Briefly describe the origin of PLC?

November 20, 2019 6:18 am

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In 1969, the United States’ Digital Equipment Corporation (DEC) developed the first programmable controller. In 1971, Japan, Germany, the United Kingdom, and France successively developed programmable controllers adapted to the country. In 1974, China began.Develop and produce programmable controllers.In the late 1970s, programmable logic controllers evolved from switching control to computer digital control, with more computer functions.