Modbus Slave : Modbus RTU over TCP and Modbus TCP

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  • August 15, 2024 at 3:57 am #15128
    rapidscadaaks
    Participant

    Hi

    In my setup there are various devices setup and they are communicating properly with Rapid Scada.
    I also have Modbus Slave setup to send data to HMI and here I have a problem.
    The data output of Rapid Scada is in the format of Modbus RTU over TCP and not Modbus TCP. Due to this, HMI is unable to establish connection and poll data.
    I have tested the output of Rapid Scada using ModbusPoll and it works when I use the protocol as Modbus RTU over TCP. When I change to Modbus TCP, it does not work. In case of Modscan 32, since there is no option of Modbus RTU over TCP, connection is not possible.
    Please help.
    thanks in advance

    August 15, 2024 at 7:48 am #15129
    Mikhail
    Moderator

    Hi,

    Open Custom Options of the Modbus Slave’s communication line. Add a TransMode option equals to TCP as shown at https://ibb.co/GCzsnyV

    August 15, 2024 at 12:34 pm #15132
    rapidscadaaks
    Participant

    Hi Mikhail

    Many thanks for the input. now it works.

    Best

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