The elevator has a limit switch on each floor. When touching a floor of the elevator travel switch, it indicates that the elevator has reached that floor.
When the call button is pressed, the corresponding call indicator lights up and remains unchanged until the elevator responds to the call. When the elevator stops on a certain floor, when the door-opening button is pressed inside the elevator, the door of the elevator is opened, and the door-opening button is pressed inside the elevator, and the door of the elevator is closed. However, in the process of elevator driving, the elevator door can not be opened. When the elevator runs to a certain floor, the response floor indicator lights up, until the elevator runs to the front floor, the floor indicator lights change.