Siemens Desigo RXB, Technical Manual, Page: 306 / 476

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Siemens RXB (KNX) application library FNC Description of functions for FC-10, FC-11, FC-12 CM110385en_05
Building Technologies Setpoint calculation 28 Feb 2009
6.1.1 Bus output for current setpoints
The present setpoints can be integrated in the building automation and control system
via the following S-mode communication objects
individually or as triplets :
Present Eco cooling setp (Output communication object)
Present Precomf cooling setp (Output communication object)
Present Comf cooling setp (Output communication object)
Present Comf heating setp (Output communication object)
Present Precomf heat setp (Output communication object)
Present Eco heating setp(Output communication object)
Flags
R W C T U Type Send
heartbeat
Values
1 0 1 1 0 9.001
DPT_Value_Temp
yes
Floating point (°C)
Present setpoints heating (Output communication object)
Present setpoints cooling (Output communication object)
Flags
R W C T U Type Send
heartbeat
Values
1 0 1 1 0 222.100
DPT_TempRoomSetpSetF16[3]
yes 3 floating point values
- Comfort (°C)
- Precomfort (°C)
- Economy (°C)
6.1.2 Bus output effective setpoints
For integration into a building automation and control system, the controller maps the
effective setpoints associated with the effective room operating mode to the following
communication object:
Effective setpoint (Output communication object)
Effective setpoint heating (Output communication object)
Effective setpoint cooling (Output communication object)
Flags
R W C T U Type Send heartbeat Value
1 0 1 1 0 9.001
DPT_Value_Temp
yes Floating point (°C)
If the room temperature is in the dead band, the
Effective setpoint transmitted by the
controller is either the heating or the cooling setpoint, depending on the controller's last
activity.
6.1.3 Bus outputs LTE mode
In LTE-mode, the current and effective setpoints are not transmitted to the building
automation and control system.
KNX
R
CO
Note