Siemens Simatic S7-1500 CPU 1512C-1 PN User Manual page 195

Smoothing
The individual measured values are smoothed by filtering. The smoothing can be set in 4
levels and channel-selective in STEP 7 (TIA Portal).
Smoothing time = Smoothing (k) x configured integration time
The following figure shows the time it takes for the smoothed analog value to reach
approximately 100 % depending on the set smoothing. This is valid for all signal changes at
the analog input.
①
None (smoothing = 1 x integration time)
②
Weak (smoothing = 4 x integration time) *
③
Medium (smoothing = 16 x integration time) *
④
Strong (smoothing = 32 x integration time) *
* The smoothing time can increase by 1 x integration time.
Figure C-5 Smoothing time depending on the set smoothing level
The following table shows the time it takes for the smoothed analog value to reach
approximately 100 % depending on the set smoothing and the set interference frequency
suppression.
Table C- 2 Smoothing time depending on the set smoothing level and interference frequency suppression
Selection of the smoothing
(mean value generation from scan values)
None
Weak
Medium
Strong
CPU 1512C-1 PN (6ES7512-1CK01-0AB0)
Manual, 12/2017, A5E40898741-AA
Interference frequency suppression/smoothing time
400 Hz 60 Hz
2.5 ms 16.6 ms
10 ms 66.4 ms
40 ms 265.6 ms
80 ms 531.2 ms
Analog value processing
C.1 Conversion method
50 Hz 10 Hz
20 ms 100 ms
80 ms 400 ms
320 ms 1600 ms
640 ms 3200 ms
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