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Regarding " point value may not be reliable" problem in MODBUS IP communication

  • Hi,
    Am using MODBUS IP datasource to poll my 3 slave devices. At random time, it shows " Point value may not be reliable" for either of the slave devices and it does not return to working. Am monitoring the server ( PC where I have installed mango) from remote place using TeamViewer. I have been wondering whether the two LAN ports in the server ( one for MODBUS IP and other for Internet) is the reason for the problem. Kindly help me with this.

  • Sounds like it could be more of a hardware issue than software, or at least something external is involved. You could try using wireshark to trace the messages, or mention the messages of any events that the data source is raising.