dixell CX620 Installations- und Betriebsanleitung - Seite 3
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7.8 HOW TO LOCK THE KEYBOARD (MANUALLY)
1.
Keep the UP and DOWN keys pressed together for more than 3 sec the UP and
DOWN keys.
2.
The "PoF" message will be displayed and the keyboard is locked. At this point it is
only possible the viewing of the set point or the MAX o Min temperature stored and
+
to switch ON and OFF the light, the auxiliary output and the instrument.
TO UNLOCK THE KEYBOARD
Keep the UP and DOWN keys pressed together for more than 3 sec.
7.9 ON/OFF FUNCTION (STAND BY)
By pushing the ON/OFF key, the instrument shows "OFF" for 5 sec. and the ON/OFF LED
is switched ON.
During the OFF status, all the relays are switched OFF and the regulations are stopped; if
a monitoring system is connected, it does not record the instrument data and alarms.
When the instrument is in stand by the keyboard displays "oFF".
N.B. During the OFF status the Light and AUX buttons are active.
7.10 TO SEE THE PROBE VALUES
1.
Enter in "Pr1" level.
2.
Parameters "dP1", "dP2", "dP3" and "dP4" display the value of probes 1, 2, 3 and 4.
8
PARAMETER LIST
rtC
Real time clock menu (only for controller with RTC): to set the time, date and defrost
start time.
REGULATION
HY
Differential: (0.1 to 25.5°C; 1 to 45°F) intervention differential for set point. Compressor
Cut IN is Set Point + differential (HY). Compressor Cut OUT is when the temperature
reaches the set point.
LS
Minimum set point: (-55°C to SET; -67°F to SET) sets the minimum value for the set
point.
US
Maximum set point: (SET to 150°C; SET to 302°F) set the maximum value for set point.
ot
Thermostat probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the thermostat probe.
P2P
Evaporator probe presence: (n; Y) n = not present, the defrost stops by time;
Y = present, the defrost stops by temperature.
oE
Evaporator probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the evaporator probe.
P3P
Third probe presence (P3): (n; Y) n = not present, the terminals 18-20 operate as digital
input; Y = present, the terminals 18-20 operate as third probe.
o3
Third probe calibration (P3): (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the third probe.
P4P
Fourth probe presence: (n; Y) n = Not present; Y = present.
NOTE: only for XW60LT models.
o4
Fourth probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible offset
of the fourth probe.
NOTE: only for XW60LT models.
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 the
parameter.
AC
Anti-short cycle delay: (0 to 50min) minimum interval between the compressor stop and
the following restart.
rtr
Percentage of the second and first probe for regulation: (0 to 100; 100=P1, 0=P2) it
allows to set the regulation according to the percentage of the first and second probe, as
for the following formula (rtr(P1-P2)/100 + P2).
CCt
Compressor ON time during continuous cycle: (0.0 to 24h00min, res. 10min) allows to
set the length of the continuous cycle. Compressor stays on without interruption during
CCt time. This is useful, for instance, when the room is filled with new products.
CCS
Set point for continuous cycle: (-55 to 150°C; -67 to 302°F) it sets the set point used
during the continuous cycle.
Con
Compressor ON time with faulty probe: (0 to 255min) time during which the
compressor is active in case of faulty thermostat probe. With Con=0 compressor is
always OFF.
CoF
Compressor OFF time with faulty probe: (0 to 255min) time during which the
compressor is OFF in case of faulty thermostat probe. With CoF=0 compressor is always
active.
DISPLAY
CF
Temperature measurement unit: (°C; °F) °C = Celsius; °F = Fahrenheit.
WARNING: When the measurement unit is changed the SET point and the values of
the parameters HY, LS, US, ot, ALU and ALL have to be checked and modified (if
necessary).
rES
Resolution (for °C): (in=1°C; dE=0.1°C) allows decimal point display.
Lod
Instrument display: (P1; P2, P3, P4, SET, dtr) it selects which probe is displayed by
the instrument. P1 = Thermostat probe; P2 = Evaporator probe; P3 = Third probe (only
for model with this option enabled); P4 = Fourth probe, SET = set point; dtr =
percentage of visualization.
rEd
X-REP display (optional): (P1; P2, P3, P4, SET, dtr) it selects which probe is
displayed by X- REP. P1 = Thermostat probe; P2 = Evaporator probe; P3 = Third probe
(only for model with this option enabled); P4 = Fourth probe, SET = set point;
dtr = percentage of visualization.
dLY
Display delay: (0 to 20min00s; res. 10s) when the temperature increases, the display
is updated of 1°C or 1°F after this time.
dtr
Percentage of the second and first probe for visualization when Lod=dtr: (0 to 99;
100=P1, 0=P2) if Lod=dtr it allows to set the visualization according to the percentage
of the first and second probe, as for the following formula (dtr(P1-P2)/100 + P2).
1592026020 XW60K GB R2.1 22.06.2012.doc
DEFROST
EdF
Defrost mode (only for controller with RTC):
- rtC: Real Time Clock mode. Defrost time follows Ld1 to Ld6 parameters on
workdays and Sd1 to Sd6 on holidays.
