This paper introduces the application of PLC in reconstructing the relay control system and gives I/O distribution diagram and some of programs.
介绍了PLC在继电器控制系统改造中的应用，给出了I/O分配图及部分程序。
This paper introduces the application of PLC in reconstructing the relay control system and gives I/O distribution diagram and some of programs.
介绍了PLC在继电器控制系统改造中的应用，给出了I/O分配图及部分程序。
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