Emerson XM678D User Manual

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1592023140 XM678D GB r2.8 01.09.2017.docx XM678D 1/15

CONTROLLERS FOR MULTIPLEXED CABINETS

WITH STEPPER DRIVER INSIDE

XM678D

-MANUAL FOR THE SW REL. 2.8-

1. GENERAL WARNING ...................................................................................... 1

2. BEFORE PROCEEDING .................................................................................. 1

3. GENERAL DESCRIPTION ............................................................................... 1

4. QUICK REFERENCE GUIDE: HOW TO RUN THE SELF ADAPTIVE

REGULATION IN 5 STEPS. ............................................................................. 1

5. INSTALLATION AND MOUNTING ................................................................... 1

6. WIRING DIAGRAM AND CONNECTIONS ...................................................... 2

7. BATTERY BACK UP CONNECTION ............................................................... 3

8. USER INTERFACE........................................................................................... 4

9. HOW TO PROGRAM THE PARAMETERS (PR1 AND PR2) .......................... 4

10. FAST ACCESS MENU ..................................................................................... 4

11. MENU FOR MULTIMASTER FUNCTION: SEC .............................................. 5

12. COMMISSIONING ............................................................................................ 5

13. KIND OF REGULATION FOR SUPERHEAT: SELF ADAPTIVE OR MANUAL

OPERATING MODE ......................................................................................... 6

14. DISPLAY MESSAGES ..................................................................................... 6

15. USE OF THE PROGRAMMING HOT-KEY ...................................................... 7

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

17. TECHNICAL DATA ........................................................................................... 8

18. DEFAULT PARAMETER MAP ......................................................................... 9

1. GENERAL WARNING

1.1 PLEASE READ BEFORE USING THIS MANUAL

 This manual is part of the product and should be kept near the instrument for easy

and quick reference.

 The instrument shall not be used for purposes different from those described

hereunder. It cannot be used as a safety de vice.

 Check the application limits before proceeding.  Dixell Srl reserves the right to change the composition of its products, even

without notice, ensuring the same and unchanged functionality.

1.2 SAFETY PRECAUTIONS

 Check the supply voltage is correct before connecting the instrument.  Do not expose to water or moisture: use the controller only within the operating

limits avoiding sudden temperature changes with high atmospheric humidity to prevent formation of condensation

 Warning: disconnect all electrical connections before any kind of maintenance.  Fit the probe where it is not accessible by the End User. The instrument must not

be opened.

 In case of failure or fault y operation send the instrument back to the distributor or

to “Dixell S.r.l.” (see address) with a detailed description of the fault.

 Consider the maximum current which can be applied to each relay (see Technical

Data).

 Ensure that the wires for probes, loads and the power supply are separated and

far enough from each other, without crossi ng or intertwining.

2. BEFORE PROCEEDING

2.1 CHECK THE SW REL. OF THE XM678D

1. Look at the SW rel. of XM678D printed on the label of the controller.

2. If the SW release is 2.8, proceed with this manual otherwise contact Dixell

to get the right manual.

3. GENERAL DESCRIPTION

The XM678D is a microprocessor based controller for multiplexed cabinets suitable for applications on medium or low temperature. It can be inserted in a proprietary LAN with up to 8 different sections which can operate, depending on the programming, as stand alone controllers or following the commands coming from the other sections. The XM678D is provided with 6 relay outputs to control the solenoid valve, defrost - which can be either electrical or hot gas - the evaporator fans, the lights, an auxiliary output and an alarm output and with the stepper valve driver. The de vice is also equipped with six probe inputs: for temperature control, for control the defrost end temperature, for display and the fourth can be used for application with virtual probe or for inlet/outlet air temperature measurement. Moreover, fifth and sixth probe are used to evaluate and control the superheat. Finall y, the XM678D is equipped with the three digital inputs (free contact) fully configurable by parameters. The device is equipped with the HOT-KEY connector that permits to be programmed in a simple way. The optional direct serial output RS485 (ModBUS compatible) permits a simple XWEB interfacing. RTC is available as options. The HOT-KEY connector can be used to connect X-REP displa y (Depending on the model).

4. QUICK REFERENCE GUIDE: HOW TO RUN THE SELF ADAPTIVE REGULATION IN 5 STEPS.

1. After wiring the XM678D, configure the type of valve, bipolar or unipolar, via tEu (Default tEu = bP: bipolar) and tEP (Default tEP =0) parameters or through the manual settings. See par. 6.3 for

details.

NOTE: for Alco EX4, EX5, EX6 tEP = 11 For EX3: tEP = 12

2. Set the proper gas via Fty parameter, among the following

LABEL

REFRIGERANT

OPERATING RANGE

R22

r22 -50-60°C/-58÷120°F

134

r134A -50-60°C/-58÷120°F

290

r290 – Propane -50-60°C/-58÷120°F

404

r404A -70-60°C/-94÷120°F

47A

r407A -50-60°C/-58÷120°F

47C

r407C -50-60°C/-58÷120°F

47F

r407F -50-60°C/-58÷120°F

410

r410A -50-60°C/-58÷120°F

448

r448A -45-60°C/-69÷120°F

449

r449A -45-60°C/-69÷120°F

450

r450A -45-60°C/-69÷120°F

507

r507 -70-60°C/-94÷120°F

513

r513A -45-60°C/-69÷120°F

CO2

r744 - Co2 -50-60°C/-58÷120°F

Pre-set gas is R404A.

3. Configure the probes:

- Regulation and evaporator probe are preset as NTC. If another kind of

sensors is used, set it via P1c and P2c parameters.

- Superheat evaporator outlet probe is pre-set as Pt1000, if another kind

of sensor is used, set it via P6c parameter.

- The PP11 (-0.5÷11bar) is pre-set as pressure probe. It operates at relative

pressure (Pru = rE). If you’re using a ratiometric transducer, set P5c = 0-5, then use parameters

PA4 and P20 to set the range NOTE: check the pressure gauge reading with the value of dPP, press the UP arrow once to enter the Fast Access Menu. If ok, proceed; otherwise

solve the situation before proceeding acting on par. Pru, PA4 and P20.

4. Set the parameters for self adaptive regulation of superheat NOTE: the parameters Pb (regulation band) and Int (integral time) are

automatically calculated by the controller

- Set CrE = no, this disable the continuos regulation of the temperature.

Default is CrE = no.

- Set SSH, superheating setpoint: a value between 4 and 8 is

acceptable.Default is SSH=8-

- Set AMS = y to start the self adaptive regulation. Default is AMS = y

- Set ATU = y to start the search of the lowest stable superheat. Default is

ATU = y. This function reduces automatically the setpoint in order to optimize the use of the evaporator, keeping, at the same time, the superheating regulation stable. The minimum allowed SH set point is LSH+2°C.

- Set LSH, low superheating limit: a value between 2-4 is acceptable.

Default is LSH = 3

- Set SUb, pressure filter: Default is SUb = 10. The value can be increased

up to 20 in case of too fast response of the pressure variations.

5. Set the parameters for the temperature regulation

- Set the temperature setpoint. Default is -5°C

- Set the differential HY: Default is 2°C.

- If the capacity of the valve is higher than requested, it can be reduced by

the par. MNF (Default is 100). A proper setting of MnF will reduce the time that the algorithm takes to reach the stability. MNF value doesn’t affect the band witdh

5. INSTALLATION AND MOUNTING

This device can operate without any user interface, but normal application is with Dixell CX660 keyboard.

Figure 1a

Figure 1b

The

CX660 keybo

ard

shall

be mounted on vertical panel, in a 29x71 mm hole, and fixed using the special bracket supplied as shown in fig. 1a/1b. 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. Let air circulate by the cooling holes.

Figure 1c

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6. WIRING DIAGRAM AND CONNECTIONS

6.1 IM PORTANT NOTE

XM device is provided with disconnectable terminal block to connect cables with a

cross section up to 1.6 mm2 for all the low voltage connection: the RS485, the LAN, the probes, the digital inputs and the keyboard. Other inputs, power supply and relay connections are provided with screw terminal block or fast-on connection (5.0 mm). Heat-resistant cables have to be used. Before connecting cables make sure the power supply com plies with the instrument’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 rela y, in case of heavier loads use a suitable external relay. N.B. Maximum current allowed for all the loads is 16A. T he probes shall be mounted with the bulb upwards to prevent damages due to casual liquid infiltration. It is recommended to place the thermostat probe away from air s treams to correctly measure the average room tem perature. Place the defrost termination probe among the evaporator fins in the coldest place, where most ice is formed, far from heaters or from the warmest place during defrost, to prevent premature defrost term ination.

6.2 XM 678D

6.3 VALVE CONNECTIONS AND CONFIGURATION

6.3.1 Type of cables and max lenght

To connect the valve to the controller, use onl y shielded cables with section greater than or equal to 0.823 mm² (AWG18). A twisted shielded cable with the the above specification is suggested. Don’t connect the shield to any ground, live it floating.

The max distance between an XM controller and a valve must not exceed 10 m.

6.3.2 Valve selection

To avoid possible problems, before connecting the valve configure the driver by making the right changes on the parameters. a. Select the kind of motor (tEU parameter) b. Check if the valve is present in tEP parameter tabl e reported here below.

 CHECK THE FOLLOWING TABLE FOR A RIGHT SETTING 

!!!!! In any case, the unique and valid reference has to be considered the datasheet made by valve manufacturer. Dixell cannot be considered responsible in case of valve damaging due to wrong settings!!!!!!

tEP Model

LSt

(steps*10)

uSt

(steps*10)

CPP

(mA*10)

CHd

(mA*10)

(step/s)

tEu (bip/

unip)

HSF

(Half/full)

0 Manual settings

Par Par Par Par Par Par Par

Danfoss ETS-25/50

7 262 10 10 300

bP FUL

Danfoss ETS-100

10 353 10 10 300

bP FUL

tEP Model

LSt

(steps*10)

uSt

(steps*10)

CPP

(mA*10)

CHd

(mA*10)

(step/s)

tEu (bip/

unip)

HSF

(Half/full)

Danfoss ETS-250/400

11 381 10 10 300

bP FUL

Sporlan SEI .5 to 11

0 159 12 0 200

bP FUL

Sporlan SER 1.5 to 20

0 159 12 0 200

bP FUL

Sporlan SEI 30

0 319 16 0 200

bP FUL

Sporlan SER(I) G,J,K

0 250 12 0 200

bP FUL

Sporlan SEI-50

0 638 12 0 200

bP FUL

Sporlan SEH(I)-100

0 638 12 0 200

bP FUL

Sporlan SEH(I)-175

0 638 12 0 200

bP FUL

Emerson EX4/EX5/EX6

5 75 50 10 500

bP FUL

Emerson EX3

2 33 0 0 50

uP HAF

If you can see your valve on the table, please select the valve through tEP parameter. In this way, you can be sure of a right configuration. About the conn ection, please pay attention to the following table to have a quick reference on the connection mode for valves of different manufacturer

4 WIRES VALVES (BIPOLAR)

Connection

numbering

ALCO

EX4/5/6/7/8

SPORLAN

SEI-SEH-

SER

DANFOSS

ETS

45 BLUE WHITE BLACK 46 BROWN

BLACK WHITE 47 BLACK RED RED 48 WHITE GREEN

GREEN

5-6 WIRES VALVES (UNIPOLAR)

Connection

numbering

SPORLAN SAGINOMIYA

45 ORANGE

ORANGE

RED RED 47 YELLOW

YELLOW

BLACK BLACK 49 –

Common

GRAY GRAY

AFTER M AKING THE CONNECTION, PLEASE SWITCH OFF AND ON THE CONTROLLER IN ORDER TO BE SURE OF THE RIGHT POSITIONING OF THE VALVE.

