S7-200 ADC module EM231

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em231

Hi

This module from siemens have very bad conversion accuracy(resolution is 12 bit but accuracy is 6 bit!!),many bits changing ,is there anyway to filter ADC output?

Please help me to get more accurate result from the ADC.
 

s7-200 em231

I usually use this module and it works OK.
Check your hardware and offset, gain calibaration.
 

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