基于CAN总线的牵引变电所综自通讯规约的设计

Communication Protocol Design of Traction Substation Automation System Based on CAN Bus

介绍了一种基于CAN总线的牵引变电站自动化系统的通讯规约的设计方法。CAN通讯规约所有帧采用标准帧,报文采用两种形式处理,对于要求及时通知调度的报文如SOE报文采用产生单元主动向通讯管理单元发送,录波报文虽然优先级低,但通讯管理单元无法知道其他单元何时产生录波报文,所以也采用主动发送的方式。其他报文由通讯管理单元发送查询报文,其他单元收到查询报文后发回应报文。

This paper narrates a kind of communication protocol design method to the traction substation automation system based on CAN bus,all CAN communication protocol frames adopt the standard frame, leaves two kinds of forms on literary grace to deal with,notify to offer gentle if SOE transmit the data literary grace with produce unit manage to communication entrance sends voluntarily dispatcher in time demanding, though record wave data transmission form has low communication, unable to know other units when it produces to be it to adopt the way to send voluntarily even to record wave to manage unit. Others are managed by communication unit, the data transmission form is responded and offered gently.