Local Control Of Room Operating Mode With A Room Unit - Siemens Desigo RXB Technical Manual

Room unit
Effective room operating
mode
Existing Effective
room op. mode
Comfort
Precomfort
Economy
Protection.
50/140
Siemens
Building Technologies
5.4.5

Local control of room operating mode with a room unit

Central Local
Controller
Prio
S
1.
DI
1.
3.
S
S
3.
DI
3.
PPS2
3.
S
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 and 2
influences as well as the Room operating mode schedule.
The Effective room operating mode is Precomfort, Economy, or
Protection.
• The change in the Effective room operating mode is event-driven, the event being
the moment when the button on the room unit is pressed.
• The Effective occupancy or Temporary Comfort mode (both priority 3) can cause the
Effective room operating mode to change again
The table below shows the effect of the
mode of the room controller.
Room unit
display
Auto
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.
RXB (KNX) Applications library
Room operating modes
The /Auto button on the room unit can be used like a
presence button.
S
The room user can enable or disable HVAC control.
S
/Auto button on the Effective room operating
Manual operation of
/Auto button
Auto
Auto
Auto
CLC and RAD description of functions for CC-02 CM110384en_03
last command wins.
New Effective room
operating mode
Precomfort
If room operating mode from
schedule
= Comfort or Precomfort.
Economy
If room operating mode from
schedule
= Economy.
Comfort.
Comfort for Temporary
1)
Comfort period .
Protection, unchanged.
28 Feb 2009