Field-bus is a kind of serial link for data communication, or a kind of communication network for connecting intelligent field-bus equipments with automatic system.
现场总线是一种串行数据通信链路，是连接智能现场设备和自动化系统的一种通信网络。
The structure of physical layer, link layer and application layer was applied in field-bus of network control, data was gained through cyclic query of principal and subordinate PC in link layer.
控制网络现场总线采用物理层、链路层和应用层结构。链路层以主从循环查询获取数据。
The structure of physical layer, link layer and application layer was applied in field-bus of network control, data was gained through cyclic query of principal and subordinate PC in link layer.
控制网络现场总线采用物理层、链路层和应用层结构。链路层以主从循环查询获取数据。
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