1、 I 摘 要 随着科学技术的日新月异，我们的生活发生了巨大的变化。一个智能化、自 动化的社会已经开始呈现于我们的眼前，这为我们提供了非常多的便利。其中自 动门就是自动化进程中的一个典型代表，此设计就是运用所学的知识，结合实际 需要而进行研究的。 为了增强自动门运行的可靠性,提出了一种以 S7-200 可编程序控制器(PLC) 为核心的自动门控制系统。 分析了该控制系统的工作原理,描述了系统的硬件组成, 介绍了人体感应探测、自动门运行位置检测、门运行障碍检测等控制电路的工作 过程,对 PLC 的选型及 I/O 点的确定进行了说明。结合 PLC 的运行特点,对控制系 统的工作流程作了合理的优化。在
2、此基础上,采用结构化的编程方法,给出了主程 序模块、开门子程序模块、关门子程序模块的程序流程图。系统已通过硬件和软 件调试,在实际中获得了应用。应用结果表明,整个系统功能完善,性能可靠。 关键词：可编程控制器； S7-200； 自动门； 控制系统 II Abstract With the rapid development of science and technology, our lives changed greatly. An intelligent and automation has began to appear in our view, this gives us great
3、convenience. In the process of automatic door is of a typical automation, this design is the use of knowledge, and combining with actual need and research. To strengthen the reliability of the operation, a S7 -200（PLC) as the core of the automatic control system. Analyzed the control system works, a
4、 description of a hardware system, introduced the body automatically detect and respond to the operation position of the inspection and operation of the inspection and control circuit to the work of the process, the plc and of course I would like to confirm the order. It was introduced how to choose
5、 a PLC type, to really settle the I/O orders. Combining the operation characteristics of programmable controller, a reasonable optimization was made for the work flow of the system. On this basis, using structured programming method, the program flow charts of main program module and opening door su
6、broutine module and closing door subroutine module were developed. The debugging of the control system was developed and the control system has been adopted. The practical application shows that the control system is good and reliable. Keywords: programmable logic controller(PLC)； S7-200； automatic door； Control system III 目 录 第 1 章 绪论. 1 1.1 选题背景 1 1.2 课题来源及意义 1 1.3 自动门的简介 2 1.4 自动门的组成及分类 3 第 2 章 PLC 的介绍和选择 5 2.1 PLC 的简介 5 2.2 PLC 的基本组成与结构 5 2.3 PLC 的工作原理 6 2.4 PLC 的主要功能及其特点 7 2.4.1 PLC 的主要功
