Emerson xm678d Operation And Installation Manual
  1. Manuals
  2. Brands
  3. Emerson Manuals
  4. Controller
  5. XM678D
  6. Operation and installation manual
Emerson xm678d Operation And Installation Manual

Emerson xm678d Operation And Installation Manual

Controllers for multiplexed cabinets wuth interior stepper driver
Hide thumbs Also See for xm678d:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Manual
XM678D Controllers for Multiplexed
Cabinets with Interior Stepper Driver
Installation and Operation Manual for
Software Release 2.8
026-1219 Rev 3

Advertisement

Table of Contents
loading

Related Manuals for Emerson xm678d

Summary of Contents for Emerson 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...
  • Page 3 Emerson 1065 Big Shanty Road NW, Suite 100 Kennesaw, GA 30144 770-425-2724 • www.emerson.com...

  • Page 5: Table Of Contents

    Table of Contents 1 INTRODUCTION................................1 1.1. G ........................1 ENERAL RECAUTIONS AND ARNINGS 2 BEFORE PROCEEDING ............................. 1 2.1. S XM678D ..........................1 OFTWARE ELEASE OF 3 OVERVIEW ................................... 2 3.1. G ..............................2 ENERAL ESCRIPTION 3.2. O ................................2 RDERING 4 QUICK REFERENCE GUIDE IN RUNNING THE SELF ADAPTIVE REGULATION ........
  • Page 6 19.3.1. Defrost starting ..............................33 19.3.2. Defrost Ending ..............................34 19.4. F ..................................34 19.4.1. Control With Relay............................34 19.4.2. Control With Analog Output (If Present)......................34 19.5. A ............................. 34 WEAT EATERS vi • XM678D I&O Manual 026-1219 Rev 3...
  • Page 7 IRCUIT NPUT ONNECTIONS 24.4.1. Associating the XM678D with Case Control Circuit in E2 ................61 24.4.2. Replacing the XM678D on E2 ......................... 63 APPENDIX A - ALTERNATE MODBUS COM WIRING METHOD FOR E2, XR, XM, AND XEV DEVICES .65 Table of Contents • vii...

  • Page 9: Introduction

    XM678D Please read the following safety precautions and warnings before using this manual: 1. Look at the software release of XM678D printed on WARNING! An isolated transformer for the the label of the controller. XM678D power supply must be used. Do not share power with any other devices.

  • Page 10: Overview

    It can be 1. After wiring the XM678D; configure the type of inserted in a proprietary Local Area Network (LAN) valve, bipolar or unipolar, via tEu (Default ...
  • Page 11 • Set the temperature setpoint. Default is -5°C. -50 to 60°C • Set the differential HY Default is 2°C. Table 4-1 - XM678D Gas Table • If the capacity of the valve is higher than 3. Configure the probes: requested, it can be reduced by the parameter.

  • Page 12: Installation And Mounting

    Installation and Mounting The XM678D controller can function without any user interface, but normal application is with the CX660 keyboard. Figure 5-1 - XM678D Installation and Mounting The CX660 keyboard should be mounted on a vertical panel, in a 29 x 71 mm hole, and secured using the special bracket supplied (Figure 5-1).

  • Page 13: Wiring Diagram And Connections

    (where most ice is formed) and far from heaters or Table 6-1 - Wiring Guidelines from the warmest place during defrost to prevent premature defrost termination. 6.3. XM678D Wiring and Connections Figure 6-1 - XM678D Wiring and Connections Important Note Wiring Diagram and Connections • 5...

  • Page 14: Valve Connections And Configuration

    10 meters. NOTE: In any case, the unique and valid reference has to be considered the data sheet made by valve manufacturer. Emerson Retail Solutions cannot be considered responsible in case of valve damage due to incorrect settings.
  • Page 15 *Sporlan SEI 50 *Sporlan SEH(I) 100 *Sporlan SEH(I) 175 See Table 6-3 below for the recommended Sporlan valve manual settings Emerson  EX4-EX5-EX6 Emerson EX3 Table 6-2 - XM678D Stepper Valve and Default Values Extra Steps Minimum Maximum Current Holding Step Rate...
  • Page 16 9. If step 8 reading was less than 0.3A, power down should be near 120 mA AC, for a CPP setting of 16, the XM678D controller and move the meter red the measured current should be near 160 mA AC.

