A kind of simple save main circuit for regulating voltage;
一种简单节省的调压主电路
By some PLC application examples,this paper presents several kinds of design methods for saving the PLC input and output points.
输入输出(即I/O)点数是PLC的重要技术指标和资源,I/O点数的节省是提高PLC控制系统经济性能的重要手段。
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