Operating Instructions

Table Of Contents
120/182
Siemens RXB (KNX) application library RXB Description of functions for FC-10, FC-11, FC-12, FC-13 CM110385en_08
Building Technologies Fan control 2013-06-17
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 time between a bus command and the reaction of the fan may be up to 5-6 sec.
The effective fan speed is available in the following S-mode output communication
object:
Fan output (Output communication object)
Flags
Type Send heartbeat Value
R
W
K
T
U
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
393 UFS
User Fan Speed Setting
---
Geographical zone
Note