela CVSTDUTTLO high evaporation pressure MOP alarm dela MOP delay time when starting control enable disable manual valve positioning required motor position in manual control time after which the valve is considered as being blocked 1 To OD NL NL Key EVD probes type be of sensors used Service serial ort S2 Pt1000 calib calibration index for PT1000 sensor B Main serial port Advanced Probes offset 51 correction of S1

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