知识竞赛抢答器控制程序设计摘要.doc

毕业设计（论文）报告 题 目：知识竞赛抢答器控制程序设计 系 别 专 业 班 级 姓 名 学 号 指导教师 201X年 X月 摘 要 可编程序控制器（Programmable Logic Controller）是以微处理器为核心的工业自动控制通用装置，它简称PLC，它的应用面广，使用方便，已经成为当代工业自动化的主要支柱之一。 随着PLC 技术的发展，编程语言，通信能力和其他很多性能都进一步提高。现在的PLC 提供了更快的扫描时间，更高效的利用内存空间，高密度的I/O系统和非传统设备直接连接到PLC的特殊接口。它们不但可以和其他控制系统进行通信，还具有执行报告功能，诊断自身、机器或过程的故障。 PLC在我国已经应用二十几年的历史，随着目前生产自动化水平的提高，以及各种监控系统的需要，PLC以其外部电路简单、模块化结构、可靠性高，尤其可以通过方便的编制和修改软件来实现顺序控制的功能等特点，在各类竞赛中，都离不开抢答器，用PLC设计竞赛抢答器，其控制方便、灵活，只要改变输入PLC的程序，便可改变其控制方案 关键词：可编程序控制器Abstrac PLC (Programmable Logic Controller) in the microprocessor industry as the core of the Universal Automatic Control devices, it referred PLC, a wide range of its application, easy to use, industrial automation has become a contemporary one of the main pillars. As PLC technology has advanced ,so have programming languages and communications ca-pabilities ,along with many other important features .Today’s PLCs offer faster scan times ,space efficient high-density input/output systems and special interfaces to allow non-tradit-ional divices to be attached directly to the PLC .Not only can they communicate with other control system ,they can also perform reporting function and diagnose their own failures,as well as the failure of a machine or process . PLC has been applied 20 years in our history, with raising the current level of production automation, and various surveillance systems require, PLC with its external circuit is simple, modular structure, high reliability, in particular through the establishment of convenience and modify the software to achieve sequence control function, etc., in all competitions, are inseparable from the Responder, Responder with PLC design competition, its easy to control, and flexible, as long as the procedure to change the PLC input can change the control program Keyword: Programmable Logic Controller， Responder Knowledge Contest，S7-200 目 录 前言 3