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Siemens
RXB (KNX) Applications library
CLC and RAD description of functions for CC-02 CM110384en_03
Building Technologies
Room operating modes
28 Feb 2009
•
The change in the
Effective room operating mode
is event-driven at exactly the time
when the
Effective occupancy
changes.
•
The room unit (which is also priority 3) can cause the
Effective room operating mode
to change again
Æ
last command wins.
Presence detector
New
Effective room operating
mode
No presence detector
Comfort
(default)
Æ
Unoccupied
(people leave room).
Economy.
Æ
Occupied
(people enter room).
Comfort
Key:
Æ
Occupied means: "changes to occupied ".
5.6.3
Local control of room operating mode with room unit
Room unit
PPS2
Local
1.
DI
DI
3.
Controller
3.
Prio
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 or 3 influence:
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 presence detector (which is also priority 3) can cause the
Effective room
operating mode
to change again
Æ
last command wins.
The table below shows the effect of the /Auto button on the
Effective room operating
mode
of the room controller.
Effective room operating
mode
Effective room operating
mode