Emerson XM670, XM679 Operation Manual

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XM670-XM679 Controllers for Multiplexed Cabinets Installation and Operation Manual

026-1218 Rev 4

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Emerson Commercial and Residential Solutions

1065 Big Shanty Road NW, Suite 100

Kennesaw, GA 30144 USA

770-425-2724 • 1-800-829-2724

www.emerson.com

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Contents

1 INTRODUCTION.......................................................................................................................................................... 1

1.1. G

ENERAL WARNING ..................................................................................................................................................... 1

2 OVERVIEW ................................................................................................................................................................... 1

2.1. G

ENERAL DESCRIPTION................................................................................................................................................ 1

2.2. O

RDERING CODES......................................................................................................................................................... 2

3 USER INTERFACE ...................................................................................................................................................... 2

3.1. K

EYS AND FUNCTIONS ................................................................................................................................................. 2

3.2. U

SE OF LEDS ............................................................................................................................................................... 3

3.3. H

OW TO ENTER THE FAST ACCESS MENU ................................................................................................................... 3

3.4. H

OW TO SEE THE MAX AND MIN TEMPERATURE RECORDED ................................................................................... 3

3.5. H

OW TO SEE AND MODIFY THE SETPOINT................................................................................................................... 3

3.6. H

OW TO START A MANUAL DEFROST.......................................................................................................................... 3

3.7. H

OW TO ENTER THE PARAMETERS LIST PR1 .............................................................................................................. 3

3.8. H

OW TO ENTER THE PARAMETERS LIST PR2 .............................................................................................................. 4

3.9. H

OW TO ASSIGN A MODBUS ADDRESS ..................................................................................................................... 4

3.10. H

3.11. ON/OFF F

4 FAST ACCESS MENU ................................................................................................................................................. 5

OW TO CHANGE THE PARAMETER VALUE............................................................................................................... 4

UNCTION.................................................................................................................................................... 4

5 SECTION MENU .......................................................................................................................................................... 6

5.1. T

O SET ENERGY SAVING TIMES................................................................................................................................... 6

5.2. T

O SET TIMED DEFROST PARAMETERS ........................................................................................................................ 6

6 ELECTRONIC EXPANSION VALVE MENU (FOR MODEL XM679 ONLY).................................................... 7

7 CONTROLLING LOADS ............................................................................................................................................ 7

7.1. S

OLENOID VALVE ......................................................................................................................................................... 7

7.2. S

TANDARDS REGULATION AND CONTINUOUS REGULATION ....................................................................................... 7

7.2.1. First Kind of Regulation: Standard Regulation.................................................................................................... 8

7.2.2. Second Kind of Regulation: Continuous Regulation (For Model XM679 Only).................................................. 8

7.3. D

EFROST ....................................................................................................................................................................... 8

7.3.1. Defrost starting..................................................................................................................................................... 8

7.3.2. Defrost Ending...................................................................................................................................................... 8

7.4. F

ANS ............................................................................................................................................................................. 9

7.4.1. Control With Relay................................................................................................................................................ 9

7.4.2. Control With Analog Output (If Present).............................................................................................................. 9

7.5. A

NTI-SWEAT HEATERS (IF PRESENT)........................................................................................................................... 9

7.6. A

UXILIARY OUTPUT ..................................................................................................................................................... 9

8 PARAMETERS LIST.................................................................................................................................................. 10

9 DIGITAL INPUTS....................................................................................................................................................... 19

9.1. G

ENERIC ALARM (EAL)............................................................................................................................................. 19

9.2. S

ERIOUS ALARM MODE (BAL)................................................................................................................................... 19

9.3. P

RESSURE SWITCH (PAL) .......................................................................................................................................... 19

9.4. D

OOR SWITCH INPUT (DOR) ....................................................................................................................................... 19

9.5. S

TART DEFROST (DEF)............................................................................................................................................... 19

9.6. R

ELAY AUX ACTUATION (AUS) ................................................................................................................................ 19

Table of Contents • 5

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9.7. RELAY LIGHT ACTUATION (LIG) ............................................................................................................................... 19

9.8. R

EMOTE ON/OFF (ONF) ............................................................................................................................................ 19

9.9. K

IND OF ACTION (HTR) .............................................................................................................................................. 19

9.10. FHU (N

9.11. E

9.12. C

9.13. D

OT USED) ..................................................................................................................................................... 19

NERGY SAVING INPUT (ES).................................................................................................................................... 19

ONFIGURABLE INPUT - HOLIDAY FUNCTION (HDY).............................................................................................. 20

IGITAL INPUTS POLARITY....................................................................................................................................... 20

10 INSTALLATION AND MOUNTING...................................................................................................................... 20

11 ELECTRICAL CONNECTIONS............................................................................................................................. 21

11.1. P

ROBE CONNECTIONS ............................................................................................................................................... 21

12 RS485 SERIAL LINE ................................................................................................................................................ 21

13 HOW TO USE THE HOT KEY ............................................................................................................................... 21

13.1. D

13.2. U

OWNLOAD (FROM THE HOTKEY TO THE DEVICE).................................................................................................. 21

PLOAD (FROM THE DEVICE TO THE HOTKEY) ....................................................................................................... 22

14 ALARM SIGNALS ................................................................................................................................................... 23

14.1. EE A

14.2. A

LARM................................................................................................................................................................ 24

LARM RECOVERY ................................................................................................................................................... 24

15 TECHNICAL DATA ................................................................................................................................................. 25

16 UL RATINGS ............................................................................................................................................................. 26

17 CONNECTIONS ........................................................................................................................................................ 27

17.1. E2

TO XM DEVICE COMMUNICATION RECOMMENDATIONS .................................................................................... 27

17.1.1. Wiring Guidelines ............................................................................................................................................. 27

17.2. XM670 - W

17.3. XM679 - 230VAC V

17.4. XM679 - 24VAC V

IRING DIAGRAM..................................................................................................................................... 27

ALVES/WIRING DIAGRAM....................................................................................................... 28

ALVES/WIRING DIAGRAM ......................................................................................................... 28

18 E2 MODBUS NETWORK WIRING ....................................................................................................................... 29

19 WIRING LAYOUT FOR SHARING A PRESSURE TRANSDUCER ON A LAN ............................................ 30

20 PRESSURE TRANSDUCER SETUP (XM679 ONLY) ......................................................................................... 31

20.1. RS485 N

ET MONITORING TEMPERATURES ............................................................................................................. 31

20.1.1. RS485 Connection............................................................................................................................................. 31

20.2. H

OW TO ENABLE A PRESSURE PROBE TO SHARE ACROSS THE LAN ...................................................................... 32

21 WIRING CONNECTION TO SITE SUPERVISOR.............................................................................................. 33

22 ECT MODBUS NETWORKING TO E2S............................................................................................................... 34

22.1. COM P

22.2. COM P

22.3. E2 S

ORT ASSOCIATIONS - E2 VERSIONS 3.XX AND BELOW ................................................................................ 34

ORT ASSOCIATIONS - E2 VERSIONS 4.0 AND ABOVE ................................................................................... 34

ETUP OF DEVICES .............................................................................................................................................. 35

22.3.1. Set Up Network Ports........................................................................................................................................ 35

22.3.2. Add and Connect the Device..................................................... ..................................... ................................... 35

22.4. W

22.5. MODBUS T

IRING TYPES .......................................................................................................................................................... 37

ERMINATION BLOCKS ........................................................................................................................... 37

23 DEFAULT SETTING VALUES............................................................................................................................... 38

TABLE 23-1 APPENDIX A - ALTERNATE MODBUS COM WIRING METHOD FOR E2, XR, XM, AND XEV

DEVICES ........................................................................................................................................................................... 45

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1 Introduction

2Overview

1.1. General Warning

Please read the following safety precautions and warnings before using this manual:

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 different from those described in this manual. It cannot be used as a safety device.

• Check the application limits before proceeding.

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 where it is not accessible by the end user. The device must not be opened.

• In case of failure or faulty operation, send the device back to the distributor or to Emerson (see address) with a detailed description of the fault.

• Verify the maximum current that can be applied to each relay (see Section 15, Technical Data).

• Ensure that the wires for probes, loads, and the power supply are separated and far enough from each other without crossing or intertwining.

• In case of applications in industrial environments, the use of main filters in parallel with inductive loads could be useful.



2.1. How to Check the Software Release of the XM679K

1. Check the software release of the XM679K printed on the label of the  controller.

Figure 2-1 - XM679K Software Release

2.2. General Description

Models XM670-XM679 are high level microprocessor based controllers for multiplexed cabinets, suitable for applications on medium or low temperature. It can be inserted in a Local Area Connection (LAN) of up to eight (8) different sections that can operate depending on the programming, as stand alone controllers or by following the commands coming from the other sections.

XM670/XM679 controllers can have six (6) relay outputs to control the solenoid valve, defrost that can be either electrical or hot gas, evaporator fans, lights, auxiliary output, alarm output and an output to drive pulsed electronic expansion valves (applicable for XM679 only).

The controllers can also have up to four (4) probe inputs: the first one for temperature control, the second for defrost end temperature control of the evaporator, the third for the display, and the fourth probe input can be used for applications with virtual probe or for inlet/outlet air temperature measurement. Model XM679 can exclusively have two (2) other probes that can be used for superheat measurement and regulation. Both XM670 and XM679 controllers

General Warning Introduction • 1

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are also equipped with three digital inputs (free contact) that are fully configurable through parameters.

The Hot Key connector allows simple programming of the controllers.

Direct serial output RS485 MODBUS-RTU compatible permits a simple XWEB interfacing. Depending on the model, the Hot Key connector can also be used to connect X-REP display.

2.3. Ordering Codes

Device

Name

XM670

XM679

Table 2-1 - Product Ordering Codes

Description

Solenoid Case Control

Pulse Case Control

Emerson

Part

Number

318-6520

318-6521

318-6700

318-6701

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3 User Interface

Measurement unit

Key Combinations

Locks/Unlocks the keyboard

Switches mode to programming mode

Exits the programming mode

Figure 3-1 - XM670 - XM679 Front Panel

3.1. Keys and Functions

Table 3-1 lists the keys that are found on the front

panel of XM670-XM679 controllers and the function of each:

Key Function

Press to display the target setpoint, to

select a parameter in programming mode,

or to confirm an operation. Pressing this

key for three (3) seconds while the

minimum or maximum temperature is

displayed will erase the temperature

currently displayed.

Press this key to browse the parameter

codes in programming mode or increases

the displayed value. Pressing this key for

three (3) seconds will give you access to

the Section menu.

Press this key to access the fast access

menu, browse the parameter codes in

programming mode, decrease the

displayed value, or activate or deactivate

an auxiliary output.

Starts a defrost when pressed for three (3)

seconds.

Switches the room light ON and OFF.

Press for three (3) seconds to switch the

device ON and OFF.

Table 3-1 - XM670/XM679 Front Panel Keys and Functions (Continued)

3.2. Use of LEDS

Each LED function is described in Table 3-2:

LED Mode Function

Compressor and valve regulation

Flashing Anti-short cycle delay enabled

ON Defrost enabled

Flashing Drip time in progress

ON An alarm is occurring

ON Energy saving enabled

ON Fans enabled (fans are running)

Flashing Door opened or delay after defrost

ON Auxiliary relay ON

ON Measurement unit

Flashing Programming phase

Flashing

enabled. percentage, enter the fast access menu.

The controller is ALL mode

The controller is remote virtual display mode

During the CLOCK modification (if clock is presen

To see the valve opening

working in 

working in

Table 3-1 - XM670

Keys and Functions User Interface • 3

/XM679 Front Panel Keys and Functions

Table 3-2 - LEDs

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3.3. How to Enter the Fast

Access Menu

1. Press and release the UP button.

2. The First Label will be displayed. Press the UP or DOWN button to navigate the menu.

1. Enter the programming mode by pressing the SET and DOWN buttons for a few seconds (wait for the measurement unit to start blinking).

2. The controller will show the first parameter present in Pr1.

3.8. How to Enter the Parameters List PR2

3.4. How to See the MAX and MIN Temperature Recorded

1. Press and release the UP button.

2. The First Label will be displayed. Press the UP or DOWN button to navigate the menu. Search the L°t label and press SET to see minimum temperature; search the H°t label and press SET to see maximum temperature.

3.5. How to See and Modify the Setpoint

1. Press the SET button for three (3) seconds to show the setpoint value.

2. The measurement unit starts blinking.

3. To change the setpoint value, press the UP or DOWN button for 10 seconds.

4. To store the new setpoint value, press the SET key again or wait 10 seconds.

To access the parameter list in Pr2:

1. Enter the Pr1 lev el . F ol lo w t he st ep s i n Section 3.7.,

How to Enter the Parameters List PR1.

2. Select Pr2 parameter and press the SET key.

3. The PAS flashing message will display, followed shortly by “0 --” with a flashing zero.

4. Use the UP or DOWN button to input the security code in the flashing digit. Confirm the security code by pressing SET. The security code is 321.

5. If the security code is correct, the access to Pr2 is enabled by pressing SET on the last digit.

3.6. How to Start a Manual Defrost

Press the DEF key for more than three (3) seconds to start a manual defrost.

3.7. How to Enter the

Figure 3-2 - Parameters List 2

Another way to enter the programming mode is by pressing the SET and DOWN buttons for 30 seconds immediately after switching the controller ON.

