Modbus TCP Read/Write

Runtime
poix
2017-02-01
2017-02-10
  • poix

    poix - 2017-02-01

    I have a Wago PLC and would like to connect with modbus TCP.
    It is possible to create READ/WRITE variable?

    Gianni

     
  • poix

    poix - 2017-02-02

    I use the function FC23 but i can't use the same variable in read and write

    Gianni

     
  • TiakTiak

    TiakTiak - 2017-02-02

    Hi Poix.

    I had the same problem that I needed to read and write to the same variable from an HMI using ModbusTCP.
    But unfortunately, it seems that this is not possible anymore in Codesys 3.5.
    In my solution, i changed the driver to OPC UA, but this might nog be possible for you.

    Jesper

     
  • poix

    poix - 2017-02-02

    Thank's for your replay, but I have to connect to a Wago PLC.

    Gianni

     
  • jessejamescox

    jessejamescox - 2017-02-10

    May be possible to use Network Variable instead of MB protocol. CoDeSys doesnt handle RW variables in MB registers any longer.

     

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