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Analog Value Preprocessing - Siemens CP 1243-1 PCC Operating Instructions Manual

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5.11.5.3

Analog value preprocessing

Depending on the data point type, the functions for analog value preprocessing described
below are supported.
Unipolar transfer
If unipolar transfer is enabled, negative values of analog inputs are corrected to zero.
Exception: The value -32768 / 8000
inputs is transferred. With a software input, on the other hand, all values lower than zero are
corrected to zero.
If mean value generation is active, this parameter has no effect.
Smoothing factor
Analog values that fluctuate quickly can be smoothed with this function.
The smoothing factors are calculated according to the following formula as with S7 analog
input modules.
where
y
= smoothed value in the current cycle
n
x
= value acquired in the current cycle n
n
k = smoothing factor
The following values can be configured for the module as the smoothing factor.
● 1 = No smoothing
● 4 = Weak smoothing
● 32 = Medium smoothing
● 64 = Strong smoothing
If mean value generation is active, this parameter has no effect.
Siemens Automation
CP 1243-1 PCC
Operating Instructions, 02/2015, C79000-G8976-C384-01
5.11 STEP 7 configuration of individual parameters
as fault ID for wire break of live zero hardware analog
h
Configuration and operation
49

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