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为应对工业无线测控需要而提出的单跳令牌环网受无线模块通信距离限制,无法满足实际工业应用需求。为了延长通信距离,扩大令牌环网应用范围,提出一种在基于原令牌环协议的基础上挂接主从的两层无线监控网络WICN-TL(Wireless Indus-trial Control Network-Two Layers),介绍了其协议模型的拓扑结构及通信流程,将该协议在基于IEEE802.15.4a的硬件平台NanoNET上加以实现,并接入PROFIBUS-DP现场总线系统,在某污水处理厂进行了实地测试。测试结果表明,该协议具有良好的通信能力和较大的覆盖范围,能够适应工业环境的应用需要。
In order to meet the needs of industrial wireless measurement and control, the single-hop token ring network is limited by the communication distance of wireless modules and can not meet the requirements of actual industrial applications. In order to extend the communication distance and expand the scope of application of Token Ring, this paper proposes a WLCN-TL (Wireless Indus-trial Control Network-Two Layers) based on the original Token Ring protocol, , Introduced the topology and communication flow of its protocol model, realized the protocol on NanoNET which is based on IEEE802.15.4a hardware platform, and connected to PROFIBUS-DP fieldbus system and conducted field test in a sewage treatment plant. The test results show that the protocol has good communication capabilities and large coverage and can adapt to the application needs of industrial environments.