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026-1210 Rev 0 09-FEB-2011

XR75CX Digital Controller for Medium-Low

Temperature Refrigeration Applications

Installation and Operation Manual

Содержание 318-6030

Страница 1: ...026 1210 Rev 0 09 FEB 2011 XR75CX Digital Controller for Medium Low Temperature Refrigeration Applications Installation and Operation Manual ...

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Страница 3: ...ity for any inaccuracies that may be contained herein In no event will Computer Process Controls Inc be liable for any direct indirect special incidental or consequential damages resulting from any defect or omission in this manual even if advised of the possibility of such damages In the interest of continued product development Computer Process Controls Inc reserves the right to make improvement...

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Страница 5: ...S 4 4 1 KEYS AND FUNCTIONS 4 4 2 USE OF LEDS 4 5 MAX AND MIN TEMPERATURE MEMORIZATION 5 5 1 HOW TO SEE THE MIN TEMPERATURE 5 5 2 HOW TO SEE THE MAX TEMPERATURE 5 5 3 HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED 5 6 MAIN FUNCTIONS 6 6 1 TO SET THE CURRENT TIME AND DAY ONLY FOR DEVICES WITH RTC 6 6 2 HOW TO SEE THE SETPOINT 6 6 3 HOW TO CHANGE THE SETPOINT 6 6 4 HOW TO START A MANUAL DEFROST 6 ...

Страница 6: ...ALLATION AND MOUNTING 17 12 ELECTRICAL CONNECTIONS 17 12 1 PROBE CONNECTION 17 13 HOW TO USE THE HOT KEY 18 13 1 HOW TO PROGRAM A HOT KEY FROM THE DEVICE UPLOAD 18 13 2 HOW TO PROGRAM A HOT KEY FROM THE DEVICE UPLOAD 18 14 ALARM SIGNALS 19 14 1 SILENCING BUZZER ALARM RELAY OUTPUT 19 14 2 ALARM RECOVERY 19 14 3 OTHER MESSAGES 19 15 SPECIFICATIONS 20 16 CONNECTIONS 21 17 E2 MODBUS NETWORK WIRING 22 ...

Страница 7: ...onfigurable through spe cial parameters that can be easily programmed through the keyboard 2 2 Ordering Code CAUTION This manual is part of the product and should be kept near the device for easy and quick reference The device should not be used for purposes differ ent from those described in this manual It cannot be used as a safety device Check the application limits before proceeding SAFETY PRE...

Страница 8: ... The fan control mode is selected by means of the Fnc parameter Fnc C_n fans will switch ON and OFF with the compressor and not run during defrost Fnc O_n fans will run even if the compressor is OFF and not run during defrost after defrost there is a timed fan delay allowing for drip time set by means of the Fnd parameter Fnc C_y fans will switch ON and OFF with the compressor and run during defro...

Страница 9: ...ning of the auxiliary relay can be set with these five parameters The differential is given by the SHy parameter 3 4 3 On Off Relay oA3 onF In this case the relay is activated when the control ler is turned ON and de activated when the controller is turned OFF 3 4 4 Neutral Zone Regulation When oA3 db the relay 1 4 can control a heater element to perform a neutral zone action oA3 cut in SEt Hy oA3...

Страница 10: ...e Press the DOWN arrow to see the MIN tem perature to browse the parameter codes in programming mode or to decrease the cur rently displayed temperature value Table 4 1 XR75CX Front Panel Keys and Functions Switches the device ON and OFF if onF oFF Switches the light ON and OFF if oA1 Lig Locks Unlocks the keyboard To enter programming mode Returns to room temperature display LED Mode Function ON ...

Страница 11: ...ill be restored 5 2 How to See the MAX Temperature 1 Press and release the UP arrow key 2 The Hi message will be displayed followed by the maximum temperature recorded 3 By pressing the UP arrow key again or by waiting 5 seconds the normal display will be restored 5 3 How to Reset the Max and Min Temperature Recorded 1 Press and hold the SET key for more than 3 seconds while the max or min tempera...

Страница 12: ...ore than 2 seconds to change the setpoint value 2 The value of the setpoint will be displayed and the C or F LED starts blinking 3 To change the setpoint value push the UP or DOWN arrows within 10 seconds 4 To memorize the new setpoint value push the SET key again or wait 10 seconds 6 4 How to Start a Manual Defrost Push and hold the DEF key for more than 2 seconds and a manu al defrost will start...

Страница 13: ...the UP DOWN arrow keys pressed for more than 3 seconds 2 The PoF message will be displayed and the keyboard will be locked At this point it will be possible to see the setpoint or the MAX or Min temperature stored only 3 If a key is pressed for more than 3 seconds the PoF message will be displayed 6 9 To Unlock the Keyboard Press the UP and DOWN arrow keys together for more than 3 seconds until th...

