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  1. Hi everyone, I had encountered a silly issue. There is one of S400 AI module connected to S300 AI module. After power on, the reading at PROface(S300 HMI) show half compared with SCADA WinCC(S400 HMI). I had tried to monitor the value from S7 manager reading is correct. Any idea to solve this issue ? The transmitter is 4-wire.    Br, Liew