Heating/Cooling Output - Siemens Desigo RXB Technical Manual

Changeover
K N X
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Siemens
Building Technologies
Changeover is only possible if the control sequence parameter is set to changeover.
In this case, a changeover command (heating or cooling) is essential. In the absence of
the required information (e.g. due to problems with data communication), the controller
operates as follows:
– After a reset, the controller operates in heating mode until another changeover
command is received.
– If the transfer of data is interrupted, the controller remains in the last valid room
operating mode.
The changeover information must be transmitted to the bus and is integrated via the
following communication object:
H/C changeover input (Input communication object)
Flags Type
R W C T U
0 1 1 0 0 1.100
DPT_Heat/Cool
The following communication object is used in LTE-mode:
H/C changeover (Input)
ChangeOverStatusWater
Distribution zone, heating
Distribution zone, cooling
8.1.3

Heating/cooling output

The controller makes its status (heating or cooling) available via the following
communication object:
Heating/cooling output (Output communication object)
Flags Type
R W C T U
1 0 1 1 0 1.100
DPT_Heat/Cool
The value of the Output as a function of the room temperature is shown in the following
diagram:
Value
1 = Heat
0 = Cool
SpH
RXB (KNX) application library
Control sequences
Receive timeout
yes
Possible partner function blocks Known partner devices
342 WCOS
Water Changeover Status Sensor
Send heartbeat
yes
TR
SpC
FNC Description of functions for FC-10, FC-11, FC-12
Value
0 = Cooling
1 = Heating
Siemens:
Synco RMU710 / 20 / 30
RMB795 / RMS705
Value
0 = Cooling
1 = Heating
CM110385en_05
28 Feb 2009