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About dbozic

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    Hi, I am New!

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  1. S7 300 Profibus fault

    I had a problem of profibus node going out of communication for very short time (matter of milliseconds). It wasn't a big deal in my system such short loss of comms so I called OB86 in my program to avoid going in to stop mode. Maybe this can help you. More about diagnostic with OB86 you can find here: https://support.industry.siemens.com/tf/WW/en/posts/rack-station-failure-and-ob86/27733?page=0&pageSize=10   My symptoms were same as yours but we never found out the reason why it went to stop..