S7-1200 CPU with SM1231 module: how to receive analog signal from ABB ACS800 inverter?

Hello All,

I don't want to open new topic as this one looks similar to mine problem.

I have S7-1200 CPU with SM1231 module and I want to receive analog signal from ABB ACS800 inverter. I made connection as on attached drawing and I have very big signal fluctuations and signal has some offset (e.g. instead of 250 A I have about 180 A). I need your advice how to properly make all connections on SM module to make signal clear?

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Split from SM 1231 AI4 4-20mA issue.

 Hello, maybe try to connect 0V from power supply to your input module - and ABB - or try like in these example 2 wire:

Szkodnik

Hello All,

I don't want to open new topic as this one looks similar to mine problem.

I have S7-1200 CPU with SM1231 module and I want to receive analog signal from ABB ACS800 inverter. I made connection as on attached drawing and I have very big signal fluctuations and signal has some offset (e.g. instead of 250 A I have about 180 A). I need your advice how to properly make all connections on SM module to make signal clear?