NOTE: Each parameter in Pr2 can be removed or put into Pr1 (user level) by pressing SET + DOWN buttons. When a parameter is present in Pr1, the Alarm LED will be display.

Parameters List PR1

To enter the parameter list in Pr1 (user accessible parameters):

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3.9. How to Assign a MODBUS Address

1. To enter the programming mode, press and hold the SET and DOWN buttons together until the temperature measurements start blinking.

2. Scroll through the parameters using the UP or DOWN button until Adr is displayed.

3. Press and hold SET to select Adr.

4. Use the arrow keys to choose the address number of the device.

5. Press and hold SET again to select the desired number and save.

6. To exit, press the SET and UP arrow keys together.

3.10.How to Change the Parameter Value

1. Enter the programming mode.

2. Select the required parameter using the UP or DOWN button.

3. Press the SET key to display the parameter value (measurement unit starts blinking).

4. Use the UP or DOWN button to change the value.

5. Press SET to store the new value and move to the next parameter.

6. To exit, press SET + UP keys or wait 15 seconds without pressing a key.

NOTE: During the OFF status, the Light and AUX buttons are active.

NOTE: The set value is stored even when the time-out expires and ends the procedure.

3.11.ON/OFF Function

By pressing the ON/OFF key, the controller shows OFF. During the OFF status, all the relays are switched OFF

and the regulations are stopped; if a monitoring system is connected, it does not record the controller data and alarms.

How to Assign a MODBUS Address User Interface • 5

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4 Fast Access Menu

This menu contains the lists probes and some values that are automatically evacuated by the board, such as the superheat and the percentage of valve opening. The values below stands for:

• nP or noP - probe not present or value not evacuate

• Err - value out of range, probe damaged, not connected or incorrectly configured

FAST ACESS MENU

HM Fast Access Menu to Clock Settings (If present)

SH Superheat Shows the actual superheat value (Only XM679)

oPP Valve opening percentage Shows the actual opening percentage of the valve (Only XM679)

dP1 Probe 1 value displaying Shows the temperature measured by probe 1

dP2 Probe 2 value displaying Shows the temperature measured by probe 2

dP3 Probe 3 value displaying Shows the temperature measured by probe 3

dP4 Probe 4 value displaying Shows the temperature measured by probe 4

dP5 Probe 5 value displaying Shows the temperature measured by probe 5

dP6 Probe 6 value displaying Shows the temperature measured by probe 6

dPP Pressure probe value

rPP Remote pressure probe value

L°t Minimum measured temperature Shows the minimum temperature read by the regulation probe

H°t Maximum measured temperature Shows the maximum temperature read by the regulation probe

dPr Virtual regulation probe value Shows the value measured by the virtual regulation probe

dPd Virtual defrost probe value Shows the value measured by the virtual defrost probe

dPF Virtual fans probe value Shows the value measured by virtual fan probe

rSE Real setpoint

Fast Access to Analog Output Reading

(If present)

Shows the value of pressure measured by pressure transducer  (Only XM679)

Shows the value of pressure received by remote pressure probe connected to other XM600 device (Only XM679)

Shows the setpoint used during the energy saving cycle or during the continuous cycle

Table 4-1 - Fast Access Menu

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5 Section Menu

This menu allows the user to access to a particular feature of the XM series related to the LAN (Local Area Network) of controllers. Depending on the programming of this menu, a single keyboard can control either the module of the local section of the LAN or ALL. The possibilities are: LOC: the keyboard controls and display the value, the status, and the alarms of the local section of the LAN; and ALL: the command given by the keyboard are effective on all the sections of the LAN.

1. Press the UP key for more than three (3) seconds.

2. The label corresponding to the section controlled by the keyboard will be displayed.

3. Using the UP or DOWN key, select the section you want to control.

4. Press the SET key to confirm and exit.

5.1. To Set Energy Saving Times

ILE Energy Saving cycle

dLE Energy Saving cycle

ISE Energy Saving cycle

dSE Energy Saving cycle

HES Temperature 

Table 5-1 - Energy Saving Times Parameters

start during  workdays

ength during 

workdays

start on ho

ength on holidays

increase during the Ener

lidays

gy Saving cycle

(0 to 23 h 50 min) During the Energy Saving cycle, the setpoint is increased by the value in HES so that the operation setpoint is SET + HES.

(0 to 24 h 00 min) Sets the duration of the Energy Saving cycle on workdays.

(0 to 23h 50 min)

(0 o 24h 00 min)

(-54 to 54°F/ -30 to

°C) Sets the

30 increasing value of the setpoint during the Energy Saving cycle.

5.2. To Set Timed Defrost Parameters

Ld1

Workday

defrost start

Ld6

Sd1

Holiday 

defrost start

Table 5-2 - Timed Defrost Parameters

NOTE: To disable a defrost cycle, set it to nu (not used). For example, if Ld6=nu, the sixth defrost cycle is disabled.

(0 to 23h 50 min) These parameters set the beginning of the eight programmable defrost cycles during workdays. For example, when Ld2=12.4, the second defrost starts at 12.40 during workdays.

(0 to 23h 50 min) These parameters set the beginning of the eight programmable defrost cycles during holidays. For example, when Sd2=3.4, the second defrost starts at 3.40 on holidays.

To Set Energy Saving Times Section Menu • 7

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6 Electronic

Expansion Valve Menu (For Model XM679 Only)

1. Enter the programming mode by pressing the SET and DOWN buttons for a few seconds (measurement unit starts blinking).

2. Press the UP or DOWN key until the controller displays the EEU label.

3. Press SET. You are now in EEV function menu.

7 Controlling Loads

7.1. Solenoid Valve

The regulation is performed based on the temperature measured by the thermostat probe that can be a physical probe or a virtual probe obtained by a weighted average between the two probes (see

Section 8, Parameters List) with a positive

differential from the setpoint. If the temperature increases and reaches setpoint plus the differential, the solenoid valve is opened and then it is closed when the temperature reaches the setpoint value again.

In case of fault in the thermostat probe, the opening and closing time of the solenoid valve are configured by Con and CoF parameters.

7.2. Standards Regulation and Continuous Regulation

The regulation can be performed in two ways:

• Standard regulation is reaching the best superheat via a classic temperature regulation obtained using hysteresis.

• Continuous regulation permits the use of the valve to realize a high performance temperature regulation

with a good factor of superheat precision. This only

can be used only in centralized plants and it is available only with electronic expansion valve by selecting the CrE=Y parameter.

In any case, the regulation is performed via the PI regulator that gives the opening percentage to the valve via PWM modulation explained as follows: Opening Percentage is obtained from the average of the Opening Time with respect to the CyP time period

Figure 7-1).

(see

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Figure 7-1 - Regulation via PI Regulator

Opening percentage is the percentage of the cycle period where the valve is open. For example, if

CyP=6s (standard value) and the valve is opened at 50%, this means that the valve is opened for three (3)

seconds during the cycle period.

7.2.1. First Kind of Regulation: Standard Regulation

In this case, the Hy parameter is the differential for the standard ON/OFF regulation. In this case, the int parameter is neglected. The regulation follows the diagram shown in

Figure 7-2 - First Kind of Regulation

Figure 7-2:

7.2.2. Second Kind of Regulation: Continuous Regulation



(For Model XM679 Only)

In this case, the Hy parameter is the proportional band of PI in charge of room temperature regulation. It is advisable to use at least Hy=10°F/ 5.0°C.

The int parameter is the integral time of the same PI regulator. Increasing the int parameter will cause the PI regulator to react more slowly, and is true vice versa. To disable the integral part of regulation, set int=0.

Figure 7-3 - Second Kind of Regulation

7.3. Defrost

7.3.1. Defrost starting

In any case, the device checks the temperature that is read by the configured defrost probe before starting defrost procedure. After that:

• Starting defrost cycles can be operated locally (manual activation by means of the keyboard or digital input or end of interval time) or the command can come from the Master defrost unit of the LAN. In this case, the controller will operate the defrost cycle following the parameters it has programmed, but at the end of the drip time it will wait until all the other LAN controllers finish their defrost cycle before the normal regulation of the temperature is restarted according to the dEM parameter.

• Every time any of the LAN controllers begin a defrost cycle, it issues the command to the network making all the other controllers start their own cycle. This allows a perfect synchronization of the defrost in the whole multiplexed cabinet according to LMd parameter.

• By selecting the dPA and dPb probes and changing the dtP and ddP parameters, defrost can be started when the difference between the dPA and dPb probes is lower than dtP for all ddP time. This is useful to start defrost when a low thermal exchange is detected. If ddP=0, this function is disabled.

7.3.2. Defrost Ending

•If dPA and dPb are present and d2P=y, the controller stops the defrost procedure when dPA is higher than the dtE temperature and dPb is higher than the dtS temperature.

At the end of defrost, the drip time is controlled through the Fdt parameter.

Defrost Controlling Loads • 9

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7.4. Fans

7.5. Anti-Sweat Heaters 

7.4.1. Control With Relay

The fan control mode is selected by means of the FnC parameter:

• C-n = running with the solenoid valve, OFF during defrost

• C-y = running with th1e solenoid valve, ON during defrost

• O-n = continuous mode, OFF during defrost

• O-y = continuous mode, ON during defrost

An additional parameter FSt provides the setting of temperature, detected by the evaporator probe, above which the fans are always OFF. This ensures that air is circulated only if the temperature is lower than set in FSt.

7.4.2. 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). The regulation setpoint is relative to the regulation setpoint and is indicated by the parameter 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 temperature read by the fan probe is SET+ASr and the fans are at maximum speed (AMA) when the temperature is SET+ASr+PbA.

(If Present)

This control is performed when trA=AC. In this case, there are two ways to control the anti-sweat heaters:

• Without real dewpoint information: in this case, the default value for dewpoint is used (SdP parameter).

• Dewpoint received from the XWEB5000 system: the SdP parameter is overwritten when the valid value for dewpoint is received from XWEB.

The P4 probe is used to perform the regulation and it should be placed on the showcase glass. 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.

Figure 7-5 - Anti-Sweat Heaters

7.6. Auxiliary Output

The auxiliary output is switched ON and OFF by means of the corresponding digital input or by pressing and releasing the DOWN key.

Figure 7-4 - Control with Analog Output

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8 Parameters List

EEU Access to EEV submenu (only XM679)

Differential: (1 to 45°F; 0.1 to 25.5°C) This is the intervention differential for setpoint, this value is always

positive. Solenoid valve Cut IN is Setpoint Plus Differential (Hy). Solenoid valve Cut OUT is when the temperature reaches the setpoint.

REGULATION

Int

CrE

LS Minimum setpoint limit: (-67°F to SET; -55.0°C to SET) Sets the minimum acceptable value for the setpoint.

US Maximum setpoint limit: (SET to 302°F; SET to 150°C) Set the maximum acceptable value for setpoint.

OdS

AC Anti-short cycle delay: (0 to 60 min) The interval between the solenoid valve stop and the following restart.

CCt

CCS

Con

CoF

Integral time for room temperature regulation (Only XM679): (0 to 255 s) This is the integral time for room temperature PI regulator. 0= no integral action.

Continuous regulation activation (Only XM679): (n to Y) n= standard regulation; Y= continuous regulation. Use it only in centralized plants.

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 activation for the time set in the parameter. (AUX and Light can work)

Compressor ON time during continuous cycle: (0.0 to 24.0h; resolution 10min) Allows to set the length of the continuous cycle: compressor stays on without interruption for the CCt time. Can be used, for instance, when the room is filled with new products.

Setpoint for continuous cycle: (-67 to 302°F / -55 to 150°C) it sets the setpoint used during the continuous cycle.

Solenoid valve ON time with faulty probe: (0 to 255 min) The time during which the solenoid valve is active in case of faulty thermostat probe. With COn=0 solenoid valve is always OFF.

Solenoid valve OFF time with faulty probe: (0 to 255 min) time during which the solenoid valve is off in case of faulty thermostat probe. With COF=0 solenoid valve is always active.

DISPLAY

PrU

PMU

PMd

rES Resolution (for °C): (in = 1°C; dE = 0.1 °C) allows decimal point display

Lod

Table 8-1 - XM670 to XM679 Parameters List

Auxiliary Output Parameters List • 11

Temperature measurement unit: °C = Celsius; °F = Fahrenheit. CAUTION! When the measurement unit is changed the parameters with temperature values have to be checked.

Pressure mode: (rEL or AbS) defines the mode to use the pressure. CAUTION! the setting of PrU is used for all the pressure parameters. If PrU = rEL all pressure parameters are in relative pressure unit, if PrU = AbS all pressure parameters are in absolute pressure unit. (Only XM679)

Pressure measurement unit: (bAr - PSI - MPA) it selects the pressure measurement units. MPA= the value of pressure measured by kPA*10. (Only XM679)

Way of displaying pressure: (tEM - PrE) it permits showing the value measured by pressure probe with  tEM= temperature or by PrE= pressure (Only XM679)

Device display: (nP; P1; P2, P3, P4, P5, P6, tEr, dEF) it selects which probe is displayed by the device. P1, P2, P3, P4, P5, P6, tEr= virtual probe for thermostat, dEF= virtual probe for defrost.

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red

Remote display: (nP; P1; P2, P3, P4, P5, P6, tEr, dEF) it selects which probe is displayed by the X-REP. P1, P2, P3, P4, P5, P6, tEr= virtual probe for thermostat, dEF= virtual probe for defrost.

dLy

rPA

rPb

rPE

Display delay: (0 to 24.0 m; resolution 10s) when the temperature increases, the display is updated of  1 °F/1°C after this time.

