Emerson XM678D Operation And Installation Manual Download Page 1

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XM678D Controllers for Multiplexed
Cabinets with Interior Stepper Driver
Installation and Operation Manual for
Software Release 2.8

026-1219 Rev 3

Summary of Contents for XM678D

Page 1: ...XM678D Controllers for Multiplexed Cabinets with Interior Stepper Driver Installation and Operation Manual for Software Release 2 8 026 1219 Rev 3 ...

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Page 3: ...Emerson 1065 Big Shanty Road NW Suite 100 Kennesaw GA 30144 770 425 2724 www emerson com ...

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Page 5: ...ERSON EX3 VALVE 9 6 5 1 Solenoid Valve Connection 9 6 5 2 EX3 with 24Vac Coil Transformer Capacity 9 6 5 3 Stepper Valve Connection 10 6 5 4 EX3 C230 10 6 6 ABSOLUTE MAXIMUM POWER 10 6 7 KEYBOARD DISPLAY CX660 11 6 8 LAN CONNECTION 11 6 9 SENSORS FOR SUPERHEAT CONTROL 11 6 10 HOW TO USE A SINGLE PRESSURE TRANSDUCER ON MULTIPLEXED APPLICATIONS 12 6 11 HOW TO CONNECT THE MONITORING SYSTEM 12 6 12 DI...

Page 6: ...FF Temperature Regulation CrE n 28 16 3 2 Continuous Temperature Regulation CrE Y With Superheat Regulation 28 16 3 3 Continuous Temperature Regulation CrE Y Without Superheat Regulation 28 16 4 SELF ADAPTIVE OPERATING MODE AMS YES 28 16 5 MINIMUM STABLE SUPERHEAT SEARCH AMS YES ATU YES 28 16 6 VALVE CAPACITY REDUCING MNF PARAMETER 28 16 6 1 Auto Zero Procedure Go Home Functions 29 17 DISPLAY MESS...

Page 7: ...and Connect the Device 41 23 3 WIRING TYPES 42 23 4 MODBUS TERMINATION BLOCKS 43 24 DEFAULT PARAMETER MAP 44 25 XM678D CONTROLLER ASSOCIATION AND REPLACEMENT PROCEDURE 61 24 1 OVERVIEW 61 24 2 CASE CIRCUIT OUTPUT CONNECTIONS 61 24 3 DEFROST SYNCHRONIZATION 61 24 4 CASE CIRCUIT INPUT CONNECTIONS 61 24 4 1 Associating the XM678D with Case Control Circuit in E2 61 24 4 2 Replacing the XM678D on E2 63...

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Page 9: ...SAFETY PRECAUTIONS AND WARNINGS Check that the supply voltage is correct before connecting the device Do not expose to water or moisture use the controller only within the operating limits and avoid sudden temperature changes with high atmospheric humidity to prevent condensation from forming Warning Disconnect all electrical connections before performing any kind of maintenance Fit the probe wher...

Page 10: ...e contact digital inputs that are fully configurable by parameters The Hotkey connector allows simple programming of the controller The optional direct serial output RS485 that is MODBUS compatible permits simple XWEB interfacing Optionally an RTC is available Depending on the model the Hotkey connector can be used to connect the X REP display 3 2 Ordering Code 4 Quick Reference Guide in Running t...

Page 11: ...ator and keeping the superheating regulation stable at the same time The minimum allowed SH setpoint is LSH 2 C Set LSH low superheating limit A value between 2 to 4 is acceptable Default is LSH 3 Set SUb pressure filter Default is SUb 10 The value can increase up to 20 if the pressure variation respond too fast 5 Set the parameters for the temperature regulation Set the temperature setpoint Defau...

Page 12: ... on a vertical panel in a 29 x 71 mm hole and secured using the special bracket supplied Figure 5 1 The temperature range allowed for correct operation is 0 to 60 C Avoid places subject to strong vibrations corrosive gases excessive dirt or humidity The same recommendations apply to probes Allow air to circulate through the cooling holes Figure 5 1 XM678D Installation and Mounting Figure 5 2 XM678...

