Determine The Room Operating Mode Without A Bus (Stand-Alone) - Siemens Desigo RXB Technical Manual

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5.6
Determine the room operating mode without
a bus (stand-alone)
If no bus is connected, the e ffective room operating mode of the room controller
depends 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:
Local
Controller
Window contact
DI
Presence detector
DI
Room unit
PPS2
• The effects of Priority 1 and Priority 2 are similar in nature to the states , which
apply continuously
• The Priority 3 influences are treated as events .
The key point in time 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.
If there is no bus connection, the controller assumes the following defaults:
• Use
= Building in use
• Occupancy = Occupied
RXB (KNX) application library
Room operating modes
Prio
1.
3.
3.
FNC Description of functions for FC-10, FC-11, FC-12
CM110385en_05
28 Feb 2009

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