6.4 WIRING CONNECTION OF EMERSON EX3 VALVE

XM678D AND EX3 CONNECTION

The EX3 valve integrates a solenoid val ve with posisitive shut off on the top and a stepper valve.

Verify the coil voltage of solenoid valve, and connect it to the main line.

6.4.1 EX3 with 24Vac coil: transformer capacity.

When the coil of the EX3 is at 24Vac and a UNIQUE transformer is used to supply botht the controller and the coil of the valve, a 40VA transformer must be used, like

TF40D. Any transformer with lower capacity can damage the valve or the controller

6.4.2 Stepper valve connection

The EX3 unipolar valve has to be connected to the following terminals.

XM678D

EX3

Terminal 49 Grey wire Terminal 48 Blue wire

Terminal 47 Black wire Terminal 46 Brown wire Terminal 45 White wire

E.I. Connection of EX3. Verify the voltage of the coil of the shut off valv e in the EX3 before connecting

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6.5 ABSOLUTE MAXIMUM POWER

XM678D is able to drive a wide range of stepper valves, on the following table are

indicated the maximum values of current that the actuator can supply to the stepper wiring. The TF20D Dixell transformer has to be used.

NOTE: the electrical power absorption of the valve can be unrelated to refrigeration power that valve has. Before using the actuator, please rea d the technical manual of the valve supplied by the manufacturer and check the maximum current used to drive the valve in order to verify that they are lower than those indicated below.

VALVE

TYPE

BIPOLAR VALVES

(4 wires)

Maximum Current 0.5A

UNIPOLAR VALVES

(5-6 wires)

Maximum Current 0.33A

6.6 KEYBOARD DISPLAY CX660

The XM678D board can operate also without keyboard.

Polarity

Terminal [34] [-] Terminal [35] [+]

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

Max distance: 30m

6.7 LAN CONNECTION

Follow next steps to create a LAN connection, which is a necessary condition to perform synchronized defrost (also called master-slave functioning):

1) connect a shielded cable between terminals [38] [-] and [39] [+] for a maximum of 8 sections;

2) the Adr parameter is the number to identify each electronic board. Address duplication is not permitted, in this case the synchronized defrost and the communication with monitoring system is not guaranteed (the Adr is also the ModBUS address). For example, a correct configuration is the following:

If the LAN is well connected, the green LED will be ON. If the green LED blinks then the connection is wrongly configured.

The max distance allowed is 30m

6.8 SENSORS FOR SUPERHEAT CONTROL

Temperature probe:

Pb6

terminals

[19] -

[20] without

any polarity.

Select the kind of sensor with P6C parameter.

Pressure transducer: Pb5 terminals: [21] = input of the signal; [22] = Power Supply for 4to20mA transducer; [20] = GND; [23] = +5Vdc power supply for ratiometric pressure transducer.

Select the configuration of the transducer with param eter P5C.

6.9 HOW TO USE ONLY ONE PRESSURE TRANS DUCER ON

MULTIPLEXED APPLICATIONS

A working LAN connection is required (green LED lit on all XM678D boards of the same LAN). Connect and configure a pressure transducer only on one XM678D of the network. Afterwards, the value of pressure read by the unique transducer con nected will be available to each device connected to the same LAN.

By pressing UP ARROW button, the user will be able to enter a fast selection menu and to read the value of the following parameters :

dPP = measured pressure (only on master de vice); dP5 = value of temperature obtained from pressure temperature conversion; rPP = pressure value read from remote location (only for slave devices).

Examples of error messages:

dPP = Err  the local transducer read a wrong value, the pressure is out of the

bounds of the pressure transducer or the P5C param eter is wrong. Check all these options and eventually change the transducer;

rPF  the remote pressure transducer is on error situation. Check the status of the

onboard GREEN LED: if this LED is OFF the LAN is not working, otherwise check the remote transducer.

LAST CHECKS ABOUT SU PERHEAT

On the fast access menu:

dPP is the value read by the pressure gauge; dP6 is the value read by the temperature probe, temperature of the gas on the outlet

section of the evaporator; SH is the value of the superheat. The n A or Err messages mean that the superheat has no sense in that moment and its value is not available.

6.10 HOW TO CONNECT MONITORING SYSTEM

1) Terminals [36] [-] and [37] [+].

2) Use shielded twisted cable. For example Belden® 8762 o 8772 or cat 5 cables.

3) Maximum distance 1Km.

4) Don’t connect the shield to the earth or to GND terminals of the device, avoid accidental contacts by using insulating tape.

Only one device for each LAN has to be connected to the RS485 connection.

The Adr parameter is the num ber to identify each electronic board. Address duplication is not permitted, in this case the synchronized defrost and the

communication with monitoring system is not guaranteed (the Adr is also the ModBUS address).

6.11 DIGITAL INPUTS

1) The terminals from [30] to [33] are all free of voltage;

2) Use shielded cable for distance higher than one meter;

For each input, 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. The i1P can be: cL = active when closed; oP = active when opened. The i1F parameter can be: EAL = external alarm, bAL = serious lock alarm, PAL = pressure switch alarm, dor = door switch, dEF = external defrost, AUS = auxiliary activation command, LiG = light activation, OnF = board On/OFF, FHU = don’t use this configuration, ES = day/night, HdY = don’t use this configuration. Then there is i1d parameter for delay of acti vation. For the others digital inputs there are a set of the same parameters: i2P, i2F, i2d, i3P, i3F, i3d.

6.12 ANALOG OUTPUT

 Selectable between 4 to 20mA and

0 to 10Vdc.

 Use CABCJ15 to perform the

connections

It’s located near the terminal [39] on a 2-pin connector. It’s possible to use the output to control anti-sweat heaters through a chopped phase controller XRPW 500 (500watt) or family XV...D or XV...K.

7. BATTERY BACK UP CONNECTION

7.1 CONNECTION OF XEC SUPERCAP

XEC Supercap is designed to be used with Di xell products (XM678D, XEV, IEV and others); compatibility with Dixell devices has to be verified in the user manual/technical sheet of the device. In case of dubt, please contact Dixell Service department.

!!!!! IMPORTANT !!!!!

XEC Supercap and XM678D must be powered by two different transforme rs; the failure of the observance of this rule m ay result in damage to the XEC Supercap and / or the connected XM678D.

Wiring connection

XM678D

XEC

Terminal 61 (+) Terminal 4 (12Vdc) Terminal 62 (-) Terminal 3 (gnd)

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7.2 EM ERSON ECP-024 CONNECTION

The Emerson ECP-024 rechargeable acc umulator can be connected to the XM678D to close the stepper valve in case of power interruption.

Wiring connection

XM678D

ECP-024

Terminal 61 (+) Terminal + Terminal 62 (-) Terminal -

About conditions of use and limitation please refer to the ECP-024 manuals.

8. USER INTERFACE

8.1 DIRECT COMMAND INTERFACE

8.2 ICONS

Cooling output

↓

With icon ON the output is active, while with blinking icon there is a delay.

MEASUREMENT UNIT

°C, Bar an d (time)

are ON depending on the selection.

Light →

← Fan

Defrost →

AUX

← Auxiliary relay

Energy saving

→

← Multimaster

Enabled

Generic alarm

→

← Clock / time

DURING PROGRAMMING

: blink the measurement units of temperature and

pressure

8.3 KEYBOARD COMM ANDS

Single commands:

LIGHT relay

Press light button.

AUX relay

Press down arrow.

Manual defrost

Press and hold for 3 sec the defrost button

ON/OFF

Press for 3

sec the

ON/OFF

button (if the function is

enabled).

nergy Saving

Press for 3

sec the

ON/OFF

button (if the function is

enabled).

Double commands:

Press and hold for about 3 sec to lock (Pon) or unlock (PoF) the keyboard.

Pressed together to exit from programm ing mode or from menu; on submenus rtC and EEV this combination allow to come back to previous level.

Pressed together for 3 sec allow to acc ess to first level of programming mode.

8.4 HOW TO MODIFY THE SET POINT FOR AIR TEM PERATURE REGULATION

The thermostat set point is the value that will be used to regulate the air temperature. The regulation output is controll ed by the electronic valve or by the relay.

BEGIN

Press SET button for 3 sec, the measurement units will blink together.

Value

modification

With the arrows it’s possible to change the value within the LS and US parameters value.

EXIT

By pressing SET it is possible to confirm the value that will blink for about 2 sec.

In a ny case, it is possible to wait for about 10 sec to exit. In order to show the air temperature set is sufficient to press and release the SET button, the value is displayed for about 60 sec.

9. HOW TO PROGRAM THE PARAMETERS (PR1 AND PR2)

The device provide 2 programming levels: Pr1 with direct access and Pr2 protected with a password (intended for experts).

ACCESS to Pr1

Press and hold for about 3 sec to have access to the first programming level (Pr1).

Select item

Select the parameter or submenu using the arrows.

Show value

Press SET button.

Modify

Use the arrows to modify the value.

Confirm and store

Press SET key: the value will blink for 3 sec, and then the display will show the next parameter.

EXIT

Instantaneous exit from the programming mode, otherwise wait for about 10 sec (without press any button).

9.1 HOW TO HAVE ACCESS T O “PR2”

To enter Pr2 programming menu:

1. Access to a Pr1 menu by pressing both SET+DOWN keys for 3 sec, the first parameter label will be showed;

2. Press DOWN key till the Pr2 label will be showed, then press SET;

3. The blinking PAS label will be showed, wait some seconds;

4. Will be showed “0 - -” with blinking 0: insert the password [321] using the keys

UP and DOWN and confirmi ng with SET key.

GENERAL STRUCTURE: The first two item rtC and EEV are related to submenus

with others parameters.

 SET+UP keys on rtC or EEV submenus allow coming back to parameter list,  SET+UP keys on parameter list allow immediate exit.

9.2 HOW TO MOVE PARAMETER FROM PR1 TO PR2 AND VICE VERSA

Enter on Pr2; select the parameter; press together [SET + DOWN]; a left side LED ON gives to the parameter the presence on Pr1 level, a left side LED OFF means that the parameter is not present on Pr1 (only Pr2).

