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45

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Summary of Contents for EVD4

Page 1: ...EVD4 Driver for electronic expansion valve User manual...

Page 2: ......

Page 3: ...User manual...

Page 4: ...n 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 qualifi...

Page 5: ...er EVD000 40 and EVD000 43 17 3 4 Application with pCO EVD000041 and EVD000044 via pLAN 19 3 5 Application with supervisor EVD000 42 and EVD000 45 via RS485 22 3 6 Application with Modbus protocoll EV...

Page 6: ...6...

Page 7: ...d step up transformer for backup power supply EVBAT00300 System made up of EVBAT00200 12 V 1 2 Ah battery cable and connectors EVBATBOX10 Metal battery case CVSTDUTTL0 USB converter to connect a PC to...

Page 8: ...troller 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 to the 24 Vac powe...

Page 9: ...sed as power supply to the ratiometric probes S1 Analogue input for ratiometric probe or NTC low temperature probe S2 Analogue input for ratiometric probe NTC high temperature probe or Pt1000 S3 Analo...

Page 10: ...r cable Fig 2 8 Connect the USB cable to the PC if the EVD4 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 ap...

Page 11: ...roller 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 C2 via tLAN the first time that the EVD4...

Page 12: ...ttenuation coefficient with change in capacity SHeat dead zone dead zone for PID control Derivative time PID derivative time Low SHeat int time integral time for low superheat control LOP integral tim...

Page 13: ...tatus 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 memor...

Page 14: ...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 leve...

Page 15: ...de temperature at minimum operating pressure MOP in CH mode Heat Mode temperature at minimum operating pressure LOP in HP mode Defr Mode temperature at minimum operating pressure LOP in DF mode MOP Co...

Page 16: ...offset S2 correction of the lower limit of S2 Probes offset S3 correction of the lower limit of S3 ADVANCED SETTINGS SPECIAL TOOLS Not available ALARMS for driver X Parameter name Description alarm pr...

Page 17: ...ed to start operation Secondary parameters required for optimum operation Advanced parameters WRITE Parameter name Description Mode dependent parameters Fig 9 Calibr S4 gain mA current gain on channel...

Page 18: ...re described in 3 3 3 as follows Power up the EVD4 from the mains or via converter Connect EVD4 to the PC via the converter Set S4 probe type 5 configuration of input S4 as 4 to 20 mA or 6 0 to 10 V C...

Page 19: ...led 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 com...

Page 20: ...tegral time integral time for superheat control in CH mode CH Low Superheat low superheat value in CH mode heat mode adjust HP Circuit EEV Ratio percentage of the maximum capacity managed by the valve...

Page 21: ...om 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 insuffici...

Page 22: ...Prop gain PID proportional factor CH Integral time integral time for superheat control Advanced I SH dead zone dead zone for PID control Derivative time PID derivative time CH Low Superheat low superh...

Page 23: ...cient 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 in maximum evaporation pressure control st...

Page 24: ...erheat control LOP integral time integral time for low evaporation pressure LOP control MOP integral time integral time for high evaporation pressure MOP control Alarms del Low SH low superheat alarm...

Page 25: ...p 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 th...

Page 26: ...OGUE R ONLY REGISTER 50 to 86 ANALOGUE R W REGISTER 128 to 150 INTEGER R ONLY REGISTER 163 to 231 INTEGER R W COIL 1 to 20 DIGITAL R ONLY COIL 51 to 84 DIGITAL R W The correspondence between the Carel...

Page 27: ...I R W 8 REGISTER R W 170 I R W 9 REGISTER R W 171 I R W 10 REGISTER R W 172 I R W 11 REGISTER R W 173 I R W 13 REGISTER R W 174 I R W 14 REGISTER R W 175 I R W 16 REGISTER R W 176 I R W 17 REGISTER R...

Page 28: ...OIL R 12 D R 46 COIL R 13 D R 47 COIL R 14 D R 49 COIL R 15 D R 50 COIL R 16 D R 51 COIL R 17 D R 52 COIL R 18 D R 53 COIL R 19 D R 64 COIL R 20 D R W 1 COIL R W 51 D R W 2 COIL R W 52 D R W 3 COIL R...

Page 29: ...uired configuration 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 I INSTALLING AND...

Page 30: ...y 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 S1 S...

Page 31: ...verage 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 li...

Page 32: ...requires write access to the configuration files Open the IN EVD400UI INI file from the path where EVD4_UI exe is located and make sure that the Paddr parameter is set to 1 Start the EVD4_UI program...

Page 33: ...n Meaningoftheredorgreenrectangle GREEN FALSEorOFFor0orDISABLED inrelationtothemeaningofthereferenceparameter RED TRUEorONor1orENABLED inrelationtothemeaningofthereferenceparameter if the checkbox is...

Page 34: ...essure LOP alarm delay 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 wan...

Page 35: ...arameters and the auxiliary Driver protectors considering the control characteristics of the various types of system 1 Reciprocating 2 Screw 3 Scroll 4 Flooded cabinet 5 Cabinet Cond probe press A 12...

Page 36: ...ment 1 ratiometric pressure 2 NTC 103AT 10000 ohm at 25 C 3 NTC IHS 50000 ohm at 25 C 4 Pt1000 EVD type model of EVD used Model of EVD used from pCO EVD version H W I 100 0 0 0 driver hardware version...

Page 37: ...22 30 30 30 minimum control steps Position below which the valve is considered closed This parameter is only used during repositioning see CH Circuit EEV Ratio MODE I 16 0 0 0 READ ONLY received from...

Page 38: ...ut S1 4 5 V S1 probe limits Min I 41 1 1 1 zero scale for pressure sensor on input S1 Pressure value corresponding to the minimum of ratiometric output S1 0 5 V S2 Pt1000 calib I 68 0 0 0 calibration...

Page 39: ...s 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...

Page 40: ...patibility with the chosen refrigerant 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 o...

Page 41: ...dt Ti oppure u t K e t 1 e t dt Td de t dt This means that the control is calculated as the sum of three contributions P or proportional action Ke t k proportional gain I or integral action Ti K e t d...

Page 42: ...is Kp 100 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 cha...

Page 43: ...alue 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 directio...

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Page 48: ...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...

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