Page 13: ...prevent damages due to casual liquid infiltration It is recommended to place the thermostat probe away from air streams to measure the average room temperature correctly Place the defrost termination probe among the evaporator fans in the coldest place where most ice is formed and far from heaters or from the warmest place during defrost to prevent premature defrost termination 6 2 Wiring Guidelin...

Page 14: ...ail Solutions cannot be considered responsible in case of valve damage due to incorrect settings CAUTION 1 Configure the driver by making the correct changes on the parameters before connecting the valve Select the kind of motor tEU parameter and check if the valve is present in the tEP parameter table Table 6 2 2 The maximum distance between an XM controller and a valve must not exceed 10 meters ...

Page 15: ...4 wire valve harness When using the Inductor Extender P N 335 3500 any stepper valve harness extensions must not exceed 170 feet total length Use 14 AWG wire for valve harness extensions in conduit If the valve harness extension is not in conduit use 16 AWG or 14 AWG shielded cable with the shield terminated to an earth grounded chassis For valve harness extensions over 100 feet 14 AWG shielded ca...

Page 16: ...nvenient location An AC clamp meter will not have enough resolution to read the stepper valve milliamps If the current meter used is not a True RMS meter the readings will be approximately10 higher due to the stepper drive producing square waves and not sine waves 1 Power down the XM678D controller 2 Disconnect the Sporlan valve white wire from the XM678D controller 3 Connect the meter red lead fr...

Page 17: ...lve c With oA1 E3r connect the solenoid valve to the terminals 11 12 d With oA6 E3r connect the solenoid valve to the terminals 17 18 6 5 2 EX3 with 24Vac Coil Transformer Capacity When the coil of the EX3 is at 24Vac and a unique transformer is used to supply both the controller and the coil of the valve a 40VCA transformer must be used like TF40D Any transformer with lower capacity can damage th...

Page 18: ...ansformer should be used XM678D EX3 Terminal 49 Grey wire Terminal 48 Blue wire Terminal 47 Black wire Terminal 46 Brown wire Terminal 45 White wire Table 6 6 EX3 Unipolar Valve Terminals Figure 6 2 EX3 C230 Connection NOTE The electrical power absorption of the valve is not related to the valve s refrigeration power Before using the actuator please read the technical manual of the valve supplied ...

Page 19: ...ed defrost and the communication with the monitoring system are not guaranteed the Adr is also the MODBUS address See Figure 6 4 for an example of a properly configured LAN connection 6 9 Sensors for Superheat Control Temperature probe Pb6 Terminals 19 20 without any polarity Select the kind of sensor with the P6C parameter Pressure transducer Pb5 Terminals 21 signal input 22 power supply for 4 to...

Page 20: ...he status of the board GREEN LED if the LED is OFF then the LAN is not functioning otherwise check the remote pressure transducer Last Checks about the Superheat On the fast access menu dPP the value read by the gauge dP6 the value read by the temperature probe the temperature of the gas on the evaporator outlet SH the value of the superheat The nA or err message means that the superheat cannot be...

Page 21: ...r switch dEF external defrost AUS auxiliary activation command LiG light activation OnF board On OFF FHU do not use this configuration ES day night or HdY do not use this configuration The i1d parameter is for the delay of activation For the other digital inputs same set of parameters is present i2P i2F i2d i3P i3F i3d 6 13 Analog Output Can be set between 4 to 20mA and 0 to 10VDC Use a CABCJ15 ca...

Page 22: ...technical sheet of the device If problems occur contact Dixell Service department at 770 425 2724 Wiring Connection NOTE XEC Supercap and XM678D must be powered by two different transformers failure on observance of this rule may result to damage to the XEC Supercap and or to the connected XM678D XM678D XEC Terminal 61 Terminal 4 12Vdc Terminal 62 Terminal 3 gnd Table 7 1 XM678D and XEC Wiring Con...

Page 23: ...lator can be connected to the XM678D to close the stepper valve in case of power interruption Please refer to the ECP 024 manuals for the terms and conditions of use and limitations Wiring Connection 8 Wiring Layout for Sharing a Pressure Transducer on a LAN XM678D ECP 024 Terminal 61 Terminal Terminal 62 Terminal Table 7 2 XM678D and XEC Wiring Connection ...

