We have a WalChem 600 water treatment controller using a pH probe sensor. The controller turns acid and base feeder pumps on and off based on pH measurements. The controller sends data using TCP Modbus. I've added a Modbus TCP Client AOI to a DAF water treatment Studio 5000 program. When Modbus TCP Client AOI Enable Input is set to 1 the [X].sts.EN and [X].sts.Connected (Where [X] is the client's name) do not change from 0 to 1, as they should.
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