Operating Instructions

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Siemens RXB (KNX) Applications library CLC and RAD description of functions for CC-02 CM110384en_04
Building Technologies Room operating modes 21 Sep 2010
5.4.3 Central control of the room operating mode via the
schedules Use and Occupancy
Third-party S-mode does not support these schedules. If nevertheless used, the room
controller may produce errors.
5.4.4 Central and local control of room operating mode based
on occupancy
Presence detector
PPS2
S
Central Local
1.
3.
S
DI
S
S
DI
3.
Controller
1.
3.
Prio
3.
S
S
A presence detector detects the presence of people in
a room.
It controls the room operating mode of a room controller
while the building is in use. Outside the building-in-use
period, it is disabled.
The presence detector has two states:
State Description
Occupied  Room is occupied.
 Room controller switches to Comfort.
Unoccupied  Room is not occupied.
 Room controller switches to Economy or Precomfort.
 The change in the Effective room operating mode is event-driven at exactly the time
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  last command wins.
Presence detector New Effective room operating mode
 Occupied
(people enter room)
Precomfort
 Unoccupied
(people leave room)
Precomfort if room operating mode from schedule
=
Comfort or Precomfort
Economy
if room operating mode from schedule
=
Economy.
Key:
 Occupied means: "changes to occupied ".
The presence detector is connected directly to a digital input on the room controller
(see page 102); alternatively an EIB/KNX presence detector connected to the EIB/KNX
bus may be u
sed (see diagram below).
The two inputs are OR-linked: If one signals presence, presence applies.
Effective room operating
mode
Presence detecto
r