The structures of two widely used fieldbus, i. e. , PROFIBUS-DP and MODBUS are analyzed, as well as the data transmission methods and the feasibility to design the protocol conversion gateway.
分析了工控领域广泛应用的现场总线PROFIBUS-DP与MODBUS的协议结构与数据传输方法、设计协议转换网关的可行性以及网关的电路设计与工作流程。
A gateway is utilized to realize the protocol conversion at application level.
网关的作用就是在应用层实现协议之间的相互转换。
When video stream transmitted between different networks, Media Gateway must implement video stream format conversion, protocol process, and resource control.
在异构网络间进行视频通信时，需要通过媒体网关对视频流进行格式转换、协议处理、资源控制。
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