FUNCTION_BLOCK junit3

VAR_INPUT
	temp : REAL;
	pressure : REAL;
END_VAR

VAR_OUTPUT
	valve : REAL;
END_VAR

FUZZIFY temp
	TERM cold := (3, 1) (27, 0) ;
	TERM hot := (3, 0) (27, 1);
END_FUZZIFY

FUZZIFY pressure
	TERM low := (55, 1) (95, 0);
	TERM high:= (55, 0) (95, 1);
END_FUZZIFY

DEFUZZIFY valve
	TERM drainage := -100;
	TERM closed := 0;
	TERM inlet := 100;
	METHOD : COGS;
	DEFAULT := 0;
END_DEFUZZIFY

RULEBLOCK No1
	AND : MIN;
	ACCU : MAX;
	RULE 1 : IF temp IS cold AND pressure IS low THEN valve IS inlet;
	RULE 2 : IF temp IS cold AND pressure IS high THEN valve IS closed WITH 0.8;
	RULE 3 : IF temp IS hot AND pressure IS low THEN valve IS closed;
	RULE 4 : IF temp IS hot AND pressure IS high THEN valve IS drainage;
	RULE 5 : IF (temp IS hot AND pressure IS high) OR pressure IS low THEN valve IS drainage, valve IS closed WITH 0.8;
END_RULEBLOCK

END_FUNCTION_BLOCK