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    Modbus RS485: Acknowledge Event

    Mango Automation general Discussion
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    • H
      hayden_AUS
      last edited by

      Hi,
      I have a Modbus RTU Data source, and are getting the following error from most of the 5 Slaves on the BUS, but only from register 0:

      Urgent 'Modbus RS485': Cool Room Temperature — Modbus RS485: Acknowledge

      The slaves only have two registers being polled, 0 and 1.
      Update period: 30 seconds
      Timeout: 1000ms
      Contiguous batches only

      The event lasts only 0 millseconds

      Has anyone seen this before?

      Hayden

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      • H
        hayden_AUS
        last edited by

        So it's a standard Modbus response:

        05 ACKNOWLEDGE

        The slave has accepted the request
        and is processing it, but a long duration
        of time will be required to do so. This
        response is returned to prevent a
        timeout error from occurring in the
        master. The master can next issue a
        Poll Program Complete message to
        determine if processing is completed

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