04/10 MN04020001Z-EN
Parameter menu (PAR)
77
Filter time constant
The filter time constant can be used to filter out disturbance with
analog signals.
In the default setting the filter time constant is active with 0.1
seconds. The time value set here applies to 63 % of the maximum
analog signal (+10 V, 20 mA).
You can deactivate the filter time constant by setting the
parameter to 0.0:
P2.4 (AI1) = Filter time constant, analog input AI1
P2.8 (AI2) = Filter time constant, analog input AI2
P4.4 (AO) = Filter time constant, Analog output AO
h
Long filter times lead to a delay in the analog signal
processing.
Figure 71: Filter time constant
a Analog signal with faults (unfiltered)
b Filtered analog signal
c Filter time constant at 63 % of the set value
P2.4 AI1
P2.8 AI2
t [s]
100 %
63 %
AI2
a
b
c
P4.4 AO
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