CAN总线上的智能节点是网络上报文的接收和发送站，一般由单片机和可编程的CAN通信控制器组成。
The smart node on CAN field-bus is the transmit or receive station of messages. It is mainly combined with micro-controller and programmable CAN controller.
分析了B码的对时机理，指出变电站的智能设备采用B码对时，就不再需要现场总线的通信报文对时，也不再需要GPS输出大量脉冲接点信号。
The synchronization principle of IRIG-B code is analyzed. When applying IRIG-B code in substation IED, neither communication messages of fieldbus nor multiple pulse signals of GPS are needed.
分析了B码的对时机理，指出变电站的智能设备采用B码对时，就不再需要现场总线的通信报文对时，也不再需要GPS输出大量脉冲接点信号。
The synchronization principle of IRIG-B code is analyzed. When applying IRIG-B code in substation IED, neither communication messages of fieldbus nor multiple pulse signals of GPS are needed.
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