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Siemens
RXB (KNX) Applications library
CLC and RAD description of functions for CC-02 CM110384en_03
Building Technologies
Room operating modes
28 Feb 2009
The state of the room controller (result of the logic OR operation) is mapped to the
building automation and control system via the following S-mode communication object:
Window contact output (Output communication object)
Flags
R W C T U
Type Send
heartbeat
States
1 0 1 1 0 1.019
DPT_WindowDoor
Yes
0 = Closed
1 = Open
Master/slave applications:
Bindings are required in S-mode to communicate to the master the window contact
state at the slave.
5.3.2
Central control of room operating mode via input from
the Use schedule
S
Central
Local
1.
2.
3.
S
DI
S
S
S
DI
S
3.
Controller
Prio
PPS2
3.
S
This schedule determines the overall period of time
for which the entire building is in use. Typically, it is
used for night setback throughout the building or for
long periods when the building is not in use.
When the building is not used, interventions of third
priority are disabled. This prevents demand signals
from being sent to the primary plant when e.g. a
security guard enters a room.
The table below shows the three possible occupancy states and the resulting Effective
room operating mode.
Switching state
Description
Effective room operating
mode
Building in use
•
Full availability of all plants.
•
Building enabled for use.
•
Priority 3 influences are
enabled
(schedule
occupancy,
presence detector, room unit, and
Temporary Comfort mode).
According to schedule
occupancy
, presence
detector, or room unit
Building not in use
•
Reduced availability of the plants.
•
Priority 3 influences are
disabled
(schedule
occupancy,
presence detector, room unit, and
Temporary Comfort mode).
•
Application:
For temporary vacancy.
The building must reach the
Comfort
temperature within hours.
Economy
Protection
•
Setpoints are at levels required to protect the
building.
•
Priority 3 influences are
disabled
(schedule
occupancy,
presence detector, room unit, and
Temporary Comfort mode).
•
Application: Extended building vacancy.
Protection
KNX
R
CO
Note
Effective room operating
mode
