Gira KNX 2139 00 Product Documentation page 146

Room temperature controller | Operating mode and setpoints
The temperature setpoints programmed in the room temperature controller by the
ETS during commissioning can be changed via communication objects. In the ETS,
the parameter "Overwrite setpoints in the device during ETS programming" on the
parameter page "Room temperature controller -> RTCx - General -> Setpoints" can
be used to determine whether the setpoints that are present in the device and may
have been subsequently changed are overwritten during an ETS programming oper-
ation and thus replaced again by the values configured in the ETS. If this parameter
is "Yes", then the setpoint temperatures are deleted in the device during a program-
ming operation and replaced by the values of the ETS. If this parameter is configured
to "No", then setpoints present in the device remain unchanged. The setpoint temper-
atures entered in the ETS then have no significance.
During initial commissioning of the device the parameter "Overwrite setpoints
in device during ETS programming" must be set to "yes" in order to perform
valid initialisation of the memory slots in the device. The setting "Yes" is also
necessary if essential controller properties (operating mode, setpoint specifica-
tion, etc.) are changed in the ETS through new parameter configurations.
Setpoint temperatures for relative setpoint presetting
Depending on the operating mode, different cases should be distinguished when
specifying the relative setpoint temperature, which then have an impact on the tem-
perature derivation from the basic setpoint.
Setpoints for operating mode "Heating"
Image 36: Setpoint temperatures in the operating mode "Heating"
The setpoint temperatures for Comfort, Standby and Night mode exist in this operat-
ing mode and the frost protection temperature can be preset (see figure 36). The fol-
lowing applies...
T
Standby setpoint heating
or
T
Night setpoint heating
The Standby and Night setpoint temperatures are derived from the reduction temper-
atures configured in the ETS from the comfort setpoint temperature (basic setpoint).
The frost protection is supposed to prevent the heating system from freezing. For this
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
≤ T
Comfort setpoint heating
≤ T
Comfort setpoint heating
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