  • Page 17: 4-Wire Valves (Bipolar)

    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. Wiring Connection of Emerson EX3 Valve Wiring Diagram and Connections • 9...

  • Page 18: Stepper Valve Connection

    XM678D is capable of driving a wide range of stepper used to drive the valve; verify that the values are lower valves. Table 6-7 lists the maximum amount of than those indicated in Table 6-7.

  • Page 19: Keyboard Display Cx660

    6.7. Keyboard Display CX660 The XM678D controller can also operate without the Use twisted shielded cable AWG 18 or less in case of keyboard. long distance. Polarity: Max Distance: 30m • Terminal [34] [-] • Terminal [35] [+] Figure 6-3 - XM678D Keyboard Display 6.8.

  • Page 20: How To Use A Single Pressure Transducer On Multiplexed Applications

    Figure 6-6 - Pressure Transducer on Multiplexed Applications A working LAN connection is required (green LED lit on all XM678D boards of the same LAN). Connect Figure 6-7 - Connecting the Monitoring System and configure the pressure transducer only on one XM678D of the network.

  • Page 21: Digital Inputs

    The analog output is located near the terminal [39] on a two-pin connector. The analog output can be used to 6.12. Digital Inputs control anti-sweat heaters using a chopped phased controller, XRPW500 (500 watt) or family, XVxxD or XVxxK. Figure 6-9 - Digital Inputs •...

  • Page 22: Battery Back Up Connection

    Battery Back Up Connection 7.1. XEC Supercap Connection XEC Supercap is designed to be used with Dixell products (XM678D, XEV, IEV, and others); compatibility with Dixell devices has to be verified in the user manual/technical sheet of the device. If problems occur, contact Dixell Service department at 770-425-2724.

  • Page 23: Emerson Ecp-024 Connection

    Terminal 62 (-) Terminal - The Emerson ECP-024 rechargeable accumulator can be connected to the XM678D to close the stepper Table 7-2 - XM678D and XEC Wiring Connection valve in case of power interruption. Please refer to the ECP-024 manuals for the terms and conditions of use and limitations.
  • Page 24 Black White Black White Black White Black White Black Shield Termination Block White Black Ground Figure 8-1 - Wiring Guidelines for Sharing a Pressure Transducer Across Multiple Units on the Same Circuit 16 • XM678D I&O Manual 026-1219 Rev 3...

  • Page 25: Pressure Transducer Setup

    Pressure Check for error messages. Error message examples: Transducer Setup • 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.

  • Page 26: Rs485 Connection

    P5C parameter will be set to nP (No Probe). NOTE: If pressure is not being shared across Shielded Serial Cable the LAN, each XM678D will need its own Pressure Transducer. Please reference Figure 8-1. Figure 9-1 - Sharing a Pressure Transducer Between Devices on...

  • Page 27: Wiring Connection To Site Supervisor

    10 Wiring Connection to Site Supervisor Figure 10-1 - Site Supervisor Wiring How to Enable a Pressure Probe to Share Across the LAN Wiring Connection to Site Supervisor • 19...

  • Page 28: User Interface

    ON/OFF Press and release: Show set point Press and hold 3”: device ON/OFF Figure 11-1 - XM678D Front Panel 11.2. Icons Cooling Output Light The output is activated when the icon is ON. A delay is present when the icon is blinking.

  • Page 29: Keyboard Commands

    11.3. Keyboard Commands • LIGHT relay: Press the light button Wait for 10 seconds to exit. Press and release the SET button to display the air temperature setpoint (value • AUX relay: Press the down arrow button displays for 60 seconds). •...

  • Page 30: How To Program The Parameters (Pr1 And Pr2)

    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. 22 • XM678D I&O Manual 026-1219 Rev 3...

  • Page 31: Fast Access Menu

    13 Fast Access Menu The Fast Access menu contains the list of probes and values that are automatically emptied by the board such as the superheat and percentage of valve opening. The values: nP or noP stands for probe not present or value not emptied, and Err means the value is out of range, or the probe is damaged, not connected or configured incorrectly.

