PLC控制十字路口交通灯毕业论文吴国栋.doc

淄博职业学院毕业设计 摘要 PAGE 2 毕 业 设 计 题目：PLC控制十字路口交通灯 姓 名 吴 国 栋 学 号0702120122 所在系电子电气工程专业年级P07电子信息 指导教师 郝 岷 职 称 讲 师 二O一O年五月二十日 淄博职业学院毕业设计 摘要 淄博职业学院毕业设计 Ab 淄博职业学院毕业设计 摘要 PAGE I 摘 要 自从交通灯诞生以来，其内部的电路控制系统就不断的被改进。设计方法也开始多种多样，从而使交通灯显得更加智能化。 可编程控制器(PLC)以微处理器为核心，普遍采用依据继电接触器控制系统电气原理图编制的梯形图语言进行程序设计，编程容易，功能扩展方便，修改灵活,而且结构简单，抗干扰能力强。西门子可编程控制器指令丰富，可以接各种输出、输入扩充设备，有丰富的特殊扩展设备，其中的模拟输入设备和通信设备更是符合交通灯控制系统的要求与特点，能够方便地联网通信。 本文选择西门子可编程控制器S7-200为核心部件，着重进行硬件接口设计，利用梯形图和语句表进行编程，实现了十字路口交通灯控制系统的自动化。 关键词： PLC；交通控制； 淄博职业学院毕业设计 Abstract Abstract Since its birth, the lights of the internal control system is constantly circuit has been improved. Design method is varied, thereby start lights appear more intelligent. Programmable logic controller (PLC) by microprocessor as the core, generally adopted according to the relay contactor controlling system of electrical schematic diagram of the ladder diagram language program design, programming, easy extension, modification, flexible and convenient, simple in structure, strong anti-jamming capability. Siemens PLC, can meet all kinds of instruction, input output expansion equipment, has the rich special equipment, including expansion of the analog input devices and communications equipment is consistent with traffic control system of the request and the characteristic, can be easily networked communication. This article chooses Siemens S7-200 PLC for the core parts, hardware interface design, use ladder diagram and statements table programming, realized the intersection traffic control system of automation. Keywords: PLC, Traffic control, 淄博职