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Siemens RDF301, RDF301.50, RDF600KN Basic documentation CE1P3171en
Building Technologies Functions 2012-10-04
3.2.1 Different ways to influence the operating mode
The operating mode can be influenced by different interventions.
The source of the effective room operating mode state can be monitored using the
"Cause" diagnostic data point in the ACS tool, operator unit RMZ792 or web server
OZW772 / 775.
Source Description Value of DP "Cause"
Operating mode is not Auto Timer
No time schedule via bus
Room operating mode selector
(preselection)
Temporary Comfort extension is active
“Timer” function
Local operation
via operating
mode button
Operating mode switchover contact
Room operating mode contact
"Window state" sent via bus
Room operating mode contact
Bus command
KNX
R
Room op. mode
Time schedule available via bus
local operating mode is set to Auto Timer
Time schedule sends Protection mode via bus
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 always
command an operating mode independent of all other settings or
intervention via bus and local input.
Protection mode via bus
from time schedule
Protection mode, sent by a time schedule, has priority 2.
It cannot be overridden by the user nor by an operating mode
switchover contact.
Operating mode
switchover contact
If the contact is closed, the operating mode changes to Economy.
This overrides the operating mode on the thermostat.
"Window state" via bus
"Window state" sent via bus has the same effect as the operating
mode switchover contact.
Note: Only one input source must be used, either local input
X1/X2 or KNX bus.
Operating mode button The user can switch the operating mode using the operating
mode button.
Operating mode via bus The operating mode can be changed via bus
Temporary extended
Comfort mode via
operating mode button
The operating mode can be temporarily set from Economy to
Comfort by pressing the operating mode button, if...
– Economy was sent via bus
– extended Comfort period >0 (parameter P68)
The last intervention wins, either locally or via bus
Time schedule via bus
The operating mode sent via bus can be overridden by all other
interventions. Exception: Protection mode has priority 2.
Source for change of
operating mode
ACS
Priority of operating
mode interventions
14


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