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BOOL_TO_SAFEBOOL

ssoverinissoverini
edited December 2019 in PLCnext Engineer

Hi community,

I'm working with RFC 4072s and I need to convert in the Safety-related POU with PlcNext Engineer a BOOL variable into a SAFEBOOL one.

I think to have imported correctly all libraries but I cannot find the function (BOOL_TO_SAFEBOOL) even if I can find the description on the PlcNext Engineer help.

Can anyone help me?

Thanks

Simone

Comments

  • StefanStefan

    Hi Simone!

    I think the function EN_OUT will solve your problem or if you are using ladder you can "and" the non safe with a safebool to set a safebool value.   

    |------------|bool|----------|safebool|-------------------(safebool)-|

    Br Stefan

     

  • Oliver PLCnext TeamOliver PLCnext Team

    Hello ,

    It isn´t possible to convert non-safe types to safe types.

    That is not allowed.
    You can use from the libraray safety IEC 61131-3 => bitwise boolean => FC EN_OUT.
    Please note the function block help and the warning instruction if you use this function.


    Description EN_OUT:
    Sets a safety-related output signal based on a standard and a safety-related input signal using AND logic.
    This function can be used to implement the enable principle.

  • ssoverinissoverini

    Ok,

    thank you very much!

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