Network interface unit (NIU) is an interface device between the control computer and the communication network.
网络接口单元（NIU）是控制计算机与通信网络进行交互的一种接口设备。
Fault recovery method, communication network, network unit and communication interface module.
故障恢复方法，通信网络，网络单元，及通信接口模块。
The master communicates with the relay unit by serial communication interface and the relay unit communicates with module unit by wireless communication network.
上位机和中继单元之间采用串行口通信，中继单元和模块单元之间采用无线网路进行通信。
The data communicating between the data sampling unit and the computer adopts RS485 fieldbus. At the same time, the communication protocols and RS485 communication interface are designed.
前端数据采集装置和后台上位机之间数据通信采用RS485总线，设计了RS485通信接口电路和通信协议。
The data communicating between the data sampling unit and the computer adopts RS485 fieldbus. At the same time, the communication protocols and RS485 communication interface are designed.
前端数据采集装置和后台上位机之间数据通信采用RS485总线，设计了RS485通信接口电路和通信协议。
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