Page 24: ...39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black 39 White 38 Black 37 White 36 Black Whit...

Page 25: ...examples dPP Err in the Master device the value of pressure read from the transducer is outside the acceptable range regarding parameters PA4 PA20 is connected incorrectly or it is not configured to parameter P5C PPF reading on the slave device LAN communication is not functional tPP LAn in the master controller LAN address sequences are not correct LPP Y means the address sequences are not correc...

Page 26: ...ed by pressing SET on the last digit 6 Navigate to the LPP of the Master device the device where the pressure probe is connected and select Y Set the LPP to N for all other slave devices 7 Navigate to tPP of the Master device and set it to PP Pressure Probe The slave devices tPP parameter will be set to LAn 8 Navigate to P5C parameter Pressure Probe will always be assigned to P5C of the Master dev...

Page 27: ...How to Enable a Pressure Probe to Share Across the LAN Wiring Connection to Site Supervisor 19 10 Wiring Connection to Site Supervisor Figure 10 1 Site Supervisor Wiring ...

Page 28: ...Auxiliary relay Energy Saving Multimaster enabled Generic alarm Clock time DURING PROGRAMMING The measurement units of temperature and pressure will blink Figure 11 1 XM678D Front Panel Table 11 1 Icons LIGHT ON OFF Light relay SET Press and release Show set point UP ARROW Press and release Fast access menu Press for 3 SEC menu browse parameter increase the value ON OFF Press and hold 3 device ON ...

Page 29: ... for three 3 seconds to enter the first level of the programming mode Double Commands 11 4 How to Modify the Air Temperature Regulation Setpoint The thermostat setpoint is the value used to regulate the air temperature The regulation output is controlled by the electronic valve or the relay BEGIN Press the SET key for three 3 seconds the measurement units will blink Value modification or Use the u...

Page 30: ...r1 menu the first label will display 2 Press down arrow until the Pr2 label displays and then press SET 3 A blinking PAS label displays Wait for a few seconds 4 When a blinking 0 displays enter the password 321 by pressing the up arrow and down arrow keys Press SET to save GENERAL STRUCTURE The first two items rtC and EEV are related to the submenus of the other parameters Pressing the SET up arro...

Page 31: ...to the next value HM Access to clock menu or reset the RTC alarm An Value of analog output SH Value of superheat nA not Available oPP Percentage of valve opening dP1 Pb1 Value read by probe 1 dP2 Pb2 Value read by probe 2 dP3 Pb3 Value read by probe 3 dp4 Pb4 Value read by probe 4 dP5 Pb5 Temperature read by probe 5 or value obtained from pressure transducer dP6 Pb6 Value read by probe 6 dPP Press...

Page 32: ... value 3 If the alarm nod is present enter the multimaster menu Select and confirm the LOC section Exit from multimaster menu Figure 14 1 Multimaster Function Menu SEC Action Button or display Notes Enter menu Press the up arrow key for about three 3 seconds the icon will be ON Waiting for action SEC The menu to change the section will be entered SEC label will be displayed Enter section list Pres...

Page 33: ... MdF time SAFETY and RtC or RtF ALARM With clock alarm the device will use the parameters IdF dtE and MdF MULTIMASTER DEFROST All the probes with clock CAUTION In this case the Adr parameter cannot be duplicated because defrost cannot be managed correctly BEGIN Press for three 3 seconds the EEU or other will be showed The measurement unit blinks Find Adr Press the down arrow key several times to f...

Page 34: ... or 0 5V LAN or probe not connected PA4 not used 0 5 bar not used P20 not used 7 0 bar not used 4 From the EEV submenu Select the correct kind of gas with the FTy parameter 5 Use the following parameters to set up the correct valve drive based on the valve data sheet of the manufacturer Table 15 1 Clock Setting and RTC Alarm Reset Note The rtC clock menu is present also on the second level paramet...

