The reasons for the failure are as follows: First, check whether the controller has set advanced functions such as anti-stealth, interlock, emergency closing, etc., please cancel the Settings, and then make a judgment: ① The operator has set the access guard on holidays (all cards can not open the door during holidays); ② The operator initializes the access control device or the controller executes the initialization command for other reasons; ③ The time of the controller is wrong, resulting in all the cards expired.