The use of Controller Area Network serial communication protocol to transmit data between elevator controller, car operating panel, hall stations, and peripheral devices.
Full Definition
CAN bus (Controller Area Network) is a robust serial communication standard originally developed for automotive applications that has been widely adopted in elevator control systems. It allows the main controller to exchange data with car operating panels, hall call stations, position encoders, door controllers, and monitoring devices over a simple two-wire bus, replacing large multi-core cable looms. CAN bus supports real-time data exchange, error detection, and prioritised messaging, making it reliable for safety-critical elevator communication. Many modern systems combine CAN bus with CANopen or proprietary application-layer protocols.
