Detects the outputs of methods and functions that are not specified when calling the method or function.

Justification: Ignored outputs can be a notice about an unhandled error or meaningless function calls because results are not used.

Importance: Medium

FUNCTION Fun1
VAR_INPUT
	bIn : BOOL;
VAR_END
VAR_OUTPUT
 bOut : BOOL;
END_VAR

PROGRAM PLC_PRG
VAR
		bValue :BOOl;
END_VAR

Fun1(bIn : TRUE); 

 --//SA0169: The output 'bOut' is ignored when called.