(This article briefly describes the history and progress of the modification and development of the computer monitoring and control system of domestic hydropower plants, and comments on the structural development direction of the local control unit of the computer monitoring and control system. The key commented on the structure and characteristics of the LCU that began to use PLC to directly access the Internet in recent years, and first commented on the method, speed, reliability, programming complexity, and the number of connected devices in this way. Characteristics.)
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