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1592009037 XW270-271L GB r1.0 15.12.2004.doc
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“P3”
Auxiliary probe failure
Alarm output ON; Other outputs unchanged
“HA”
Maximum temperature alarm
Alarm output ON; Other outputs unchanged
“LA”
Minimum temperature alarm
Alarm output ON; Other outputs unchanged
“EE”
Data or memory failure
Alarm output ON; Other outputs unchanged
“dA”
Defrost timeout alarm
Alarm output ON; Other outputs unchanged
“dAL”
Door switch alarm
Alarm output ON; Other outputs unchanged
“EAL”
External alarm
Alarm output ON; Other outputs unchanged
“BAL”
Serious external alarm
Alarm output ON; Other outputs OFF
“PAL”
Pressure switch alarm
Alarm output ON; Other outputs OFF
The alarm message is displayed until the alarm condition is recovery.
All the alarm messages are showed alternating with the room temperature except for the “P1” which is flashing.
To reset the “EE” alarm and restart the normal functioning press any key, the “rSt” message is displayed for about
3s.
SILENCING BUZZER / ALARM RELAY OUTPUT
If “tbA = y”, once the alarm signal is detected the buzzer and the relay are is silenced by pressing any key.
If “tbA = n”, only the buzzer is silenced while the alarm relay is on until the alarm condition recovers.
“EE” ALARM
The
instruments are provided with an internal check for the data integrity. Alarm “EE” flashes when a
failure in the memory data occurs. In such cases the alarm output is enabled.
ALARM RECOVERY
Probe alarms : “P1” (probe1 faulty), “P2” and “P3”; they automatically stop 10s after the probe restarts normal
operation. Check connections before replacing the probe.
Temperature alarms “HA” and “LA” automatically stop as soon as the thermostat temperature returns to normal
values or when the defrost starts.
Door switch alarm “dA” stop as soon as the door is closed.
External alarms “EAL”, “BAL” stop as soon as the external digital input is disabled “PAL” alarm is recovered by
switching OFF the instrument.
TECHNICAL DATA
Housing: self extinguishing ABS.
Case: facia 38x185 mm; depth 76mm
Mounting : panel mounting in a 150x31 mm panel cut-out with two screws.
∅
3 x 2mm.
Distance between the holes 165mm
Protection: IP20.
Frontal protection: IP65 with frontal gasket mod RG-L. (optional)
Connections: Screw terminal block
≤
2,5 mm
2
heat-resistant wiring and 6,3mm Faston
Power supply: 230Vac or. 110Vac
±
10%
Power absorption: 7VA max.
Display: 3 digits, red LED, 14,2 mm high.
Inputs: 3 NTC probes
Digital inputs: 2 free voltage
Relay outputs: Total current on loads MAX. 20A
compressor: relay SPST 20(8) A, 250Vac
light: relay SPST 16(3) A, 250Vac
fans: relay SPST 8(3) A, 250Vac
defrost: relay SPST 8(3) A, 250Vac
alarm: SPST relay 8(3) A, 250Vac
auxiliary: SPST relay 16(3) A, 250Vac
Other output : alarm buzzer
Serial output : TTL standard
Communication protocol: Modbus - RTU
Data storing: on the non-volatile memory (EEPROM).
Kind of action: 1B.
Pollution grade: normal
Software class: A.
Operating temperature: 0÷60 °C.
Storage temperature: -25÷60 °C.
Relative humidity: 20
÷
85% (no condensing)
Measuring and regulation range: NTC probe: -40÷110°C (-58÷230°F)
Resolution: 0,1 °C or 1°C or 1 °F (selectable).
Accuracy (ambient temp. 25°C): ±0,5 °C ±1 digit
CONNECTIONS
XW270L/XW271L
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ALARM
AUX
(*)
Def.
Comp
Fan
Light
Line
Ne
u
tr
a
l
20A
250Vac
MA X
20A
8A
250Vac
16A
250Vac
8A
250Vac
8A
250Vac
16A
250Vac
DEFAULT SETTING VALUES
Label Name
Range
Default
Level
REGULATION
°C/°F
XW270L XW271L
Set
Set point
LS÷US
-5
Pr1
Pr1
Hy
Differential
0,1÷25,5 °C / 1÷45°F
2
Pr1
Pr1
LS
Minimum set point
-50,0°C÷SET / -58°F÷SET
-30
Pr2
Pr2
US
Maximum set point
SET ÷ 110°C / SET ÷ 230°F
20
Pr2
Pr2
OdS
Outputs activation delay at start up
0÷255 min.
1
Pr2
Pr2
AC
Anti-short cycle delay
0÷30 min.
1
Pr1
Pr1
CCt
Compressor ON time during fast freezing
0 ÷ 23h 50 min.
0
Pr2
Pr2
COn
Compressor ON time with faulty probe
0÷255 min.