Regulation probe A: (nP; P1; P2, P3, P4, P5) first probe used to regulate room temperature. If rPA = nP the regulation is performed with real value of rPb.

Regulation probe B: (nP; P1; P2, P3, P4, P5) second probe used to regulate room temperature. If rPb = nP the regulation is performed with real value of rPA

Regulation virtual probe percentage: (0 to 100%) it defines the percentage of the rPA respect to rPb. The value used to regulate room temperature is obtained by: value_for_room = (rPA*rPE + rPb*(100-rPE))/100

ELECTRONIC EXPANSION VALVE SUBMENU (Only XM679)

FtY

Kind of gas (R22, 134, 404, 407, 410, 507,CO2): Type of gas used by plant. Fundamental parameter for correct functioning of all system.

SSH Superheat setpoint: [1°F to 45°F] [0.1°C to 25.5°C] This is the value used to regulate superheat.

CyP Cycle Period: (1 to 15s) Allows to set cycle time

Pb Proportional band: (1 to 108°F / 0.1 to 60.0) PI proportional band

rS Band Offset: (-21 to 21°F / -12.0 to 12.0°C) PI band offset

inC Integration time: (0 to 255s) PI integration time

PEO

Probe Error opening percentage: (0 to 100%) if a temporary probe error occurs, valve opening percentage is PEo until PEd time is elapsed.

Probe Error delay before stopping regulation: (0 to 239 sec. - On = unlimited) if probe error duration is bigger

PEd

than PEd then valve totally closes. Pf message displays. If PEd = On valve opening is PEo until probe error finishes.

OPE

SFd

OPd

Pdd

MnF

dCL

Start opening Percentage: (0 to 100%) Valve opening percentage when start function is active. This phase duration is SFd time.

Start Function duration: (0.0 to 42.0 min: resolution 10s) Sets start function duration and post-defrost duration. During this phase the alarms are neglected.

Opening Percentage after defrost phase: (0 to 100%) Opening valve percentage when after defrost function is active. This phase duration is Pdd time.

Post Defrost Function duration: (0.0 to 42.0 min: resolution 10s) Sets start function duration and post-defrost duration. During this phase the alarms are neglected.

Maximum opening percentage at normal Functioning: (0 to 100%) during regulation it sets the maximum valve opening percentage.

Delay before stopping valve regulation: (0 to 255s) When the cooling request goes off, the electronic valve regulation can go on for the dCL time in order to prevent uncontrolled superheat variation.

Forced opening percentage: (0 to 100% - nu) it permits to force the valve opening to the specified value. This

Fot

value overwrites the value calculated by PID algorithm. CAUTION! To obtain the correct superheat regulation you have to set Fot = nu.

Type of Pressure Transducer: (PP - LAn) it sets type of pressure transducer to use: PP= 4 to 20mA pressure

tPP

transducer or ratiometric transducer 0 to 5V depending on P5C parameter, LAn= the pressure signal arrives from another XM600. Referred to Pb5

Table 8-1 - XM670 to XM679 Parameters List

12 • XM679K I&O Manual 026-1218 Rev 4

Page 19

PA4

Probe value At 4mA or At 0V: (-1.0 to P20 bar / -14 to PSI / -10 to P20 kPA*10) pressure value measured by probe at 4mA or at 0V (related to PrM parameter) Referred to Pb5

P20

Probe value 20mA or At 5V: (PA4 to 50.0 bar / 725 psi / 500 kPA*10) pressure value measured by probe at 20mA or at 5V (related to PrM parameter) Referred to Pb5

Lower Pressure Limit for superheat regulation: (PA4 to P20 bar / psi / kPA*10) when suction pressure comes

LPL

down to LPL the regulation is performed with a LPL fixed value for pressure, when pressure comes back to LPL the normal pressure value is used. (related to PrM parameter)

MOP

LOP

Maximum Operating Pressure threshold: (PA4 to P20 bar / psi / kPA*10) if suction pressure exceeds maximum operating pressure value, device signals situation with MOP alarm. (related to PrM parameter)

Lowest Operating Pressure threshold: (PA4 to P20 bar / psi / kPA*10) If the suction pressure comes down to this value, a low pressure alarm is signaled with LOP alarm. (related to PrM parameter)

delta MOP-LOP: (0 to 100%) When a MOP alarm occurs, the valve will close of the dML percentage every

dML

cycle period until MOP alarm is active. When LOP occurs, the valve will open of the dML percentage every cycle period until LOP alarm is active.

MSH

LSH

Maximum Superheat alarm: (LSH to 144°F / LSH to 80.0°C) When the superheat exceeds this value, a high superheat alarm is signaled after interval SHd.

Lowest Superheat alarm: (0 to MSH °F / 0.0 to MSH °C) When the superheat goes down to this value, a low superheat alarm is signaled after interval SHd.

SHy Superheat alarm Hysteresis: (1 to 45°F / 0.1 to 25.5°C) Hysteresis for superheat alarm deactivation.

SHd

FrC

Superheat alarm activation delay: (0.0 to 42.0 min: resolution 10s) When a superheat alarm occurs, the time SHd have to pass before signaling the alarm.

Fast-recovery Constant: (0 to 100 s) permits to increase integral time when SH is below the setpoint. If FrC=0 fast recovery function is disabled.

DEFROST

dPA

dPb

dPE

defrost Probe A: (nP; P1; P2, P3, P4, P5) first probe used for defrost. If rPA = nP the regulation is performed with real value of dPb.

defrost Probe B: (nP; P1; P2, P3, P4, P5) second probe used for defrost. If rPB = nP the regulation is performed with real value of dPA.

defrost virtual probe percentage: (0 to 100%) it defines the percentage of the dPA respect to dPb. The value used to regulate room temperature is obtained by: value_for_defrost= (dPA*dPE + dPb*(100-dPE))/100.

tdF Defrost type: (EL - in) EL = electrical heater; in = hot gas.

EdF Defrost mode: (in) In= interval defrost activation with idf.

Srt

Heater setpoint during defrost: (-67 to 302°F; -55.0 to 150.0°C) if tdF=EL during the defrost the defrost relay perform an ON/OFF regulation with Srt as setpoint.

Hyr Differential for heater: (1°F to 45°F, 0.1°C to 25.5°C) the differential for heater

Time out for heater: 0 to 255 (min.) if the defrost probe temperature is bigger than Srt for all tod time the

tod

defrost ends although the defrost probe temperature is lower than dtE or dtS. It permits to reduce defrost duration.

dtP

Minimum temperature difference to start defrost: [1°F to 90°F] [0.1°C to 50.0°C] if the difference between the two defrost probes stays lower than dtP for all ddP time the defrost is activated.

ddP Delay before starting defrost (related to dtP): (0 to 60 min) delay related to dtP.

Table 8-1 - XM670 to XM679 Parameters List

Auxiliary Output Parameters List • 13

Page 20

d2P

dtE

dtS

Defrost with two probes: (n - Y) n= only the dPA probe is used to defrost management; Y= defrost is managed with dPA probe and dPb probe. Defrost can performed only if both probe value are lower than dtE for dPA probe and dtS for dPb probe.

Defrost termination temperature (Probe A): (-67 to 122°F; -55.0 to 50.0°C) (Enabled only when the evaporator probe is present) sets the temperature measured by the evaporator probe dPA which causes the end of defrost.

Defrost termination temperature (Probe B): (-67 to 122°F; -55.0 to 50.0°C) (Enabled only when the evaporator probe is present) sets the temperature measured by the evaporator probe dPb which causes the end of defrost.

IdF

MdF

dSd

dFd

dAd

Interval between defrosts: (0 to 120h) Determines the time interval between the beginning of two defrost cycles.

Maximum duration of defrost: (0 to 255 min) When dPA and dPb aren't present, it sets the defrost duration, otherwise it sets the maximum duration for defrost.

Start defrost delay: (0 to 255 min) This is useful when different defrost start times are necessary to avoid overloading the plant.

Display during defrost: rt = real temperature; it = temperature reading at the defrost start; Set = setpoint;  dEF = “dEF” label.

Defrost display time out: (0 to 255 min) Sets the maximum time between the end of defrost and the restarting of the real room temperature display.

Drain down time: (0 to 255 min.) time interval between reaching defrost termination temperature and the

Fdt

restoring of the control's normal operation. This time allows the evaporator to eliminate water drops that might have formed due to defrost.

dPo First defrost after start-up: y = Immediately; n = after the IdF time

dAF

Defrost delay after continuous cycle: (0 to 23.5h) time interval between the end of the fast freezing cycle and the following defrost related to it.

FAN

FPA

FPB

Fan probe A: (nP; P1; P2, P3, P4, P5) first probe used for fan. If FPA = nP the regulation is performed with real value of FPB.

Fan probe B: (nP; P1; P2, P3, P4, P5) second probe used for defrost. If FPB = nP the regulation is performed with real value of FPB.

FPE

Fan virtual probe percentage: (0 to 100%) Defines the percentage of the FPA with respect to FPb. The value used to regulate room temperature is obtained by: value_for_defrost= (FPA*FPE + FPb*(100-FPE))/100.

Fan operating mode: C-n = running with the solenoid valve, OFF during the defrost; C-y = running with the

FnC

solenoid valve, ON during the defrost; O-n = continuous mode, OFF during the defrost; O-y = continuous mode, ON during the defrost.

Fnd Fan delay after defrost: (0 to 255 min) The time interval between the defrost end and evaporator fans start.

Temperature differential avoiding short cycles of fans (0°F to 90°F; 0.0°C to 50.0°C) If the difference of

FCt

temperature between the evaporator and the room probes is more than the value of the Fct parameter, the fans are switched on.

FSt

Table 8-1 - XM670 to XM679 Parameters List

14 • XM679K I&O Manual 026-1218 Rev 4

Fan stop temperature: (-58 to 230°F; -50 to 110°C) setting of temperature, detected by evaporator probe, above which the fan is always OFF.

Page 21

FHy

Differential to restart fan: (1°F to 45°F) (0.1°C to 25.5°C) when stopped, fan restarts when fan probe reaches FSt-FHy temperature.

Fod Fan activation time after defrost: (0 to 255 min.) it forces fan activation for indicated time.

Fan ON time: (0 to 15 min) with Fnc = C_n or C_y, (fan activated in parallel with compressor). Sets the

Fon

evaporator fan ON cycling time when the compressor is off. With Fon =0 and FoF =0 the fan are always off, with Fon=0 and FoF =0 the fan are always off.

Fan OFF time: (0 to 15 min) with Fnc = C_n or C_y, (fan activated in parallel with compressor). Sets the

FoF

evaporator fan off cycling time when the compressor is off. With Fon =0 and FoF =0 the fans are always off, with Fon=0 and FoF =0 the fans are always off.

MODULATING OUTPUT (AnOUT) If Present

Kind of regulation with PWM output: (UAL - rEG - AC) it selects the functioning for the PWM output if

trA

CoM is not equal to OA7. UAL= the output is at FSA value; rEG= the output is regulated with fan algorithm described in fan section; AC= anti-sweat heaters control (require the XWEB5000 system).

SOA Fixed value for analog output: (0 to 100%) value for the output if trA = UAL.

SdP

ASr

Default value for Dew point: (-67 to 122°F; -55.0 to 50.0°C) default value of dew point used when there is no supervising system (XWEB5000). Used only when trA=AC.

Dew-point offset (trA=AC) / Differential for modulating fan regulation (trA=rEG): (-45°F to 45°F) (-25.5°C to 25.5°C).

PbA Differential for anti-sweat heaters: (1°F to 45°F) (0.1°C to 25.5°C)

AMi Minimum value for analog output: (0 to AMA)

AMA Maximum value for analog output: (Ami to 100)

AMt

Anti-sweat heaters cycle period (trA=AC)/ Time with fan at maximum speed (trA=rEG): (0 to 255 s) when the fan starts, during this time the fan is at maximum speed.

ALARMS

rAL

ALC

ALU

ALL

AHy

Probe for temperature alarm: (nP - P1 - P2 - P3 - P4 - P5 - tEr) Selects the probe used to signal alarm temperature.

Temperature alarm configuration: rE = High and Low alarms related to Setpoint; Ab = High and low alarms related to the absolute temperature.

High temperature alarm setting: (ALC= rE, 0 to 90°F or 50°C / ALC= Ab, ALL to 302°F or 150°C) when this temperature is reached and after the ALd delay time the HA alarm is enabled.

Low temperature alarm setting: (ALC = rE, 0 to 90°F or 50 °C / ALC = Ab, - 67°F or - 55°C to ALU) when this temperature is reached and after the ALd delay time, the LA alarm is enabled.

Differential for temperature alarm: (1°F to 45°F / 0.1°C to 25.5°C) Intervention differential for recovery of temperature alarm.

ALd

dLU

dLL

Table 8-1 - XM670 to XM679 Parameters List

Auxiliary Output Parameters List • 15

Temperature alarm delay: (0 to 255 min) The time interval between the detection of an alarm condition and the corresponding alarm signaling.

High temperature alarm (defrost probe): (ALC= rE, 0 to 90°F or 50°C / ALC= Ab, ALL to 302°F or 150°C) When this temperature is reached and after the ddA delay time, the HAd alarm is enabled.