10. FAST ACCESS MENU

This menu contains the list of probes and some values that are automatically evacuate by the board such as the superheat and the percentage of valve opening. The values: nP or noP stands for probe not present or value not evacuate, Err value out of range, probe damaged not connected or incorrectly configured.

Entering

fast

access

By press and release the

UP arrow

. The

duration

of the menu in case of inactivity is about 3 min. The values that will be showed depend on the configuration of the board.

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Use

arrows to select an

entry,

then

press

to see the

value or to go on

with other

value.

HM Access to clock menu or reset of the RTC alarm; An Value of analog output; SH Value of superheat. nA = not Available; oPP Percentage of valve opening. dP1 (Pb1) Value read by probe 1. dP2 (Pb2) Value read by probe 2. dP3 (Pb3) Value read by probe 3. dp4 (Pb4) Value read by probe 4. dP5 (Pb5) Tem perature read by probe 5 or value obtained from

pressure transducer.

dP6 (Pb6) Value read by probe 6. dPP Pressure value read by (Pb5) transducer. rPP Virtual pressure probe, only on slave. L°t Minimum room temperature; H°t Maximum room temperature; dPr Virtual probe for room temperature regulation [rPA and rPb]; dPd Virtual probe for defrost management [dPA]; dPF Virtual probe for fan management [FPA]; rSE Real thermoregulation set point: the value includes the sum of

SET, HES and/or the dynamic set point if the functions are

enabled.

Exit

Pressed together or wait the timeout of about 60 sec

11. MENU FOR MULTIMASTER FUNCTION: SEC

The function “section” SEC is enabled when icon is lit. It allows entering in the remote programming mode, from a keyboard not physically connected to the board, through the LAN functionality.

Action

Button or

display

Notes

Enter menu

Press UP arrow for about 3 sec, the icon will be ON.

Waiting for action

SEC

The menu to change the section will be entered. SEC label will be displayed.

Enter section list

Press

SET

to confirm. The following list will

be available to select the proper network function.

Select proper function

LOC

ALL

SE1

SEn

SE8

To gain access only to the local device.

To gain access to all the devices connected

to the LAN.

To gain access to the device with 1st Adr (*)

…

To gain access to the device with 8th Adr (*)

Confirm

Select and confirm an entry by pressing

SET

button.

Exit menu

Press

SET

and UP

together

wait about 10

seconds. (*) The devices on the LAN are indexed by using the Adr parameter (in asc ending order).

EXAMPLES:

1. T o modify the same parameter values in all the devices connected to the LAN :

enter multim aster menu. Select and confirm ALL. Exit from multimaster menu. Enter the programming menu and change the required parameter values. The new values will be changed on all devices connected to the LAN.

2. T o modify a parameter value in the device with [ Adr = 35]: find the rele vant indexed section (the one linked to [ Adr = 35]). Enter multimaster menu. Select and confirm this section from the multimaster menu. Exit from multimaster menu. Enter the programming menu and change the required parameter value.

3. If the alarm nod is present: enter the multimaster menu. Select and confirm the LOC section. Exit from multimaster menu.

AT THE END OF THE PR OGRAMMING PROCEDURE, SELECT THE

SECTION “LOC”. IN THIS WAY THE ICON WILL BE SWITCHED OFF !!

11.1 SYNCHRONIZED DEFROST

The synchronized defrost allow to manage multiple defrost from different boards connected through the LAN connection. In this way, the boards can perform simultaneous defrosts with the possibility to end them in a synchronized way.

The Adr parameter cannot be duplicated because in this case the defrost cannot

be correctly managed.

BEGIN

Press for 3 seconds, the rtC or other will be showed. The measurement unit blinks.

Find Adr

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

Modify

Adr

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

EXIT

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

The LSn and LAn parameter are only to show the actual settings (read only). Se the following example of configuration:

DAILY DEFROST FROM RTC: [EdF = rtC]

IdF Parameter: for safety reason force the value of Idf at +1 respect to the interval

between two Ld parameters. The IdF timer is reinitialized after defrost and at every power-on.

DEFROST START: at the time selected by the parameters Ld1 to Ld6 or Sd1 to Sd6. DEFROST END: if the probes reach the dtE temperature or for maximum MdF time. SAFETY and RtC or RtF ALARM: with clock alarm the device will use the parameter IdF, dtE and MdF.

WARNING: don’t set [EdF = rtC] and [CPb = n].

MULTIMASTER DEFROST: all the probes with clock Table for example

Par. Unit A (RTC)

Unit B (RTC)

Unit C (RTC)

Adr

n N + 1 N + 2

EdF

rtC (clock) rtC (clock) rtC (clock)

IdF

9 hours safety 9 hours safety 9 hours safety

MdF

45 min safety 45 min safety 45 min safety

dtE

12°C safety 12°C safety 12°C safety

Ld1

06:00 1° 06:00 1° 06:00 1°

Ld2

14:00 2° 14:00 2° 14:00 2°

Ld3

22:00 3° 22:00 3° 22:00 3°

12. COMMISSIONING

12.1 CLOCK SETTING AND RTC ALARM RESET

If the clock is present: [EdF = rtC] enable the defrost from rtc [Ld1 to Ld6].

BEGIN

UP arrow (press once) to access the fast access

Display

HM identify the clock RTC submenu; press

Display

HUr = hour  press to confirm/modify Min = minutes  press to confirm/modify …… don’t use others parameters if present.

EXIT

Press for about 10 sec. The operation resets the RT C alarm.

Note: the rtC clock menu is present also on the second level of parameters. Warning: if the board shows the rtF alarm, the device has to be changed.

12.2 ELECTRONIC VALVE SETTINGS

Some parameters have to be checked: [1] Superheat temperature probe: Ntc, Ptc, Pt1000 with parameter P6C. The sensor has to be fixed at the end of the evaporator.

[2] Pressure transducer: [4 to 20mA] or ratiometric P5C = 420 or 5Vr with parameter P5C. [3] Range of measurement: check the parameter of conversion PA4 and P20 that are

related to the transducer. TRANSDUCER: [-0.5/7Bar] or [0.5/8Bar abs] the correct setup is relative pressure with PA4 = -0.5 and P20 = 7.0. The [0.5/12Bar abs] the correct setup is relative pressure with PA4 = -0.5 and P20 = 11.00.

Example of virtual pressure with unique [4 to 20mA] or [0 to 5V] transducer:

Param.

XM6

x8D_1

without transducer

XM6x8D_2

with

transducer

XM6x8D_3+

without transducer

Adr

n n + 1 n + 2

LPP

LPP = n LPP = Y LPP = n

P5C

LAN or not connect

the probe

P5C= 420 or 0-5V

LAN or not connect

the probe

PA4

Not used -0.5 bar Not used

P20

Not used 7.0 bar Not used

[4] From EEV submenu: select the correct kind of gas with FTY parameter. [5] Use the following parameters to setup the right valve driving, according to the valve

datasheet from the manufacturer.

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tEU Type of Stepper motor: [uP-bP] it permits to select the kind of valve. uP = 5 -

6 wi res unipolar valves; bP = 4 wires bipolar valves; !!!!! WARNING !!!!! by

changing this parameter the valve has to be reinitialized.

tEP Predefined valve selection: [0 to 10] if [tEP = 0] the user has to modify all the

parameters of configuration in order to use the valve. If tEP is different from 0 the device performs a fast configuration of the following parameters: LSt, uSt,

Sr, CPP, CHd. To select the right number please read the following table:

tEP

Model

LSt

(steps

*10)

uSt

(steps

*10)

CPP

(mA*

10)

CHd

(mA*

10)

(step/

tEu

(bip/

unip)

HSF

(Half

/full)

0 Manual settings

Par Par Par Par Par Par Par

Danfoss ETS-25/50

7 262 10 10 300

bP FUL

Danfoss ETS-100

10 353 10 10 300

bP FUL

Danfoss ETS-

250/400

11 381 10 10 300

bP FUL

Sporlan SEI .5 to 11

0 159 12 0 200

bP FUL

Sporlan SER 1.5 to

0 159 12 0 200 bP FUL

Sporlan SEI 30

0 319 16 0 200

bP FUL

Sporlan SER(I)

G,J,K

0 250 12 0 200

bP FUL

Sporlan SEI-50

0 638 12 0 200

bP FUL

Sporlan SEH(I)-100

0 638 12 0 200

bP FUL

Sporlan SEH(I)-175

0 638 12 0 200

bP FUL

Emerson

EX4/EX5/EX6

5 75 50 10 500

bP FUL

Emerson EX3

2 33 0 0 50

uP HAF

If tEP is different from 0 previous configuration of LSt, uSt, Sr, CPP and CHd are overwritten.

HFS Kind of motor movement: (HAF; FUL)

HAF = half step. Use this setting for the unipolar valve. FUL = half step. Use this setting for the bipolar valve.

LSt Minimum number of steps: [0 to USt] it permits to select the minimum number

of steps. At this number of steps the valve should be closed. So it’s necessary the reading of manufacturer datasheet to set correctly this parameter. It’s the minimum number of steps to stay in ad vised range of functioning. !!!!!

WARNING !!!!! By changing this parameter the valve has to be reinitialized. The device performs this procedure automatically and restarts its normal functioning when the programming mode ends.

USt Maximum number of steps: [LSt to 800*10] it permits to select the maximum

number of steps. At this number of steps the valve should be completely opened. Read the datasheet provided by manufacturer of the valve to set correctly this parameter. It’s the ma ximum number of steps to stay in advised range of functioning. !!!!! WARNING !!!!! By changing this parameter the

valve has to be reinitialized. The device performs this procedure automatically and re starts its normal functioning when the programming mode ends.

ESt Extra step during closing phase: (0 to 255 (*10)) it sets the number of e xtra

steps the controller performs, when the valve is closed at start up, and during the pauses of regulation, to force the closure of the valve.

NOTE: to set ESt the following steps has to be done:

1. Set the kind of v alve by the parameter tEP. This pre-set the parameters related to the valve

2. Set the right value of ESt

Sr Step rate [10 to 6 00 step/sec] i t’s the ma ximum speed to change step without

losing precision (means without losing steps). It’s advised to stay under the maximum speed.

CPP Current per phase (only bipolar valves): [0 to 100*10mA] it’s the maximum

current per phase used to drive val ve. It’s used only with bipolar valves.

CHd Holding current per phase (only bipolar valves): [0 to 100*10mA] it’s the

current per phase when the val ve is stopped for more than 4 minutes. It’s used

only with bipolar valves.

13. KIND OF REGULATION FOR SUPERHEAT: SELF ADAPTIVE OR MANUAL OPERATING MODE

13.1 PRESSURE FILTERING – SUB PARAMETER

For a good SH regulation, it’s important to use a filtered value of the pressure. This can be done by the parameter Sub. Suggested values:

From 1-5 evaporators for each racks: Sub = 15 From 6-30 evaporators for each racks: Sub = 10 More than 30 evaporators for each racks: Sub =5

13.2 GENERAL CONSIDERATIONS

The controller is able to regulate the superheat in manual or self adaptive mode, according to the value of the parameter AMS, autotuing enabling.