  • Page 32: Multimaster Function Menu (Sec)

    2. To modify a parameter value in the device with [Adr = 35]: find the relevant indexed section (the the LOC section to switch OFF the icon. one linked to [Adr = 35]). Enter the multimaster 24 • XM678D I&O Manual 026-1219 Rev 3...

  • Page 33: Synchronized Defrost

    and at every power ON. 14.1. Synchronized Defrost • DEFROST START: At the time selected by the parameters Ld1 to Ld6 or Sd1 to Sd6. The synchronized defrost allows multiple defrosts to • DEFROST END: If the probes reach the dtE be managed from different boards connected through temperature or for maximum MdF time.

  • Page 34: Commissioning

    FUL= full step. Use this setting for the bipolar ratiometric P5C=420 or 5Vr with parameter P5C. valve. [3] Range of measurement: Check the conversion parameters, PA4 and P20, that are related to the transducer. 26 • XM678D I&O Manual 026-1219 Rev 3...

  • Page 35: Regulation For Superheat: Self Adaptive Or Manual Operating Mode

    16 Regulation for Minimum number of steps: (0 to USt) Allows selection of the minimum number of Superheat: Self steps. At this number of steps, the valve should be closed. Read the manufacturer’s data sheet to Adaptive or set this parameter correctly.Configure the value of this parameter within the allowed range of functioning.

  • Page 36: On/Off Temperature Regulation [Cre = N]

    5. Increasing the Int integral time can decrease the The regulation band is not affected from the speed of reaction of the regulator on the HY band. modification of the MnF parameter. 28 • XM678D I&O Manual 026-1219 Rev 3...

  • Page 37: Auto Zero Procedure (Go Home Functions)

    See the figure below (Figure 16-1) for the behavior of the capacity of the valve, when the MnF parameter is adjusted. Figure 16-1 - Capacity of Valve in Adjusted MnF Parameter  NOTE: During the soft start phase (oPE, SFd), MnF parameter is not taken in consideration and the capacity of the valve is set by the parameters oPE and oPd, respectively.

  • Page 38: Display Messages

    Not present (configuration) noP, nP Not available (evaluation) The keyboard is not able to communicate Verify the connection or call the Emerson Retail with the XM668D or XM678D Solutions Technical Service. ALARM FROM PROBE INPUT Sensor brake down, value out of range or...

  • Page 39: Alarm Recovery

    Display Causes Notes Pressure switch lock i1F, i2F o i3F = PAL. All the outputs are OFF. ELECTRONIC VALVE ALARM Minimum operating pressure threshold from The valve output increases its opening of dML LOP parameter. quantity every second. Maximum operating pressure threshold from The valve output decreases its opening of dML MOP parameter.

  • Page 40: Use Of The Programming Hot Key

    Hot Key to abort the operation. 4. Remove the Hot Key. Note: The procedure may fail if the firmware version and the controller models are different. 32 • XM678D I&O Manual 026-1219 Rev 3...

  • Page 41: Controlling Loads

    19 Controlling Loads 19.2.1. Standard regulation: [CrE = n] The HY parameter is the differential for the standard ON/OFF regulation. In this case, the int parameter is neglected. 19.2.2. Continuous regulation:  19.1. Cooling Output [CrE = Y] The HY parameter is the proportional band of the PI Regulation is performed according to the temperature that is in charge of the room temperature regulation.

  • Page 42: Defrost Ending

    ASr, the proportional band is always located above the [SET + ASr] value and its value is PbA. The fans are at minimum speed AMi when the Figure 19-2 - Anti-Sweat Heaters 34 • XM678D I&O Manual 026-1219 Rev 3...

  • Page 43: Auxiliary Output

    Probe 4 should be placed on the showcase glass. For each cabinet, only one probe 4 (P4) can be used; the P4 will send its value to the other sections that are connected to the LAN. Functioning with Probe 4 within the LAN: XM6x8D_1 XM6x8D_3+ XM6x8D_2 +...