Low temperature alarm (defrost probe): (ALC = rE, 0 to 90°F or 50 ° C / ALC = Ab, - 67°F or - 55°C to ALU) when this temperature is reached and after the ALd delay time, the LAd alarm is enabled.

Page 22

dAH

Differential for temperature alarm (defrost probe): (1°F to 45°F / 0.1°C to 25.5°C) Intervention differential for recovery of temperature alarm.

ddA

FLU

FLL

FAH

FAd

dAO

EdA

Temperature alarm delay (defrost probe): (0 to 255 min) time interval between the detection of an alarm condition and the corresponding alarm signaling.

High temperature alarm (defrost probe): (ALC= rE, 0 to 90°F or 50°C / ALC= Ab, ALL to 302°F or 150°C) when this temperature is reached and after the FAd delay time the HAF alarm is enabled.

Low temperature alarm (defrost probe): (ALC = rE, 0 to 90°F or 50°C / ALC = Ab, - 67°F or - 55°C to ALU) when this temperature is reached and after the FAd delay time, the LAF alarm is enabled.

Differential for temperature alarm (defrost probe): (1°F to 45°F / 0.1°C to 25.5°C) Intervention differential for recovery of temperature alarm.

Temperature alarm delay (defrost probe): (0 to 255 min) time interval between the detection of an alarm condition and the corresponding alarm signaling.

Delay of temperature alarm at start-up: (0min to 23h 50min) The time interval between the detection of the temperature alarm condition after the device power on and the alarm signaling.

Alarm delay at the end of defrost: (0 to 255 min) Time interval between the detection of the temperature alarm condition at the end of defrost and the alarm signaling.

dot Temperature alarm exclusion after door open

Sti

Std

Stop regulation interval (Only XM679): (0.0 to 24.0 hours: tens of minutes) After regulating continuously for Sti time, the valve closes for Std time to prevent ice from forming.

Stop duration (Only XM679): (0 to 60 min.) Defines the stop regulation time after Sti. During this stop display shows StP message.

Sixth relay configuration (CPr-dEF-Fan-ALr-LiG-AUS-db-OnF): CPr= relay works as a compressor or

OA6

solenoid valve relay; dEF= relay works as defrost relay; Fan= relay works as a Fan relay; ALr= activation with alarm conditions; LiG= light activation; AUS= auxiliary relay, it can be switched ON/OFF also by key; db= deadband regulation (not compatible with CrE = y); OnF= ON/OFF functioning.

OPTIONAL OUTPUT (AnOUT) If Present

Modulating output configuration (if CoM=0A7): (CPr - dEF - FAn - ALr - LiG - AUS - db) it selects the

OA7

functioning of the modulating output in case of CoM=OA7: CPr= compressor; dEF= defrost; FAn= Fan; Alr= Alarm; LiG= Light; AUS= auxiliary; db= neutral zone (not available with CrE=Y)

Type of functioning modulating output:

CoM

For models with PWM / O.C. output -> PM5= PWM 50Hz; PM6= PWM 60Hz; OA7= two state, it can be used as an open collector output



For models with 4 to 20mA / 0 to 10V output -> Cur= 4 to 20mA current output; tEn= 0 to 10V voltage output

AOP Alarm relay polarity: cL= normally closed; oP= normally opened

iAU

Auxiliary output is unrelated to ON/OFF device status: n= if the device is switched off also the auxiliary output is switched off; Y= the auxiliary output state is unrelated to the ON/OFF device status.

DIGITAL INPUTS

i1P

Table 8-1 - XM670 to XM679 Parameters List

Digital input 1 polarity: (cL - oP) CL: the digital input is activated by closing the contact; OP: the digital input is activated by opening the contact.



16 • XM679K I&O Manual 026-1218 Rev 4

Page 23

i1F

d1d

Digital input 1 function: (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 device; Htr= change type of action; FHU= not used; ES= activate energy saving; Hdy= activate holiday function

Time interval/delay for digital input alarm: (0 to 255 min.) Time interval to calculate the number of the pressure switch activation when i1F=PAL. If I1F=EAL or bAL (external alarms), “d1d” parameter defines the time delay between the detection and the successive signaling of the alarm. If i1F=dor this is the delay to activate door open alarm.

i2P

i2F

d2d

i3P

i3F

d3d

nPS

Digital input 2 polarity: (cL - oP) CL: the digital input is activated by closing the contact; OP: the digital input is activated by opening the contact.

Digital input 2 function: (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 device; Htr= change type of action; FHU= not used; ES= activate energy saving; Hdy= activate holiday function

Time interval/delay for digital input alarm: (0 to 255 min.) Time interval to calculate the number of the pressure switch activation when i2F=PAL. If I2F=EAL or bAL (external alarms), “d2d”parameter defines the time delay between the detection and the successive signaling of the alarm. If i2F=dor this is the delay to activate door open alarm.

Digital input 3 polarity: (cL - oP) CL: the digital input is activated by closing the contact; OP: the digital input is activated by opening the contact.

Digital input 3 function: (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 device; Htr= change type of action; FHU= not used; ES= activate energy saving; Hdy= activate holiday function

Time interval/delay for digital input alarm: (0 to 255 min.) Time interval to calculate the number of the pressure switch activation when i3F=PAL. If i3F=EAL or bAL (external alarms), “d3d” parameter defines the time delay between the detection and the successive signaling of the alarm. If i3F=dor this is the delay to activate door open alarm.

Pressure switch number: (0 to 15) Number of activation of the pressure switch, during the “d#d” interval, before signaling the alarm event (I2F= PAL). If the nPS activation in the did time is reached, switch off and on the device to restart normal regulation.

odc

Compressor and fan status when open door: no = normal; Fan = Fan OFF; CPr = Compressor OFF; F_C = Compressor and fan OFF.

rrd Outputs restart after door open alarm.

ENERGY SAVING

ESP Energy saving probe selection: (nP - P1 - P2 - P3 - P4 - P5 - tEr).

HES

PEL

Temperature increase during the Energy Saving cycle: (-54 to 54°F / -30 to 30°C) sets the increasing value of the setpoint during the Energy Saving cycle.

Energy saving activation when light is switched off: (n to Y) n= function disabled; Y= energy saving is activated when the light is switched off and vice versa.

LAN MANAGEMENT

LMd

Table 8-1 - XM670 to XM679 Parameters List

Auxiliary Output Parameters List • 17

Defrost synchronization: y= the section send a command to start defrost to other controllers, n= the section don't send a global defrost command

Page 24

dEM Type of end defrost: n= the of the LAN defrost are independent; y= the end of the defrost are synchronized

LSP

LdS

LOF

LLi

LAU

LES

LSd

LPP

L.A.N. set-point synchronization: y= the section set-point, when modified, is updated to the same value on all the other sections; n= the set-point value is modified only in the local section

L.A.N. display synchronization: y= the value displayed by the section is sent to all the other sections; n= the set-point value is modified only in the local section

L.A.N. On/Off synchronization this parameter states if the On/Off command of the section will act on all the other ones too: y= the On/Off command is sent to all the other sections; n= the On/Off command acts only in the local section

L.A.N. light synchronization this parameter states if the light command of the section will act on all the other ones too: y= the light command is sent to all the other sections; n= the light command acts only in the local section

L.A.N. AUX output synchronization this parameter states if the AUX command of the section will act on all the other ones too: y= the light command is sent to all the other sections; n= the light command acts only in the local section

L.A.N. energy saving synchronization this parameter states if the energy saving command of the section will act on all the other ones too: y= the Energy Saving command is sent to all the other sections; n= the Energy Saving command acts only in the local section

Remote probe display: this parameter states if the section has to display the local probe value or the value coming from another section: y= the displayed value is the one coming from another section (which has parameter LdS = y); n= the displayed value is the local probe one.

Remote pressure probe: n= the value of pressure probe is read from local probe; Y= the value of pressure probe is sent via LAN.

StM

Solenoid activation via LAN: n= not used; Y= a generic cooling requests from LAN activate the solenoid valve connected to compressor relay.

PROBE CONFIGURATION

P1C Probe 1 configuration: (nP - Ptc - ntc - PtM) nP= not present; PtC= Ptc; ntc= Ptc; PtM= Pt1000

Ot Probe 1 calibration: (-21 to 21°F/ -12.0 to 12.0°C) allows to adjust possible offset of the thermostat probe.

P2C Probe 2 configuration: (nP - Ptc - ntc - PtM) nP= not present; PtC= Ptc; ntc= Ptc; PtM= Pt1000

OE Probe 2 calibration: (-21 to 21°F/ -12.0 to 12.0°C) allows to adjust possible offsets of the evaporator probe.

P3C Probe 3 configuration: (nP - Ptc - ntc - PtM) nP= not present; PtC= Ptc; ntc= Ptc; PtM= Pt1000

o3 Probe 3 calibration: (-21 to 21°F/ -12.0 to 12.0°C) allows to adjust possible offset of the probe 3.

P4C Probe 4 configuration: (nP - Ptc - ntc - PtM) nP= not present; PtC= Ptc; ntc= Ptc; PtM= Pt1000

o4 Probe 4 calibration: (-21 to 21°F/ -12.0 to 12.0°C) allows to adjust possible offset of the probe 4.

P5C

P6C

Probe 5 configuration: (nP - Ptc - ntc - PtM - 420 - 5Vr) nP= not present; PtM= Pt1000; 420= 4 to 20mA; 5Vr= 0 to 5V ratiometric; (Only XM679)

Probe 5 calibration: (-21 to 21°F/ -12.0 to 12.0°C) allows to adjust possible offset of the probe 5.  (Only XM679)

Probe 6 configuration: (nP - Ptc - ntc - PtM) nP= not present; PtC= Ptc; ntc= Ptc; PtM= Pt1000;  (Only XM679)

Probe 6 calibration: (-21 to 21°F/ -12.0 to 12.0°C) allows to adjust possible offset of the probe 6.  (Only XM679)

Table 8-1 - XM670 to XM679 Parameters List

18 • XM679K I&O Manual 026-1218 Rev 4

Page 25

SERVICE - READ ONLY

CLt Cooling time percentage: it shows the effective cooling time calculated by XM600 during regulation

tMd Time to next defrost: it shows time before the next defrost if interval defrost is selected

LSn L.A.N. section number (1 to 5) Shows the number of sections available in the L.A.N.

Lan

Adr

L.A.N. serial address (1 to LSn) Identifies the device address inside local network of multiplexed cabinet controller.

RS485 serial address (1 to 247): Identifies the device address when connected to a MODBUS compatible monitoring system.

Rel Release software: (read only) Software version of the microprocessor.

Ptb Parameter table: (read only) it shows the original code of the dIXEL parameter map.

Pr2 Access to the protected parameter list (read only)

Table 8-1 - XM670 to XM679 Parameters List

Auxiliary Output Parameters List • 19

Page 26

9 Digital Inputs

The XM600 series of controllers can support up to three (3) configurable digital inputs that are free of voltage contact (depending on the models). They are configurable via i#F parameter.

1. The terminals [30] to [33] are free of voltage.

2. Use shielded cable for distances higher than one meter.

For each input, the following has to be configured: the polarity of activation, the function of the input, and the delay of signaling. The parameters to perform this configuration are i1P, i1F, i1d respectively for polarity, functioning, and delay.

9.4. Door Switch Input (dor)

This input signals the door status and the corresponding relay output status through the odc parameter: 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 d#d, the door alarm is enabled, the display shows the message dA, and the regulation restarts after rrd time. The alarm stops as soon as the external digital input is disabled again. With the door open, the high and low temperature alarms are disabled.

9.5. Start Defrost (dEF)

A defrost will start if the right conditions exist. After the defrost is finished, normal regulation will restart only if the digital input is disabled; otherwise, the controller will wait until the MdF safety time is expired.

9.1. Generic Alarm (EAL)

As soon as the digital input is activated, the controller will wait for the did time delay before signaling the EAL alarm message. The outputs status don’t change. The alarm will stop as soon as the digital input is deactivated.

9.2. Serious Alarm Mode (bAL)

When the digital input is activated, the controller will wait for the did time delay before signaling the bAL alarm message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is  deactivated.

9.3. Pressure Switch (PAL)

If the pressure switch has reached the number of activation of the nPS parameter during the interval time set by the d#d parameter, the CA pressure alarm message will be displayed. The compressor and the regulation are stopped. When the digital input is ON the compressor is always OFF.

in the d#d time is reached, switch the controller OFF and ON to restart normal regulation.

If the nPS activation

9.6. Relay Aux Actuation (AUS)

This function enables the auxiliary relay to be turned ON and OFF by using the digital input as external switch.

9.7. Relay Light Actuation (LiG)

This function enables the light relay to be turned ON and OFF by using the digital input as external switch.

9.8. Remote ON/OFF (OnF)

This function switches the controller ON and OFF.

9.9. Kind of Action (Htr)

This function enables the change in the kind of regulation: from cooling to heating and vice versa.

20 • XM679K I&O Manual 026-1218 Rev 4

Page 27

9.10.FHU (Not Used)

This function enables the change in the kind of regulation: from cooling to heating and vice versa.

9.11.Energy Saving Input (ES)

The Energy Saving function allows you to change the setpoint value as the result of the SET+ HES (parameter) sum. This function is enabled until the digital input is activated.

9.12.Configurable Input Holiday Function (HDY)

In Holiday function, the Energy Saving and defrost cycles follow holiday times (Sd1…Sd6).

