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P4 Offset Input Signal
Comfort / Comfort Plus controls are typically connected to a
humidity sensor, whose signal of 0 V, 0 mA or 0 Ohm indicates
0% RH. If you employ another humidity sensor, i.e. a humidity
sensor with an input signal of 4-20 mA, the Parameter P4 “offset
input signal” must be programmed to 20%. Taking this step
ensures that the Comfort / Comfort Plus control correctly reads a
4 mA signal as 0% RH.
A: Humidity [% RH] B: Input Signal Humidity Sensor
The same applies for an external control signal of 2-10 V, 4-20
mA, 2 - 5 V or 4 -10 mA.
P5 Address
As an option, the Comfort / Comfort Plus can be equipped with
an RS485 or RS232 computer interface. The required Modbus
RTU address for this can be set here.
Sensor Damping (P7)
This parameter affects the response behavior of the internal
software controller. The setting “sensor damping yes” activates a
damping element. This is advisable when connecting the control
to a delay action capacitive humidity sensor.
P8 Desired Value Relative Humidity
At Parameter P8, one can set the desired value for relative
humidity [%]. This parameter is only displayed if the control is set
to “PI-controller” (U6=PI-controller).
P11 Reset main contactor interval
After the preprogrammed number of operations of the main con-
tactor (K1) the HygroMatik control provides the message "Main-
tenance K1". It is recommended to then swap the main contactor
and erase the message.
P15 Parity
P15 allows for setting the parity bit for the serial interface in use
(RS232 or RS485):
„8-N-1/8-E-1“: no parity/even parity.
A
100
0
0-20 mA, P4 = 0%
4-20 mA, P4 = 20%
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