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dIXEL

IdF Interval between defrosts: (1÷120h) Determines the time interval between the beginning of two

defrost cycles.

MdF (Maximum) duration of defrost: (0÷255 min) When P2P = n, no evaporator probe, it sets the

defrost duration, when P2P = y, defrost end based on temperature, it sets the maximum length

for defrost.

dSd Start defrost delay: ( 0÷99min) This is useful when different defrost start times are necessary to

avoid overloading the plant.

dFd Display during defrost:

rt = real temperature;

it = temperature reading at the defrost start;

Set = set point;

dEF = "dEF" label;

dEG = "dEG" label;

dAd Defrost display time out: (0

255 min) Sets the maximum time between the end of defrost and

the restarting of the real room temperature display.

Fdt Drain down time: (0÷60 min.) 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.

dPo First defrost after start-up:

y = Immediately;

n = after the IdF time

dAF Defrost delay after fast freezing: (0min÷23h 50min) after a Fast Freezing cycle, the first

defrost will be delayed for this time.

OA3 = AUS: AUXILIARY THERMOSTAT CONFIGURATION (terms. 22-23)

ACH Kind of regulation for auxiliary relay: Ht = heating; CL = cooling

SAA Set Point for auxiliary relay: (-50,0÷110,0°C; -58÷230°F) it defines the room temperature

setpoint to switch auxiliary relay.

SHy Differential for auxiliary relay: (0,1÷25,5°C; 1÷45°F): Intervention differential for auxiliary relay

set point, always positive.

ArP Probe selection for auxiliary: nP = aux relay is switched by digital input with i1F = AUS; P1 =

Probe 1 (Thermostat probe); P2 = Probe 2 (evaporator probe); P3 = Probe 3 (display probe).; P4

= Probe 4

Sdd Auxiliary output working during defrost:

n = the auxiliary output is switched off during defrost

y = the auxiliary output goes on working during defrost

ALARMS

ALP Probe for temperature alarm setting: P1 = thermostat probe; P2 = evaporator probe; P3 =

condenser 1 probe; P4 O condenser 2 probe.

ALC Temperature alarm configuration

rE = High and Low alarms related to Set Point

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

ALU High temperature alarm setting:

ALC= rE, 0

50°C or 90°F

ALC= Ab, ALL

110°C or 230°F

when this temperature is reached and after the ALd delay time the HA alarm is enabled.

ALL Low temperature alarm setting: ALC = rE , 0

or -58°F

ALU when this temperature is reached and after the ALd delay time, the LA alarm is

enabled.

AFH Temperature alarm and fan differential: (0,1÷25,5°C; 1÷45°F) Intervention differential for

temperature alarm set point and fan regulation set point, always positive.

ALd Temperature alarm delay: (0÷255 min) time interval between the detection of an alarm

condition and the corresponding alarm signalling.

dAo Delay of temperature alarm at start-up: (0min÷23h 50min) time interval between the detection

of the temperature alarm condition after the instrument power on and the alarm signalling.

CONDENSER TEMPERATURE ALARM

AP2 Probe selection for temperature alarm of condenser: nP = no probe; P1 =thermostat probe;

P2 = evaporator probe; P3 =third probe; P4 = fourth probe.

AL2 Low temperature alarm of condenser: (-55÷150°C) when this temperature is reached the LA2

alarm is signalled, possibly after the Ad2 delay.

Au2 High temperature alarm of condenser: (-55÷150°C) when this temperature is reached the HA2

alarm is signalled, possibly after the Ad2 delay.

AH2 Differential for temperature condenser alarm recovery: (0,1÷25,5°C; 1÷45°F)

Ad2 Condenser temperature alarm delay: (0÷255 min) time interval between the detection of the

condenser alarm condition and alarm signalling.

dA2 Condenser temperature alarm exclusion at start up: (from 0.0 min to 23.5h, res. 10min)

bLL Compressor off with low temperature alarm of condenser: n = no: compressor keeps on

working; Y = yes, compressor is switched off till the alarm is present, in any case regulation

restarts after AC time at minimum.

AC2 Compressor off with high temperature alarm of condenser: n = no: compressor keeps on

working; Y = yes, compressor is switched off till the alarm is present, in any case regulation

restarts after AC time at minimum.

RELAY OA3 (22-23) CONFIGURATION

tbA Alarm relay silencing (with oA3=ALr):

n= silencing disabled: alarm relay stays on till alarm condition lasts,

y =silencing enabled: alarm relay is switched OFF by pressing a key during an alarm

oA3 Fourth relay configuration (22-23): dEF: do not select it!.; FAn: do not select it!.; ALr: alarm;

Lig: light; AuS: Auxiliary relay; onF: always on with instrument on; db = heating element for

neutral zone regulation; cP2 = second compressor, dF2: do not select it.

