A problem occurred when the control rules were applied to the FCV valve

[Zcy1187949797]

Hello, I found a conundrum when I was taking control statements on the FCV valve. The details are as follows： My expectation is that when the tank level behind the valve is higher than 1.2 meters, the FCV set the flow rate from 4 to 5, and the valve is closed. But after the actual simulation, only changed the valve set value, and did not close the valve. The control statements are as follows: RULE 1 IF TANK 9 LEVEL ABOVE 1.2 THEN VALVE 9 SETTING IS 5 AND VALVE 9 STATUS IS CLOSED Sincere request to solve, thank you very much

[LRossman]

Your rule contains two conflicting actions to apply to Valve 9 - set its flow rate to 5 and close it (which essentially sets the flow rate to 0). An action clause for a link will replace an earlier appearing action for the link only if it belongs to a rule with a higher priority. In this case the STATUS CLOSED action is ignored since it has the same priority as SETTING IS 5 action which is the one that winds up being applied.

A more logically consistent rule statement would change the last clause to:

ELSE VALVE 9 STATUS IS CLOSED