Siemens RWF55.51A9 User Manual

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Building Technologies Division User Manual RWF55... CC1U7867en
Infrastructure & Cities Sector 8 Configuration ConF 05.11.2013
8.3 Analog input InP3
This input is used to acquire the outside temperature.
ConF  InP  InP3 
Parameter Value/
selection
Description
Sensor type
SEn3
Sensor type
0 Switched-off
1 Resistance thermometer Pt1000 in 2-wire circuit
2 Resistance thermometer LG-Ni1000 in 2-wire circuit
Function
FnC3
0 No function
1 Weather-compensated setpoint
Correction of
measured value
OFF3
Offset
-1999...
0...
+9999
Using the measured value correction function (offset), a measured value can
be corrected by a certain amount, either up or down.
Example:
Measurement value Offset Display value
294.7 +0.3 295.0
295.3 -0.3 295.0
Caution!
Measured value correction:
To make the calculation, the controller uses the corrected value (displayed value). This value does not
represent the value acquired at the point of measurement.
If the measured value correction function is used incorrectly (e.g., overcompensation of measured values
 measurement error only present temporarily), this may lead to undesirable plant states.
Filter time constant
dF3
Digital filter
0.0...
1278...
1500.0...
Is used to adapt the digital 2nd order input filter (time in s; 0 s = filter off).
If the input signal changes abruptly, about 26% of the change is captured
after a time corresponding to the filter time constant dF (2 x dF: approx. 59%;
5 x dF: approx. 96%).
If the filter time constant is large:
- High attenuation of interference signals
- Slow response of actual value display to changes in the actual value
- Low limit frequency (low-pass filter)

Siemens RWF55.51A9 Specifications

General

Brand	Siemens
Model	RWF55.51A9
Category	Controller
Language	English