基于PLC八路抢答器的毕业设计.doc

摘 要 近年来随着科技的飞速发展，PLC的应用正在不断地走向深入，同时带动传统控制检测日新月益更新。它具有结构简单、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，PLC、机器人、CAD/CAM将成为工业生产的三大支柱。PLC型抢答器是将PLC用于对抢答器的控制，主要是考虑其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，可对目前使用的抢答器进行精确控制，特别是对多人抢答的控制可方便的实现。 关键词：PLC 定时器 Abstract In recent years along with the rapid development of science and technology, the application of PLC are constantly deepening, led the traditional control test at the same time ever updated. It has the advantages of simple structure, easy programming, high reliability, has been widely used in industrial processes and automatic control of the location. According to statistics, the programmable controller is the most widely used industrial automation equipment in an equipment. The expert thinks, the programmable controller will become the future of industrial control main measure and important basic equipment, PLC, CAD / CAM, the robot will become the industrial production of the three big pillar. Type PLC responder is PLC for Responder control, mainly on account of its having the use of environmental adaptability features, while its internal timer resources are very rich, can be used for the present responder for precise control, especially for people answer in the control can be conveniently realized. Through the design of a responder, enable us to master the principle of programmable logic controller, function, application, programming method and programming skills, is our master some basic models, master PLC control technology and application of the basic principles, and learning the PLC programming diversity, flexibility, is our master PLC in practical application control action, action sequence and the principle of automatic control in the field, for future work to lay a solid foundation. At the same time, during the design process, but also cultivate our independent working ability and creativity, comprehensive use of professional knowledge and ability, ability to s