- in: interval mode. The defrost starts when the time idf is expired.
tdF
Defrost type: (EL; in) EL = electrical heater; in = hot gas.
dFP
Probe selection for defrost termination: (nP; P1; P2; P3; P4) nP = no probe;
P1 =thermostat probe; P2 = evaporator probe; P3 =configurable probe; P4 = Probe on
Hot Key plug.
dtE
Defrost termination temperature: (-55 to 50°C; -67 to 122°F) (enabled only when
EdF=Pb) sets the temperature measured by the evaporator probe, which causes the
end of defrost.
idF
Interval between defrost cycles: (0 to 120hours) determines the interval of time
between two defrost cycles.
MdF
(Maximum) length for defrost: (0 to 255min) when P2P=n, (not evaporator probe:
timed defrost) 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 to 99min) this is useful when different defrost start times are
necessary to avoid overloading the plant.
dFd
Temperature displayed during defrost: (rt; it; SEt; dEF) rt = real temperature;
it = temperature at defrost start; SEt = set point; dEF = "dEF" label.
dAd
MAX display delay after defrost: (0 to 255min) sets the maximum time between the
end of defrost and the restarting of the real room temperature display.
Fdt
Drip time: (0 to 120min) 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: (n; Y) n = after the idF time, Y = immediately.
dAF
Defrost delay after continuous cycle: (0.0 to 24h00min, res. 10min) time interval
between the end of the fast freezing cycle and the following defrost related to it.
FANS
FnC
Fans operating mode: (C-n; o-n; C-Y; o-Y) C-n = runs with the compressor, OFF during
defrost; o-n = continuous mode, OFF during defrost; C-Y = runs with the compressor, ON
during defrost; o-Y = continuous mode, ON during defrost.
Fnd
Fans delay after defrost: (0 to 255min) interval between end of defrost and evaporator
fans start.
FCt
Temperature differential to avoid fan short cycles: (0 to 59°C; 0 to 90°F) (N.B.: FCt=0
means function disabled) if the difference of temperature between the evaporator and the
room probes is higher than FCt value, the fans will be switched on.
FSt
Fans stop temperature: (-55 to 50°C; -67 to 122°F) setting of temperature, detected by
evaporator probe, above which fans are always OFF.
Fon
Fan ON time: (0 to 15min) with Fnc=C_n or 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 are always off, with Fon=0 and FoF=0 the fan are always off.
FoF
Fan OFF time: (0 to 15min)
With FnC=C_n or C_Y, (fan activated in parallel with compressor) it sets the evaporator
fan off cycling time when the compressor is off.
With Fon=0 and FoF≠0 the fan are always off, with Fon=0 and FoF=0 the fan are always
off.
FAP
Probe selection for fan management: (nP; P1; P2; P3; P4) nP = no probe;
P1 =thermostat probe; P2 = evaporator probe; P3 =configurable probe; P4 = Probe on Hot
Key plug.
OA3 = AUS: AUXILIARY THERMOSTAT CONFIGURATION (terms. 22-23)
ACH
Kind of regulation for auxiliary relay: (Ht; CL) Ht = heating; CL = cooling.
SAA
Set Point for auxiliary relay: (-55.0 to 150.0°C; -67 to 302°F) it defines the room
temperature set point to switch auxiliary relay.
SHY
Differential for auxiliary output: (0.1 to 25.5°C; 1 to 45°F) intervention differential for
auxiliary output set point.
ACH=CL, AUX Cut in is [SAA+SHY]; AUX Cut out is SAA.
ACH=Ht, AUX Cut in is [SAA–SHY]; AUX Cut out is SAA.
ArP
Probe selection for auxiliary: (nP; P1; P2; P3; P4) nP = no probe, the auxiliary relay is
switched only by the digital input; P1 = Probe 1 (Thermostat probe); P2 = Probe 2
(evaporator probe); P3 = Probe 3 (display probe); P4 = Probe 4.
Sdd
Auxiliary relay off during defrost: (n; Y) n = the auxiliary relay operates during defrost.
Y = the auxiliary relay is switched off during defrost.
ALARMS
ALP
Probe selection for alarm: (nP; P1; P2; P3; P4) nP = no probe, the temperature alarms
are disabled; P1 = Probe 1 (Thermostat probe); P2 = Probe 2 (evaporator probe);
P3 = Probe 3 (display probe); P4 = Fourth probe.
ALC
Temperature alarms configuration: (Ab; rE) Ab = absolute temperature, alarm
temperature is given by the ALL or ALU values. rE = temperature alarms are referred to
the set point. Temperature alarm is enabled when the temperature exceeds the
[SET+ALU] or [SET-ALL] values.
ALU
MAXIMUM temperature alarm:
If ALC=Ab: [ALL to 150.0°C or ALL to 302°F]
If ALC=rE: [0.0 to 50.0°C or 0 to 90°F]
when this temperature is reached the alarm is enabled, after the ALd delay time.
ALL
Minimum temperature alarm:
If ALC=Ab: [-55°C to ALU; -67 to ALU]
If ALC=rE: [0.0 to 50.0°C or 0 to 90°F]
when this temperature is reached the alarm is enabled, after the ALd delay time.
AFH
Differential for temperature alarm recovery: (0.1 to 25.5°C; 1 to 45°F) intervention
differential for recovery of temperature alarm.
ALd
Temperature alarm delay: (0 to 255 min) time interval between the detection of an alarm
condition and alarm signalling.
dAo
Exclusion of temperature alarm at start-up: (0.0 to 24h00min, res. 10min) time interval
between the detection of the temperature alarm condition after instrument power on and
alarm signalling.
XW60K
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