摘要
介绍了CAN控制芯片单、双验收滤波器的工作原理,分析了变电站自动化系统的通信形式。第一种区分上下行报文通信模式与第二种区分相关报文的通信模式相比,前者CPU的工作效率低于后者。第二种通信模式的扩展帧报文的标识符为29位,多于第一种的11位标识符,利用这些多余的标识符表示报文帧的其他重要信息,从而提高报文信息的传递效率。同时第二种通信模式在错误处理能力和接收缓冲区容量方面明显优于第一种。
The working principles of single and double acceptance filters of CAN chip are introduced,and then the communication modes in substation automation system are analyzed.Compared with the first communication mode,which identifies up and down messages,the CPU's working efficiency of the second communication mode,which identifies correlative messages,is higher.The extension frame identification code of the second mode is29bits,while that of the first mode is11bits,it can carry more information,and therefore the message efficiency is improved.At the same time ,the error correcting capability and the receiver buffer of the second mode are better than these of the first mode.
出处
《电力自动化设备》
EI
CSCD
北大核心
2002年第11期53-55,共3页
Electric Power Automation Equipment