Page 35: ...AUTION Changing this parameter will require a valve restart When the programming mode ends the controller will automatically restart USt Maximum number of steps LSt to 800 10 Allows the user to select the maximum number of steps At this number of steps the valve should be opened completely Read the manufacturer s data sheet to set this parameter correctly Configure the value of this parameter with...

Page 36: ...aporator There is another valve at the beginning of the evaporator 4 Regulation pauses can be realized using Sti and Std parameters during these pauses the valve is closed 5 Increasing the Int integral time can decrease the speed of reaction of the regulator on the HY band 16 4 Self Adaptive Operating Mode AMS YES Auto adaptive means to find and maintain the condition of the lowest super heating a...

Page 37: ...osing the controller after gTH hours as soon as the opening open percentage is under 20 will force a go home procedure 1 Close the valve at max speed until the complete closure is reached 2 Perform extra steps Est 3 Re open to the requested regulation position This position is valid for all the valves and has to be done at set speed for each valve Figure 16 1 Capacity of Valve in Adjusted MnF Para...

Page 38: ...1 the cooling output works with Con and COF With defrost probe on error the defrost is performed only at interval For P5 P6 and PPF the percentage of the valve opening is fixed at PEO value TEMPERATURE ALARM 8 HA Temperature alarm from parameter ALU on probe rAL Outputs unchanged 9 LA Temperature alarm from parameter ALL on probe rAL Outputs unchanged 10 HAd Alarm from parameter dLU on probe defro...

Page 39: ... Minimum operating pressure threshold from LOP parameter The valve output increases its opening of dML quantity every second 19 MOP Maximum operating pressure threshold from MOP parameter The valve output decreases its opening of dML quantity every second 20 LSH Low superheating from LSH parameter and SHd delay The valve will be closed the alarm will be showed after SHd delay 21 HSH High superheat...

Page 40: ...rectly Err will display if there is an error or failure in programming End correct programming This means the controller will start regularly with the new programming Err failed programming In this case turn the controller OFF and then ON if you want to restart the download again or remove the Hot Key to abort the operation 4 Remove the Hot Key Note The procedure may fail if the firmware version a...

Page 41: ...temperature regulation It is recommended to use at least HY 12 F 6 0 C The int parameter is the integral time of the same PI regulator Increasing the int parameter causes the PI regulator to react slowly and is true vice versa To disable the integral part of regulation set int 0 19 2 3 Evaporator valves CrE EUP In this case the system performs a regulation of the temperature without considering th...

Page 42: ...mperature detected by the evaporator probe above which the fans are always OFF This can be used to verify that air is circulated only if this temperature is lower than set in the FSt 19 4 2 Control With Analog Output If Present The modulating output trA rEG works in a proportional manner excluding the first AMt seconds where the fans speed is the maximum 10 seconds is the minimum value The regulat...

Page 43: ...formed by switching the auxiliary relay ON and OFF on a 60 minute time base The ON time will be the AMt value so that the relay will be ON for AMt minutes and OFF for 60 AMt minutes In case of P4 error or if P4 is absent the output is at AMA value for the AMt time then the output is at 0 value for the time 255 AMt time performing a simple PWM modulation 19 6 Auxiliary Output The auxiliary output i...

Page 44: ... probes Digital Inputs Three 3 voltage free Relay Outputs Total current on loads MAX 16A Refer to Section 21 for UL Ratings Solenoid Valve relay SPST 5A 250Vac Defrost relay SPST 16A 250Vac Fan relay SPST 8A 250Vac Light relay SPST 16A 250Vac Alarm SPDT relay 8A 250Vac Aux SPST relay 8A 250Vac Valve Output Bipolar or unipolar valves Maximum Distance between Controller and Valve Up to 10m with shie...

Page 45: ...60 C Relative Humidity 20 to 85 no condensing Measuring and Regulation Range NTC probe 58 to 230 F 40 to 110 C PTC probe 67 to 302 F 50 to 150 C Pt1000 probe 148 to 212 F 100 to 100 C Resolution 1 C or 1 F or 0 1 C selectable Accuracy ambient temperature 77 F 25 C 0 5 C 1 digit Table 20 1 XM678D Technical Specifications ...

