initialize variables

Runtime
2019-01-16
2019-01-17
  • Thomassmets

    Thomassmets - 2019-01-16

    Dear all,
    I have tried to initialize my variables ( init: BOOL := 1; ).
    This works the first time I run the program.
    If I stop the program and run it again (or if I build again, login and start the program) its not initialized again.
    How can I fix this ?
    I would like to initialize my variable everytime I start the program.

     
  • JAPIB

    JAPIB - 2019-01-16

    Hello
    Only a hot Reset or a cold Reset intialize variables.
    When you build your program, login and start it, it's like a Reset.

    I think you have to write a small program to initialize your variables each time you simply run the program.

    For exemple :

    (GVL declaration)
    VAR
    xInitialisation_OK :BOOL; (This variable is FALSE each time your PLC start)
    END_VAR


    (Begin of your program)
    IF NOT xInitialisation_OK then (IF xInitialisation_OK is FALSE, it's the first cycle of scrutation)
    xvariable1:= ... ; (write the initial value you want )
    xvariable2:=... ;
    ..........
    xInitialisation_OK :=TRUE; (Initialization is finish)
    END_IF


    You can also write this program in a "StartDone" System Event.

    BR

     
  • Thomassmets

    Thomassmets - 2019-01-17

    Thank you !

    I have fixed it with the StartDone Event.

    Thanks for the reply..

    Grz
    Thomas

     

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