  • Page 44: Technical Data

    8 DIN Screw terminal block ≤ 1.6 mm heat-resistant wiring and 5.0 Connections mm Faston or screw terminals An isolated transformer for the XM678D power 24VAC - supply must be used. Do not share power with any other Power Supply devices.
  • Page 45 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 ±0.5 °C ±1 digit (ambient temperature 77°F (25°C)) Table 20-1- XM678D Technical Specifications Auxiliary Output Technical Data • 37...

  • Page 46: Ul Ratings

    Stepper Valve (24 V models only): 24 V, 0.9 A maximum Terminals 45 to 49 Table 21-1- XM678D UL Ratings Temperature - Maximum ambient operating temperature 60°C Pollution Degree - 2 (Normally only nonconductive pollution. However, a temporary conductivity caused by condensation may be expected.)

  • Page 47: E2 Modbus Network Wiring

    • Do not connect the shield of the MODBUS network to the E2 PIB center terminal. Instead, use a 100 ohm 1/2 watt resistor to connect the MODBUS cable shield to earth ground. • At each XM678D device, wire the MODBUS cable to the RS485 +/- terminals and connect the MODBUS shield to the pin 38 terminal.

  • Page 48: Ect Modbus Networking To E2S

    XM678D XM678D XM678D Connecting a XM678D controller to an E2 requires the E2 to be version 2.84 or above. Contact Emerson Retail Solutions for upgrade information if the Figure 23-2 - MODBUS Networking controller is a version before 2.84. An E2 has up to three COM ports that can be assigned 23.1.

  • Page 49: E2 Setup Of Devices

    23.2.2. Add and Connect the Device Figure 23-4 - MODBUS Networking To enable communications between E2 and the XM678D units, the devices must be added and 23.2. E2 Setup of Devices addressed in E2. 23.2.1. Set Up Network Ports 1.

  • Page 50: Wiring Types

    Replace the device with a new . In the list of MODBUS devices, choose the one or a device that has the latest version of address number corresponding to the XM678D firmware on it. address set up through the front display, and press ...

  • Page 51: Modbus Termination Blocks

    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.

