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现地控制单元(LCU)是水电站监控系统的数据采集和控制执行的中心。在LCU中配置通信管理装置不仅能减少PLC的中央处理器(CPU)负荷率,同时扩大了数据的采集和控制范围。首先介绍了LCU与外部智能设备的3种通信方式;进而阐述了通信管理装置在LCU中的应用;归纳了一个稳定可靠的通信管理装置需要具备的特点。
The local control unit (LCU) is the center of the data acquisition and control execution of the hydropower station monitoring system. Configuring communication management devices in the LCU not only reduces PLC CPU load rates, but also expands the scope of data acquisition and control. Firstly, three kinds of communication methods of LCU and external intelligent devices are introduced. Then the application of communication management device in LCU is described. The necessary characteristics of a stable and reliable communication management device are summarized.