纯净水灌装机PLC系统控制设计.docVIP

毕业设计（论文）报告 题 目 纯净水灌装机PLC控制系统 的设计 院 系 中德机电学院 专 业 电气自动化 班 级 0902 学生姓名 曹蓓 学 号 100091611 指导教师 龚运新 2012年 4 月 纯净水灌装机PLC系统控制的设计 摘要：近年来，社会的发展和进步对各行各业提出了越来越高的要求。机械化加工企业为了提高生产效率和市场竞争力，采用了机械化流水线作业的生产方式，对不同的产品分别组成了自动流水线。产品不断地更新换代，也同时要求相应的控制系统随之改，提高产品生产的效率。在这种情况下，硬连接方式的继电接触式控制系统就不能满足经常更新的要求了。这是因为，一是成本高，二是周期长。在早期还出现过矩阵式顺序控制器和晶体管逻辑控制系统，由于这些装置体积大，功能少，本身存在很多不足，虽然在能够提高控制系统的通用性和灵活性，但均未得到广泛应该。 PLC可编程序控制器具有结构简单、编程方便、可靠性高等优点，已广泛用于工业过程和位置的自动控制中。据统计，可编程控制器是工业自动化装置中应用最多的一种设备。专家认为，可编程控制器将成为今后工业控制的主要手段和重要的基础设备之一。由于PLC具有对使用环境适应性强的特性，同时其内部定时器资源十分丰富，The design of pure water filling machine PLC control system Abstract：In recent years, the development of social development and progress of all walks of life put forward more and more high demand. Mechanization processing enterprise in order to increase the production efficiency and competitiveness, the mechanization line operation mode of production, to a different products separately formed to be automatic assembly line. Product constantly updating and upgrading, and also requires the appropriate control system then change, improve product production efficiency. In this case, hard links of the way the relay contact control system can not meet the requirement of often update. Because, the first is a high cost, and the second is cycle is long. In the early days also appeared matrix sequence controller and the transistor logic control system, because the device is big, the function is less, there are so many shortcomings, although in can increase control system of general and flexibility, but were not widely should. PLC programmable controller is simple in structure, convenient programming and high reliability etc, are widely used in industrial process and the location of the automatic control. According to the statistics, the programmable controller is used in the industrial automation devices a kind of most equipment. Experts think, programmable controller will be the majo