Siemens Simatic ET 200SP Manual page 17

Smoothing
The individual measured values are smoothed by filtering. The smoothing can be set in
4 levels.
Smoothing time = number of module cycles (k) × cycle time of the module.
The following figure shows how many module cycles it takes for the smoothed analog value
to approach 100%, depending on the configured smoothing. This applies to every signal
change at the analog input.
①
②
③
④
Image 4-1
Interference frequency suppression
Suppresses the interference affecting analog input modules that is caused by the frequency
of the AC voltage network used.
The frequency of the AC voltage network can negatively affect the measured value, in
particular when measuring in the low voltage range and with thermocouples. With this
parameter, the user specifies the line frequency that is predominant in the plant.
Analog input module AI 2xU ST (6ES7134-6FB00-0BA1)
Manual, 12/2015, A5E36104728-AA
No smoothing (k = 1)
Weak (k = 4)
Medium (k = 8)
Strong (k = 16)
Smoothing for AI 2xU ST
Parameters/address space
4.3 Explanation of the parameters
17