Car command and floor call control
Car inside the control box corresponding to each floor set a button with a light,
The elevator control system is also called the command button. After the passenger enters the car and presses the destination station button to go, the button light is on, that is, the instruction is registered in the car, and after the operation to the destination station, the instruction is canceled and the button light is extinguished. Elevator station call signal is through the floor of the door next to the button to achieve. Signal control or set election control of the elevator, in addition to the top floor only under the call button, the bottom only the call button, the rest of each layer have up and down call button.