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Resetting Applications dl-permalink__symbolPermalink

Resetting the application stops the program and resets the variables to their initialization values. Depending on the type of reset, retain variables and persistent variables are also reset.

  • Reset Warm: All variables are reset, except ‎RETAIN‎ and ‎PERSISTENT‎ variables.

  • Reset Cold: All variables are reset, except ‎PERSISTENT‎ variables.

  • Reset Origin: All variables are reset.

  • Reset Origin Device: All variables are reset and all applications are deleted.

The following sample program and statements clarify the functionality of the various resets.

Sample program

Declaration 

VAR
        iVar: INT := 0;
END_VAR
VAR RETAIN
        iVarRetain: INT :=0;
END_VAR
VAR PERSISTENT
        iVarPersistent : INT:= 0;
END_VAR

Implementation 

iVar := 100;
iVarRetain := 200;
iVarPersistent :=300;

  1. Insert the “Persistent Variables” object below the application and open it in the editor.

  2. Execute the “Build  Build” command.

  3. Execute the “Declare  Add All Instance Paths” command.

    The instance path of the persistent variables is inserted.

  4. Download the application to the controller.

  • Executing a Reset Warm, Reset Cold, and Reset Origin