Siemens Simatic S7-1500 CPU 1512C-1 PN User Manual page 192

Analog value processing
C.1 Conversion method
The following figure shows how this works using a 50 Hz interference frequency suppression
as an example. A 50 Hz interference frequency suppression corresponds to an integration
time of 20 ms. The analog on-board I/O supplies a measured value to the CPU every
millisecond within the integration time.
Figure C-3
192
Interference frequency suppression 50 Hz
CPU 1512C-1 PN (6ES7512-1CK01-0AB0)
Manual, 12/2017, A5E40898741-AA