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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > System Variable - Calling Program Number?
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  1. #1
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    Cool System Variable - Calling Program Number?

    CONTROL: FANUC Oi-F / Mill

    When working with a series of nested operations is there a way to return the o-number of the calling program at each level.

    O1111 (MAIN);
    M98 P2222;
    M30;
    %
    O2222 (NESTED1);
    #500 = ##### (??? #4000 Assigns the MAIN op number, but that doesn't work for all cases, see below);
    M98 P3333;
    M99;
    ;
    %
    O3333 (NESTED2);
    #501 = ##### (??? How can one assign 2222 to #501 here?);
    M98 P4444;
    M99;
    ;
    %
    O4444 (NESTED3);
    #502 = ##### (??? How can one assign 3333 to #502 here?);
    M98 P5555;
    M99;
    ;
    %

    And so on...

    Thank you all in advance.

  2. #2
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    Re: System Variable - Calling Program Number?

    There is also a limit to how many nesting levels that can be done
    There isn't enough information on what you really want. The M98 P xxxx will send it to the program and the m99 will return it to the line after the m98pxxxx call
    What is the use of the #500 ect. in your program. All your example does is record the program number and doesn't describe what you want to do with it

    #500 = ##### (??? #4000 Assigns the MAIN op number, but that doesn't work for all cases, see below);
    #501
    #502 ect.

    O1111 (MAIN);
    M98 P2222;(Goto n2222)
    M30;

    N2222
    M98 P3333 (goto3333
    M99 (return to the line after M98 P2222 in the calling program )

    N3333
    M98P4444(return to the line after M98 P3333
    M99

    N4444
    M98P5555(return to the line after M98 P4444
    m99
    %

  3. #3
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    Re: System Variable - Calling Program Number?

    The code shown is a simplified example. #500's are place holders.

    Is there a system variable that stores the calling programs' O-Number?

    We are needing to write 1111 too #500, 2222 too #501, and 3333 too #502

    We can view the call stack on the Screen Display how do we reference 1 level up?

    PURPOSE: A subprogram will terminate if not called by a specific parent.
    Last edited by kfleming; 10-21-2020 at 05:34 PM. Reason: Additional Information

  4. #4
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    Re: System Variable - Calling Program Number?

    this was on the forum from mike xyz on 6/28/10
    Variable #4115 is the last O number read by the control so it contains the current program number.

  5. #5
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    Re: System Variable - Calling Program Number?

    So, One could add two lines to each calling program... one to store #4115 and then one to clear the stored data.

    O1111
    (PARENT PROGRAM)
    #500 = #4115(IN LEADING SAFETY BLOCKS)
    #500 = #0 (IN TRAILING SAFETY BLOCKS)

    O7777(DEPENDENT CHILD PROGRAM)
    IF [#500 NE #1111] THAN #3000=1(*ERROR* - INVALID PARENT - SEE PRGMR)

    This won't work, if the error is raised #500 won't be cleared...

  6. #6
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    Re: System Variable - Calling Program Number?

    # 100's clears on reset #500's don't clear on reset

  7. #7
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    Re: System Variable - Calling Program Number?

    Quote Originally Posted by rcs60 View Post
    # 100's clears on reset #500's don't clear on reset
    ^^^What do you mean by reset? Power Cycle? M30? M2?
    Perhaps with unique parameter settings this is true, however on our controls,
    and all other FANUC machines I have worked on, #100's are only cleared when control is Powered Off and On.

    This is basic Macro-B knowledge. I don't need a review or an argument.

    A better question is, What System Varibles are related to the call stack?

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