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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
Determine the room operating mode with
third-party products (S-mode)
In S-mode the
effective room operating mode
of the room controller depends on the
central
Room operating mode
time schedule and/or on local influences such as window
contacts, presence detectors or room units.
The diagram below shows how these influences are processed by the room controller,
and their priority:
PPS2
S
Central
Local
1.
3.
S
DI
S
S
DI
Effective
room op. mode
3.
Controller
1.
3.
Room operating mode
Pr
o
te
ct
ion
mo
de
Window contact
Presence detector
Room unit
Prio
10385Z
56
3.
Temporary
Comfort mode
S
S
Effective
occupancy
•
The effects of
Priority 1 and Priority 2
are similar in nature to continuous
states
•
The
Priority 3
influences are treated as
events
.
The key factor is the moment at which the state changes (trigger edge).
If the mode is later changed by another source of priority 3,
the last change
applies.
Note!
