Variable: VAR_INPUT

Input variables are used at the inputs of function blocks. You declare VAR_INPUT variables between the VAR_INPUT and END_VAR keywords in the declaration part of POUs. When called, only the value is passed (pass-by-value).

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

Example 81. Example

VAR_INPUT
        iIn1 : INT; (* 1st input variable *)
END_VAR