  • Page 52: Default Parameter Map

    -45 to 60°C -94 to 120°F/ r507 -70 to 60°C -69 to 120°F/ r513A -45 to 60°C -58 to 120°F/ r744 - Co2 -50 to 60°C Table 24-1 - Default Parameter Map 44 • XM678D I&O Manual 026-1219 Rev 3...
  • Page 53 Label Value Description Range Notes This parameter enables the search of the Minimum STABLE No; Yes minimum stable superheat. The lowest superheat search admitted value is LSH+2°C. This parameter enables the self adaptive Self adaptive SH regulation of the superheat. CrE = no No;...
  • Page 54 LOP to P20 device will signal this situation closing of dML generating the MOP alarm (according value to PrU parameter). Table 24-1 - Default Parameter Map 46 • XM678D I&O Manual 026-1219 Rev 3...
  • Page 55 Label Value Description Range Notes If the suction pressure exceeds the Minimum operating minimum operating pressure value, the pressure threshold PA4 to MOP device will signal this situation and valve opening generating the LOP alarm (according to of dML value PrU parameter).
  • Page 56 If [CrE = Y] or [CrE = EUP] then HY Differential [0.1°C to 25.5°C] is the proportional band for temperature PI controller. On these cases the value should be greater than 5°C. Table 24-1 - Default Parameter Map 48 • XM678D I&O Manual 026-1219 Rev 3...
  • Page 57 Label Value Description Range Notes This value is used only when  [CrE = Y] or [CrE = EUP]. It is the Integral time for integral time for thermoregulation: high room temperature 0 to 255s values mean slower regulation. regulation 0 (zero) = no integral action With [CrE = Y] or [CrE = EUP], the regulation becomes PI, HY becomes a...
  • Page 58 Second probe used to regulate room nP(0); P1(1); P2(2); temperature. If [rPb = nP], the Regulation probe B P3(3); P4(4); P6(5) regulation is performed with the real value of rPA. Table 24-1 - Default Parameter Map 50 • XM678D I&O Manual 026-1219 Rev 3...
  • Page 59 Label Value Description Range Notes Defines the percentage of the rPA with respect to rPb. The value used to Virtual probe regulate the room temperature is percentage 0 to 100% obtained by: (room temperature) value_for_room = (rPA*rPE + rPb*(100-rPE))/100 DEFROST First probe used for defrost.
  • Page 60 ON during the defrost Fan operating mode C-n; C-Y; O-n; O-Y O-n = continuous mode, OFF during the defrost O-Y = continuous mode, ON during the defrost Table 24-1 - Default Parameter Map 52 • XM678D I&O Manual 026-1219 Rev 3...
  • Page 61 Label Value Description Range Notes Time interval between the ending of Fan delay after 0 to 255min defrost and the starting of the defrost evaporator fans. If the difference of temperature between Temperature [0°F to 90°F] the evaporator and the room probes is differential to avoid [0.0°C to 50.0°C] more than the value of the FCt...
  • Page 62 [0.1°C to 25.5°C] alarm. alarm Time interval between the detection of Room temperature 0 to 255min an alarm condition and the alarm delay corresponding alarm signaling. Table 24-1 - Default Parameter Map 54 • XM678D I&O Manual 026-1219 Rev 3...
  • Page 63 Label Value Description Range Notes After powering the device: time interval between the detection of the Delay of temperature alarm condition and the temperature alarm 0.0 to 24h00min alarm signaling. at start-up Format: hours.10min  Resolution: 10min At the end of the defrost cycle: time Alarm delay at the interval between the detection of the 0 to 255min...
  • Page 64 CL = the digital input is activated by Digital input 2 closing the contact. OP; CL polarity OP = the digital input is activated by opening the contact. Table 24-1 - Default Parameter Map 56 • XM678D I&O Manual 026-1219 Rev 3...
  • Page 65 Label Value Description Range Notes EAL = external alarm; bAL = serious external alarm; PAL = pressure switch activation; dor = door open; dEF = defrost activation; EAL; bAL; PAL; dor; AUS = auxiliary activation; Digital input 2 dEF; AUS; LiG; OnF; configuration LiG = light activation;...
  • Page 66 Y n = the light command acts only in the Synchronization local section. Y = the light command is sent to all the other sections. Table 24-1 - Default Parameter Map 58 • XM678D I&O Manual 026-1219 Rev 3...
  • Page 67 Label Value Description Range Notes This parameter indicates if the AUX command of the section will act also on all the other sections: n; Y n = the light command acts only in the Synchronization local section. Y = the light command is sent to all the other sections.
  • Page 68 Shows the original code of the - - - Parameter table (read only) parameter map. - - - Pr2 menu access (read only) Access to the protected parameter list. Table 24-1 - Default Parameter Map 60 • XM678D I&O Manual 026-1219 Rev 3...

  • Page 69: Xm678D Controller Association And Replacement Procedure

    Case Temp, Defrost Status, and Refrigeration Status information from the Procedure XM678D. See Figure 24-7 and Figure 24-8 for example pointer connections of: CASE TEMP, CASE DEFR STATUS, and CASE REFR STATUS. 24.4.1. Associating the XM678D with Case Control Circuit in E2 24.1.Overview...
  • Page 70 Figure 24-4 - Case Control Circuit Selection To verify the connections from the Case Circuit to the 7. Scroll to the field of the XM678D device that XM678, select the circuit from the Case Control will be associated with the Case Control Circuit, ...

  • Page 71: Replacing The Xm678D On E2

    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 address has been assigned, press ...
  • Page 72 9. Press to enter the Status screen. Figure 24-11 - Applications Command Figure 24-9 - Device Status Screen 14. The E2 XM678D configuration will be sent to  10. Press to open Actions Menu. the new XM678D. Make sure to check the parameters and functionality on the device.

  • Page 73: Appendix A - Alternate Modbus Com Wiring Method For E2, Xr, Xm, And Xev Devices

    COM2 supports two network segments: one on connector RS485-1A, and the second on connector  RS485-1B. For information on the maximum recommended number of XR, XM, and XEV devices for each network segment (load and bandwidth calculations), contact Emerson Retail Solutions Technical Support at 770-425-2724.
  • Page 74 Figure 1 - MODBUS COM Wiring Diagram 66 • XM678D I&O Manual 026-1219 Rev 3...
  • Page 76 Emerson 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.

Table of Contents