using ETCSlave as an FB's inout parameter

  • alejho

    alejho - 2019-06-28

    Hi all,
    I imported the ESI file of my device (it's an inverter) in my project.
    Automatically an ETCSlave instance was generated by the system.

    To manage this inverter I would like to create an FB that accept as inout the whole ETCSlave but, internally in my FB, I don't know how to handle the in/out of my ETCSlave.

    I tried with the pointers to input/output data (".InputData" and ".OutputData") but it seems that I just have read access in this way (may be I'm wrong!)

    There is any way to do this?
    Thank you in advance for any kind of help!

  • Anonymous - 2019-07-05

    Originally created by: rickj

    Define an input parameter (eg Slave) of type ETCSlave. he inside the FB you an access the ETCSlave instance using Slave.Parameter, Slave.Method(...), etc.

  • alejho

    alejho - 2019-07-10

    Thank you for your answer...of course it's what I tried to do!
    The point is that if the slave has (suppose) a given ethercat i/o mapping:


    It seems there's no way to access the i/o data of the ETCSlave passed as in/out parameter at the FB from inside the FB itself.

    It's not difficult to find a workaround for this...but I would like to create an FB that hide all the implementation details to the programmers that will use it in the future!
    Thank you again!


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