可编程序控制器(PROGRAMMABLE CONTROLLER),简称PC机,是本世纪六十年代后期由美国通用汽车公司提出的。一九七七年以微型计算机为基础的PC机问世,从这时起PC机与以前提出的有了本质的区别。我国从八十年代初开始引入,在工业自动控制系统中应用趋势是逐年上升,已成为工业设备和生产过程自动化方面的有力工具。据介 Programmable controller (PROGRAMMABLE CONTROLLER), referred to as PC machine, is the late 1960s by the United States General Motors proposed. The PC-based PC, introduced in 1977, came into existence. From then on, the PC made a fundamental difference from the previous one. Since the beginning of the eighties of our country was introduced, the application trend in industrial automatic control system has been increasing year by year, which has become a powerful tool in the automation of industrial equipment and production processes. According to referral