10 Installation and

Mounting

The XM679 can operate without any user interface, but normal application is with the CX660 keyboard. The CX660 keyboard should be mounted on a vertical panel, in a 29 mm x 71 mm hole, and secured using the special bracket supplied.

9.13.Digital Inputs Polarity

The digital inputs polarity depends on the I#P parameters: CL (the digital input is activated by closing the contact) and OP (the digital input is activated by opening the contact).

Figure 10-1 - Installation and Mounting of CX660 Keyboard

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 10-2 - CX660 Keyboard Dimensions

FHU (Not Used) Installation and Mounting • 21

Page 28

11 Electrical

13 How to Use the

Connections

The XM670/XM679 controllers come with a screw terminal block to connect cables with a cross section

up to 1.6 mm RS485, the LAN, the probes, the digital inputs, and the keyboard. Other inputs, power supply, and relay connections are provided with a Faston connection (5.0 mm). Heat-resistant cables have to be used. Before connecting cables, verify that the power supply complies with the controller’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.

for all the low voltage connections: the

NOTE: Maximum current allowed for all the load is 16A.

11.1.Probe Connections

The probes should be mounted with the bulb upwards to prevent damages due to casual liquid infiltration. It is recommended that the thermostat probe be placed 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.

12 RS485 Serial Line

Each XM670/XM679 controller has a direct RS485 connection that enables the controller to be linked to a network line that is MODBUS-RTU compatible with all monitoring systems.

Hot Key

XM controllers can download or upload the parameter list from its own non-volatile internal memory to the Hot Key and vice-versa through a 5-pin connector. The Hot Key will not change the Adr.

13.1.Download (From the Hotkey to the Device)

1. Turn OFF the controller by pressing the on/off

button for five (5) seconds. OFF will display.

Insert the Hot Key into the 5-pin connector labeled HOT-KEY, and then turn the controller back ON by pressing the on/off button again for five (5) seconds. The normal temperature value will display to indicate the controller is ON.

2. The parameter list of the Hot Key is downloaded

into the controller memory automatically and doL will display. After 10 seconds, the controller will start working with the new parameters.

3. End will display at the end of the data transfer

phase if the controller is programmed correctly. 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 and the controller models are different.

22 • XM679K I&O Manual 026-1218 Rev 4

Page 29

13.2.Upload (From the Device to the Hotkey)

1. When the XM controller is ON, insert the Hot

Key into the 5-pin connector labeled HOT-KEY.

2. Press and release the up arrow button.

3. The upload will begin, and UPL will blink on the

display. End will display at the end of the data transfer phase if a successful upload has occurred. Err will display if there is an error or failure in programming.

• End = correct programming.

• Err = failed programming. In this case, press the SET key if you want to restart the programming again or remove the unprogrammed Hot Key.

4. Remove the Hot Key.

Note: The upload procedure will overwrite everything previously uploaded from the last Hot Key upload.

Upload (From the Device to the Hotkey) How to Use the Hot Key • 23

Page 30

14 Alarm Signals

Message Cause Outputs

KEYBOARD

No display: the keyboard is trying to

nod

PON Keyboard enabled Outputs unchanged

POF Keyboard locked Outputs unchanged

rst Alarm reset Alarm relay reset

nOP, nP, nA Probe not present Compressor output according to parameter Con and COF

noL

P1 First probe failure Compressor output according to parameters Con and COF

P2 Second probe failure Defrost end is timed

P3 Third probe failure Outputs unchanged

P4 Fourth probe failure Outputs unchanged

P5 Fifth probe failure Outputs unchanged

P6 Sixth probe failure Outputs unchanged

PPF

CPF

HA Maximum temperature alarm Outputs unchanged

LA Minimum temperature alarm Outputs unchanged

HAd Defrost high temperature Outputs unchanged

LAd Defrost low temperature Outputs unchanged

FAd Defrost low temperature Outputs unchanged

HAF Fan high temperature Outputs unchanged

LAF Fan high temperature Outputs unchanged

StP

PAL Lock due to pressure switch All outputs OFF

dA Door open Compressor and fans restarts according to rrd and odc

EA External alarm Outputs unchanged

CA Serious external alarm (i1F=bAL) All outputs OFF

LOP Minimum operating pressure reached According to dML

MOP Maximum operating pressure reached According to dML

work with another board that is not working or not present.

They keyboard is not able to  communicate with the XM679K.

ALARM FROM PROBE INPUT

PPF is displayed by slaves of pressure that don’t receive the value of pressure.

CPF is displayed when the remote probe 4 is not working,

TEMPERATURE ALARM

Stop due to regulation pauses  (Sti and Std parameters)

DIGITAL INPUT ALARM

ELECTRONIC VALVE ALARM

Press the UP arrow for three (3) seconds. Enter the SEC menu, and select LOC entry.

Verify the connection. Call the service.

The percentage of the valve opening is fixed at PEO value.

Compressor and valve OFF

Table 14-1 - Alarm Signals

24 • XM679K I&O Manual 026-1218 Rev 4

Page 31

LSH Minimum superheat alarm Valve closed

MSH Maximum superheat alarm Outputs unchanged

HSH Minimum superheat alarm Outputs changed.

CLOCK ALARM

rtC Clock settings lost.

Defrost will be performed with ldF until the settings of  RTC has been restored.

rtF Clock damaged. Defrost will be performed with ldF.

OTHERS

EE EEPROM failure All outputs OFF

Err

End

Table 14-1 - Alarm Signals (Continued) (Continued)

Error with upload/download  parameters.

Parameters have been correctly  transferred.

Repeat the operation.

Outputs changed.

Upload (From the Device to the Hotkey) Alarm Signals • 25

Page 32

14.1.EE Alarm

The controllers are provided with an internal check for data integrity. Alarm EE flashes when a failure in the memory data occurs. In such cases, the alarm output is enabled.

14.2.Alarm Recovery

Probe alarms, P1 (probe1 faulty), P2, P3, P4, P5, and P6 automatically stop 10 seconds after the probe

restarts normal operation. Check connections before replacing the probe. Temperature alarms, HA, LA, HAd, LAd, HAF, and LAF automatically stop as soon as the thermostat temperature returns to normal values or when the defrost starts. External alarms EAL and bAL stop as soon as the external digital input is disabled.

26 • XM679K I&O Manual 026-1218 Rev 4

Page 33

15 Technical Data

CX660 KEYBOARD

Housing Self-extinguishing ABS

Case:

Dimensions

Protection

Power Supply From XM600 power module

Display 3 digits, red LED, 14.2 mm H

Optional Output Buzzer

Case 8 DIN

Connections

Power Supply

Power Absorption 9VA max

Inputs Up to 6 NTC/PTC/Pt1000 probes

Digital Inputs Three (3) voltage-free

Relay Outputs

(Total current on loads MAX 16A)

See Section 16, UL Ratings.

Va lv e O u tp ut a.c. output up to 30W (Only XM679)

Optional Output (AnOUT) Depending on the model

Serial Output RS485 with MODBUS-RTU and LAN

Data Storing On the volatile memory (EEPROM)

Kind of Action 1B

Pollution Grade Normal

Software Class A

Operating Temperature 32 to 140°F (0 to 60°C)

Storage Temperature -13 to 140°F (-25°C to 60°C)

Relative Humidity 20 to 85% (no condensing)

Front: 35 mm x 77 mm Depth: 18 mm

Panel Mount: 29 mm x 71 mm panel cut-out

IP20

Frontal: IP65

POWER MODULES

Screw terminal block ≤ 1.6 mm2 heat-resistant wiring and 5.0 mm Faston

Depending on the model: 12VAC – 24VAC - 110VAC ± 10% - 230VAC ± 10% or 90 to 230VAC with switching power supply

PWM/ Open Collector outputs: PWM or 12VDC max 40mA

Analog Output: 4 to 20mA or 0 to 10V

Table 15-1- XM670/XM679 Specifications

Alarm Recovery Technical Data • 27

Page 34

NTC probe: -5

Measuring and Regulation Range

Resolution 0.1°C or 1°C or 1°F (selectable)

Accuracy (ambient tem 25°C)

Table 15-1- XM670/XM679 Specifications

perature

PTC probe: -67

Pt1000 probe: -14

±0.5 °C ±1 digit

8 to 230°F (-40 to 110°C)

to 302°F (-50 to 150°C)

8 to 212°F (-100 to 100°C)

16 UL Ratings

Ratings Terminal

Evaporator Fan:

120/240 V, 50/60 Hz, 1/4 HP, 30k cycles 125 V, 50/60 Hz, 1/3 HP, 6k cycles 250 V, 50/60 Hz, 1/2 HP, 30k cycles

Compressor: 120 V/240 V, D300 Pilot Duty, 30k cycles

Auxiliary (not populated in 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

Relay Outputs UL Ratings

Light:

120 V, 50/60 Hz, 5 A, General Purpose, 6k cycles,  120 VAC, 1000 W Tungsten, 6k cycles 240 VAC, 1400 W Tungsten, 6k cycles

Defrost: 120/240 V, 50/60 Hz, 10A, Resistive, 30k cycles 120/240 V, 50/60 Hz, C300, Pilot Duty, 30k cycles

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

Pulse Valve (not populated on XM66 series): 230 V, 30 Watt

Terminals 9 and 10

Terminals 11 and 12

Terminals 18 and 17

Terminals 16 and 15

Terminals 14 and 13

Terminals 1, 2 and 3

Terminals 4, 5 and 6

Table 16-1- XM670/XM679 UL Ratings

Temperature - Maximum ambient operatin

Pollution Degree - 2 (Normally only non-conductive pollution. However, a temporary conductivity caused by condensation may be expected.)

28 • XM679K I&O Manual 026-1218 Rev 4

g temperature 60°C

Page 35

17 Connections

17.1.E2 to XM Device Communication Recommendations

Baud Rate: 19.2K Baud (9600 baud is not recommended for E2 to XM device communications).

Cable Length: Belden 8761 or equivalent (1200ft or less).

I/O Net Biasing: Up to 25 XM6xx devices can be connected to each E2 COM2A, COM2B, COM4A, COM4B

and COM6 port. Contact Technical Service if you have more than 25 devices per COM segment.

17.1.1.Wiring Guidelines

DEVICE TYPE EMERSON

ANALOG TEMP SENSOR DIGITAL INPUT

RS-485 NETWORK BELDEN #8761 #22-2 SHIELDED

PRESSURE TRANSDUCER **BELDEN #8771 #22-3 SHIELDED

POWER, LOADS, AND VALVE

Table 17-1 - Wiring Guidelines

BELDEN #8761 #22-2 SHIELDED

Emerson P/N 035-0002

BELDEN #8641 #24-2 SHIELDED

Emerson P/N 135-8641

Emerson P/N 135-8771

**#8771 for alternate 600v rated wire use BELDEN #8618 16 AWG

Allows a maximum wire size of 14 AWG (2 mm

17.2.XM670 - Wiring Diagram

Figure 17-1 - XM670 - ALL Power Supply

E2 to XM Device Communication Recommendations Connections • 29

Page 36

17.3.XM679 - 230VAC Valves/Wiring Diagram

Figure 17-2 - XM679 - 230VAC Valves

Models at 115V

Supply: Terminals 7-8

Valve at 115V: Terminals 4-5

17.4.XM679 - 24VAC Valves/Wiring Diagram

Figure 17-3 - XM679 - 24VAC Valves

NOTE: The jumper labeled as JMP is located inside the case of the controller. The JMP jumper should be closed only when driving the 24VAC valve.

30 • XM679K I&O Manual 026-1218 Rev 4

Page 37

18 E2 MODBUS Network Wiring

LON

EARTH GROUND

AC1

Shield

24VAC

Keyboard

RS-232

AC2

OFF

LON

RS485-1B

+ 0v -

E2 STANDARD (3.XX and Below Version) POWER INTERFACE BOARD (PIB)

237-4810,Version1.00

E2PowerInterfaceBoard(P.I.B.)

Echelon Terminate Up

+ 0V RS485-2B

TX1 RX2RX1

JP4

JP5

JP6

JP1

JP2

JP3

REVERSE POLARITY OF +/-

ON RS485 CABLE FROM E2

BELDEN 8641 (TYPICAL)

earth ground connection

100 ohm

Watt

1/2

18 17 16 15 14 13

12 10 9 7811 321

19 20 22 23 24 25 26

35343332313029282721

RS485

modbus

Black

White

XM67X Series

Shield

MODBUS TERMINATION BLOCK 537-2711 150 ohm

18 17 16 15 14 13

12 10 9 7811 321

19 20 22 23 24 25 26 3938

3736

35343332313029282721

17 16 15 14 13

12 10 9 7811 321

19 20 22 23 24 25 26 3938

3736

35343332313029282721

RS485

modbus

Black

White

RS485

modbus

Black

White

BELDEN 8641 (TYPICAL)

Shield

XM67X SeriesXM67XK Series

Position the three jumpers to provide RS485 termination at the E2

TERMINATE NETWORK

+ 0v -

637-4890

White +

Black -

RS485-2A

+ 0V -

9600 Baud Only

*Note that for E2 Enhanced PIB

boards, the RS-485 connection

can be wired on COM 2, COM 4,

or COM 6 port.

MODBUS 485

• Connect the MODBUS Network to the RS485 Connector on the E2 PIB board (Belden 8641 recommended).

• Note to wire the RS485 +/- polarity at the E2 in the reverse

• Position the three termination jumpers to the UP (terminated) position to provide RS485 termination at the E2.

