摘要： 研究了RS232C接口电气特性和DCS系统网络的工作特性,分析了并发帧碰撞发生机理及其导致的帧错误类型,定义了多主通信的帧格式和纠错方法,完成了并发帧碰撞侦听和纠错机制设计,实现了DCS系统中的即插拔和多主通信。
关键词:
RS232C,
多主呼叫,
即插即拔,
帧碰撞
Abstract: The circuit and topology of RS232C interface are investigated to reveal the mechanism of multiple callings from terminals,and the errors from a collision are studied.The calling strategy and frame formats for data communication,registering and quitting are designed to listen and identify a collision out of two or more calling occurred simultaneously.It shows that the communication strategy of Multiple Callings from terminals to central computer with RS232C protocol is feasible and reliable.
中图分类号:
王博;潘泉;. 基于RS232C的即插拔多主通信协议[J]. , 2005, 31(23): 210-212.
WANG Bo1,PAN Quan2. RS232C-based Plug & Play Multiple Master Serial Communication[J]. , 2005, 31(23): 210-212.