AoP Alarm relay polarity: it set if the alarm relay is open or closed when an alarm happens. CL=

terminals 1-2 closed during an alarm; oP = terminals 1-2 open during an alarm

DIGITAL INPUT

i1P Digital input polarity: oP: the digital input is activated by opening the contact; CL: the digital

input is activated by closing the contact.

i1F Digital input configuration: EAL = external alarm: "EA" message is displayed; bAL = serious

alarm "CA" message is displayed. PAL = pressure switch alarm, "CA" message is displayed; dor

= door switch function; dEF = activation of a defrost cycle; AUS =to switch on and off the 22-23

relay with oA3 = AUS; Htr = kind of action inversion (cooling – heating); FAn = not set it; ES =

Energy saving.

did: (0÷255 min) with i1F= EAL or i1F = bAL digital input alarm delay: delay between the detection

of the external alarm condition and its signalling.

with i1F= dor: door open signalling delay

1592026010 XW40K GB R1.0 22.02.2008.doc

Installing and Operating Instructions

50 °C or 90°F;

ALC = Ab , - 50°C

with i1F = PAL: time for pressure switch function: time interval to calculate the number of the

pressure switch activation.

nPS Pressure switch number: (0

15) Number of activation of the pressure switch, during the "did"

interval, before signalling the alarm event (I2F= PAL).

If the nPS activation in the did time is reached, switch off and on the instrument to restart

normal regulation.

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

rrd Outputs restart after doA alarm: no = outputs not affected by the doA alarm; yES = outputs

restart with the doA alarm;

HES Temperature increase during the Energy Saving cycle : (-30,0°C

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

OTHER

Adr RS485 serial address (1÷247): Identifies the instrument address when connected to a ModBUS

compatible monitoring system.

PbC Type of probe: it allows to set the kind of probe used by the instrument: PbC = PBC probe, ntc =

NTC probe.

onF on/off key enabling: nu = disabled; oFF = enabled; ES = to start a energy saving cycle.

dP1 Thermostat probe display

dP2 Evaporator probe display

dP3 Third probe display- optional.

dP4 Fourth probe display.

rSE Real set point: it shows the set point used during the energy saving cycle or during the

continuous cycle.

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.

7. Digital input

The free voltage digital input is programmable in different configurations by the "i1F" parameter.

DOOR SWITCH INPUT (i1F = dor)

It signals the door status and the corresponding relay output status through the "odc" parameter: no,

Fan = normal (any change); CPr, F_C = Compressor OFF.

Since the door is opened, after the delay time set through parameter "did", the door alarm is enabled,

the display shows the message "dA" and the regulation restarts is rtr = yES. 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.

GENERIC ALARM (i1F = EAL)

As soon as the digital input is activated the unit will wait for "did" time delay before signalling the "EAL"

alarm message. The outputs status don't change. The alarm stops just after the digital input is de-

activated.

SERIOUS ALARM MODE (i1F = bAL)

When the digital input is activated, the unit will wait for "did" delay before signalling the "CA" alarm

message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is de-

activated.

PRESSURE SWITCH (i1F = PAL)

If during the interval time set by "did" parameter, the pressure switch has reached the number of

activation of the "nPS" 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. If the nPS activation in the did time is reached, switch off and on the instrument to restart

normal regulation.

AUXILIARY OUTPUT SWITCHING (i1F =AUS)

With oA3 = AUS and i1F = AUX it switches the fourth relay (22-23).

START DEFROST (i1F = dFr)

It starts a defrost if there are the right conditions. After the defrost is finished, the normal regulation will

restart only if the digital input is disabled otherwise the instrument will wait until the "MdF" safety time

is expired.

INVERSION OF THE KIND OF ACTION: HEATING-COOLING (i1F = Htr)

This function allows to invert the regulation of the controller: from cooling to heating and viceversa.

ENERGY SAVING (i1F = ES)

The Energy Saving function allows to change the set point value as the result of the SET+ HES

(parameter) sum. This function is enabled until the digital input is activated.

DIGITAL INPUTS POLARITY

The digital input polarity depends on the "i1P" parameter.

i1P=CL: the input is activated by closing the contact.

i1P=OP: the input is activated by opening the contact

8. Installation and mounting

T620 keyboard shall be mounted on vertical panel, in a 150x31 mm hole, and fixed using two screws

3 x 2mm. To obtain an IP65 protection grade use the front panel rubber gasket (mod. RG-L).

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V620 keyboard shall be mounted on vertical panel, in a 72x56 mm hole, and fixed using two screws

3 x 2mm. To obtain an IP65 protection grade use the front panel rubber gasket (mod. RGW-V).

CX620 keyboard shall be mounted on vertical panel, in a 29x71 mm hole, and fixed using the special

bracket supplied.

The controller XW40K shall be mounted in a din rail

It must be connected to the keyboard by means of a two-wire cable (∅ 1mm). The temperature range

allowed for correct operation is 0 - 60 °C. Avoid places subject to strong vibrations, corrosive gases,

excessive dirt or humidity. The same recommendations apply to probes. Let the air circulate by the

cooling holes.

XW40K

1592026010

30,0°C/-22÷86°F) it sets

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