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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
5.4.6
Local control of room operating mode via the
Temporary Comfort mode
input
KNX
R
CO
PPS2
S
Central
Local
1.
3.
S
DI
S
S
DI
3.
Controller
1.
3.
Prio
3.
S
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 ComfortMode
10385Z59en
The following S-mode communication object is used to integrate a bus switch:
Temporary comfort mode (Input communication object)
Flags
R
W
C
T
U
Type
Receive timeout
States
0 1 1 0 0 1.017
DPT_Trigger
No
1 = Trigger
0 = Not used
The communication object
Temporary Comfort mode
has two possible states:
State
Description
1 = Trigger
Effective room operating mode
is
Comfort
0 = Not used
Has no influence on the
effective room operating mode
•
The change in the
effective room operating mode
is event-driven, the key factor
being the moment when the communication object is received.
•
The
Effective occupancy
or room unit (both Priority 3) can cause the
effective room
operating mode
to change again
Æ
the last command always applies.
KNX
R
CO
Effective
room operating mode