15
Pr2
Pr2
COF
Compressor OFF time with faulty probe
0÷255 min.
30
Pr2
Pr2
DISPLAY
CF
Temperature measurement unit
°C ÷ °F
°C
Pr2
Pr2
rES
Resolution (integer/decimal point)
in ÷ de
de
Pr1
Pr1
Lod
Local display
P1 ÷ 1r2
P1
Pr2
Pr2
Red
Remote display
P1 ÷ 1r2
P1
Pr2
Pr2
DEFROST
tdF
Defrost type
rE, rT, in
rE
Pr1
Pr1
EdF
Defrost mode
In, Sd
In
Pr2
Pr2
SdF
Set point for SMART DEFROST
-30 ÷ +30°C / -22÷+86°F
0
Pr2
Pr2
dtE
Defrost termination temperature
(1°Evaporator)
-50,0÷110°C/ -58÷230°F
8
Pr1
Pr1
IdF
Interval between defrost cycles
1÷120h
6
Pr1
Pr1
MdF
(Maximum) length for 1° defrost
0÷255 min.
30
Pr1
Pr1
dFd
Displaying during defrost
rt, it, SEt, dEF, dEG
it
Pr2
Pr2
dAd
MAX display delay after defrost
0÷255 min.
30
Pr2
Pr2
Fdt
Draining time
0÷60 min.
0
Pr2
Pr2
dPO
First defrost after start up
n ÷ y
n
Pr2
Pr2
dAF
Defrost delay after fast freezing
0 ÷ 23h 50 min.
2
Pr2
Pr2
FANS
FnC
Fans operating mode
C-n, C-y, O-n, O-y
O-n
Pr2
Pr2
Fnd
Fans delay after defrost
0÷255 min.
10
Pr2
Pr2
FSt
Fans stop temperature
-50,0÷110°C/ -58÷230°F
2
Pr2
Pr2
ALARMS
ALC
Temperature alarms configuration
rE÷Ab
rE
Pr2
Pr2
ALU
MAXIMUM temperature alarm
-50,0÷110°C/ -58÷230°F
10
Pr1
Pr1
ALL
minimum temperature alarm
-50,0÷110°C/ -58÷230°F
10
Pr1
Pr1
AFH
Temperature alarm and fan differential
0,1÷25,5 °C / 1÷45°F
2
ALd
Temperature alarm delay
0÷255 min.
15
Pr2
Pr2
dAO
Delay of temperature alarm at start up
0 ÷ 23h 50 min.
1,3
Pr2
Pr2
EdA
Alarm delay at the end of defrost
0÷255 min.
30
Pr2
Pr2
dot
Delay of temperature alarm after closing
the door
0÷255 min.
15
Pr2
Pr2
dOA
Open door alarm delay
0÷255 min.
15
Pr2
Pr2
tBA
Alarm relay silencing
y ÷ n
y
Pr2
Pr2
nPS
Pressure switch activation number
0÷15
0
Pr2
Pr2
ANALOGUE INPUTS
Ot
Thermostat probe calibration
-12,0÷12,0°C / -21÷21°F
0
Pr1
Pr1
OE
Evaporator probe calibration
-12,0÷12,0°C / -21÷21°F
0
Pr2
Pr2
O3
Auxiliary probe calibration
-12,0÷12,0°C / -21÷21°F
0
Pr2
Pr2
P2P
Evaporator probe presence
n ÷ y
y
Pr2
Pr2
P3P
Auxiliary probe presence
n ÷ y
n
Pr2
Pr2
HES
Temperature increase during the Energy
Saving cycle
-30÷30°C / -22÷86°F
0
Pr2
Pr2
DIGITAL INPUTS
Odc
Open door control
no, Fan, CPr, F_C
Fan
Pr2
Pr2
I1P
Door switch polarity
CL÷OP
CL
Pr2
Pr2
I2P
Configurable digital input polarity
CL÷OP
CL
Pr2
Pr2
i2F
Digital input configuration
EAL, bAL, PAL, dFr,
AUS, ES, OnF
EAL
Pr2
Pr2
dId
Digital input alarm delay
0÷255 min.
5
Pr2
Pr2
SAA
Set point for anti-condensing heater
-50,0÷110°C/ -58÷230°F
-20.0
- - -
Pr2
OTHER
Adr
Serial address
0÷247
1
Pr1
Pr1
rEL
Software release
- - -
1.0
Pr2
Pr2
Ptb
Map code
- - -
- - -
Pr2
Pr2
Prd
Probes display
Pb1÷Pb3
- - -
Pr2
Pr2
Pr2
Access parameter list
- - -
- - -
Pr2
Pr2
Dixell S.p.A. Via dell’Industria, 27 - 32010 Z.I Pieve d’Alpago (BL) ITALY
tel. +39 - 0437 - 98 33 - fax +39 - 0437 - 98 93 13 -
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