Interference Frequency Suppression; Smoothing - Siemens SIMATIC ET 200SP HA Equipment Manual

Parameters
5.4 Explanation of the module/channel parameters
HART mode is only possible with a measuring range of 4 mA to 20 mA. HART communication is
not deactivated even at currents below 4 mA.
5.4.5

Interference frequency suppression

Definition
Suppresses the interference that is caused by the frequency of the AC voltage network used.
When HART operation is activated, interference frequency suppression of 10 Hz is
recommended to prevent the HART signal from influencing the analog value.
5.4.6

Smoothing

Definition
Compensates for measured value fluctuations.
The individual measured values are smoothed by filtering.
Description
Smoothing can be set in 4 levels.
Smoothing time = number of module cycles (k) x 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.
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AI 4xI 2-/4-wire HART ISOL HA
Equipment Manual, 07/2022, A5E50101523-AB