Wago 750-841 vs MW4096 and above

Codesys V2.3 🇬🇧
johndoe
2010-12-03
2010-12-04

  • johndoe - 2010-12-03

    Hi,
    on a Wago 750-841 PLC, I need to access MW4096 and above both via Modbus and via PLC.
    In a factory default PLC, trying to define a variable like this

    mw4096 AT %MW4096: WORD;

    I obtain the error Invalid address: '%MW4096'.

    The only solution I found is to change memory layout of PLC in this way:
    So, NOVRAM size is still 24 kB (0x4000 + 0x2000), but flags area grows from 8 kB to 16 kB (0x2000 -> 0x4000) and retain area decreases from 16 kB to 8 kB.
    Now I can access both via Modbus and via PLC up to MW8191.

    Is this procedure correct? Are settings right?

    Thanks

     

  • shooter - 2010-12-04

    will try but first i would say no not this way.

     

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