It discussed theoretically about the token ring, Ethernet and FDDI, which is normally used in DCS communication network, and analyzed its merit and defects in regard of industrial control requirement.
主要针对在DCS通讯网络中常见的令牌网、以太网和FDDI网从理论上进行了一些讨论，并结合工业控制的要求分析了各自的优缺点。
It discussed theoretically about the token ring, Ethernet and FDDI, which is normally used in DCS communication network, and analyzed its merit and defects in regard of industrial control requirement.
主要针对在DCS通讯网络中常见的令牌网、以太网和FDDI网从理论上进行了一些讨论，并结合工业控制的要求分析了各自的优缺点。
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