Page 46: ... cycles 240 Vac 1400 W Tungsten 6k cycles Terminals 16 and 15 Defrost 120 240 V 50 60 Hz 10A Resistive 30k cycles 120 240 V 50 60 Hz C300 Pilot Duty 30k cycles Terminals 14 and 13 Alarm not populated on XM66 series 120 240 V 50 60 Hz 5 A General Purpose 6k cycles 120 240 V 50 60 Hz 3 A Resistive 100k cycles Terminals 1 2 and 3 Stepper Valve 24 V models only 24 V 0 9 A maximum Terminals 45 to 49 Te...

Page 47: ...terminals and connect the MODBUS shield to the pin 38 terminal Terminate the end of the MODBUS network at the last XM678D device on the daisy chain with the MODBUS termination block P N 535 2711 or by connecting a 150 ohm resistor between the MODBUS terminals Refer to Appendix A Alternate MODBUS COM Wiring Method for E2 XR XM and XEV Devices Technical Bulletin P N 026 4148 Figure 22 1 XM678D to E2...

Page 48: ...sign as MODBUS Reverse polarity of on RS485 cable from E2 to the device 23 1 COM Port Associations E2 Versions 4 0 and Above An E2 has three COM ports that can be assigned for MODBUS communication COM2 COM ports can only be used for one function in other words if COM2 is set up as the I O network you cannot connect MODBUS devices to COM2 Ensure your E2 is configured in E2 General Services Serial t...

Page 49: ... set to match the baud rate of the XM678D device 19 2K All devices connected to the same COM port should be set to the same baud rate Data Size Leave this field at the default value 8 Parity Leave this field at the default value None Stop Bits Leave this field at the default value 1 6 Press to save changes and exit 23 2 2 Add and Connect the Device To enable communications between E2 and the XM678...

Page 50: ...us field You will see one of the following messages Online The device is communicating normally Offline The device is not communicating has not been commissioned is not functional or is not powered up Verify the device is powered up wired correctly and has the proper network address baud rate and parity Unknown The device is not communicating or has not been commissioned Verify the device is power...

Page 51: ...less Maximum Length 4000 ft 18 to 22 AWG 1219 2 m 2500 ft 24 AWG 762 m Nominal Impedance 120W 50W 23 4 MODBUS Termination Blocks Because the XM678D device has no on board means of termination use the MODBUS termination block P N 535 2711 for termination that can be wired to the end of the cable segment using the three pin connector Wire the two signal wires to the outside terminals and connect the...

Page 52: ...s Type of gas used by plant Fundamental parameter for correct functioning of all system LABEL REFRIGERANT OPERATING RANGE R22 r22 58 to 120 F 50 to 60 C 134 r134A 58 to 120 F 50 to 60 C 290 r290 Propane 58 to 120 F 50 to 60 C 404 r404A 94 to 120 F 70 to 60 C 47A r407A 58 to 120 F 50 to 60 C 47C r407C 58 to 120 F 50 to 60 C 47F r407F 58 to 120 F 50 to 60 C 410 r410A 58 to 120 F 50 to 60 C 448 r448A...

Page 53: ...egulation 0 to 255s PEO 0 Valve opening in case of error on probes P5 or P6 0 to 100 If a temporary probe error occurs valve opening percentage is PEo until PEd time is elapsed OPE 85 Start opening percentage for the time SFD It s not limited by the MnF parameter 0 to 100 Opening valve percentage when the start function is active This phase duration is SFd time SFd 0 0 Duration of soft start phase...

Page 54: ...4 to 60 0 PrU Ab PA4 to 60 0 PSI PrU rE PA4 to 870 PrU Ab PA4 to 870 dKP PrU rE PA4 to 600 PrU Ab PA4 to 600 Pressure value at 20mA for current probe 4 to 20mA or value at 5V for ratiometric probes The value is absolute or relative according to PrU parameter LPL 0 Lower Pressure Limit for superheat regulation PA4 to P20 EXPERT When the suction pressure goes down the lower bound LPL superheat regul...

