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    PLC configuration _ no input signals received

    PLC configuration _ no input signals received

    RedOne
    Established Member

    Hello all,

    I am using an L40 PLC, and I have the problem that I don't receive the inputs signals, but when I force the outputs signals, I can see the signals comming on the module. Do you know what can be the issue, that I don't see the inputs signals on the PLC configuation ? 

    Thank you!

    2 REPLIES 2

    Thorsten_Brach
    New Contributor

    Are the inputs used/called in your program ? ( Normally the I/Os are only updated, when they are used/called  )

    Or you must activate the "Update unused I/Os" option in the target settings :


    2024-03-21_13h07_14.png

     

    Thanks, this solution helped. I don't understand do, why I had to check this, because the IO's were used. 

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