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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12
CM110385en_05
Building Technologies
Temperature measurement
28 Feb 2009
The sensor is parameterized under fan control for tool architectural reasons:
Click
Fan control, Temperature sensor B1
Select
Fan control, Temperature sensor B1
(see page 113).
HandyTool
See Parameters in the last column of the table below
Parameter
Short name
Basic setting
Temperature sensor
No sensor
FNC08: Supply air (cascade)
*092
Return air
0
Room
1
Supply air (cascade)
2
Only meas val acquisition 3
No sensor
255
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.
PPS2 (CP+, CP-)
B1
QAX3...
RXB2...
QAA24
103
8
5Z
1
4
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.
Note
ETS3
Professional
ACS
Service
Notes
