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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 following S-mode communication object is applicable when using the time
scheduler from a building automation and control system:
Time schedule
Use
(Input communication
object)
Flags
R W C T U
Type Receive
timeout
States
0 1 1 0 0 20.002
DPT_BuildingMode
Yes
0 = In use
1 = Not in use
2 = Protection
5.3.3
Central and local control of room operating mode
based on occupancy
S
Central
Local
1.
2.
3.
S
DI
S
S
S
DI
S
3.
Controller
Prio
PPS2
3.
S
The
effective occupancy
is determined by the
Occupancy
time schedule and the presence detector.
It controls the room operating mode of a room
controller throughout the period when the building is in
use.
The central time schedule transmits the anticipated occupancy of a room or group of
rooms. It controls the room operating mode of a room controller throughout the period
when the building is in use. Outside the building-in-use period, the time schedule is
disabled.
The time schedule can be used, for example, by a building tenant to specify the
occupancy times applicable to that tenant’s own rooms.
The
Occupancy
scheduler
has three possible states:
State
Description
Occupied
•
Occupants expected
•
The room controller switches to
Comfort
Standby
•
Occupancy is probable; the room must be ready for use shortly
(
Comfort
temperature)
•
The room controller switches to
Precomfort
Unoccupied
•
No occupants expected
•
The room controller switches to
Economy
A presence detector detects the presence of people in a room.
It controls the room operating mode of a room controller throughout the period when
the building is in use. Outside the building-in-use period, it is disabled.
KNX
R
CO
Occupancy
time schedule
Presence
detector
