Carel EVD4 User Manual
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Carel EVD4 User Manual

Pid controller complete with driver for stepper motors specially designed for the management of electronic expansion valves in refrigerant circuits.
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Driver for electronic expansion valve
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Summary of Contents for Carel EVD4

  • Page 1 Driver for electronic expansion valve User manual...
  • Page 3 User manual...
  • Page 4 CAREL, its employees or its branch offi ces/affi liates 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,...

  • Page 5: Table Of Contents

    3.5 Application with supervisor (EVD000*42* and EVD000*45*) via RS485........22 3.6 Application with Modbus® protocoll (EVD0001460) via RS485 ........24 4. TECHNICAL AND CONSTRUCTIONAL SPECIFICATIONS 5. TROUBLESHOOTING APPENDIX I. INSTALLING AND USING THE EVD4-UI PROGRAM I.I Installation ..............................32 I.II Preparing the connections........................32 I.III Preparing the user interface .......................32 I.IV Saving the data ............................32...

  • Page 7: Introduction

    Controller with tLAN serial already confi gured for operation with µChiller (address 2) for CAREL valves EVD000044* Controller with RS485 serial already confi gured for operation with pCO via pLAN (address 30) for CAREL valves EVD000045* Controller with RS485 serial already confi gured for operation with supervisor (address 250) for CAREL valves...

  • Page 8: Connecting To The Main Serial Port

    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 (CVSTDUTTL0 or CVSTD0TTL0), plus a PC with USB or RS232 serial port.

  • Page 9: Power Supply, Sensors, Digital I/O

    2. INPUTS AND OUTPUTS Below is a description of the connectors supplied with the EVD00004*0 or purchased in separate packages (EVD400CON0 for the EVD00004*1). The drawings represent the connectors as seen after having been fi tted on the EVD 2.1 Power supply, sensors, digital I/O MOLEX ®...

  • Page 10: Relay

    Fig. 2.6 2.5 Service serial port Allows access to the functions of the EVD4; via PC. To access this connector: 1) Remove the cover by levering it with a screwdriver on the central notch (Fig. 2.7). 2) Locate the white 4-pin connector and insert the special converter cable (Fig. 2.8).

  • Page 11: Application With Μc 2 And Μc 2 Se (Evd000*40* And Evd000*43*) Via Tlan

    APPLICATIONS: CONNECTIONS, LIST OF PARAMETERS AND OPERATING MODE Below is a description of the connections, confi guration parameters, UI graphics and operating modes of the six codes available for the EVD4 in the different applications. 3.1 Application with µC and µC...
  • Page 12 3.1.2 List of parameters Below is 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.
  • Page 13 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.

  • Page 14: Application With Pco (Evd000*40* And Evd000*43*) Via Tlan

    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 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.
  • Page 15 Key: = Main parameters required to start operation; = Secondary parameters required for optimum operation; — = Advanced parameters. MANUFACTURER group SYSTEM SET Parameter name Description EVD type model of EVD used, from pCO EVD probes type number indicating the combination of sensors used to calculate the superheat Valve type number that defi...
  • Page 16 INPUT/OUTPUT group Parameter name Descriprion DriverX mode operating mode of the X-th driver, from pCO EEV mode man. enable/disable manual valve positioning EEV position calculated electronic expansion valve opening position Power request cooling capacity, from pCO RXXX refrigerant confi gured for the REFRIGERANT parameter Superheat superheat value measured Saturated temp.

  • Page 17: Application As Positioner (Evd000*40* And Evd000*43*)

    CVSTDUTTL0 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 Key: parameter is detailed in APPENDIX II. Service serial port Main serial port Key: = Main parameters required to start operation;...
  • Page 18 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 confi guration of the control parameters. The program can be started in different confi gurations so as to display the set of parameters that is suitable for the type of installation the EVD ;...

  • Page 19: Application With Pco (Evd000041* And Evd000044*) Via Plan

    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 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.
  • Page 20 Minimum steps minimum control steps — Maximum steps — maximum control steps Closing steps — steps completed in total closing Opening extra steps enable extra steps in opening — Custom valve confi guration Closing extra steps — enable extra steps in closing Phase current —...
  • Page 21 MAINTENANCE group Parameter name Description Manual mng. EEV Mode electronic expansion valve control mode, read EEV mode man. driver ‘X’ Requested steps required motor position in manual control. EEV position calculated electronic expansion valve opening position Driver ‘X’ status Go ahead enable restart following error Probes offset S1 correction of the lower limit of S1...