• 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 XM670 - XM679 device, wire the MODBUS cable to the RS485 +/- terminals and connect the MODBUS shield to the pin 38 terminal.

• Terminate the end of the MODBUS network at the last XM670 - XM679 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.

of the XM670 - XM679 devices.

Figure 18-1 - XM670 - XM679 to E2 MODBUS Network Wiring

CAUTION! For the XR, XM, and XEV series of controllers, the shield wire must not come into contact with any other wire or ground source. If contact with other wires or devices does occur, the 485 MODBUS network will malfunction or connected devices will be damaged. This applies to all installations where the

shield is tied to ground through a 100 ohm ½ Watt resistor.

Refer to Appendix A - Alternate MODBUS COM Wiring Method for E2, XR, XM, and XEV Devices.

(Technical Bulletin P/N 026-4148.)

XM679 - 24VAC Valves/Wiring Diagram E2 MODBUS Network Wiring • 31

Page 38

19 Wiring Layout for Sharing a Pressure

XM679

Address01

LAN

RS485

Black

White

MultiFlex XXX+

Address01

RS485

Black

White

Ground

RS485

Black

White

Ground

Black

White

Black

White

XM679

Address02

XM679

Address08

Circuit 1

XM679

Address09

XM679

Address10

XM679

Address16

Circuit 2

XM679

Address17

XM679

Address18

XM679

Address24

Circuit 3

XM679

AddressXX

XM679

AddressXX

XM679

AddressXX

Circuit X

MultiFlex XXX+

Address02

RS485

MultiFlex XXX+

Address03

RS485

MultiFlex XXX+

AddressXX

RS485

LAN

RS485

LAN

RS485

LAN

RS485

LAN

RS485

LAN

RS485

LAN

RS485

LAN

RS485

LAN

RS485

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Black

White

Ground

Black

White

Ground

Black

White

Ground

Termination

I/O Board

Transducer on a LAN

Figure 19-1 - Wiring Guidelines for Sharing a Pressure Transducer Across Multiple Units on the Same Circuit - XM679 Only

32 • XM679K I&O Manual 026-1218 Rev 4

Page 39

20 Pressure

Pb6 Superheat Probe

Pb6 Transducer 4 to 20mA

Pb6 Superheat Probe

38 39

19 20 21 22

38 39

Brown

+12v

gnd

+5v

Transducer Setup (XM679 Only)

4 to 20 mA for PP07, PP11, or similar models

Generic metric ratio 0 to 5V

Virtual Pressure: In this example of programming, the master device is the regulator with the pressure probe connected.

A working LAN connection is required (green LED

on all XM679K boards of the same LAN). Connect

lit and configure a pressure transducer only on one XM679K of the network. Afterwards, the value of the pressure read by the unique transducer connected will be available to each device connected to the same LAN.

Slave Master Slave

tPP = LAn LPP = n P5C = n

tPP = PP LPP = Y P5C = 4

(transd.)

Tpp = LAn LPP = n P5C = n

Slave device pressure:

rPP: Shows the value of pressure received by remote pressure probe connected to other XM600 device.

Master device

re:

pressu dPP = Sho

ws the value of pressure measured by pressure transducer. dP5 =

Sho ws t he temperature value measured

Slave device pressu

re:

rPP:

Shows the value of pressure received by remote pressure probe connected to other XM600 device.

by probe 5.

Check for error messages. Error message 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 correct.

Final Control From Superheat (SH) Reading Control Values:

• dPP = Shows the value of pressure measured by pressure transducer.

• dP6 = Shows the temperature measured by probe 6. Corresponds to the outlet temperature of gas of the evaporator.

• SH = S hows the actual super he at value. It must have a consistent value for difference between the values dP6 and dP5. If displaying nA, err or nd, the value is not calculable at the moment of the reading.

Press the arrow keys to access menu readings for pressure.

Once set up, check these readings:

XM679 - 24VAC Valves/Wiring Diagram Pressure Transducer Setup (XM679 Only) • 33

Page 40

20.1.Keyboard Display CX660

If the LAN is well connected, the green LED will be ON. If the green LED blinks, then the connection is wrongly configured. The maximum distance allowed is 30m.

1. Terminals -34 and +35

2. Use twisted shielded cable AWG 18 or less in case of long distance.

3. Keep at a maximum distance of 30m.

The XM679 board can also operate without a 

keyboard.

20.2.Synchronized Defrost

The synchronized defrost (also called master-slave functioning) allows the user to manage multiple  defrost from different boards connec LAN connection. In this way, the boards can perform simultaneous defrosts with the possibility to end them in a synchronized way.

Follow the next steps to create a LAN connection,

h is a necessary condition to perform 

whic synchronized defrost.

1. Connect a shielded cable between terminals -38 and +39 for a maximum of 8 sections.

2. The Adr parameter identifies each electronic board. Address duplication is not permitted. In this case, the synchronized defrost and the communication with the monitoring system is not guaranteed. (The Adr is also the MODBUS address). For example, a correct configuration would be:

ted through the

20.3.Sensors for Superheat Control

Temperature probe: Pb6 terminals [19]-[20] without any polarity.

Select the kind of sensor with P6C parameter.

Pressure transducer: Pb5

minals:

ter [21] = input of the signal [22] = Power Supply for 4

o 20 mA transducer [20] = GND [23] = +5Vdc power su

pply for ratiometric

pressure transducer

Select the configuration of the transducer with  parameter P5C.

20.4.Analog Output

• Selectable between 4 to 2mA and 0 to 10Vdc.

• Use CABCJ15 to  perform the  connections.

The analog output is located near the terminal [39] on a 2-pin connector. The output can be used to control anti-sweat heaters through a chopped phase controller XRPW500 (500 watt) or family XVD or XVK.

Figure 20-1 - Synchronized Defrost

34 • XM679K I&O Manual 026-1218 Rev 4

Page 41

20.5.RS485 Net Monitoring

Shielded Serial Cable

LAN LAN

Shielded Serial Cable

Temperatures

1. Terminals -36 and +37

2. Use Belden cable #8761 or #8641.

3. Keep at a maximum distance of approximately 1Km.

4. Don’t connect the shield to the earth or to GND terminals of the device. Avoid accidental contact by using insulating tape.

20.5.1.RS485 Connection

Sharing a single pressure transducer across multiple controllers on a LAN:

Figure 20-2 - Sharing a Pressure Transducer Between Devices on LAN

CAUTION! Do not connect the RS485 cable to all the instruments that are already connected on the LAN - only connect the RS485 to the

master device of the LAN.

Set the value of Adr parameter, then press SET to confirm the parameter.

Press the two keys together to exit from the menu or wait for about 10 seconds.

20.6.How to Enable a Pressure Probe to Share Across the LAN

1. Enter the Pr 1 l ev el . F ollo w t he st ep s i n Section 3.7.,

How to Enter the Parameters List PR1.

2. Select Pr2 parameter and press the SET key.

3. The PAS flashing message will display, followed shortly by “0 --” with a flashing zero.

4. Use the UP or DOWN button to input the security code in the flashing digit. Confirm the security code by pressing SET. The security code is 321.

5. If the security code is correct, the access to Pr2 is enabled 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 device and set it to Pressure Probe type. The slave devices P5C parameter will be set to nP (No Probe).

The parameter (Adr) al configurations on the RS485 network (besides the LAn); its value must be only from 1 to the total number of devices present on the RS485 and the LAN networks.

CAUTION! The same value of the Adr parameter in different controllers creates malfunctioning in the monitoring system or

problems on the synchronized defrosts.

Press for three (3) seconds, the rtC or other will be shown. The measurement unit blinks.

Press more than once the DOWN arrow to find the Adr parameter, then press SET.

RS485 Net Monitoring Temperatures Pressure Transducer Setup (XM679 Only) • 35

so defines the number of

NOTE: If pressure is not being shared across the LAN, each XM679 will need its own Pressure Transducer. Please reference Figure 18-1 and Figure 19-1 wiring diagrams.

Page 42

21 Wiring Connection to Site Supervisor

Figure 21-1 - Site Supervisor Wiring

36 • XM679K I&O Manual 026-1218 Rev 4

Page 43

22 ECT MODBUS

E2 PIB COM PORT ASSOCIATIONS

COM1

COM4

COM6

COM2

Serial Device RS485 COM Port (2 Connectors)

RS485 COM Card (2 Connectors)

Serial Device RS232 Port

POWER INTERFACE BOARD (PIB)

E2 Modem/Expansion COM Card Mounted Above PIB

Plug-In Modem Card

COM3

E2 Enclosure (Right Side)

RS485

RS232

XM670/ XM679

TERMINATED, BIASED (ALL 3 JUMPERS IN UP POSITION)

XM670/ XM679

E2 PIB COM PORT ASSOCIATIONS

COM1

Serial Device

RS232 Port

POWER INTERFACE BOARD

(PIB)

E2 Enclosure (Right Side)

COM2 COM6

COM4

Serial Device RS485 COM Ports

Plug-In Modem Card

COM3

Networking to E2s

Connecting a XM670 - XM679 controller to an E2 requires the E2 to be version 2.84 or above. Contact Emerson for upgrade information if the controller is a version before 2.84.

22.1.COM Port Associations

- E2 Versions 3.xx and Below

your E2 is equipped with an RS485 COM Card (P/N 637-4890) and configured in E2 General Services

(

, 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 threeterminal connector on the COM port you wish to assign as MODBUS. Reverse polarity of +/- on RS485 cable from E2 to the device.

Figure 22-2 - MODBUS Networking

22.2.COM Port Associations

Figure 22-1 - Location of E2 Com Ports - E2 PIB Board (E2 versions 3.xx and Below)

An E2 has up to three COM ports that can be assigned for MODBUS communication: COM2, an RS485 port on the E2 power interface board, and COM4 and COM6, which are optional ports requiring expansion cards.

connection of XM670 - XM679 units.

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

COM Port Associations - E2 Versions 3.xx and Below ECT MODBUS Networking to E2s • 37

COM4 is recommended for MODBUS

- E2 Versions 4.0 and Above

Figure 22-3 - Location of E2 Com Ports - E2 PIB Board (E2 versions 4.0 and Above)

Page 44

An E2 has three COM ports that can be assigned for

XM670/ XM679

TERMINATED, BIASED (ALL 3 JUMPERS IN UP POSITION)

XM670/ XM679

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 tab) to enable COM4 or COM6.

Connect the MODBUS network cable to the threeterminal connector on the COM port you wish to assign as MODBUS. Reverse polarity of +/- on RS485 cable from E2 to the device.

Figure 22-4 - MODBUS Networking

22.3.E2 Setup of Devices

22.3.1.Set Up Network Ports

Before setting up a device, the port on the E2 that has the MODBUS cable connected must be set up as a MODBUS port.

1. Log in to the E2 with Level 4 access.

2. Press

 followed by  - General

Controller Info.

Figure 22-5 - Serial Communications Manager Screen

4. This screen will have a “Connection” field for all COM ports on the E2. Highlight the COM port connection field that will be used for the device, and press  - LOOK UP. From the list of network types, select MODBUS.

5. Four fields will become visible underneath the COM port connection field, which pertain to the way the device communicates:

• Baud - Default setting is 19.2k. The baud rate setting should be set to match the baud rate of the XM670 - XM679 device (9600). (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).

3. Press

+ to open the Serial tab of the General

Controller Info setup screens:

6. Press

22.3.2.Add and Connect the Device

 to save changes and exit.

To enable communications between E2 and the XM670 - XM679 units, the devices must be added and addressed in E2.

1. Log in to the E2 with Level 4 access.

2. Press

38 • XM679K I&O Manual 026-1218 Rev 4

 - Connected I/O Boards

and Controllers.

Page 45

Figure 22-6 - Num Network Ctrls: NetSetup Screen

3. In the Num Network Ctrls: NetSetup screen, under

the ECT tab, enter the number of devices in the Quantity field. (Max shows the maximum number of devices allowed on the network.)

address set up through the front display, and press

 to select it. A window will open where you

can specify the address of the controller. If a network ID has already been selected, its name will be shown next to the network ID in this list. If the network ID you are trying to assign has already been used, you must set the address on this device to a different number that is not being used.

4. Press

5. Locate the units you added to the network list (press

 to return to the Network Setup menu,

then select

 - Network Summary.

 and  to scroll through the list). If desired,

enter a new name for each device in the Name field.

Figure 22-7 - Network Summary Screen

6. By default, each device in the network list has a board number of 0. To set the address and begin communication, choose the device and press . In the list of MODBUS devices, choose the address number corresponding to the XM670 - XM679

Figure 22-8 - List of MODBUS Devices

7. Repeat Steps 5 and 6 until each device has a name

and address.

8. When finished, press

Setup menu, then press (Figure 22-7). Locate the devices you set up, and

look at each device’s status in the Status 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 powered up, wired correctly, and has the proper network address, baud rate, and parity.

• No Port - No port is set up in the E2 Serial

Configuration 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 communication. Replace the device with a new one or a device that has the latest version of firmware on

 to return to the Network

 - Network Summary

E2 Setup of Devices ECT MODBUS Networking to E2s • 39

Page 46

it.

FROM LAST DEVICE AT END OF DAISY-CHAIN

SHIELD WIRE (CONNECT TO

OF DEVICE)

PIN 38

TO TERMINAL DEVICE

Figure 22-9 - Network Summary Screen

22.4.Wiring Types

Emerson specifies Belden #8761 shielded twisted pair cables for use as MODBUS wiring (or Belden #82761 and Belden #88761 for plenum installations).