 With AMS = n: the normal SH regulation is performed  With AMS = y: the self adaptive SH regulation is performed

13.3 MANUAL OPERATING MODE - AMS = NO

The temperature and SH regulation can be performed in 2 ways according to the value of the parameter CrE: on/off or continuous. See below in details.Standard temperature regulation

13.3.1 ON/OFF TEMPERATURE REGUL ATION [CrE = n]

1. Temperature regulation is ON/OFF and it depends on the SET point and HY parameter (dfferential) Valve i s closed when the temperature reaches the set point and open when the temperature is higher than set point + differential.

2. The superheat is regulated to be closer to its set point.

3. With more pauses normally also the humidity is bigger.

4. Regulation pauses can be realized using Sti and Std parameters (during these pauses the valve is closed).

13.3.2 COUNTINUOUS REGULATION OF THE TEMPERATURE [CrE = Y] (with

superheat regulation):

1. The HY parameter becomes temperature band for PI control. A default good value is 6°C.

2. The regulation of injection is continuous and the cooling output is always on. The icon is always ON excluding the defrost phase.

3. The superheat is regulated following the SSH parameter.

4. Regulation pauses can be realized using Sti and Std parameters (during these pauses the valve is closed).

5. Increasing the Int integral time it is possible to decrease the speed of reaction of the regulator on the HY band.

13.4 SELF ADAPTIVE OPERATING MODE – AMS = YES

Auto-adaptive means to find and maintain the condition of th e lowest super heating according to the load and en vironmental conditions present in a given time on the evaporator. The parameter AMS enables the self adapti ve mode for the superheat regulation. In this functioning the values of Pb and inC parameter are automatically set by t he controller according to the kind of applications and the response of the system.

With the AMS = YES, CrE must be set at NO.

The self adaptive algorithm does not affect, the functions related to the forced opening of the valve in special situation such as:

 Forced opening of the valve at start of regulation, parameter SFd

(percentage) and SFd (time).

13.5 MINIMUM STABLE SUPERHEAT SEARCH - AMS = YES, ATU =

YES

With the parameter ATU, the minimum stable superheat search function is enabled.

With ATU = yES controllers start searching the mimimum stable value for the SH, the

minimum admitted value in any case is LSH + 2°C (4°F). Please take it in consideration, before setting LSH value.

13.6 VALVE CAPACITY REDUCING – MNF PARAMETER

Thanks to the parameter MnF it’s possible to reduce the capacity of the valve, to fine tune the valve to the evaporator. The regulation band is not affected from the modification of the MnF parameter. See below the behaviour of the capcity of t he valve, when the MnF parameter is adjusted.

NOTE: during the soft start phase (oPE, SFd), MnF parameter is not taken in consideration and the capacity of the valve is set by the parameters oPE and oPd, respectively.

13.7 AUTO ZERO PROCEDURE (GO HOME FUNCTIONS).

To prevent any possible wrong position caused by a long period of working for the step valve without closing, the controller after gtH hours, as soon as the opening open percentage is under 20%, will force a “go home” procedure:

1. Close the valve at max speed, till the complete closure is reached.

2. Perform extra steps (ESt)

3. Re-open to the requested regulation position

This procedure is valid for all the valves, and it has to be done at set speed fo r each valve

14. DISPLAY MESSAGES

Display

Causes

Notes

KEYBOARD

1 nod

No display: the keyboard is trying to work with another board that is not working or not present

Press for 3 sec UP arrow,

enter

the SEC menu and select LOC entry.

2 Pon

Keyboard is unlocked

3 PoF

Keyboard is locked

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Display

Causes

Notes

4 rSt

Alarm reset Alarm output deactivated

noP, nP

Not present (configuration) Not available (evaluation)

6 noL

The keyboard is not able to communicate with the XM668D or XM678D

Verify the connection. Call the Service

ALARM FROM PROBE INPUT

PPF

CPF

Sensor brake down, value out of range or sensor incorrectly configured P1C, P2C to P6C.

PPF can be showed by slaves of pressure that don’t receive the value of pressure.

CPF is showed when the remote probe 4 is not working.

P1: the cooling output works with Con and COF, With defrost probe on error the defrost is performed only at interval.

For P5, P6 and PPF: the percentage of the valve opening is fixed at PEO value.

TEMPERATURE ALARM

7 HA

Temperature alarm from parameter

ALU on probe rAL.

Outputs unchanged.

8 L A

Temperature alarm from parameter

ALL on probe rAL.

Outputs unchanged.

9 "HAd

Defrost high temperature Outputs unchanged.

10 "LAd”

Defrost low temperature Outputs unchanged.

11 "FAd”

Fan low temperature Outputs unchanged.

12 "HAF”

Fan high temperature Outputs unchanged.

DIGITAL INPUT ALARM

13 dA

Door open alarm from input

i1F

i2F or i3F = after delay d1d, d2d or d3d.

Cooling relay and fan follow the

odc parameter. Cooling restart as specified on rrd parameter.

14 EA

Generic alarm from digital input

i1F, i2F, i3F = EAL.

15 CA

Severe alarm of regulation lock from digital input i1F, i2F, i3F = bAL.

Regulation output OFF.

16 PAL

Pressure switch lock

i1F, i2F

i3F

= PAL.

All the outputs are OFF.

ELECTRONIC VALVE ALARM

17 LOP

Minimum operating pressure threshold from LOP parameter.

The valve output increases its opening of dML quantity every second.

18 MOP

Maximum operating pressure threshold from MOP parameter.

The valve output decreases its opening of dML quantity every second.

19 LSH

Low superheating from LSH parameter and SHd delay.

The valve will be closed; the alarm will be showed after SHd delay.

20 HSH

High superheating from

HSH

parameter and SHd delay.

Only display.

CLOCK ALARM

21 rtC

Clock settings lost.

Defrost will be performed with IdF till restoring the settings of RTC.

22 rtF

Clock damaged.

Defrost will be performed with

IdF.

OTHERS

23 EE

EEPROM serious problem. Output OFF.

24 Err

Error with upload/download parameters.

Repeat the operation.

25 End

Parameters have been correctly transferred.

14.1 ALLARM RECOVERY

Probe alarms P1, P2, P3 and P4 start some seconds after the fault in the related probe; they automatically stop some seconds after the probe restarts normal operation. Check connections before replacing the probe. Temperature alarms HA, LA, HA2 and L A2 automatically stop as soon as the temperature returns to normal values. Alarms EA and CA (with i1F = bAL) recover as soon as the digital input is disabled. Alarm CA (with i1F = PAL) recovers only by switching off and on the instrument.

15. USE OF THE PROGRAMMING HOT-KEY

The XM units can UPLOAD or DOWNLOAD the parameter list from its own E2 internal memory to the HOT-KEY and vice-versa through a TTL connector. Using HOT-KEY

the Adr will not changed.

15.1 DOWNLOAD (FROM THE HOT-KEY TO THE INSTRUMENT)

1. Turn OFF the instrument by means of the ON/OFF key, insert the HOT-KEY and then turn the unit ON.

2. Automatically the parameter list of the HOT-KEY is downloaded into the controller memory: the doL message is blinking. After 10 seconds the instrument will restart working with the new parameters. At the end of the data transfer phase the instrument displays the following messages: End for right programming. The instrument starts regularly with the new programming. Err for failed programming. In this case turn the unit off and then on if you want to restart the download again or remove the HOT-KEY to abort the operation.

15.2 UPLOAD (FROM THE INSTRUMENT TO THE HOT-KEY)

1. When the XM unit is ON, insert the HOT-KEY and push “UP” key

2. The UPLOAD begins; the uPL message is blinking.

3. Remove the HOT-KEY. At the end of the data transfer phase the instrument displays the following messages:

End = right programm ing; Err = failed programming. In this case push SET key if you want to restart the

programming again or remove the not programm ed HOT-KEY.

16. CONTROLLING LOADS

16.1 THE COOLING OUTPUT

The regulation is performed according to the temperature measured by the thermostat probe that can be physical probe or virtual probe obtained by a weighted average between two probes following the formula:

value_for_room_regulation = (rPA*rPE + rPb*(100-rPE))/100

If the temperature increases and reaches set point plus differential the solenoid valve is opened and then it is closed when the temperature reaches the set point value again. In case of fault in the thermostat probe the opening and closing time of solenoid valve is configured by Con and CoF parameters.

16.2 STANDARD REGULATION AND CONTINUOUS REGULATION

The temperature regulation can be performed in t hree ways: the goal of the first way (standard regulation) is reaching the best superheat via a cl assic temperature regulation obtained using hysteresis. The second way permits to use the valve to realize an high performance temperature regulation with a g ood factor of superheat precision. This second possibility, it can be used only in centralized plants and it is available only with electronic expansion valve by selecting [CrE = Y] parameter. The third kind of regulation has been thought to be used with vales called e vaporator valves [CrE = EUP], in this configuration the valve is placed at the end of the evaporator. In a ny case, the regulation is performed via PI regulator that gives the opening percentage to the valve.

Standard regulation: [CrE = n]

In this case, the HY parameter is the differential for standard ON/OFF regulation. In this case the int parameter is neglected.

Continuous regulation: [CrE = Y]

In this case, the HY parameter is the proportional band of PI in charge of room temperature regulation and we advise to used at least [HY = 6.0°C/12°F]. The int parameter is the integral time of the same PI regulator. Increasing int parameter the PI regulator become slowly in reaction and of course is true vice versa. To disable the integral part of regulation you should set [int = 0].

Evaporator valves: [CrE = EUP]

In this case, the system perform s a regulation of the temperature without taking in consideration the superheat (in fact the valve is at the end of the evaporator). The HY parameter is the proportional band for the temperature regulation and int is the integral time for the regulation. The proportional action is perform ed only when the compressor relay is on. In this situation there is no superheat regulation.

16.3 DEFROST

Defrost starting In any case, the device check the temperature read by configured defrost probe before starting defrost procedure, after that:

- (If RTC is present)Two defrost modes are available through t he tdF parameter: defrost with electrical heater and hot gas defrost. T he defrost interval is controlled by parameter EdF: (EdF = rtC) defrost is made in real time depending on the hours set in the parameters Ld1 to Ld6 in workdays a nd in Sd1 to Sd6 on holidays; (EdF = in) the defrost is made every IdF time.

- Defrost cycle starting can be operated l ocally (manual activation by means of the keyboard or digital input or end of interval tim e) 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 programm ed but, at the end of the drip time, will wait that all the other controllers of the LAN finish their defrost cycle before to restart the normal regulation of the temperature according to dEM parameter.

