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Serial MODBUS Problems on Do More

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  • Serial MODBUS Problems on Do More

    So I have a square d energy meter on two wire rs485 ID 1, it works fine, I put a Square D PM210 on the network, Im getting an exception Response of 2, anyone know why?

    Thanks


  • #2
    Could be any number of reasons.

    Did you take the termination resistor off of the first meter and more it to the second meter and is the termination turned on at the Do-more?
    If you have an urgent issue, please contact AutomationDirect's Technical Support team.

    AutomationDirect.com Technical Support: 1(800) 633-0405 or (770) 844-4200 Email Tech Support

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    • #3
      Is it possible that both devices have same address? Or that device registers have different addresses and you’re using the register setup from one device trying to access a register in the other device? The modbus offers a range of addresses, but devices do not use the entire range.
      Last edited by Alexandru; 12-19-2018, 09:03 AM. Reason: Just a thought

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      • #4
        Exception Response 2 is Illegal Data Address.
        Are you saying:

        ...that you have ONE or TWO power meters?
        ...that ONE works fine on the network and the SECOND returns the error when connected to the network where the FIRST meter is already functional?
        ...that ONE works fine on the network and the FIRST returns the error when the SECOND meter is connected to the network where the FIRST meter is already functional?

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        • #5
          The meter actually wanted the 4001 address and not the 1 in the MRX. So it would actually be 44001, weird. Thanks thouogh

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