Страница 14: ...probe presence n not present y present o4 Fourth probe calibration 12 0 to 12 0 C Allows to adjust possible offset of the fourth probe Ods Outputs activation delay at start up 0 to 255 min This function is enabled at the initial start up of the device and inhibits any output acti vation for the period of time set in the parameter Ac Anti short cycle delay 0 to 50 min Minimum interval between the c...

Страница 15: ...od dtr it allows to set the visualization according to the percentage of the first and second probe as for the following formula dtr P1 P2 100 P2 DEFROST EdF Defrost mode only for control ler with RTC rtC Real Time Clock mode Defrost time follows Ld1 to Ld6 parameters on work days and Sd1 to Sd6 on holidays in interval mode The defrost starts when the time Idf is expired tdF Defrost type EL electr...

Страница 16: ...rature between the evaporator and the room probes is more than the value of the FCt parameter the fans are switched ON FSt Fans stop temperature 50 to 50 C 122 F Setting of temperature detected by the evaporator probe above which fans are always OFF Fon Fan ON time 0 to 15 min With Fnc C_n or C_y fan activated in parallel with compressor Sets the evaporator fan ON cycling time when the compressor ...

Страница 17: ... also used for the restart of the fan when the FSt temperature is reached ALd Temperature alarm delay 0 to 255 min Time interval between the detection of an alarm condition and alarm signaling dAo Exclusion of temperature alarm at start up from 0 0 min to 23 5 hr Time interval between the detection of the temperature alarm condition after device power ON and alarm signaling CONDENSER TEMPERATURE A...

Страница 18: ... alarm CA message is displayed dor door switch function dEF activation of a defrost cycle ES energy saving AUS auxiliary relay activation with oA3 AUS Htr kind of action inversion cooling heating FAn fan HdF Holiday defrost enable only with RTC onF to switch the controller OFF did 0 to 255 min with i2F EAL or i2F bAL digital input alarm delay 18 20 Delay between the detection of the external alarm...

Страница 19: ...uring work days Ex When Ld2 12 4 the second defrost starts at 12 40 during workdays Sd1to Sd6 Holiday defrost start 0 to 23 hr 50 min These parameters set the beginning of the 6 programmable defrost cycles on holidays Ex When Sd2 3 4 the second defrost starts at 3 40 on holidays NOTE To disable a defrost cycle set it to not used Ex If Ld6 not used the sixth defrost cycle is disabled OTHER PARAMETE...

Страница 20: ...lation 8 4 Door Switch Input This input signals the door status and the corre sponding relay output status through the Odc param eter no normal any change Fan Fan OFF CPr Compressor OFF F_C Compressor and fan OFF Since the door is opened after the delay time set through parameter doA the door alarm is enabled the display shows the message dA and the regulation re starts is rtr yES The alarm stops ...

Страница 21: ...ital Inputs 15 8 11 Digital Inputs Polarity The digital input polarity depends on the i1P and i2P parameters i1P or i2P CL the input is activated by closing the contact i1P or i2P oP the input is activated by opening the contact ...

Страница 22: ... system MODBUS RTU compat ible such as the X WEB500 3000 300 10 X REP Output Optional Optionally the RS485 serial line allows the con troller to connect to a monitoring system MODBUS RTU compatible such as the X WEB500 3000 300 To connect the X REP to the controller the fol lowing connectors must be used CAB 51F 1m CAB 52F 2m CAB 55F 5m Figure 10 1 X REP Output ...

Страница 23: ... cables verify that the power supply complies with the device s requirements Separate the probe cables from the power supply cables from the outputs and the power connections Do not exceed the maximum current allowed on each relay in case of heavier loads use a suitable external relay 12 1 Probe Connection The probes should be mounted with the bulb up wards to prevent damages due to casual liquid ...

Страница 24: ...t Key into the 5 pin receptacle and then turn the Controller ON 3 Automatically the parameter list of the Hot Key is downloaded into the controller memo ry the doL message is blinking followed a by flashing End LED 4 After 10 seconds the controller will restart and work with the new parameters 5 Remove the Hot Key NOTE The Err message is displayed in case of an error or failure in programming In t...

Страница 25: ... acc to par Con and CoF P2 Evaporator probe failure Defrost end is timed P3 Third probe failure Outputs unchanged P4 Fourth probe failure Outputs unchanged HA Maximum tempera ture alarm Outputs unchanged LA Minimum tempera ture alarm Outputs unchanged HA2 Condenser high tem perature It depends on the Ac2 parameter LA2 Condenser low tem perature It depends on the bLL parameter dA Door open Compress...