Page 55: ...LSH value the valve will close immediately without waiting the SHd delay time to avoid evaporator flooding SHY 1 Hysteresis for superheat alarm recovery MSH SHY and LSH SHY 1 F to 45 F 0 1 C to 25 5 C SHd 0 0 Delay of superheat alarm signaling 0 0 to 42min00sec 252 If a superheat alarm occurs the delay time SHd expires before the controller shows an alarm Format min 10sec Resolution 10sec FrC 0 In...

Page 56: ...s sec For manual adjusting of the valve CPP 0 Current per phase duringbipolarvalve driving 0 to 100 10mA For manual adjusting of the valve CHd 0 Current per phase to maintain the actual position Holding current 0 to 100 10mA For manual adjusting of the valve GtH 0 Auto zero function 0 to 15h To prevent any possible wrong position caused by a long period without closing the valve the controller aft...

Page 57: ...tivation for the period of time set in this parameter AUX and Light can work AC 0 Anti short cycle delay 0 to 60min Interval between the solenoid valve stop and the following restart CCt 0 0 Continuous cycle duration 0 0 to 24h00min 144 Compressor ON time during continuous cycle Allows the length of the continuous cycle to set compressor stays ON without interruption for the CCt time It can be use...

Page 58: ...Local display default display nP 0 P1 1 P2 2 P3 3 P4 4 P5 5 P6 6 tEr 7 dEF 8 Selects which probe is displayed by the instrument nP no probe P1 P2 P3 P4 P5 P6 tEr virtual probe for thermostat dEF virtual probe for defrost rEd tEr Remote display default display nP 0 P1 1 P2 2 P3 3 P4 4 P5 5 P6 6 tEr 7 dEF 8 It selects which probe is displayed by the X REP nP no probe P1 P2 P3 P4 P5 P6 tEr virtual pr...

Page 59: ...ost the defrost relay perform an ON OFF regulation with Srt as set point Hyr 4 Differential for heater 1 F to 45 F 0 1 C to 25 5 C If the defrost probe temperature is bigger than Srt for all tod time the defrost ends although the defrost probe temperature is lower than dtE or dtS It permits to reduce defrost duration tod 255 Time out for heater 0 to 255min If the difference between the two defrost...

Page 60: ... downtime after defrost 0 to 255min Time interval between reaching the defrost termination temperature and the restoration of the control s normal operation This time allows the evaporator to eliminate water drops that might have formed due to defrost The fan and the thermoregulation outputs are OFF during this time dPo n Defrost at power ON n Y First defrost after startup Y immediately n after th...

Page 61: ...ion for the indicated time Fon 0 Fan ON time 0 to 15min With FnC C n or C Y fan activated in parallel with compressor it sets the evaporator fan ON cycling time when the compressor is OFF With Fon 0 and FoF 0 the fan is always OFF With Fon 0 and FoF 0 the fan is always OFF FoF 0 Fan OFF time 0 to 15min With FnC C n or C Y fan activated in parallel with compressor it sets the evaporator fan OFF cyc...

Page 62: ... P2 P3 P4 P6 tEr Selects the probe used to signal the alarm temperature ALC Ab Room temperature alarm configuration relative to setpoint or absolute rE Ab rE High and Low alarms related to the setpoint Ab High and Low alarms related to the absolute temperature ALU 41 High room temperature alarm setting 0 0 C to 32 0 C or ALL to 150 0 C ALC rE 32 F to 90 F or 0 0 C to 32 C ALC Ab ALL to 302 F or AL...

Page 63: ...Silencing alarm relay by pressing a key n Y OUTPUT CONFIGURATION OA1 CPr Relay on terminals 11 12 configuration nU CPr dEF FAn ALr LiG AUS db onF AC nU not used CPr compressor valve dEF defrost FAn Fan ALr Alarm LiG Light AUS auxiliary db heater for neutral zone not available with CrE Y onF ON OFF AC anti sweat E3r solenoid valve for EX3 or for mechanical solenoid valve OA6 AUS Relay on terminals ...

