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Siemens Building Technologies Basic documentation RVD240 CE1P2384en
HVAC Products 24 Function block PPS parameter 27.05.2004
24 Function block PPS parameter
This function block defines the devices and the actions on the PPS. The RVD240 is the
master; the connected devices (max. 2) are the slaves.
24.1 Operating lines
Line Function, parameter Unit Factory setting Range
156 Active slaves on the PPS Display function
158 Actions with 1 room unit and 2 heating circuits 0 0...5
24.2 Suitable devices
The following devices can be connected to the PPS terminals:
• Room unit QAW50 or QAW50.03 (addressable)
• Room unit QAW70 (addressable from software version 1.20)
• Room sensor QAA10 (not addressable)
Each of these units has an address. It can be called up on operating line 156 using
buttons
and :
Displayed address Room unit
1 82 Room unit QAW50 or QAW50.03
1 83 Room unit QAW70
1 90 Room temperature sensor QAA10
--- --- No device present
The example given in the above table uses address 1.
For each of the 2 heating circuits, a room unit can be connected to the RVD240. One of
the 2 units must be addressable however. The combination of 2 nonaddressable units
(e.g. QAW50 or QAA10) is not permitted.
This means:
• The first room unit can be a QAA10, QAW50, QAW50.03 or QAW70
• The second room unit must then be a QAW50.03 or QAW70, addressed with 2
24.3 Impacts of a room unit on the heating circuits
If only one room unit is connected to the PPS, its actions on the 2 heating circuits must
be defined:
Setting
Room unit function
0 1 2 3 4 5
The actual room temperature of the
room unit acts on the flow tempera-
ture control in heating circuit(s) ...
1 1 2 2 1 and 2 1 and 2
Switching program and room unit
settings act on heating circuit(s) ...
1 1 2 2 1 1
Display of flow temperature in the
heating circuit ...
1 1 2 2 1 1
Operating mode, operation level and
holiday program of the room unit act
on the heating circuit(s) ...
1 1 and 2 2 1 and 2 1 1 and 2
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