For MODBUS network wiring of XM670 - XM679

ntrollers to E2, Belden #8641 (Emerson

P/N 135-8641) is the recommended wire type to use.

If the recommended cable is not available in your area

, be sure the wiring meets or exceeds the

following specs:



22.5.MODBUS Termination Blocks

Because the XM670/XM679 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 threepin connector. Wire the two signal wires to the outside terminals, and connect the shield to pin 38 of the device, keeping the exposed shield wire length as short as possible (3 inches ideal maximum length).

Figure 22-10 - MODBUS Termination Block (P/N 535-2711)

Shielded? Ye s

Conductor Type Twisted Pair

Gauge 18 - 24 AWG

Capacitance between signal wi

Capacitance between signal and shield

Maximum Length

Nominal Impedance 120W±50W

40 • XM679K I&O Manual 026-1218 Rev 4

res

31 pF/ft or less (9.45 m) or less

59 pF/ft or less (17.98 m) or less

4000 ft/18 to 22 AWG (1219.2 m) 2500 ft/24 AWG (762 m)

Page 47

23 Default Setting Values

Label Value Menu Description Range

SEt 2.0 - - - Setpoint LS - US

REGULATION

Hy 2.0 Pr1 Differential

Int 150 Pr1

CrE n Pr1 Continuous regulation activation n(0) – Y(1)

LS -30 Pr2 Minimum setpoint

US 20 Pr2 Maximum setpoint

odS 0 Pr1 Outputs activation delay at start up 0 to 255 (min.)

AC 0 Pr1 Anti-short cycle delay 0 to 60 (min.)

CCt 0.0 Pr2 Continuous cycle duration 0 to 24.0(144)(hour.10min)

CCS 2.0 Pr2 Continuous cycle setpoint

Con 15 Pr2 Compressor ON time with faulty probe 0 to 255 (min.)

CoF 30 Pr2 Compressor OFF time with faulty probe 0 to 255 (min.)

CF °C Pr2 Measurement unit: Celsius, Fahrenheit °C(0) - °F(1)

PrU rE Pr2 Pressure Mode rE(0) - Ab(1)

PMU bAr Pr2 Pressure measurement unit bAr(0) – PSI(1) - MPA(2)

PMd PrE Pr2

rES dE Pr2 Resolution (only °C): decimal, integer dE(0) - in(1)

Lod P1 Pr2 Local display: default display

rEd P1 Pr2 Remote display: default display

dLy 0 Pr1 Display delay 0 to 24.0(144) (Min.10s)

rPA P1 Pr1 Regulation probe A

rPb nP Pr1 Regulation probe B

rPE 100 Pr1

Fty 404 Pr1 Kind of gas

SSH 8.0 Pr1 Superheat setpoint

CyP 6 Pr1 Cycle Period 1 to 15 s

Integral time for room temperature regulation

Pressure displaying mode: temperature or pressure

nP(0) - P1(1) - P2(2) - P3(3) - P4(4) -

P5(5) - P6(6) – tEr(7) - dEF(8)

nP(0) - P1(1) - P2(2) - P3(3) - P4(4) -

P5(5) - P6(6) – tEr(7) - dEF(8)

nP(0) - P1(1) - P2(2) - P3(3) - P4(4) -

Virtual probe percentage (room temperature)

ELECTRONIC EXPANSION VALVE

R22(0) - 134(1) - 404(2) - 407(3) -

[1°F to 45°F]

[0.1°C to 25.5°C]

0 to 255 s

[-67°F to SET]

[-55.0°C to SET]

[SET to 302°F]

[SET to 150.0°C]

[-67°F to 302°F]

[-55.0°C to 150.0°C]

tEM(0) - PrE(1)

P5(5)

0 to 100 (100=rPA, 0=rPb)

410(4) - 507(5) - CO2(6)

[1°F to 45°F]

[0.1°C to 25.5°C]

Table 23-1 - Default Setting Values

MODBUS Termination Blocks Default Setting Values • 41

Page 48

Pb 5.0 Pr1

Proportional band for superheat regulator

rS 0.0 Pr1 Band Offset for superheat regulator

[1°F to 108 °F]

[0.1°C to 60.0 °C]

[-21°F to 21°F]

[-12.0°C to 12.0°C]

inC 120 Pr1 Integration time for superheat regulator 0 to 255 s

PEO 50 Pr1 Probe error opening percentage 0 to 100

PEd On Pr1

Probe error delay before stopping regulation

0 to 239 s - On(240)

OPE 85 Pr1 Start opening percentage 0 to 100

SFd 1.3 Pr1 Start function duration 0 to 42.0(252)(min.10sec)

OPd 100 Pr1 Opening percentage after defrost phase 0 to 100

Pdd 1.3 Pr1 Post defrost function duration 0 to 42.0(252)(min.10sec)

MnF 100 Pr1

Maximum opening percentage at normal functioning

0 to 100

dCL 0 Pr1 Delay before stopping valve regulation 0 to 255 s

Fot nu Pr1 Forced opening percentage 0 to 100 - “nu”(101)

tPP PP Pr2 Type of pressure transducer PP(0) - LAN(1)

BAR: [PrM = rEL] -1.0 to P20

[ P R M = A b s ] 0 . 0 t o P 2 0

PA4 -0.5 Pr2 Probe value at 4 mA or at 0V

PSI: [PrM = rEL] -14 to P20

[ P R M = A b s ] 0 t o P 2 0

dKP: [PrM = rEL] -10 to P20

[PRM = Abs] 0 to P20

BAR: [PrM = rEL] PA4 to 50.0

[ P r M = A b S ] P A 4 t o 5 0 . 0

P20 11.0 Pr2 Probe value at 20 mA or at 5V

PSI: [PrM = rEL] PA4 to 725

[ P r M = A b S ] P A 4 t o 7 2 5

dKP: [PrM = rEL] PA4 to 500

[PrM = AbS] PA4 to 500

LPL -0.5 Pr1

Lower pressure limit for superheat regulation

PA4 to P20

MOP 11.0 Pr1 Maximum operating pressure threshold LOP to P20

LOP -0.5 Pr1 Lowest operating pressure threshold PA 4 t o M OP

dML 30 Pr1 Delta MOP-LOP opening variation 0 to 100

MSH 80.0 Pr1 Maximum superheat alarm threshold

LSH 1.0 Pr1 Minimum superheat alarm threshold

SHy 0.5 Pr1 Superheat alarm hysteresis

[LSH to 144°F]

[LSH to 80.0°C]

[0 to MSH °F]

[0.0 to MSH °C]

[1°F to 45°F]

[0.1°C to 25.5°C]

SHd 3.0 Pr1 Superheat alarm activation delay 0 to 42.0(252)(min.10sec)

FrC 100 Pr1 Fast-recovery constant 0 to 100

DEFROST

dPA P2 Pr1 Defrost probe A

dPb nP Pr1 Defrost probe B

dPE 100 Pr1

Virtual probe percentage (defrost temperature)

nP(0) - P1(1) - P2(2) - P3(3) - P4(4) -

P5(5)

nP(0) - P1(1) - P2(2) - P3(3) - P4(4) -

P5(5)

0 to 100 (100=dPA, 0=dPb)

Table 23-1 - Default Setting Values (Continued)

42 • XM679K I&O Manual 026-1218 Rev 4

Page 49

tdF EL Pr1 Defrost type EL(0) - in(0)

EdF in Pr1 Defrost mode: Interval in(1)

Srt 150 Pr1 Heater setpoint during defrost

Hyr 2.0 Pr1 Differential for heater

[-67°F to 302°F]

[-55.0°C to 150°C]

[1°F to 45°F]

[0.1°C to 25.5°C]

tod 255 Pr1 Time out for heater 0 to 255 (min.)

dtP 0.1 Pr1

Minimum temperature difference to start defrost

[1°F to 90°F]

[0.1°C to 50.0°C]

ddP 60 Pr1 Delay before starting defrost 0 to 60 (min.)

d2P n Pr1 Defrost with two probes n(0) – Y(1)

dtE 8.0 Pr1

dtS 8.0 Pr1

Defrost termination temperature  (Probe A)

Defrost termination temperature  (Probe B)

[-67°F to 122°F]

[-55.0°C to 50.0°C]

[-67°F to 122°F]

[-55.0°C to 50.0°C]

idF 6 Pr1 Interval between defrosts 0 to 120 (hours)

MdF 30 Pr1 Defrost Maximum duration 0 to 255 (min.)

dSd 0 Pr1 Start defrost delay 0 to 255 (min.)

dFd it Pr1 Display during defrost rt(0) - it(1) - SEt(2) - dEF(3)

dAd 30 Pr1 Defrost display time out 0 to 255 (min.)

Fdt 0 Pr1 Drain down time 0 to 255 (min.)

dPo n Pr1 Defrost at start-up n(0) – Y(1)

dAF 0.0 Pr1 Defrost delay after continuous cycle 0 to 24.0(144)(hours.10min)

FAN

FPA P2 Pr1 Fan probe A

FPb nP Pr1 Fan probe B

FPE 100 Pr1

Virtual probe percentage  (fan management)

nP(0) - P1(1) - P2(2) - P3(3) - P4(4) -

P5(5)

nP(0) - P1(1) - P2(2) - P3(3) - P4(4) -

P5(5)

0 to 100 (100=FPA, 0=FPb)

FnC O-n Pr1 Fan operating mode C-n(0) - O-n(1) - C-y(2) - O-y(3)

Fnd 10 Pr1 Fan delay after defrost 0 to 255 (min.)

FCt 10 Pr1

Temperature differential to avoid short cycles of fans

FSt 2.0 Pr1 Fan stop temperature

FHy 1.0 Pr1 Fan stop differential

Fod 0 Pr1

Fan activation time after defrost  (without compressor)

[0°F to 90°F]

[0.0°C to 50.0°C]

[-67°F to 122°F]

[-55.0°C to 50.0°C]

[1°F to 45°F]

[0.1°C to 25.5°C]

0 to 255 (min.)

Fon 0 Pr1 Fan ON time 0to15 (min.)

FoF 0 Pr1 Fan OFF time 0to15 (min.)

trA UAL Pr2 Kind of regulation for modulating output UAL(0) - rEG(1) - AC(2)

SOA 80 Pr2 Fixed speed for fan AMi to AMA

SdP 30.0 Pr2 Default Dew Point value

[-67°F to 122°F]

[-55.0°C to 50.0°C]

Table 23-1 - Default Setting Values (Continued)

MODBUS Termination Blocks Default Setting Values • 43

Page 50

ASr 1.0 Pr2

Differential for fan / offset for anti sweat heater

PbA 5.0 Pr2 Proportional band for modulating output

[-45°F to 45°F]

[-25.5°C to 25.5°C]

[1°F to 45°F]

[0.1°C to 25.5°C]

AMi 0 Pr2 Minimum output for modulating output 0 to AMA

AMA 100 Pr2 Maximum output for modulating output AMi to 100

AMt 200 Pr2 Time with fan at maximum speed 0 to 255 s

ALARM

rAL P1 Pr1 Probe for temperature alarm

nP(0) - P1(1) - P2(2) - P3(3) - P4(4) -

P5(5) - tEr(6)

ALC Ab Pr1 Temperature alarm configuration rE(0) - Ab(1)

ALU 10 Pr1 High temperature alarm setting

ALL -30 Pr1 Low temperature alarm setting

AHy 1.0 Pr1 Differential for temperature alarm

[0°F to 90°F or ALL to 302°F]

[0.0°C to 50.0°C or ALL to 150.0°C]

[0°F to 90°F or -67°F to ALU°F]

[0.0°C to 50.0°C or -55.0°C to ALU]

[1°F to 45°F]

[0.1°C to 25.5°C]

ALd 15 Pr1 Temperature alarm delay 0 to 255 (min.)

dLU 150 Pr2

dLL -55 Pr2

dAH 1.0 Pr2

High temperature alarm setting  (defrost probe)

Low temperature alarm setting  (defrost probe)

Differential for temperature alarm (defrost probe)

[0°F to 90°F or dLL to 302°F]

[0.0°C to 50.0°C or dLL to 150.0°C]

[0°F to 90°F or -67°F to dLU°F]

[0.0°C to 50.0°C or -55.0°C to dLU]

[1°F to 45°F]

[0.1°C to 25.5°C]

ddA 15 Pr2 Temperature alarm delay (defrost probe) 0 to 255 (min.)