- Every time any of the controller of the LAN begin a defrost cycle it issue the command into 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.

Defrost ending

- When defrost is started via rtC, the m aximum duration of defrost is obtained from Md parameter and the defrost end temperature is obtained from dtE parameter

- If dPA is present and [d2P = Y], the instrument stops the defrost procedure when dPA is higher than dtE temperature.

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

16.4 FANS

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

C-n = running with the solenoid valve, OFF during the defrost; C-Y = running with th1e solenoid valve, ON during the defrost; O-n = continuous mode, OFF during the defrost; O-Y = continuous mode, ON during the defrost.

An additional parameter FSt provides the setting of temperature, detected by the evaporator probe, above which the fans are always OFF. T his can be used to make sure circulation of air only if his temperature is lower than set in FSt.

CONTROL WITH ANALOG OUTPUT (if present)

1592023140 XM678D GB r2.8 01.09.2017.docx XM678D 8/15

The modulating output [trA = rEG] works in proportional way (excluding the first AMt seconds where the fans speed is the maximum. The regulation set point is relative to regulation set point and is indicated b y ASr, the proportional band is always located above [SET + ASr] value and its value is PbA. The fans are at minimum speed AMi when the temperature read by fan probe is [ SET +

ASr] and the fan is at maximum speed (AMA) when the tem perature is [SET + ASr + PbA].

16.5 ANTI SWEAT HEATERS

The anti-sweat heater regulation can be performed with on board relay (if OA6 = AC) or with the analog output (if present by setting trA = AC). However the regulation can be performed in two ways:

 Without real dew-point information: in this case the default value for dew-

point is used (SdP parameter).

 Receiving dew-point from XWEB5000 system: the SdP p arameter is

overwritten when valid value for dew-point is received from XWEB. In case of XWEB link is lost, SdP is the value that will be used for safety.

The best performance can be obtained using probe 4. In this case, the regulation follows the chart:

Probe 4 should be placed on the showcase glass. For each cabinet can be used only one probe 4 (P4) sending its value to the others section that are connected to the LAN.

HOW TO WORK WITH PROBE 4 THROUGH THE LAN:

Param.

XM6x8D_1

Without probe 4

XM6x8D_2 +

with

probe 4

XM6x8D_3+

Without probe 4

Adr

n n + 1 n + 2

LCP

LCP = n LCP = Y LCP = n

P4C

LAN or not

connect the probe

P4C = NTC, PtC or

PtM

LAN or not connect

the probe

trA

trA = AC if the device has the analog output

OA6

OA6 = AC if the device will use the AUX relay for regulation

HOW TO WORK WITHOUT PROBE 4:

Param.

XM6x8D

Without probe 4

P4C

AMt

% of ON

In this case, the regulation is perform ed by

switching on and off the auxiliary rela y on a

60 minutes time base. The ON time will be the AMt value, so that the relay will be ON

for AMt minutes and OFF for [60- AMt]

minutes.

In case of P4 error or if P4 is absent the output is at AMA value for the AMt time then the output is at 0 value for the time [255 – AMt] time performing a simple PWM modulation.

16.6 AUXILIARY OUTPUT

The auxiliary output is switch ON and OFF by means of the corresponding digital input or by pressing and releasing the down arrow key.

17. TECHNICAL DATA

CX660 keyboard Housing: self extinguishing ABS Case: CX660 fascia 35x77 mm; depth 18mm Mounting: panel mounting in a 29x71 mm panel cut-out Protection: IP20

Frontal protection: IP65 Power supply: from XM600 power module Display: 3 digits, red LED, 14.2 mm high Optional output: buzzer

Power modules Case: 8 DIN Connections: Screw terminal block  1.6 mm2 heat-resistant wiring and 5.0mm fast-

on or screw terminals.

Power supply: 24Vac Power absorption: 20VA max. Inputs: up to 6 NTC; PTC; Pt1000 probes. Max cable length 15m Digital inputs: 3 free of voltage. Max cable length 15m Relay outputs: Total current on loads MAX. 16A.

Solenoid Valve: relay SPST 5A, 250Vac Defrost: relay SPST 16A, 250Vac Fan: relay SPST 8A, 250Vac Light: relay SPST 16A, 250Vac Alarm: SPDT relay 8A, 250Vac

Aux: SPST relay 8A, 250Vac Outputs for valve: bipolar or unipolar valves. Max distance between controller and valve: up to 10m with shilded twisted cables,

AWG 18 (0.823mm

) or less.

Max length for LAN:: up to 30m with shilded twisted cables, AWG 20 (0.51mm

) or

less.

Optional output (AnOUT) DEPENDING ON THE MODELS:

 PWM / Open Collector outputs: PWM or 12Vdc max 40mA  Analog output: 4 to 20mA or 0 to 10V

Serial output: RS485 with ModBUS - RTU and LAN Data storing: on the non-volatile m emory (EEPROM) Kind of action: 1B; Pollution degree: 2 Software class: A Operating temperature: -10 to 60°C (14 to 140°F) Storage temperature: -25 to 60°C (-13 to 140°F) Relative humidity: 20 to 85% (no condensing) Measuring and regulation range: NTC probe: -40 to 110°C (-58 to 230°F)

PTC probe: -50 to 150°C (-67 to 302°F) Pt1000 probe: -100 to 100°C (-148 to 212°F)

Resolution: 0.1°C or 1°C or 1°F (selectable). Accuracy (ambient temp. 25°C): ±0.5 °C ±1 digit.

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18. DEFAULT PARAMETER MAP

The numbers of the first column are simple indexes that are unrelated to the position on the device menu. The total amount of parameters can be different depending on the applications. SUBMENUS: the parameters O1...O24 of the clock belongs to rtC label; V1...V30 ELECTRONIC VALVE belongs to EEV.

LABEL VALUE DESCRIPTION RANGE NOTES

rtC

CLOCK AND DEFROST

By pressing SET

it’s possible to enter on RTC submenu

Access to CLOCK submenu (if present)

CbP - - -

RTC presence - - -

Y = the optional RTC board is used. N = the optional RTC board is not used even if mounted

Hur - - -

Hours. - - - -

Min - - -

Minutes. - - - -

dAY - - -

Day of the week. Sun(0); SAt(6) -

Hd1 nU

First weekly day. Sun(0); SAt(6); nu(7) Set the first day of the week which follows the holiday times.

Hd2 nU

Second weekly day. Sun(0); SAt(6); nu(7) Set the second day of the week which follows the holiday times.

Hd3 nU

Third weekly day. Sun(0); SAt(6); nu(7) Set the third day of the week which follows the holiday times.

iLE 0.0

Energy saving cycle start during workdays.

0.0 to 23h50min (143)

During the Energy Sa ving c ycle the set point is increased by the value in HES so that the operation set point is [SET + HES].

Format: hours.10min, resolution: 10min.

dLE 0.0

Energy saving cycle length during workdays.

0.0 to 24h00min (144)

Set the duration of the Energy Saving c ycle on workdays.

Format: hours.10min, resolution: 10min.

iSE 0.0

Energy saving cycle start during holida ys. 0.0 to 23h50min (143)

Format: hours.10min, resolution: 10min.

dSE 0.0

Energy saving cycle length during holidays.

0.0 to 24h00min (144)

Format: hours.10min, resolution: 10min.

HES 0.0

Temperature increasing during Energy Saving cycle (Day/Night).

[-30.0°C to 30.0°C]

[-54°F to 54°F]

Set the increasing value of the set-point during the Energy Saving cycle.

Ld1 6.0

Workdays First defrost start.

0.0 to 23h50min (143) nU(144)

Workdays defrost start: [Ldn to 23h50min] these parameters set the beginning of the eight programmable defrost cycles during workdays. Ex: when [Ld2 = 12.4] the second defrost starts at 12.40 during workdays.

nU = not used. Format: hours.10min, resolution: 10min.

Ld2 13.0

Workdays Second defrost start.

Ld1 to 23h50min (143)

nU(144)

Ld3 21.0

Workdays Third defrost start.

Ld2 to 23h50min (143)

nU(144)

Ld4 nU

Workdays Fourth defrost start.

Ld3 to 23h50min (143)

nU(144)

Ld5 nU

Workdays Fifth defrost start.

Ld4 to 23h50min (143)

nU(144)

Ld6 nU

Workdays Sixth defrost start.

Ld5 to 23h50min (143)

nU(144)

Sd1 6.0

Holidays First defrost start.

0.0 to 23h50min (143) nU(144)

Holidays defrost start: [Sdn to 23h50min] t hese parameters set the beginning of the eight programmable defrost cycles on holidays. Ex: when [Sd2 = 3.4] the second defrost starts at 3.40 on holidays.

nU = not used. Format: hours.10min, resolution: 10min.

Sd2 13.0

Holidays Second defrost start.

Sd1 to 23h50min (143)

nU(144)

Sd3 21.0

Holidays Third defrost start.

Sd2 to 23h50min (143)

nU(144)

Sd4 nU

Holidays Fourth defrost start.

Sd3 to 23h50min (143)

nU(144)

Sd5 nU

Holidays Fifth defrost start.

Sd4 to 23h50min (143)

nU(144)

Sd6 nU

Holidays Sixth defrost start.

Sd5 to 23h50min (143)

nU(144)

Lo1

Workdays First light switch.

0.0 to 23h50min (143) nU(144)

Format: hours.10min, resolution: 10min.

Lo2

Workdays Second light switch.

Lo1 to 23h50min (143)

nU(144)

Lo3

Workdays Third light switch.

Lo2 to 23h50min (143)

nU(144)

Lo4

Workdays Fourth light switch.

Lo3 to 23h50min (143)

nU(144)

Lo5

Workdays Fifth light switch.

Lo4 to 23h50min (143)

nU(144)

Lo6

Workdays Sixth light switch.

Lo5 to 23h50min (143)

nU(144)

dLo 0.0

Light on time during workdays. 0.0 to 24h00min (144)

Set the duration of the light on time on workdays.

Format: hours.10min, resolution: 10min.

So1

Holidays First light switch.

0.0 to 23h50min (143) nU(144)

Format: hours.10min, resolution: 10min.

So2

Holidays Second light switch.

So1 to 23h50min (143)

nU(144)

So3

Holidays Third light switch.

So2 to 23h50min (143)

nU(144)

So4

Holidays Fourth light switch.

So3 to 23h50min (143)

nU(144)

So5

Holidays Fifth light switch.

So4 to 23h50min (143)

nU(144)

So6

Holidays Sixth light switch.

So5 to 23h50min (143)

nU(144)

dSo 0.0

Holidays Sixth defrost start. 0.0 to 24h00min (144)

Set the duration of the light on time on holida ys.

Format: hours.10min, resolution: 10min.

EEU

ELECTRONIC VALVE

By pressing SET you can enter electronic expansion valve submenu.

1592023140 XM678D GB r2.8 01.09.2017.docx XM678D 10/15

LABEL VALUE DESCRIPTION RANGE NOTES

FtY

404

Kind of gas.

