Variable: VAR

Output variables are used at the outputs of function blocks. You declare ‎VAR_OUTPUT‎ variables between the ‎VAR_OUTPUT‎ and ‎END_VAR‎ keywords in the declaration part of POUs. The values of this variable are returned to the calling POU. There you can retrieve the values and continue using them.

The variable can be specified with an attribute keyword (‎CONSTANT‎, ‎RETAIN‎ or ‎PERSISTENT‎) to be expanded.

Example

VAR_OUPUT
        iOut1 : INT; (*1st output variable *)
END_VAR

Output variables in functions and methods