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给出RS-485,RS-422从站主动呼叫所产生总线竟争问题的解决方案.该方案特点是可实现各站间互为主动方的通信,通信信号线少,结构简单,特别适合远距离的分布集散控制系统.
This paper presents a solution to the problem of bus contention caused by active calls from RS-485 and RS-422 slaves.This scheme features that each station can communicate with each other, with less communication signal lines and simple structure, especially suitable for far The distribution of distance control system.