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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12
CM110385en_05
Building Technologies
Room operating modes
28 Feb 2009
The table below shows the effect of the /Auto button on the
effective room operating
mode
of the room controller.
Existing effective
room op. mode
Display on
room unit
Manual operation of
the / Auto button
New
rffective room
operating mode
Comfort
Auto
Æ
Precomfort
if
effective occupancy
= Occupied
or
Standby
Economy
if
effective occupancy
= Unoccupied
Precomfort
Æ
Auto
Comfort
Economy
Æ
Auto
Comfort
during
Temporary
Comfort
period
1)
Protection mode
Æ
Auto
Protection
, no change
Key: “
Æ
Auto" means: "changes to Auto"
1)
Comfort
mode is operative for the pre-defined
Temporary Comfort
period (see page
126). The room controller then reverts to
Economy.
5.3.6
Local control of room operating mode via the
Temporary Comfort mode
input
KNX
R
CO
S
Central
Local
1.
2.
3.
S
DI
S
S
S
DI
S
3.
Controller
Prio
PPS2
3.
S
The communication object
Temporary Comfort mode
has an effect similar to that of the /Auto button on the
room unit. However, the HVAC control system can only
be "switched on", i.e. the room operating mode
switches to
Comfort
only.
Any KNX/EIB switch (pulse switch) can be used for the input:
RXB... room controller
EIB / KNX button
Temporary Comfort mode
10385Z59de
The following S-mode communication object is used to integrate a bus switch:
Temporary comfort mode (Input communication object)
Flags Type
Receive timeout
States
R W C T U
0 1 1 0 0 1.017
DPT_Trigger
No
1 = Trigger
0 = Not used
KNX
R
CO