Type of gas used by plant.

Fundamental parameter for correct functioning of all system.

LABEL

REFRIGERANT

OPERATING RANGE

R22

r22 -50-60°C/-58÷120°F

134

r134A -50-60°C/-58÷120°F

290

r290 – Propane -50-60°C/-58÷120°F

404

r404A -70-60°C/-94÷120°F

47A

r407A -50-60°C/-58÷120°F

47C

r407C -50-60°C/-58÷120°F

47F

r407F -50-60°C/-58÷120°F

410

r410A -50-60°C/-58÷120°F

448

r448A -45-60°C/-69÷120°F

449

r449A -45-60°C/-69÷120°F

450

r450A -45-60°C/-69÷120°F

507

r507 -70-60°C/-94÷120°F

513

r513A -45-60°C/-69÷120°F

CO2

r744 - Co2 -50-60°C/-58÷120°F

Atu

Minimum STABLE superheat search No; yES

This parameter enables the search of the minimum stable superheat. The lowest admitted value is LSH+2°C

AMS

Self self adaptive SH regulation enabling No; yES

This parameter enables the self adaptive regulation of the superheat. CrE = no must to be set, when this function is enabled.

SSH

8.0

Superheat set point.

[0.1°C to 25.5°C]

[1°F to 45°F]

This is the value used to regulate superheat.

8,0

Proportional band.

[0.1°C to 60.0°C]

[1°F to 108°F]

The valve changes its opening on the band

[SSH, SSH + Pb]

. At

SSH value o f superheat the valve wi ll be at 0% (without integral contribution) and at [SSH + Pb] value of superheat the valve will be at MnF. For values bigger than [SSH + Pb] the valve is completely opened.

0.0

Proportional band reset [-12.0°C to 12.0°C]

It allows to m ove the regulation band, above or below the SH set point.

inC

200

Integration time for superheat regulation. 0 to 255s -

PEO

Valve opening in case of error on probes P5 or P6.

0 to 100%

If a temporary probe error occurs, valve opening percentage is

PEo

until PEd time is elapsed.

OPE

Start opening percentage for the time

SFd

It’s not limited by the MnF parameter

0 to 100%

Opening valve percentage when start function is active. This phase duration is SFd time.

SFd

0.1

Duration of soft start phase with opening at OPE.

0.0 to 42min00sec (252)

Set start function duration and post

defrost duration.

During this

phase the alarms are neglected. Format: min.10sec, resolution: 10sec.

OPd

Valve opening percentage during hot gas defrost. It’s not limited by the MnF parameter.

0 to 100%

Opening valve percentage during hot gas defrost. During hot gs defrost there is not SH control.

MnF

100

Maximum percentage of opening admitted (during normal functioning).

0 to 100%

During regulation it sets the maximum valve opening percentage.

This value is not used during the SFd phase (soft start) and during hot gas defrost, where the fixed percentace of the valve opening is set by oPd.

Fot

Manual opening.

0 to 100%

It perm its to force the valve opening to the specified value. This value overwrites the one calculated by PID algorithm.

!!!! WARNING !!!! It must be [Fot = nU] to have correct superheat regulation.

PA4

-0.5

Probe value at 4mA or at 0V.

Meas Unit

Range

BAR

[PrU=rE] -1.0 to P20 [PrU=Ab] 0.0 to P20

PSI

[PrU=rE] -14 to P20 [PrU=Ab] 0 to P20

dKP

[PrU=rE] -10 to P20 [PrU=Ab] 0 to P20

Value of pressure at 4mA for current probe [4 to 20mA] or value at 0V for ratiometric probes. The value is absolute or relative according to PrU parameter.

P20

11.0

Probe value at 20mA or at 5V.

Meas Unit

Range

BAR

[PrU=rE] PA4 to 60.0 [PrU=Ab] PA4 to 60.0

PSI

[PrU=rE] PA4 to 870 [PrU=Ab] PA4 to 870

dKP

[PrU=rE] PA4 to 600 [PrU=Ab] PA4 to 600

Value of pressure at 20mA for current probe [ 4 to 20m A] or value at 5V for ratiometric probes. The value is absolute or relative according to PrU parameter.

LPL

-0.5

Lower Pressure Limit for superheat regulation.

PA4 to P20

EXPERT:

when suction pressure goes down the lower bound

LPL,

superheat regulation will use a fixed pressure value. Otherwise, the normal pressure value will be used (according to PrU parameter).

MOP

11.0

Maximum operating pressure threshold and valve closing of dML value.

LOP to P20

If suction pressure exceeds maximum operating pressure value, the instrument will signal this situation giving the MOP alarm (according to PrU parameter).

LOP

-0.5

Minimum operating pressure threshold and valve opening of dML value.

PA4 to MOP

If suction pressure exceeds minimum operating pressure value, the instrument will signal this situation giving the LOP alarm (according to PrU parameter).

dML

Delta [MOP - LOP].

0 to 100%

Until

MOP

alarm is active, the valve will close, every

second

, of a

value equal to the dML percentage. Until LOP alarm is active, the valve will open, every second, of a value equal to the dML percentage.

MSH

60.0

Maximum superheat alarm threshold.

[LSH to 80.0°C]

[LSH to 144°F]

If superheat value exceeds

MSH

value, the display will show the

MSH message until delay time SHd will expire.

1592023140 XM678D GB r2.8 01.09.2017.docx XM678D 11/15

LABEL VALUE DESCRIPTION RANGE NOTES

LSH

2.0

Minimum superheat alarm threshold.

[0.0°C to MSH]

[0°F to MSH]

If the superheat value is lower than

LSH

during the

SHd

delay time,

then the display will show the m essage LSH. As soon as the

superheat value is lower than LSH value, the valve will close immediately, without waiting the SHd delay time (to avoid evaporator flooding).

SHY

1.0

Hysteresis for superheat alarm recovery [MSH – SHY] and [LSH + SHY].

[0.1°C to 25.5°C]

[1°F to 45°F]

SHd

3.0

Delay of superheat alarm signaling. 0.0 to 42min00sec (252)

If a superheat alarm occurs, the delay time

SHd

will have to expire

before the controller shows an alarm.

Format: min.10sec, resolution: 10sec.

FrC

Integration additive constant (Fastrecovery).

0 to 100s

It permits to d

ecrease faster the integral action when

value is

below the set-point. With higher values the valve closes faster. If [FrC = 0] fast recovery function is disabled.

Sub

Number of pressure values used to calculate the average pressure

0÷100

It uses the l ast average values of the pressure to calculate the superheat.

SLb

0.0

Reaction time 0÷255s

0 = controller calculates automatically the time to update the val ve position. 1÷255s = controller updates valve position every SLb seconds

tEP

Predefined valve selection. nU to 10

See par. 6.3.

nU = manual setting.

tEU

Kind of valve. uP; bP

= unipolar valve (5

6 wires);

bP = bipolar valve (4 wires).

HSF

FUL

Kind of motor movement HAF; FUL

HAF

= half step. Use this setting for the unipolar valve.

FUL = half step. Use this setting for the bipolar valve.

LSt

Minimum number of steps where the valve can be considered as completely closed.

0 to USt (* 10) For manual adjusting of the valve.

USt

Maximum number of steps that can be performed.

LSt to 800 (* 10) For manual adjusting of the valve.

ESt

Extra steps in closing phase 0 to 255(*10)

Extra steps done by the valve during closing phase to assure the valve closes completely

Step rate: is the speed to change step. A too high value causes a wrong driving.

10 to 600 (steps/sec) For manual adjusting of the valve.

CPP

Current per phase during bipolar valve driving.

0 to 100 (* 10mA) For manual adjusting of the valve.

CHd

Current per phase to maintain the actual position (Holding current).

0 to 100 (* 10mA) For manual adjusting of the valve.

GtH

0.0

Autozero function 0÷15h

To prevent any possible wrong position caused by a long period without closing the valve, the controller after gtH hours, as soon as the opening open percentage is under 20%, will force complete closer of the valve, and then will restart working.

REGULATION

SET -5.0

Set point LS÷US Target set point for temperature regulation

Differential.

[0.1°C to 25.5°C]

[1°F to 45°F]

[CrE = n]

then HY

is the hysteresis for ON/OFF thermoregulation.

If [CrE = Y] or [CrE = EUP] then HY is the prop ortional band for temperature PI controller. On these cases the value should be greater than 5°C.

int

150

Integral time for room temperature regulation.

0 to 255s

This value is used only when

[CrE = Y]

[CrE = EUP]

. It’s the

integral time for thermoregulation: high values mean slower regulation.

0 (zero) = no integral action.

CrE

Continuous regulation activation. n(0); Y(1); EUP(2)

With

[CrE = Y]

[CrE = EUP]

the regulation become

PI, HY

become a band and int an integral time. n = standard regulation; Y = continuous regulation, to be used onl y in centralized plants; EUP = evaporator valves (see par. 16.2).

-30.0

Minimum set point.

[-55.0°C to SET]

[-67°F to SET]

Set the minimum acceptable value for the set-point.

20.0

Maximum set point.

[SET to 150.0°C]

[SET to 302°F]

Set the maximum acceptable value for the set-point.

odS

Outputs activation delay at start up. 0 to 255min

This function is enabled at the initial start up of the instrument and inhibits any output activation for the period of time set in this parameter (N.B.: AUX and Light can work).

Anti-short cycle delay. 0 to 60min Interval between the solenoid valve stop and the following restart.

CCt

0.0

Continuous cycle duration. 0.0 to 24h00min (144)

Compressor ON time during continuous cycle:

allows to set the

length of the continuous cycle: compressor stays on without interruption for the CCt time. It can be used, for instance, when the room is filled with new products.

Format: hours.10min, resolution: 10min.

CCS

0.0

Continuous cycle set point.

[-55.0°C to 150.0°C]

[-67°F to 302°F]

Set point for continuous cycle:

used value during the continuous

cycle.

Con

Compressor ON time with faulty probe. 0 to 255min

Solenoid valve ON time with faulty probe:

time during which the

solenoid valve is active in case of fault y th ermostat probe. With

COn = 0 solenoid valve is always OFF.

CoF

Compressor OFF time with faulty probe. 0 to 255mi n

Solenoid valve OFF time with faulty probe:

time during which

the solenoid valve is off in case of faulty thermostat prob e. With

COF = 0 solenoid valve is always active.

°C

Temperature measurement unit. °C(0); °F(1)

°C

Celsius;

°F = Fahrenheit. !!! WARNING !!! When the m easurement unit changes, all parameters with temperature values will have to be checked.

PrU

Pressure Mode. rE(0); Ab(1)

It defines the mode to evaluate the pressure values. !!! WARNING !!! PrU value is used for all the pressure parameters. If [PrU = rE] all pressure parameters are in relative pressure unit, if [PrU = Ab] all pressure parameters are in absolute pressure unit.

