Averaging Analog Input & Pps2 Interface - Siemens Desigo RXB Technical Manual

Note
ETS3 Professional
ACS Service
HandyTool
Notes
Siemens
Building Technologies
The sensor is parameterized under fan control for tool architectural reasons:
Click Fan control, Temperature sensor B1 (see page 113).
Select Fan control, Temperature sensor B1 (see page 113).
See Parameters in the last column of the table below
Parameter
Temperature sensor
Return air
Room
Supply air (cascade)
Only meas val acquisition
No sensor
Only meas val acquisition: Use of the the signal: see "analog input B1", page 138.
7.1.3 Averaging analog input & PPS2 interface
In large spaces it can be useful to measure the room temperature in two locations and
to determine an average value. If both a QAX3... room unit and a QAA24 LG-Ni1000
sensor are connected to a controller, the measured room temperature is automatically
based on the average value from both sensors. The automatic detection feature
prevents miscalculation.
A QAX34 / QAX84 will display this average value.
QAA24
PPS2 (CP+, CP-)
B1
RXB2...
The average value is calculated from the two sensor readings.
• In order to determine the average value, the sensor must be configured as a room
temperature sensor
• The signal is not averaged in the case of return air sensors and KNX sensors.
RXB (KNX) application library
Temperature measurement
Short name
No sensor
FNC08: Supply air (cascade)
QAX3...
FNC Description of functions for FC-10, FC-11, FC-12
Basic setting
*092
0
1
2
3
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CM110385en_05
28 Feb 2009