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Siemens RDF800KN.., RDF800KN/VB, RDD810KN/NF Basic documentation CE1P3174en
Smart Infrastructure 2020-02-21
3.2.1 Influencing the operating mode
The operating mode can be influenced in different ways.
The source of the effective room operating mode state can be monitored using the
"Cause" diagnostic data point in the ACS tool, bus operator unit RMZ792-B or web
server OZW772.
Local operation
using operating
mode icon
· Operating mode is not Auto Timer
· No time scheduler using the bus
Room operating mode selector
(preselection)
· Temporary Comfort extension is active (P68 >0)
Timer function
· Window contact
Window switch
· Presence detector
Presence detector
Bus command
Room
operating mode
"Window state" sent using the bus
Window switch
· "Presence detector" sent using the bus
Presence detector
· Time scheduler available using the bus
à local operating mode is set to Auto Timer
· Time scheduler sends Protection mode using the
bus
à operating mode cannot be changed locally
Time switch
The following table shows the priorities of different interventions.
A lower number means a higher priority.
Priority Description Remark
Commissioning In parameter setting mode (highest priority), you can command an operating
mode independent of all other settings or intervention using bus and local input.
Protection mode
using the bus from
time scheduler
Protection mode is, sent by a time scheduler
It cannot be overridden by the user, or by the window contact or presence
detector.
Window contact If the contact is closed (i.e. window open), the operating mode changes to
Protection. This overrides the operating mode on the thermostat.
"Window state"
using the bus
"Window state" has the same effect as the local window contact.
Note: Only one input source must be used, either local input X1/X2 or KNX bus.
Presence detector If the contact is closed (room occupied), the operating mode changes to Comfort.
This overrides the operating mode on the thermostat. When the contact (room
unoccupied) is open, the thermostat is set back to Economy mode.
Presence detector
using bus
"Presence detector" has the same effect as the local presence detector.
Operating mode
icon
Touch the icon to select the operating mode using +/–.
Operating mode
using the bus
The operating mode can be changed using the bus.
Temporarily
extended Comfort
mode using
operating mode
icon
Touch the icon to set operating mode from Economy to Comfort temporarily
if...
– Economy was sent using bus
– Extended Comfort period > 0 (P68)
The last option selected is always used, either locally or using bus.
Time scheduler
using the bus
The operating mode sent using the bus can be overridden by all other
interventions. Exception: Protection mode has priority 2.
Note: If the time scheduler switches from Comfort to Economy mode, but the
presence detector is still active (room occupied), the thermostat continues to
work in Comfort mode for the period of occupancy.
Source for change of
operating mode
ACS
Priority of operating
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