Страница 26: ...ge contact Relay Outputs Compressor SPST 8 3 A 250VAC or SPST 16A 250VAC AUX SPDT 8 3 A 250VAC or SPST 16 6 A 250VAC Fan SPST 5A 250VAC Defrost SPDT 8 3 A 250VAC Data Storing On the non volatile memory EEPROM Internal Clock Back up 24 hours Kind of Action 1B Pollution Grade 2 Software Class A Rated Impulsive Voltage 2500V Overvoltage Category II Temperatures Operating 0 to 55 C Storage 30 to 85 C ...

Страница 27: ...Other Messages Connections 21 16 Connections Figure 16 1 XR75CX Connections ...

Страница 28: ...stead use a 100 ohm 1 2 watt resistor to connect the MODBUS cable shield to earth ground At each XR75CX device wire the MODBUS cable to the RS485 terminals and connect the MODBUS shield to the pin 18 terminal Terminate the end of the MODBUS network at the last XR75CX device on the daisy chain with the MODBUS ter mination block P N 535 2711 or by connecting a 150 ohm resistor between the MODBUS ter...

Страница 29: ...eneral Servic es Serial tab to enable COM4 or an E2 Expansion COM Card P N 637 4871 to enable COM6 Connect the MODBUS network cable to the three terminal connector on the COM port you wish to as sign as MODBUS Reverse polarity of on RS485 cable from E2 to the device 18 1 E2 Setup of Devices 18 1 1 Set Up Network Ports Before setting up a device the port on the E2 that has the MODBUS cable connecte...

Страница 30: ...eld at the default value 1 6 Press to save changes and exit 18 1 2 Add and Connect the Device To enable communications between E2 and the XR75CX units the devices must be added and ad dressed in E2 1 Log in to the E2 with Level 4 access 2 Press Connected I O Boards and Controllers 3 In the Num Network Ctrls NetSetup screen under the ECT tab enter the number of de vices in the Quantity field Max sh...

Страница 31: ...evice is not communicating or has not been commissioned Verify the device is pow ered up wired correctly and has the proper network address baud rate and parity No Port No port is set up in the E2 Serial Config uration Manager to be a MODBUS port Wrong FW Rev This message is likely caused by the device having a firmware version older than the minimum revision required by E2 for communica tion Repl...

Страница 32: ...n be wired to the end of the cable segment using the three pin connector Wire the two signal wires to the out side terminals and connect the shield to pin 18 of the device keeping the exposed shield wire length as short as possible 3 inches ideal maximum length Figure 18 8 MODBUS Termination Block P N 535 2711 SHIELD WIRE CONNECT TO OF LAST DEVICE PIN 18 FROM OTHER DEVICES TO LAST DEVICE AT END OF...

Страница 33: ...o 150 0 C 67 to 302 F 5 Pr2 Con Compressor ON time with faulty probe 0 to 255 min 15 Pr2 CoF Compressor OFF time with faulty probe 0 to 255 min 30 Pr2 CF Temperature measurement unit C to F C Pr2 rES Resolution in integer dE decimal point dE Pr1 Lod Probe displayed P1 P2 P1 Pr2 Red2 X REP display P1 P2 P3 P4 SEt dtr P1 Pr2 dLy Display temperature delay 0 to 20 0 min 10 sec 0 0 Pr2 dtr P1 P2 percen...

Страница 34: ...arm at start up 0 to 23 hr and 50 1 3 Pr2 AP2 Probe for temperature alarm of condenser nP P1 P2 P3 P4 P4 Pr2 AL2 Condenser for low temperature alarm 100 to 150 C 67 to 302 F 40 Pr2 AU2 Condenser for high temperature alarm 100 to 150 C 67 to 302 F 110 Pr2 AH2 Differ for condenser temp alarm recovery 0 1 C to 25 5 C 1 F to 45 F 5 Pr2 Ad2 Condenser temperature alarm delay 0 to 254 min 255 not used 15...

Страница 35: ...3 0 Pr1 Ld3 3rd workdays defrost start 0 to 23 hr 50 min not used 21 0 Pr1 Ld4 4th workdays defrost start 0 to 23 hr 50 min not used not used Pr1 Ld5 5th workdays defrost start 0 to 23 hr 50 min not used not used Pr1 Ld6 6th workdays defrost start 0 to 23 hr 50 min not used not used Pr1 Sd1 1st holiday defrost start 0 to 23 hr 50 min not used 6 0 Pr1 Sd2 2nd holiday defrost start 0 to 23 hr 50 min...

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