Help with modbus TCP/IP Client "Talking" to Codesys V3.5

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Hi @thasamm,
Are you using SP16 or higher? If so, CODESYS suffered some changes, so try this:

  1. Check the “Discrete Bit Areas” box under ModbusTCP_Slave_Device > General > Configured Parameters and write the number of Coils and Discrete Inputs you need, as shown in the image below.

    CODESYS_general_1
    CODESYS_general_11029×416 28.9 KB

  2. Map the variables (using Coils and Discrete Inputs).

    CODESYS_mapping_2
    CODESYS_mapping_21165×678 42.8 KB

  3. Map these variables in FIO.

    FIO_mapping
    FIO_mapping1376×359 48.7 KB

We’ll release a tutorial regarding these alterations. Meanwhile, let me know if this worked for you.

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