英汉翻译文献新.docVIP

2011届毕业设计（论文） 外文翻译 系 、 部： 电气与信息工程系 学生姓名： 吴龙军 指导教师： 罗雪莲 职 称： 教授 专 业： 自动化 班 级： 自本0703班 学 号： 410070331 2011 年6月 PLC control technology Programmable logic controller (PLC) is in the program controller and microcomputer controller is developed on the basis of microcomputer technology and relay conventional control the combination of the concept. With the development of science and technology, the application of PLC in industrial control more and more widely. PLC produced so far only 30 years since the history, but have developed rapidly and the widespread application, become the contemporary industrial automation, one of the main pillars of industrial production in future, PLC technology and robots and CAD/CAM technology will become production of industrial automation tied, since the three pillars of the new industrial control device of PLC in industrial application in importance and universality, in order to adapt to the needs of the development of the industrial production automation, namely to PLC automatic control system design and reliability is of great significance to the discussion. 1 The development and application of PLC PLC is in the program controller and microcomputer controller developed on the basis of microcomputer technology and relay conventional control the combination of the concept. Broadly speaking, PLC is a computer system, computer has stronger than average of industrial process connected with the input/output interface, and has become the basic device automation control system. PLC has been used widely in machinery, metallurgy, chemical industry, automobile, light industries, has basic replaced traditional relays and contactor logic control. Use PLC to control the system reliability of the equipment, its than mere relays and contactor controlling is greatly increased. In computer technology as the core of PLC general industrial aut