FUNCTION_BLOCK junit1

VAR_INPUT
	temp : REAL;
END_VAR

VAR_OUTPUT
	valve : REAL;
END_VAR

FUZZIFY temp
	TERM cold := (0, 1) (30, 0);
	TERM hot := (0, 0) (30, 1);
END_FUZZIFY

DEFUZZIFY valve
	TERM closed := 0;
	TERM inlet := 1; 
END_DEFUZZIFY

RULEBLOCK No1
	AND : MIN;
	ACCU : MAX;
	RULE 1 : IF temp IS cold THEN valve IS closed;
	RULE 2 : IF temp IS hot THEN valve IS inlet;
END_RULEBLOCK

END_FUNCTION_BLOCK