FLU 150 Pr2

FLL -55 Pr2

FAH 1.0 Pr2

High temperature alarm setting  (fan probe)

Low temperature alarm setting  (fan probe)

Differential for temperature alarm  (fan probe)

[0°F to 90°F or FLL to 302°F]

[0.0°C to 50.0°C or FLL to 150.0°C]

[0°F to 90°F or -67°F to FLU°F]

[0.0°C to 50.0°C or -55.0°C to FLU]

[1°F to 45°F]

[0.1°C to 25.5°C]

FAd 15 Pr2 Temperature alarm delay (fan probe) 0 to 255 (min.)

dAo 1.3 Pr1 Delay of temperature alarm at start-up 0 to 24.0(144)(hours.10min)

EdA 30 Pr1 Alarm delay at the end of defrost 0 to 255 min

dot 15 Pr1

Temperature alarm exclusion after door open

0 to 255 min

Sti nu Pr2 Stop regulation interval “nu”(0) to 24.0(144)(hour.10min)

Std 3 Pr2 Stop duration 1 to 255 min

oA6 AUS Pr2 Sixth relay output configuration

oA7 ALr Pr2

Modulating output configuration  (if CoM=oA7)

CoM Cur Pr2 Modulating output configuration

CPr(0) - dEF(1) - FAn(2) - ALr(3) -

LiG(4) - AUS(5) - db(6) - OnF(7)

CPr(0) - dEF(1) - FAn(2) - ALr(3) -

LiG(4) - AUS(5) - db(6) - OnF(7)

CUr(0) - tEn(1) - PM5(2) - PM6(3) -

oA7(4)

AOP cL Pr1 Alarm relay polarity OP(0) - CL(1)

iAU n Pr1

Auxiliary output independent from ON/ OFF state

n(0) – Y(1)

Table 23-1 - Default Setting Values (Continued)

44 • XM679K I&O Manual 026-1218 Rev 4

Page 51

DIGITAL INPUTS

i1P cL Pr1 Digital input 1 polarity OP(0) - CL(1)

EAL(0) - bAL(1) - PAL(2) - dor(3) -

i1F dor Pr1 Digital input 1 configuration

dEF(4) - AUS(5) -LiG(6) - OnF(7) -

Htr(8) - FHU(9) - ES(10) - Hdy(11)

d1d 15 Pr1 Digital input 1 activation delay 0 to 255 (min.)

i2P cL Pr1 Digital input 2 polarity OP(0) - CL(1)

EAL(0) - bAL(1) - PAL(2) - dor(3) -

i2F LiG Pr1 Digital input 2 configuration

dEF(4) - AUS(5) -LiG(6) - OnF(7) -

Htr(8) - FHU(9) - ES(10) - Hdy(11)

d2d 5 Pr1 Digital input 2 activation delay 0 to 255 (min.)

i3P cL Pr1 Digital input 3 polarity OP(0) - CL(1)

EAL(0) - bAL(1) - PAL(2) - dor(3) -

i3F ES Pr1 Digital input 3 configuration

dEF(4) - AUS(5) -LiG(6) - OnF(7) -

Htr(8) - FHU(9) - ES(10) - Hdy(11)

d3d 0 Pr1 Digital input 3 activation delay 0 to 255 (min.)

nPS 15 Pr1

OdC F-C Pr1

Number of pressure switch activation before lock

Compressor and fan status when open door

0 to 15

no(0) - FAn(1) - CPr(2) - F-C(3)

rrd 30 Pr1 Outputs restart after door open alarm. 0 to 255 (min.)

CLOCK

CbP Y Pr1 Clock presence n(0) – Y(1)

Hur - - - Pr1 Current hour - - -

Min - - - Pr1 Current minutes - - -

dAY - - - Pr1 Current day Sun(0) - SAt(6)

Hd1 nu Pr1 First weekly day Sun(0) - SAt(6) - nu(7)

Hd2 nu Pr1 Second weekly day Sun(0) - SAt(6) - nu(7)

Hd3 nu Pr1 Third weekly day Sun(0) - SAt(6) - nu(7)

ILE 0.0 Pr1

dLE 0.0 Pr1

ISE 0.0 Pr1

dSE 0.0 Pr1

HES 0.0 Pr1

Ld1 nu Pr1 Workdays First defrost start

Ld2 nu Pr1 Workdays Second defrost start

Ld3 nu Pr1 Workdays Third defrost start

Ld4 nu Pr1 Workdays Fourth defrost start

Energy saving cycle start during workdays

Energy saving cycle length during workdays

Energy saving cycle start during holidays

Energy saving cycle length during holidays

Temperature increasing during Energy Saving cycle

0 - 23.5(143)(hours.10min)

0 to 24.0(144)(hours.10min)

0 - 23.5(143)(hours.10min)

0 to 24.0(144)(hours.10min)

[-54°F to 54°F]

[-30.0°C to 30.0°C]

0.0 to 23.5(143) - nu(144) (hours.10min)

Ld1 to 23.5(143) - nu(144)

(hours.10min)

Ld2 to 23.5(143) - nu(144)

(hours.10min)

Ld3 to 23.5(143) - nu(144)

(hours.10min)

Table 23-1 - Default Setting Values (Continued)

MODBUS Termination Blocks Default Setting Values • 45

Page 52

Ld5 nu Pr1 Workdays Fifth defrost start

Ld6 nu Pr1 Workdays Sixth defrost start

Sd1 nu Pr1 Holidays First defrost start

Sd2 nu Pr1 Holidays Second defrost start

Sd3 nu Pr1 Holidays Third defrost start

Sd4 nu Pr1 Holidays Fourth defrost start

Sd5 nu Pr1 Holidays Fifth defrost start

Sd6 nu Pr1 Holidays Sixth defrost start

Ld4 to 23.5(143) - nu(144)

(hours.10min)

Ld5 to 23.5(143) - nu(144)

(hours.10min)

0.0 to 23.5(143) - nu(144) (hours.10min)

Sd1 to 23.5(143) - nu(144)

(hours.10min)

Sd2 to 23.5(143) - nu(144)

(hours.10min)

Sd3 to 23.5(143) - nu(144)

(hours.10min)

Sd4 to 23.5(143) - nu(144)

(hours.10min)

Sd5 to 23.5(143) - nu(144)

(hours.10min)

ENERGY SAVING

ESP P1 Pr1 Energy saving probe selection

HES 0.0 Pr1

PEL n Pr1

Temperature increasing during Energy Saving

Energy saving activation when Light switched off

nP(0) - P1(1) - P2(2) - P3(3) - P4(4) -

P5(5) - tEr(6)

[-54°F to 54°F]

[-30.0°C to 30.0°C]

n(0) – Y(1)

LAN MANAGEMENT

LMd y Pr2 Defrost Synchronization n(0) – Y(1)

dEM y Pr2 Defrost end Synchronization n(0) – Y(1)

LSP n Pr2 SET-POINT Synchronization n(0) – Y(1)

LdS n Pr2

Display Synchronization (temperature sent via LAN)

n(0) – Y(1)

LOF n Pr2 ON/OFF Synchronization n(0) – Y(1)

LLi y Pr2 Light Synchronization n(0) – Y(1)

LAU n Pr2 AUX Synchronization n(0) – Y(1)

LES n Pr2 Energy Saving Synchronization n(0) – Y(1)

LSd n Pr2 Remote probe displaying n(0) – Y(1)

LPP n Pr2 Pressure value sent in LAN n(0) – Y(1)

StM n Pr2

Cooling request from LAN enable compressor relay

n(0) – Y(1)

PROBE CONFIGURATIONS

P1C NtC Pr2 P1 configuration nP(0) - Ptc(1) - ntc(2) - PtM(3)

ot 0.0 Pr2 P1 calibration

[-21°F to 21°F]

[-12.0°C to 12.0°C]

P2C NtC Pr2 P2 configuration nP(0) - Ptc(1) - ntc(2) - PtM(3)

oE 0.0 Pr2 P2 calibration

[-21°F to 21°F]

[-12.0°C to 12.0°C]

P3C NtC Pr2 P3 configuration nP(0) - Ptc(1) - ntc(2) - PtM(3)

o3 0.0 Pr2 P3 calibration

[-21°F to 21°F]

[-12.0°C to 12.0°C]

Table 23-1 - Default Setting Values (Continued)

46 • XM679K I&O Manual 026-1218 Rev 4

Page 53

P4C NtC Pr2 P4 configuration nP(0) - Ptc(1) - ntc(2) - PtM(3)

o4 0.0 Pr2 P4 calibration

P5C 420 Pr2 P5 configuration

o5 0.0 Pr2 P5 calibration

nP(0) - Ptc(1) - ntc(2) - PtM(3) - 420(4)

[-21°F to 21°F]

[-12.0°C to 12.0°C]

- 5Vr(5)

[-21°F to 21°F]

[-12.0°C to 12.0°C]

P6C PtM Pr2 P6 configuration nP(0) - Ptc(1) - ntc(2) - PtM(3)

o6 0.0 Pr2 P6 calibration

[-21°F to 21°F]

[-12.0°C to 12.0°C]

SERVICE

CLt - - - Pr1 ON/OFF percentage (C.R.O.) (read only)

tMd - - - Pr1

Time remaining before next defrost activation (only for interval defrost)

(read only)

LSn - - - Pr1 Number of devices in LAN 1 to 8 (read only)

LAn - - - Pr1 List of address of LAN devices 1 to 247 (read only)

OTHER

Adr 1 Pr1 MODBUS address 1 to 247

rEL - - - Pr1 Firmware release (read only)

Ptb 4 Pr1 Parameter table (read only)

Pr2 - - - Pr1 PR2 menu access (read only)

Table 23-1 - Default Setting Values (Continued)

MODBUS Termination Blocks Default Setting Values • 47

Page 54

Appendix A - Alternate MODBUS COM Wiring

Method for E2, XR, XM, and XEV Devices

Overview

To simplify MODBUS communication wiring with E2, (both Standard and Enhanced versions) XR, XM, and XEV series devices, the alternate method outlined below may be used.

Wire Type

Use Belden 8761 or equivalent cable.

Shield

DO NOT connect the shield to the device. Keep the shield continuous throughout a network segment. The shield

must be twisted together and insulated with electrical tape or heatshrink at each device within a network segment. Securely connect the shield to an earth grounded chassis at each end of a network segment.

Termination

Each network segment must be biased and terminated at the E2 controller’s end (all three jumpers in the MOD position for E2 Enhanced, or all three jumpers in the UP position for E2 Standard) and terminated 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 Controller Hardware

CO M2 supports two network segments: one on connector RS485-COM2A, and the second on connector RS485COM2B.

CO M4 supports two network segments: one on connector RS485-COM4A, and the second on connector RS485COM4B.

COM6 only supports one network segment on connector RS485-COM6.

For E2 Standard 3.x Controller Hardware

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 Technical Support at 770-425-2724.

48 • XM679K I&O Manual 026-1218 Rev 4

Page 55

Figure 1 - MODBUS COM Wiring Diagram

MODBUS Termination BlocksAppendix A - Alternate MODBUS COM Wiring Method for E2, XR, XM, and XEV Devices • 49

Page 56

Page 57

For Technical Support call 770-425-2724 or email ColdChain.TechnicalServices@Emerson.com

The contents of this publication are presented for informational purposes only and they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. 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 selecti on, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any product remains solely with the purchaser and end-user.

Emerson XM670, XM679 Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Introduction

2Overview

1.1. General Warning

2.1. How to Check the Software Release of the XM679K

2.2. General Description

2.3. Ordering Codes

3 User Interface

3.1. Keys and Functions

3.2. Use of LEDS

3.8. How to Enter the Parameters List PR2

3.4. How to See the MAX and MIN Temperature Recorded

3.5. How to See and Modify the Setpoint

How to Enter the Parameters List PR1.

3.6. How to Start a Manual Defrost

3.9. How to Assign a MODBUS Address

3.10.How to Change the Parameter Value

3.11.ON/OFF Function

4 Fast Access Menu

5 Section Menu

5.1. To Set Energy Saving Times

5.2. To Set Timed Defrost Parameters

7 Controlling Loads

7.1. Solenoid Valve

7.2. Standards Regulation and Continuous Regulation

7.2.1. First Kind of Regulation: Standard Regulation

7.3. Defrost

7.3.1. Defrost starting

7.3.2. Defrost Ending

7.4. Fans

7.4.1. Control With Relay

7.4.2. Control With Analog Output (If Present)

7.6. Auxiliary Output

8 Parameters List

9 Digital Inputs

9.4. Door Switch Input (dor)

9.5. Start Defrost (dEF)

9.1. Generic Alarm (EAL)

9.2. Serious Alarm Mode (bAL)

9.3. Pressure Switch (PAL)

9.6. Relay Aux Actuation (AUS)

9.7. Relay Light Actuation (LiG)

9.8. Remote ON/OFF (OnF)

9.9. Kind of Action (Htr)

9.10.FHU (Not Used)

9.11.Energy Saving Input (ES)

9.13.Digital Inputs Polarity

11.1.Probe Connections

12 RS485 Serial Line

13.1.Download (From the Hotkey to the Device)

13.2.Upload (From the Device to the Hotkey)

14 Alarm Signals

14.1.EE Alarm

14.2.Alarm Recovery

15 Technical Data

16 UL Ratings

17 Connections

17.1.E2 to XM Device Communication Recommendations

17.1.1.Wiring Guidelines

17.2.XM670 - Wiring Diagram

17.3.XM679 - 230VAC Valves/Wiring Diagram

17.4.XM679 - 24VAC Valves/Wiring Diagram

18 E2 MODBUS Network Wiring

20.1.Keyboard Display CX660

20.2.Synchronized Defrost

20.3.Sensors for Superheat Control

20.4.Analog Output

20.5.1.RS485 Connection

20.6.How to Enable a Pressure Probe to Share Across the LAN

RS485 Net Monitoring Temperatures Pressure Transducer Setup (XM679 Only) • 35

21 Wiring Connection to Site Supervisor

COM Port Associations - E2 Versions 3.xx and Below ECT MODBUS Networking to E2s • 37

22.3.E2 Setup of Devices

22.3.1.Set Up Network Ports

22.3.2.Add and Connect the Device

22.4.Wiring Types

22.5.MODBUS Termination Blocks