FUNCTION_BLOCK MembershipWithVariables

VAR_INPUT
	mid : REAL;
	high : REAL;
	low : REAL;
END_VAR

VAR_OUTPUT
    out : REAL;
END_VAR

DEFUZZIFY out
	METHOD : COG;
	DEFAULT := 4;

	TERM low := (0, 0) (low, 1) (mid, 0) ;
	TERM middle := (low, 0) (mid, 1) (high, 0);
	TERM high := (mid, 0) (high, 1) ;

END_DEFUZZIFY

END_FUNCTION_BLOCK