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Siemens RDF800KN.., RDF800KN/VB, RDD810KN/NF Basic documentation CE1P3174en
Smart Infrastructure 2020-02-21
3.2.2 Communication example
The following example shows a typical application of a central time scheduler in
conjunction with local control of the room operating mode.
The room operating mode in the room of a building is determined by the time
scheduler. Window contact and presence detector are fitted in this room.
The following condition exists:
· The rooms are used and controlled by the time scheduler as follows:
– Night setback from 17:00 to 08:00 (Economy)
– Protection from 20:00 to 06:00
Application with "Window contact", "Presence detector" and time scheduler from
the central control unit.
In room operating mode, Comfort is possible between 6:00 and 20:00, based on
the time scheduler or occupancy period. Outside this timeframe, Protection mode
is maintained.
1. At 6:00 the central control unit sets the operating mode to Economy. (1)
2. In the morning, as soon as the presence is detected (8:00 – 12:00), the
operating mode switches to Comfort. (2)
3. When the user briefly opens the window, the operating mode switches to
Protection. (3)
4. In the afternoon the time scheduler sets the Comfort mode from 13:00 to
17:00. (4)
5. After 17:00 the room is still occupied and the operating mode remains in
Comfort (occupancy with presence detector). (5)
6. Later, people open the window and leave the room for a short time. The
operating mode switches to Protection as long as the window is open. (6)
7. As soon as the room is unoccupied the thermostat switches to Economy. (7)
8. At 20:00 the room is set to Protection according to the time scheduler. (8)
9. After this time, the occupancy detected by presence detector has no effect, as
the central time switch sets the thermostat to Protection. (9)
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