1592027600 XW90LT RTC GB r1.1 10.02.2012.doc
XW90LT
4/6
rrd
Outputs restart after door open alarm: (n; Y) n = outputs follow the odC parameter.
Y = outputs restart with a door open alarm.
HES
Delta temperature during an Energy Saving cycle: (-30.0 to 30.0°C; -54 to 54°F) it
sets the increasing value of the set point [SET+HES] during the Energy Saving cycle.
CURRENT TIME AND WEEKLY HOLIDAYS (ONLY FOR MODELS WITH RTC)
Hur
Current hour: 0 to 23h.
Min
Current minute: 0 to 59min.
dAY
Current day: Sun to SAt.
Hd1
First weekly holiday: (Sun to nu) set the first day of the week which follows the holiday
times.
Hd2
Second weekly holiday: (Sun to nu) set the second day of the week which follows the
holiday times.
N.B.: Hd1, Hd2 can be set also as “nu” value (Not Used).
ENERGY SAVING TIMES (only for models with rtc)
ILE
Energy Saving cycle start during workdays: (0 to 23h50min) during the Energy
Saving cycle the set point is increased by the value in HES so that the operation set
point is SET+HES.
dLE
Energy Saving cycle length during workdays: (0 to 24h00min) sets the duration of
the Energy Saving cycle on workdays.
ISE
Energy Saving cycle start on holidays: 0 to 23h50min.
dSE
Energy Saving cycle length on holidays: 0 to 24h00min.
TO SET DEFROST TIMES (ONLY FOR MODELS WITH RTC)
Ld1÷Ld6
Workday defrost start: (0 to 23h50min) these parameters set the beginning of the 6
programmable defrost cycles during workdays. Ex: when Ld2=12.4 the second
defrost starts at 12.40 during workdays.
Sd1÷Sd6
Holiday defrost start: (0 to 23h50min) these parameters set the beginning of the 6
programmable defrost cycles on holidays. Ex: when Sd2=3.4 the second defrost
starts at 3.40 on holidays.
N.B.: to disable a defrost cycle set it to “nu” (not used).
OTHER
LoC
Lock keyboard timer: nu(9) = keyboard never blocked, or 10 to 255 sec
Adr
Serial address: (1 to 247) identifies the instrument address when connected to a
ModBUS compatible monitoring system.
PbC
Type of probe: (PtC; ntC) it allows to set the kind of probe used by the instrument:
PtC = PTC probe, ntC = NTC probe.
onF
On/Off key enabling: (nU; oFF; ES) nU = disabled; oFF = enabled; ES = not set it.
dP1
Thermostat probe display.
dP2
Evaporator probe display.
dP3
Third probe display.
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
Software release for internal use.
Ptb
Parameter table code: readable only.
9.
DIGITAL INPUTS
The first digital input (terminals 13-14) is enabled if P3P=n.
With P3P=n and i1F=i2F the second digital input will be disabled.
The free voltage digital inputs are programmable by the i1F and i2F parameters.
9.1
GENERIC ALARM (i1F or i2F = 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 doesn’t change. The alarm stops just after the digital input is de-
activated.
9.2
SERIOUS ALARM MODE (i1F or i2F = 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.
9.3
PRESSURE SWITCH (i1F or i2F = 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.
9.4
DOOR SWITCH INPUT (i1F or i2F = dor)
It signals the door status and the corresponding relay output status through the odC parameter: no:
normal (any change); FAn: Fan OFF; CPr: Compressor OFF; F_C: Compressor and fan OFF.
Since the door is opened, after the delay time set through parameter did, the door alarm is enabled,
the display shows the message “dA” and the regulation restarts if 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.
9.5
START DEFROST (i1F or i2F = dEF)
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.
9.6
SWITCH THE AUXILIARY RELAY (i1F or i2F = AUS)
With oAx=AUS the digital input will change the status of the auxiliary relay.
9.7
INVERSION OF THE KIND OF ACTION: HEATING-COOLING (i1F or i2F=Htr)
This function allows to invert the regulation of the controller: from cooling to heating and viceversa.
9.8
ENERGY SAVING (i1F or i2F = 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.
9.9
HOLIDAY DEFROST (i1F or i2F = HDF) (ONLY FOR MODELS WITH RTC)
This function enabled the holiday defrost setting.
9.10
ON OFF FUNCTION (i1F or i2F = onF)
To switch the controller on and off.
9.11
DIGITAL INPUTS POLARITY
The digital input polarity depends on the i1P and i2P parameters.
-
i1P or i2P =CL: the input is activated by closing the contact.
-
i1P or i2P=OP: the input is activated by opening the contact.
10.
TTL SERIAL LINE – FOR MONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows by means of the external
TTL/RS485 converter, XJ485-CX, to connect the instrument to a monitoring system ModBUS-RTU
compatible such as the X-WEB500/3000/300.
11.
X-REP OUTPUT – OPTIONAL
As optional, an X-REP can be connected to the instrument, trough the dedicated connector.
To connect the X-REP to the
instrument the following
connectors must be used
CAB/REP1(1m), CAB/REP2
(2m), CAB/REP5 (5m),
12.
INSTALLATION AND MOUNTING
The XW90LT shall be mounted on vertical panel, in a 150x31 mm hole, and fixed using the special
brackets supplied with the controllers. 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 the air circulate by the cooling holes.
12.1
CUT OUT
13.
ELECTRICAL CONNECTIONS
The instruments are provided with screw terminal block to connect cables with a cross section up to
2.5 mm
2
for the digital and analogue inputs. Relays and power supply have a Faston connection
(6.3mm). Heat-resistant cables have to be used. Before connecting cables make sure the power
supply complies 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 relay, in case of heavier loads use a suitable external relay.
N.B. Maximum current allowed for all the loads is 20A.
13.1
PROBE CONNECTION
The 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 streams to correctly
measure the average room temperature. 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 termination.
14.
HOW TO USE THE HOT KEY
14.1
PROGRAM A HOT KEY FROM AN INSTRUMENT (UPLOAD)
1.
Program one controller with the front keypad.
2.
When the controller is ON, insert the “HOT-KEY” and push UP button; the “uPL” message
appears followed a by a flashing “End” label.
3.
Push SET button and the “End” will stop flashing.
4.
Turn OFF the instrument, remove the “HOT-KEY” and then turn it ON again.
NOTE: the “Err” message appears in case of a failed programming operation. In this case push again
button if you want to restart the upload again or remove the “HOT-KEY” to abort the operation.
14.2
PROGRAM AN INSTRUMENT BY USING A HOT KEY (DOWNLOAD)
1.
Turn OFF the instrument.
2.
Insert a pre-programmed “HOT-KEY” into the 5-PIN receptacle and then turn the Controller
ON.
3.
The parameter list of the “HOT-KEY” will be automatically downloaded into the Controller
memory. The “doL” message will blink followed a by a flashing “End” label.
4.
After 10 seconds the instrument will restart working with the new parameters.
5.
Remove the “HOT-KEY”.
NOTE: the message “Err” is displayed 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.
