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
5.5.5 Local control of room operating mode with a room unit
Room unit
PPS2
Central
(Synco controller)
Local
1.
2.
3.
DI
DI
3.
Controller
3.
Prio
1.
Central (ACS)
0.
The
/Auto button on the room unit can be used like a
presence button.
The room user can enable or disable HVAC control.
The room unit is connected to the PPS2 interface on the room controller.
It displays the Effective room operating mode in a simplified form, and can also be used
to change it.
State Description
Auto Effective room operating mode is Comfort.
Reduced operation in the room, dependent on priority 1, 2 and 3
influences. The
Effective room operating mode is Precomfort,
Economy,
or Protection.
 The change in the Effective room operating mode is event-driven at the moment
when the button on the room unit is pressed.
 The Effective occupancy can cause the Effective room operating mode to change
again
 last command wins.
The table below shows the effect of the
/Auto button on the Effective room operating
mode
of the room controller.
Existing Effective
room op. mode
Room unit
display
Manual operation of
/Auto button
New Effective room
operating mode
Comfort Auto

Precomfort
if room operating mode from
schedule
=
Comfort or Precomfort.
Economy
if room operating mode from
schedule
=
Economy.
Precomfort  Auto Comfort.
Economy  Auto Comfort for Temporary
Comfort period
1)
.
Protection  Auto Protection, unchanged.
Key:
 Auto means: "changes to Auto ".
1)
Comfort mode is active for the predefined Temporary Comfort period (see page
103). The room controller then returns to
Economy.
Effective room operating
mode