  • Page 22: Application With Supervisor (Evd000*42* And Evd000*45*) Via Rs485

    SPKT*R* Fig. 3.20 probes type” parameter and see technical leafl et. 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:...
  • Page 23 The program can be started in different confi gurations 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 confi guration.

  • Page 24: Application With Modbus® Protocoll (Evd0001460) Via Rs485

    Temperature Digital input Ratiometric Below is the list of parameters visible from the EVD4-UI, divided into write and read; the meaning of each is NTC*WF* pressure SPKT*R* detailed in APPENDIX II, while APPENDIX III shows a list of the values of the reference parameters in relation to For other types of probes or connections, change the value of certain applications.
  • Page 25 The Modbus address can be selected using the “EVD4_UI Address” connection as described in “Ap- pendix I – Installing and using the EVD4-UI 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.
  • Page 26 51 to 84 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 DESCRIPTION OF THE PARAMETERS”):...
  • Page 27 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 REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER...
  • Page 28 REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER REGISTER COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL COIL...
  • Page 29 The program can be started in different confi gurations 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 confi guration.

  • Page 30: Technical And Constructional Specifications

    Use a class II 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 Ω).

  • Page 31: Troubleshooting

    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...

  • Page 32: Appendix I. Installing And Using The Evd4-Ui Program

    APPENDIX I. INSTALLING AND USING THE EVD4-UI PROGRAM Below is a description of how to install and use the EVD4-UI confi guration and monitoring program I.I Installation To install the program: - download the required EVD4_UI*.zip fi le from http:\\KSA.Carel.com;...

  • Page 33: Loading The Data

    I.V Loading the data Pressing will open a dialogue box to read a fi le with the extension *.CFG: choose a fi le and press , all the data will be displayed in the various windows of the EVD400UI program. To transfer the data to the EVD press , the...

  • Page 34: Appendix Ii. Description Of The Parameters

    EEPROM memory Fault in the EEPROM memory, the system may request a GO AHEAD; contact the error Carel technical service if the origin of the error is not clear Alarm HiT asp active in conditions with excessive...
  • Page 35 Capacity control macroblock parameter that defi nes “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””...
  • Page 36 Dynamic proportio- attenuation coeffi cient with change in Parameter active for each change in capacity of the circuit: when the driver pre-posi- nal gain capacity tions the valve (see CH-Circuit/EEV Ratio, HP-Circuit/EEV Ratio, and DF-Circuit/EEV Ratio); the difference between the initial and the fi nal 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.
  • Page 37 HP-Proportional 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. This depends on the ratio between circuit capacity and valve capacity and on the maximum number of valve control steps.
  • Page 38 Power request cooling capacity Reading of the cooling capacity, from pCO Probes offset S1 correction of S1 Correction of the value measured by sensor S1 Probes offset S2 correction of S2 Correction of the value measured by sensor S2 Probes offset S3 correction of the lower limit of S3 Correction of the value measured by sensor S3 Refrigerant...
  • Page 39 “Number that defi nes 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...

  • Page 40: Appendix Iii. Parameter Settings

    Max [bar] EEV ratio” set [°C] time [sec] time [sec]” Chiller CAREL E2V = 4 Alco Ex5/6 = 7 NB consider double CH Sporlan 0.5/20, Alco Ex7 = 10 Proportinal Gain in case Sporlan 30, Alco Ex8, Danfoss of Inverter or Stepless...

  • Page 41: Appendix Iv. Summary Of Pid Control

    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- fi ed representation of an cycle control individual: y° P(s) Fig. 1 With the following symbols: symbol meaning y°(t)

  • Page 42: Integral Action

    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 set point) it still follows the fl...

  • Page 43: Derivative Action

    integral action. It is almost always the integral action that dominates the way in which the system reaches steady operation. The integral action by defi nition 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.
  • Page 45 NOTE __________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________...
  • Page 46 NOTE __________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________...
  • Page 48 Agenzia / Agency: 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...

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