Rev. d 01/1 10
DMP052E
SET-POINT COMPENSATION
The operation SET-POINT can be fixed or determined by a compensation slope according to the
value given by the compensation sensor.
Both A1 and D1 temperature loops can be temperature
compensated (the SC sensor is necessary) or humidity
compensated (SH sensor). It is necessary to set the
Cth
parameter to state the temperature and humidity
compensation.
Both A2 and D2 humidity loops can be
temperature compensated only (the SC sensor is
necessary).
The compensation slope is a broken line touching two
points and given by four values.
Depending on the value given by the sensor, a set-point value shall be defined in a range between
a minimum and a maximum.
“Negative Compensation” means when the operating set-point increases while the compensation
sensor value decreases.
“Positive Compensation” means when operating set-point
increases by the increasing of compensation sensor
value.
It is possible to set Negative and Positive Compensations
both for temperature and humidity control loops.
Each operation set-point value, both by temperature
(heating and/or cooling) and by humidity
(humidification/dehumidification) control loop can be
associated to a relevant slope resulting by two values:
- SET-POINT 1 corresponding to TEMPERATURE 1
- SET-POINT 2 corresponding to TEMPERATURE 2
If the Compensation Sensor is present and the Compensation of an Operating Mode is enabled, it
is necessary to determine the four values of the curve. Such values become eight in case of
Operating Mode A3, A4 and D3 because it is necessary to set compensation both for the heating
and for the cooling loops. In the latter case, if compensation should be disabled for one of the two
Loops only, it is necessary to set the minimum Set-point equal to the maximum value achieving a
fixed operation Set-point. It is not possible to enable compensation in Operating Mode D4.
While the A2 and D2 loops can be compensated through the SC temperature sensor, loops A1 and
D1 may be temperature or humidity compensated. The selection is made under the Level II menu
(label Cth).
For the temperature compensation the Compensation Sensor used is the one connected to
SC
input, if not differently specified (“SC sharing” see paragraph related to LinkBus). To enable
Compensation first connect or share the Compensation Sensor. If compensation is enabled on any
Operating Mode and the Compensation Sensor is not connected correctly to
SC
terminal or is not
shared correctly with other devices, the Anomaly led
@
lights up and the control Set-point
becomes the value set for fixed point, i.e. without Compensation.
For humidity compensation the possible absence of SH sensor does not generate any fault since
its value can be 0.
By humidity control loops, the possibility to compensate the set point depending on
SC
signal is
used either to perform the remote setting of humidity set point through a potentiometer (see remote
set page 14) or e.g. to compensate linearly minus the room humidity set according to the inner
temperature of glass surface (anti-frost function in swimming pools or wet environments).
In this case, the temperature sensor connected to
SC
must be located in the indoor part of the
glass wall.
For all compensation parameters settings see page 18
