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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 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 table below shows
Effective occupancy as a function of the occupancy time
schedule and the presence detector.
Rule: Occupied takes precedence over unoccupied. If
either the schedule or the
presence detector transmits occupied , the room is occupied.
Presence detector Occupancy schedule Effective
occupancy
No schedule. Occupied.
Occupied. Occupied.
Standby. Standby.
No presence detector
Unoccupied. Unoccupied.
No schedule. Unoccupied.
Occupied. Occupied.
Standby. Standby.
Unoccupied
(no people
present).
Unoccupied. Unoccupied.
No schedule. Occupied.
Occupied. Occupied.
Standby. Occupied.
Occupied
(people present).
Unoccupied. Occupied.
•
The Effective room operating mode can be changed by the Effective occupancy only
during the building-in-use period (defined by the Use schedule).
•
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 Æ last command wins.
Effective occupancy Effective room operating
mode
Æ Occupied. Comfort.
Æ Standby. Precomfort.
Æ Unoccupied. Economy.
Key:
Æ Occupied means: "changes to occupied ".
The following S-mode communication object is used for schedule usage
from a building
automation and control system:
Time scheduler Occupancy (input communication object)
Flags
R W C T U Type Receive timeout States
0 1 1 0 0 20.003
DPT_OccMode
Yes 0 = Occupied
1 = Standby
2 = Unoccupied
Effective occupancy
Effective room operating
mode
KNX
R
CO