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第1节国产PLC发展历程作为离散控制的首选产品,PLC在我国的应用已有30年的历史,PLC自20世纪70年代后期进入中国以来,应用增长十分迅速。PLC进入中国时最初是从成套设备引进应用,由于PLC价格昂贵,引进的
Section 1 The History of Domestic PLC As the first choice of discrete control, PLC has been used in our country for 30 years. Since its entry into China in the late 1970s, PLC has been growing rapidly. PLC first entered China from the introduction of complete sets of equipment applications, due to PLC expensive, the introduction of