Siemens RWF 50.2, Installation, Use And Maintenance Instructions

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8.1 Analog input
InP1
An analog input is available.
ConF

InP

InP1

Parameter Value/
selection
Description
1 Resistance thermometer Pt100, 3-wire
2 Resistance thermometer Pt100, 2-wire
3 Resistance thermometer Pt1000, 3-wire
4 Resistance thermometer Pt1000, 2-wire
5 Resistance thermometer LG-Ni1000, 3-wire
6 Resistance thermometer LG-Ni1000, 2-wire
7 0...135 Ohm
15 0...20 mA
16 4...20 mA
17 DC 0...10 V
18 DC 0...5 V
Sensor type
SEn1
Sensor type
19 DC 1...5 V
Correction of
measured value
OFF1
Offset
-1999...
0...
+9999
Using the measured value correction (offset), a measured value can be
corrected to a certain degree, either up or down
Example:
Measured Offset Displayed values
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 not correctly used, inadmissible values of the
control variable can be produced. Measured value corrections must therefore be made within certain limits
only.
Start of display
SCL1
Scale low level
-1999...
0...
+9999
End of display
SCH1
Scale high level
-1999...
100...
+9999
In the case of a measuring transducer with standard signal, the physical
signal is assigned a display value here
Example: 0…20 mA = 0…1500 °C
The range of the physical signal can be crossed by 20%, either up or down,
without getting a signal informing about the crossing
Filter time constant
dF1
Digital filter
0.0...
0.6...
100.0...
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 are captured
after a time corresponding to the filter time constant
dF
(2 x
dF
: approx. 59%;
5 x
dF
: approx. 96%)
When the filter time constant is great:
- Great attenuation of interference signals
- Slow response of actual value display to changes of the actual value
- Low limit frequency (low-pass filter)
1 Degrees Celsius
2
Degrees
Fahrenheit
Temperature unit
Unit
Temperature unit
Unit of temperatures
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