16
Set Point change mode
This allows for quick alternation between two working temperatures in the cold room store, modifying the Set
Point in line with the value indicated in parameter
C12
. The aforementioned value may be negative or positive,
which allows for the Set Point to be reduced or increased. If it is configured in 0, the mode is disabled.
It is activated in three possible ways:
Ÿ
By means of an external switch connected to one of the digital inputs. The digital input should be configured
as “Set Point change (
I10
or
I20
=4). Activation through this method cancels any other activation and can
only be deactivated using the same method.
Ÿ
By means of the AKONet application. This requires the device to be connected to a Modbus network (see p. 36).
Ÿ
By means of the CAMM module and the AKO CAMM tool application.
EXAMPLE:
If the
SELFDRIVE
mode is active:
It is recommended for calibration to be performed with the lowest set point value.
It is recommended that the difference between set points is not greater than 5 ºC in negative cold
rooms and 2 ºC in positive cold rooms.
Compressor protection timing
Parameter
C4
allows for selection of the type of timing to be applied to protect the compressor. These delays
prevent continuous compressor starts and stops.
These timings affect the COOL and AUX 1 relays (if
o00
=1)
OFF-ON
(C4=0)
:
Minimum time in OFF mode before each start-up.
OFF-ON / ON-OFF
(C4=1)
:
Minimum time in ON and OFF mode for each cycle.
The delay time is defined by means of parameter
C5
; if
C5
=0, timing is disabled.
SP
SP+C12
Solenoid
D1
ON
ON
SP+C1
(SP+C12)+C1
Gnd
D2 / S3
D1
Cambio
Set Point
DIG. IN
Configuration
I10:
4
I11:
0
D1= ON
D1= OFF
S1
ON
ON
OFF-ON
(C4=0)
OFF-ON / ON-OFF
(C4=1)
SP
SP
SP+C1
SP+C1
C5
C5
C5
OFF
OFF
COOL
COOL
1652H4A02 Ed.09