Page 64: ...ing the contact i1F dor Digital input 1 configuration EAL bAL PAL dor dEF AUS LiG OnF Htr FHU ES HdY EAL external alarm bAL serious external alarm PAL pressure switch activation dor door open dEF defrost activation AUS auxiliary activation LiG light activation OnF switch on off the instrument Htr change type of action FHU not used ES activate energy saving HdY activate holiday function d1d 15 Digi...

Page 65: ... the contact i3F ES Digital input 3 configuration EAL bAL PAL dor dEF AUS LiG OnF Htr FHU ES HdY EAL external alarm bAL serious external alarm PAL pressure switch activation dor door open dEF defrost activation AUS auxiliary activation LiG light activation OnF switch on off the instrument Htr change type of action FHU not used ES activate energy saving HdY activate holiday function d3d 0 Digital i...

Page 66: ...ost to other controllers dEM Y Defrost end Synchronization n Y n the end of the LAN defrosts are independent Y the end of the LAN defrosts are synchronized LSP n LAN setpoint Synchronization n Y n the setpoint value is modified only in the local section Y the section setpoint when modified is updated to the same value on all the other sections LdS n LAN Display Synchronization temperature sent via...

Page 67: ...e probe is read from the local probe Y the value of pressure probe is sent via LAN LCP n Probe 4 through the LAN n Y StM n Cooling request from the LAN enables compressor relay n Y n not used Y a generic cooling request from the LAN activates the solenoid valve connected to compressor relay ACE n Cooling request from the LAN enable even if compressor is stopped by door switch n Y n not used Y a ge...

Page 68: ...ON OFF percentage C R O read only Shows the effective cooling time calculated by XM600 during regulation cooling time percentage tMd Time remaining before the next defrost activation only for interval defrost read only Shows the time before the next defrost when interval defrost is selected LSn Auto Number of devices in the LAN 1 to 8 read only Shows the number of sections available in the LAN LAn...

Page 69: ... DEFR OUT DEW POINT OUT and RACK FAIL INV 24 3 Defrost Synchronization START DEFR OUT connection allows synchronization of the defrost of the XM678Ds associate with the circuit using the Defrost Schedule times under the Defr Times tab of the circuit Note The Circuit information under the Defrost tab is NOT shared with the XM678Ds 24 4 Case Circuit Input Connections The Case Control Circuit applica...

Page 70: ...the circuit To verify the connections from the Case Circuit to the XM678 select the circuit from the Case Control Association screen Figure 24 3 Press SETUP CKT and go to the Outputs tab Figure 24 2 Controller Associations List Figure 24 3 Case Control Association Screen Figure 24 4 Case Control Circuit Selection Figure 24 5 Case Control Circuit Outputs Tab ...

Page 71: ...ptions The word FULL should appear on the upper right hand corner of the screen If the CfgSyn Action parameter is not set to Send E2 Cfg to Device 1 Press LOOK UP 2 Select Send E2 Cfg to Device and press or 3 Disconnect and remove the faulty XM678D device from the network 4 Connect the new XM678D 5 Assign the address of the faulty XM678D to the new XM678D using the CX660 keyboard 6 Once the addres...

Page 72: ... the backup XM678D configuration that is in the E2 to the XM678D controller 13 Press to apply the command 14 The E2 XM678D configuration will be sent to the new XM678D Make sure to check the parameters and functionality on the device 15 Reboot the XM678D controller after five 5 minutes If P5 and P6 are flashing resend the E2 Cfg to Device and reboot after five 5 minutes Figure 24 9 Device Status S...

Page 73: ...ted with a 150 ohm resistor at the other end of the network segment 150 ohms between the two communication wires Recommended For reliable communication on some installations it may be necessary to connect a 100 ohm resistor between the XR XM or XEV device s previously identified ground terminal and earth ground Some E2 MODBUS COM Ports Can Support Two Network Segments For E2 Enhanced 4 x Controlle...

Page 74: ...Figure 1 MODBUS COM Wiring Diagram 66 XM678D I O Manual 026 1219 Rev 3 ...

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Page 76: ... Climate Technologies Retail Solutions Inc and or its affiliates collectively Emerson reserves the right to modify the designs or specifications of such products at any time without notice Emerson does not assume responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any product remains solely with the purchaser and end user 02...

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