1592023140 XM678D GB r2.8 01.09.2017.docx XM678D 12/15

LABEL VALUE DESCRIPTION RANGE NOTES

PMU

Bar

Pressure measurement unit. bAr(0); PSI(1); MPA(2)

It selects the pressure measurement units.

means the value

of pressure measured by kPA*10.

PMd

PrE

Pressure probe visualization tEM, PrE

It selects the

visualization of pressure probe (P5):

tEM =

temperature; PrE = pressure

rES

Resolution (only °C). dE; in

It sets decimal point display.

in = 1°C; dE = 0.1 °C.

Lod

tEr

Local display: default display.

nP(0); P1(1); P2(2); P3(3); P4(4); P5(5);

P6(6); tEr(7); dEF(8)

It selects which probe is displayed by the instrument.

nP = no probe; P1, P2, P3, P4, P5, P6, tEr = virtual probe for therm ostat; dEF = virtual probe for defrost.

rEd

tEr

Remote display: default display.

nP(0); P1(1); P2(2); P3(3); P4(4); P5(5);

P6(6); tEr(7); dEF(8)

It selects which probe is displayed by the X-REP.

nP = no probe; P1, P2, P3, P4, P5, P6, tEr = virtual probe for therm ostat; dEF = virtual probe for defrost.

dLY

0.0

Display delay. 0.0 to 24h00min (144)

When the temperature changes, the display will be updated of 1°C / 1°F when delay time expires.

Format: min.10sec, resolution: 10sec.

rPA

Regulation probe A.

nP(0); P1(1); P2(2);

P3(3); P4(4); P6(5)

First probe used to regulate room temperature. If

[rPA = nP]

the

regulation is performed with real value of rPb.

rPb

Regulation probe B.

nP(0); P1(1); P2(2);

P3(3); P4(4); P6(5)

Second probe used to regulate room temperature. If

[rPb = nP]

the

regulation is performed with real value of rPA.

rPE

100

Virtual probe percentage (room temperature).

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

DEFROST

dPA

Defrost probe A.

nP(0); P1(1); P2(2);

P3(3); P4(4); P6(5)

First probe used for defrost. If

[dPA = nP]

the regulation is

performed by time

dPb

Defrost probe B

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

P4(4) - P5(5)

Second

probe used for defrost. If

[dPb

= nP]

the regulation is

performed with dPA.

dPE

100

Percentuale prima sonda sbrinamento

0 ÷ 100 (100=dPA, 0=dPb)

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))/10 0

tdF

Defrost kind. EL; in

= defrost with electrical heater;

in = hot gas defrost. NOTE: The valve opening percentageduring the defrost is set by the par. oPd.

EdF

Defrost mode. rtC; in

rtC =

defrost activation via RTC with

Ld1, Ld2

... parameters;

in = defrost activation with idF parameter.

dtE

8.0

End defrost temperature on probe A (dPA).

[-55.0°C to 50.0°C]

[-67°F to 122°F]

Set the temperature measured by the evaporator probe

dPA

which

stops the defrost. N.B.: parameter enabled only when the

evaporator probe is present.

idF

Defrost interval. 0 to 120hours

It sets the time interval between the beginning of two defrost cycles.

[EdF = in]: it is the interval between 2 defrost; [EdF = rtC]: it is the safety interval in case of clock alarm [RtC – RtF]. [idF = 0]: the defrost can be activated onl y manuall y, or through

RS485 or from external contact or from LAN.

MdF

(Maximum) duration for defrost. 0 to 255min

When

dPA

in not present, it sets the defrost d

uration, otherwise it

sets the maximum duration for defrost.

dSd

Defrost start delay after request. 0 to 255mi n

Useful when different defrost start times are necessary to avoid overloading the plant.

dFd

Display during defrost. rt; it; SEt; dEF

= real temperature for

Lod

probe;

it = initial temperature (reading when defrost start); SEt = set-point value; dEF = “dEF” label is visualized.

dAd

Display delay. 0 to 255min

Set the maximum time between the end of defrost and the restarting of the real room temperature display.

Fdt

Drain down time after defrost. 0 to 255min

Time interval between reaching defrost termination temperature and the restoring of the control’s normal operation. This time allows the evaporator to eliminate water drops that might have formed due to defrost. The fan and the thermoregulation output are OFF during this time.

dPo

Defrost at power-on. n; Y

First defrost after start-up:

Y = Immediately; n = after the idF time.

dAF

0.0

Defrost delay after continuous cycle. 0.0 to 24h00min (144)

Time interval between the end of the fast freezing cycle and the following defrost related to it.

Format: hours.10min, resolution: 10min.

FAN

FPA

Fan probe A

nP(0); P1(1); P2(2);

P3(3); P4(4); P6(5)

First probe used for fan. If

[FPA = nP]

the regulation

is performed

with real value of FPb.

FnC

O-n

Fan operating mode. C-n; C-Y; O-n; O-Y

C-n

= running with the solenoid valve, OFF during the defrost;

C-Y = running with the 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 255min

The time interval between the ending of the defrost and the starting of the evaporator fans.

FCt

Temperature differential to avoid short cycles of fans.

[0.0°C to 50.0°C]

[0°F to 90°F]

If th e difference of temperature between the evaporator and the room probes is more than the value of the FCt parameter, the fans will start.

FSt

2.0

Fan stop temperature.

[-55.0°C to 50.0°C]

[-67°F to 122°F]

Evaporator probe temperature above which the fan is always OFF.

FHY

1.0

Fan stop differential

[0.1°C to 25.5°C]

[1°F to 45°F]

When stopped, fan restarts when fan probe reaches

[FSt –

FHY]

value of temperature.

tFE

Fan thermostat also during defrost n; Y

n =

fan follows FnC setting during defrost without temperature

control y = fan follows FnC setting during defrost with FSt temperature control

1592023140 XM678D GB r2.8 01.09.2017.docx XM678D 13/15

LABEL VALUE DESCRIPTION RANGE NOTES

Fod

Fan activation time after defrost (without compressor)

0 to 255min It forces fan activation for the indicated time.

Fon

Fan ON time 0 to 15min

With

[FnC = C

C-Y]

(fan activated in parallel with compressor),

it sets the evaporator fan ON cycling time when the compressor is off. With [Fon = 0] and [FoF ≠ 0] the fan is always off, with [Fon =

0] and [FoF = 0] the fan is always off.

FoF

Fan OFF time 0 to 15min

With

[

FnC = C

C-Y]

(fan activated in parallel with compressor)

it sets the evaporator fa n off cycling tim e 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.

trA

UAL

Kind of PWM regulation UAL; rEG; AC

PWM output if

CoM

value is different from

OA7

UAL = the output is at FSA value (manual value); rEG = the output is regulated with fan algorithm described in fan

section;

AC = anti-sweat heaters control (require XWEB5000 system).

SOA

Manual value of the analog output AMi to AMA

Value for the output if [trA = UAL] (0 to 100%).

SdP

30.0

Default Dew-Point value (or safety value in case of XWEB link lost)

[-55.0°C to 50.0°C]

[-67°F to 122°F]

Default value of dew-point used when there is no supervising system (XWEB5000). Used only if [tr A = AC].

ASr

1.0

Differential for fan / offset for anti sweat heater.

[-25.5°C to 25.5°C]

[-45°F to 45°F]

trA = AC:

dew-point offset;

trA = rEG: differential for modulating fan regulation.

PbA

5.0

Proportional band for modulating output.

[0.1°C to 25.5°C]

[1°F to 45°F]

Differential for anti-sweat heaters.

AMi

Minimum output for modulating output. 0 to AMA

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

AMA

100

Maximum output for modulating output. AMi to 100

Maximum value for analog output: (AMi to 100).

AMt

Time with fan at maximum speed or ON time for relay on Anti-sweat regulation.

[10 to 60s] or

[10 to 60min]

trA = AC:

Anti-sweat heaters

cycle period

;

trA = rEG: Time with fan at maximum speed.

During this time the fan works at ma ximum speed. If intended for fan, the basetime is on seconds, for anti-sweat regulation the basetime is on minutes.

ALARM

rAL

tEr

Probe for room temperature alarm. nP; P1; P2; P3; P4; P6; tEr It selects the probe used to signal alarm temperature.

ALC

Room temperature alarm configuration: relative to set point or absolute.

rE; Ab

= High an

d Low alarms related to set

point;

Ab = High and low alarms related to the absolute temperature.

ALU

15.0

High room temperature alarm setting.

[0.0°C to 50.0°C] or

[ALL to 150.0°]

ALC = rE:

[0.0°C to



50°C] or [32°F to 90°F];

ALC = Ab: [ALL to 150°C] or [ALL to 302°F]. When this temperature is reached and after the ALd delay time is expired, the HA alarm will be enabled.

ALL

15.0

Low room temperature alarm setting.

[0.0°C to 50.0°C] or

[-55.0°C to ALU]

ALC = rE:

[0.0°C to



50.0°C] or [32°F to 90°F];

ALC = Ab: [-55.0°C to ALU] or [-67°F to ALU]. After this temperature is reached and the ALd delay time is expired, the LA alarm will be enabled.

AHY

1.0

Differential for room temperature alarm.

[0.1°C to 25.5°C]

[1°F to 45°F]

Threshold recovery after a temperature alarm .

ALd

Room Temperature alarm delay. 0 to 255min

Time interval between the detection of an alarm condition and the corresponding alarm signali ng.

dLU

150

High temperature alarm detected by defrost probe

[dLL ÷ 150.0°] [dLL ÷ 302°F]

When this temperature is reached and after the

delay tim

e is

expired, the HAd alarm will be enabled.

dLL

-50.0

Low room alarm detected by defrost probe.

[-55,0°C ÷ dLU] [-67°F ÷

dLU°F]

When this temperature is reached and the ddL delay time is expired, the LAd alarm will be enabled.

dHY

1.0

Differential for temperature alarm detected by defrost probe.

[0.1°C ÷ 25.5°C] [1°F ÷ 45°F]

Threshold recovery after a temperature alarm .

ddA

Delay of temperature alarm detected by defrost probe.

0 ÷ 255 (min.)

Time interval between the detection of an alarm condition and the corresponding alarm signali ng.

FLU

150

High temperature alarm detected by fan probe

[FLL ÷ 150.0°] [FLL ÷ 302°F]

Whe

n this temperature is reached and after the

FAd

delay time is

expired, the HAF alarm will be enabled.

FLL

-50.0

Low room alarm detected by fan probe.

[-55,0°C ÷ FLU] [-67°F ÷

FLU°F]

When this temperature is reached and the FAd delay time is expired, the FAd alarm will be enabled.

FHY

1.0

Differential for temperature alarm detected by fan probe.

[0.1°C ÷ 25.5°C] [1°F ÷ 45°F]

Threshold recovery after a temperature alarm .

FAd

Delay of temperature alarm detected by fan probe.

0 ÷ 255 (min.)

