CAN总线,即controller area network,被称为控制器局域网现场总线,它是现场总线技术的一种,是一种架构开放、广播式的新一代网络通信技术。CAN总线系统采用直接连接的方式,不仅提供了设备级故障诊断方法,而且提高了通信效率和设备的互换性。它是一种有效支持分布式控制或实时控制的串 CAN bus, that is, controller area network, is called Controller Area Network Fieldbus. It is a type of fieldbus technology and is a new generation network communication technology with open structure and broadcast type. CAN bus system using direct connection, not only provides a device-level fault diagnosis method, but also improve the communication efficiency and equipment interchangeability. It is a string that effectively supports distributed control or real-time control