Presence detector
Effective
room operating mode
Presence detector
50/166
Siemens
Building Technologies
5.4.3
Central control of room operating mode via the Use and
Occupancy time schedules
These time schedules are not supported by third-party S-mode. If they are used
nevertheless, this can cause room controller errors.
5.4.4
Central and local control of room operating mode
based on occupancy
Central
Local
Controller
Prio
S
1.
DI
1.
3.
S
S
3.
DI
3.
PPS2
3.
S
The presence detector has two possible states:
State
Description
• The room is occupied
Occupied
• The room controller switches to Comfort
• The room is not occupied
Unoccupied
• The room controller switches to Economy or Precomfort
• The change of effective room operating mode is event-driven, the key factor being
the moment when the effective occupancy changes.
• The room unit or Temporary Comfort mode (both Priority 3) can cause the effective
room operating mode to change again
Presence detector
Unoccupied
(people leave room)
Occupied
(people enter room)
Key: "
Occupied" means: "Changes to Occupied"
The presence detector is connected directly to a digital input on the room controller
(see page 126); alternatively an EIB/KNX presence detector connected to the EIB/KNX
bus may be used (see diagram below).
The two inputs are OR-linked: If one signals presence, presence applies.
RXB (KNX) application library
Room operating modes
A presence detector detects the presence of people in
S
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.
S
the last command always applies.
New effective room operating mode
Precomfort
Precomfort if room operating mode from schedule
= Comfort or Precomfort
Economy if room operating mode from schedule
= Economy.
FNC Description of functions for FC-10, FC-11, FC-12
CM110385en_05
28 Feb 2009