Time interval between the detection of an alarm condition and the corresponding alarm signali ng.

dAo

1.3

Delay of temperature alarm at start-up. 0.0 to 24h00min

After p owering on the instrument: time interval between the detection of the temperature alarm condition and the alarm signaling. Format: hours.10min, resolution: 10min.

EdA

Alarm delay at the end of defrost. 0 to 255min

At the end of the defrost cycle: time interval between the detection of the temperature alarm condition and the alarm signaling.

dot

Temperature alarm exclusion after door open.

0 to 255min -

Sti

Stop regulation interval.

0.0 to 24h00min; nU

After regulating continuously for

Sti

time, the valve closes for

Std

time in order to prevent ice creation.

Format: hours.10min, resolution: 10min.

Std

Stop duration. 1 to 255min

It defines stop regulation time after Sti.

nMS

Maximum number of regulation pauses. "nu"(0) ÷ 255 -

tbA

Silencing alarm relay by pressing a key. n; Y -

OUTPUT CONFIGURATION:

OA1

CPr

Relay on terminals 11-12 configuration

nU; CPr; dEF;

FAn; ALr; LiG;

AUS; db; onF; AC

= not used;

CPr

= compressor / valve;

dEF

= defrost;

FAn = Fan; ALr = Alarm; LiG = Light; AUS = auxiliary; db = heater for neutral zone (not available with CrE = Y); onF = ON/OFF; AC = anti-sweet.; E3r: Not set

OA6

AUS

Relay on terminals 17-18 configuration

nU; CPr; dEF;

FAn; ALr; LiG;

AUS; db; onF; AC

= not used;

CPr

= compressor / valve;

dEF

= defrost;

FAn = Fan; ALr = Alarm; LiG = Light; AUS = auxiliary; db = heater for neutral zone (not available with CrE = Y); onF = ON/OFF; AC = anti-sweet.; E3r: Not set

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LABEL VALUE DESCRIPTION RANGE NOTES

CoM

Cur

Modulating output configuration.

PM5; PM6; OA7;

CUr; tEn

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] or [0 to 10V] output:

- Cur = 4 to 20mA current output;

- tEn = 0 to 10V voltage output.

AOP

Alarm relay polarity. OP; CL

CL =

normally closed;

OP = normally opened.

iAU

Auxiliary output independent from ON/OFF state.

n; Y

n =

if the instrument is switched off also the

auxiliary output is

switched off; Y = the au xiliary output state is unrelated to th e ON/OFF device status.

DIGITAL INPUTS

i1P

Digital input 1 polarity. OP; CL

= the digital input is activated by closing the contact;

OP = the digital input is activated by opening the contact.

i1F

dor

Digital input 1 configuration.

EAL; bAL; PAL;

dor; dEF; AUS;

LiG; OnF; Htr;

FHU; ES; HdY

EAL =

external alarm;

bAL =

serious external alarm ;

PAL = pressure switch activation; dor = door open; dEF = defrost activation; AUS = auxiliar y activation; LiG = light activation; OnF = switch on/off the instrument; Htr = change type of action; FHU = not used; ES = activate energy saving; HdY = activate holiday function.

d1d

Digital input 1 activation delay. 0 to 255min

When

[i1F = PAL]

: time interval to calculate the number of the

pressure switch activation. When [i1F = EAL or b AL] (external alarm s): d1d parameter defines the time delay between t he detection and the success ive signaling of the alarm. When [i1F = dor]: this is the delay to activate door open alarm.

i2P

Digital input 2 polarity. OP; CL

means the digital input is activated by closing the contact;

OP means the digital input is activated by opening the contact.

i2F

LiG

Digital input 2 configuration.

EAL; bAL; PAL;

dor; dEF; AUS;

LiG; OnF; Htr;

FHU; ES; HdY

EAL =

external alarm;

bAL =

serious external alarm ;

d2d

Digital input 2 activation delay. 0 to 255min

When

[i2F = PAL]

: time interval to calculate the number of the

pressure switch activation. When [i2F = EAL or b AL] (external alarm s): d2d parameter defines the time delay between t he detection and the successive signaling of the alarm. When [i2F = dor]: this is the delay to activate door open alarm.

i3P

Digital input 3 polarity. OP; CL

means the digital input is activated by closing the contact;

OP means the digital input is activated by opening the contact.

i3F

Digital input 3 configuration.

EAL; bAL; PAL;

dor; dEF; AUS;

LiG; OnF; Htr;

FHU; ES; HdY

EAL =

external alarm;

bAL =

serious external alarm ;

d3d

Digital input 3 activation delay. 0 to 255min

When

[i3F = PAL]

: time interval to calculate the number of the

pressure switch activation. When [i3F = EAL or b AL] (external alarm s): d3d parameter defines the time delay between t he detection and the successive signaling of the alarm. When [i3F = dor]: this is the delay to activate door open alarm.

nPS

Number of pressure switch activations before lock.

0 to 15

Number of activation of the pressure switch, during the

d1d, d2d

and d3d interval, before signaling the alarm event [i1F, i2F or i3F = PAL]. If the nPS activation in the d1d, d2d or d3d time is

reached, switch off and on the instrum ent to restart normal regulation.

OdC

F-C

Compressor and fan status when open door.

no; FAn; CPr; F-C

= normal;

Fan

= Fan OFF;

CPr

= Compressor OFF;

F_C = both Compressor and Fan OFF.

rrd

Output restart delay with door open. 0 to 255min

The outputs stopped by the

OdC

parameter can restart after

rrd

time.

ENERGY SAVING

ESP P1

Energy saving probe selection. nP; P1; P2; P3; P4; P6; tEr

HES 0.0

Temperature increasing during Energy Saving.

[-30.0°C to 30.0°C]

[-54°F to 54°F]

Sets the increasing value of the set point during the Energy Saving cycle.

PEL nU

Energy saving activation when Light or/and AUX are switched off.

nU(0); LIG(1); AUS(2); LEA(3)

Energy saving enabled when:

- LiG: light switched off;

- AUS: AUX switched off;

- LEA: both light and AUX switched off. If nU then not used function.

LAN MANAGEMENT

LMd

Defrost Synchronization. n; Y

= the section doesn’t send a global defrost command;

Y = the section sends a command to start defrost to other controllers.

dEM

Defrost end Synchronization. n; Y

the end of the LAN defrosts are i

ndependent;

Y = the end of the LAN defrosts are synchronized.

LSP

LAN set-point Synchronization. n; Y

= the set

point value is modified only in the local section;

Y = the section set-point, when modified, is updated to t he same value on all the other sections.

LdS

LAN Display Synchronization (temperature sent via LAN).

n; Y

the set-point value is modified only in the local section;

Y = the value displa yed by the section is sent to all the other sections.

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LABEL VALUE DESCRIPTION RANGE NOTES

LOF

LAN ON/OFF Synchronization. n; Y

This parameter states if the On/Off command of the section will act on all the other ones too:

n = the On/Off command acts only in the local section; Y = the On/Off command is sent to all the other sections.

LLi

LAN Light Synchronization. n; Y

This parameter states if the light command of the section will act on all the other ones too:

n = the light command acts only in the local section; Y = the light command is sent to all the other sections.

LAU

AUX Synchronization. n; Y

This parameter states if the AUX command of the section will act on all the other ones too:

n = the light command acts only in the local section; Y = the light command is sent to all the other sections.

LES

Energy Saving Synchronization. n; Y

This parameter states if the energy saving command of the section will act on all the other ones too:

n = the Energy Saving command acts onl y in the local section; Y = the Energy Saving command is sent to all the other sections.

LSd

Remote probe displaying. n; Y

This parameter states if the section has to display the local probe value or the value coming from another section:

n = the displayed value is the local probe one; Y = the displayed value is the one coming from another section (which has parameter LdS = Y).

LPP

Pressure probe through the LAN. n; Y

n =

the value of pressure probe is read from local probe;

Y = the value of pressure probe is sent via LAN.

LCP

Probe 4 through the LAN. n; Y

StM

Cooling request from LAN enable compressor relay.

n; Y

n =

ot used;

Y = a generic cooling requests from LAN activate the solenoid valve connected to compressor relay.

ACE

Cooling request from LAN enable even if compressor is stopped by door switch

n; Y

n =

not used;

Y = a generic cooling requests from LAN activate the solenoid valve connected to compressor relay.

PROBE CONFIGURATION

NTC (10KΩ a 25°C), PtC (806Ω a 0°C)

P1C ntC

P1 configuration. nP; PtC; ntC; CtC; PtM

nP = not present; PtC = Ptc; ntC = ntc; CtC = ntc US PtM = Pt1000.

Ot 0

P1 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the thermostat probe.

P2C ntC

P2 configuration. nP; PtC; ntC; CtC; PtM

nP = not present; PtC = Ptc; ntC = ntc; CtC = ntc US PtM = Pt1000.

oE 0

P2 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the evaporator probe.

P3C nP

P3 configuration. nP; PtC; ntC; CtC; PtM

nP = not present; PtC = Ptc; ntC = ntc; CtC = ntc US PtM = Pt1000.

O3 0

P3 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the probe 3.

P4C nP

P4 configuration. nP; PtC; ntC; CtC; PtM; LAN

nP =

not present;

PtC =

Ptc;

ntC =

ntc;

tC =

ntc US

PtM =

Pt1000

;

LAN = value received from master.

O4 0

P4 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the probe 4.

P5C 420

P5 configuration.

nP; PtC; ntC; CtC;

PtM; 420; 5Vr; LAN

nP =

not present;

PtC =

Ptc;

ntC =

ntc;

tC =

ntc US;

PtM =

Pt1000; 420 = 4 to 20mA; 5Vr = 0 to 5V ratiometric; LAN = value received from master.

o5 0

P5 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the probe 5.

P6C PtM

P6 configuration. nP; PtC; ntC; CtC; PtM

nP = not present; PtC = Ptc; ntC = ntc; CtC = ntc US PtM = Pt1000.

o6 0

P6 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the probe 6.

SERVICE

CLt - - -

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

It shows the effecti ve cooling time calculated by XM600 during regulation (cooling time percentage).

tMd - - -

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

(read only)

It shows time before the next defrost when interval defrost is selected.

LSn Auto

Number of devices in LAN. 1 to 8 (read only) Shows the number of sections available in the LAN.

LAn Auto

List of address of LAN devices. 1 to 247 (read only)

Identifies the instrument address (

1 to LSn

) in

side local network of

multiplexed cabinet controller.

Adr 1

ModBUS address. 1 to 247

Identifies the instrument address when connected to a ModBUS compatible monitoring system.

rEL 2.8

Firmware release. (read onl y) Microprocessor firmware release.

Ptb - - -

Parameter table. (read only) It shows the original code of the Dixell parameter m ap.

Pr2 - - -

Pr2 menu access. (read onl y)

Access to the protected parameter list.

Emerson XM678D User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual