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Proworx error: "323 - device not listening" followed by "328- driver turned off".

Issue:

    Unable to connect to PLC.  Error is displayed.

Product LIne:

   Proworx Nxt or Proworx 32

Environment:

   Windows Operating System

Cause:

     Problem with the Modbus Plus timeout or connection.

Resolution:

 1/    Go to the Communications Setup and increase the Modbus Plus timeout.
  2/   Troubleshoot the Modbus Plus network.
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