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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12 CM110385en_05
Building Technologies
Fan control
28 Feb 2009
The values have the following effect:
Value
Description
(required fan speed)
1-stage 2-stage 3-stage
0%
Off Off Off
0.5 ... 33 %
On 1 1
33,5 ... 66,5 % On 1 2
67 ... 100 %
On 2 2
100 %
On 2 3
If "fan= 0" is commanded via bus, the controller realizes this indirectly by setting the
occupancy status to Standby ant thus the effective room operating mode to
Precomfort
or
Economy
. The room unit will indicate this as .
In rare cases the room temperature will exceed the setpoints of Standby / Eco, and the
fan will start, despite the overrun command.
The effective fan speed is available in the following S-mode output communication
object:
Fan output (Output communication object)
Flags
R W K T U
Type Send
heartbeat
Value
1 0 1 1 0 5.001
DPT_Scaling
yes
0...100% 0 = 0%
255 = 100%
In LTE mode, the value for the fan is transmitted as follows:
Fan output (Output)
Possible partner function blocks
Known partner devices
FanSpeed
Geographical zone
393 UFS
User Fan Speed Setting
---
9.2
Fan parameter setting
Select
Fan control, Fan speeds.
ETS3
Professional
9.2.1
9.2.2
7.1.2
9.2.4
9.2.3