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
66/166
Siemens
Building Technologies
Presence detector
No presence detector
Unoccupied
(people leave room)
Occupied
(people enter room)
Key: " Occupied" means "changes to Occupied"
5.6.3

Local control of room operating mode with a room unit

Local
Controller
Prio
1.
DI
3.
DI
3.
PPS2
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 mode in the room, depending on the Priority 1 or 3 influences:
Effective room operating mode is Precomfort, Economy or Protection.
• The change in the effective room operating mode is event-driven, the key factor
being the moment when the button on the room unit is pressed.
• The presence detector (which is also Priority 3) can cause the effective room
operating mode to change again
The table below shows the effect of the /Auto button on the effective room operating
mode of the room controller.
Display on
room unit
Auto
RXB (KNX) application library
Room operating modes
New effective room operating mode
Comfort (default)
Economy
Comfort
The /Auto button on the room unit can be used like an
occupancy button.
The room user can use it to switch the HVAC system "on" or
"off" .
the last command always applies.
Manual operation of
the /Auto-button
Auto
Auto
Auto
FNC Description of functions for FC-10, FC-11, FC-12
New effective room
operating mode
Precomfort ,
if effective occupancy
= Occupied
Economy ,
if effective occupancy
= Unoccupied
Comfort
Comfort during Temporary
1)
Comfort period
Protection, unchanged
CM110385en_05
28 Feb 2009