Doc. No.:
560001 EG
Page:17
Ed.1" 08-2014
From ser. no.:
rd
Set Point
OFF
ON
DIRECT Freddo
attuatore
D
St
rd/2
rd/2
Sonda virtuale
Direct
ENGLISH
Fig. 7.b
Fig. 7.a
/A2: Confi guration of probe 2
Used to confi gure the operating mode of probe 2.
/A2= 0 => probe 2 absent
/A2= 1 => product probe (used for display only)
/A2= 2 => defrost probe
/A2= 3 => condenser probe
/A2 = 4 => antifreeze probe
In any case, probe 2 is used for calculating the virtual control probe.
Default: /A2= 2 => defrost probe; /A2= 0 on models M and S => probe 2 absent.
/A3: Confi guration of probe 3
As above, but relating to probe 3.
Important note:
the input is enabled for use with a probe only if the parameter corresponding to digital input A4 is set to 0.
Default: /A3= 0 => Probe 3/Digital input absent.
/C1: Calibration or off set for probe 1
/C2: Calibration or off set for probe 2
/C3: Calibration or off set for probe 3
These parameters are used to correct the temperature measured by the probes, using an off set: the value assigned to these
parameters is in fact added to (positive value) or subtracted from (negative value) the temperature measured by the probes. The
temperature value is corrected by the off set before checking if the reading is out-of-range.
Example:
to decrease the temperature measured by probe 1 by 2.3 degrees, set /C1= -2.3. The calibration or off set can be set
from -20 to +20.
Warning:
if the probe is disabled, the display shows ‘___’. If the probe is faulty, the display shows the corresponding error code.
When displaying the parameter, pressing SET shows the value of the corresponding probe already corrected with the off set, while
pressing SET a second time displays the abbreviated code.
Default: /C1=/C2=/C3=/C4=/C5=0 no off set.
7.2 Temperature control parameters
Code
Parameter
Model
UOM
Type Min
Max
Def.
St
Temperature set point
MSYF
°C/°F
F
r1
r2
0.0
rd
Control delta
-SYF
°C/°F
F
0.1
20
2.0
rn
Dead band
-SYF
°C/°F
C
0.0
60
4.0
rr
Reverse diff erential for control with dead band
-SYF
°C/°F
C
0.1
20
2.0
r1
Minimum set point allowed
MSYF
°C/°F
C
-50
r2
-50
r2
Maximum set point allowed
MSYF
°C/°F
C
r1
200
60
r3
Operating mode
-SYF
fl ag
C
0
2
0
r4
Automatic night-time set point variation
MSYF
°C/°F
C
-20
20
3.0
r5
Enable temperature monitoring
MSYF
fl ag
C
0
1
0
rt
Temperature monitoring interval
MSYF
hours
F
0
999
-
rH
Maximum temperature read
MSYF
°C/°F
F
-
-
-
rL
Minimum temperature read
MSYF
°C/°F
F
-
-
Tab. 7.c
St: set point
Establishes the set point value used by the controller. Default: St=0.0.
rd: Control delta
Establishes the value of the diff erential, or hysteresis, used for temperature control. Low values guarantee an ambient temperature
that deviates only slightly from the set point, but involves frequent starts and stops of the main actuator (normally the compressor).
In any case, the compressor can be protected by suitably setting the parameters that limit the number of
activations/hour and the minimum OFF time (see the C parameters).
Note:
if control with two compressor steps has been selected (‘H1, H5’=12, 13), the diff erential ‘rd’ is divided between the two
steps.
Default: rd =2
rn: Dead band
Establishes the value of the dead band, when the auxiliary output is selected as heating, in control with dead band mode. The
diff erential is in the centre of the dead band.
