VAR_IN_OUT , VAR [...] VAR_IN_OUT | VAR

, output and VAR_IN_OUT [...] only input, output and VAR_IN_OUT [...] , output and VAR_IN_OUT

or VAR_IN_OUT . Call :

_MyB VAR_INPUT iInB : [...] 'hide'} xInvisibleIn [...] _OUTPUT iOutB : INT; END

_BLOCK POU VAR_IN_OUT

_INPUT VAR_INST VAR_IN_OUT [...] _INST VAR_IN_OUT VAR [...] variable *) END_VAR VAR_IN_OUT

_OUTPUT , and VAR_INOUT

: the input variable xLocIn and the output variable xLocOut [...] _BLOCK locio VAR xLocIn

the local variable xInvisibleIn [...] _BLOCK FB_MyA VAR_INPUT iIn [...] 'hide'} xInvisibleIn

72 . Example fun(iIn1 := 1, iIn2 := 2, iOut [...] Example VAR_OUPUT iOut