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Siemens Basic Documentation RVP340, RVP350, RVP351 CE1P2545en
Building Technologies 20 Communication 15.03.2011
20 Communication
20.1 Interplay with room units
20.1.1 General
The room temperature acquired by a room unit is fed to controller terminal A6. If
the room temperature signal delivered by the room unit shall not be included in the
control functions, the respective source must be selected (operating line 65). In
that case, the other room unit functions are maintained.
The controller detects the connection of an inadmissible room unit and identifies
it as an error for display on operating line 50 (error code 62)
Errors the room unit detects in itself are displayed by the controller on operating
line 50 (error code 61)
20.1.2 Interplay with room unit QAW50
The QAW50 can act on the controller as follows:
Overriding the heating circuit’s operating mode
Readjustment of room temperature
For that purpose, the QAW50 has 3 operating elements:
Operating mode selector
Economy button (also termed presence button)
Knob for room temperature readjustments
From the QAW50, the operating mode of the heating circuit can be overridden.
This is accomplished via the operating mode selector and the economy button.
To enable the room unit to act on the controller, the latter must satisfy the following
operating conditions:
Heating circuit operating mode AUTO
No holiday period active, no manual control
The operating mode selector of the QAW50 acts on the controller as follows:
Operating mode
of QAW50
Operating mode of heating circuit controller
; optional temporary overriding with economy button
Continuously NORMAL or continuously REDUCED
heating, depending on the economy button
Protection mode
With the knob of the QAW50, the room temperature setpoint for NORMAL heating
can be readjusted by ±3 °C.
The QAW50 does not affect adjustment of the room temperature setpoint on the
controller’s operating line 1.
.
General
Overriding the heating
circuit's operating
mode
Knob for room tempe-
rature readjustments
90


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