Technical data


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.
Note: If the time schedule switches from Comfort to Economy,
but the presence detector is still active (room occupied), the
thermostat continues to work in Comfort mode for the period of
occupancy.
1) RDF600KN SW version < V1.8 works like RDF301… with the operating
mode switchover contact as window contact or presence detector.
If a time schedule via bus is present, e.g. from central control unit, then the Auto
Timer mode is active. The thermostat automatically changes between Comfort
and Economy according to the time schedule via bus.
The display shows the Auto Timer mode symbol along with the symbol for the
effective room operating mode (Comfort or Economy ).
By pressing the operating mode button, you can change to another operating
mode.
Automatic fan is the default fan speed in Auto Timer mode.
Each time the time schedule sends a new operating mode (switching event), the
operating mode of the thermostat is set back to Auto Timer mode. This is to assure
that the room temperature is maintained according to the time schedule.
If the time schedule sends Precomfort mode, then this mode will be transformed
either into Economy (factory setting) or Comfort (selectable via parameter P88).
No intervention is possible neither by the user nor by an operating mode switch-
over contact, if Protection mode is set by the time schedule. OFF flashes on the
display when the user presses a button.
The operating mode can be selected locally via the operating mode button.
The behavior of the operating mode button (user profile) can be defined via
parameter P02, factory setting is P02 = 1.
P02 Without time
schedule
With time sche-
dule via bus
Description
1 

• Switching manually between 2 modes, Economy is not
available (factory setting).
• Suited for hotel guest rooms or commercial buildings.
• If a time schedule via bus is available, then the Comfort
mode can be temporarily extended (see below).
2  
  
• Switching manually between 3 modes.
• Suited for homes and rooms where manual switching to
Economy mode is desired.
Auto Timer mode
with time schedule via
bus
Behavior when bus
sends new operating
mode
Precomfort via bus
Behavior when bus
sends
Protection
Availability
of Economy
mode
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Siemens RDF301, RDF301.50..., RDF600KN Basic documentation CE1P3171en
Building Technologies Functions 2014-05-23