文档介绍：基于PLC的交通灯控制设计
摘要
可编程序控制器在工业自动化中的地位极为重要,广泛的应用于各个行业。PLC可编程序控制器是以微处理器为基础,综合了计算机技术、自动控制技术和通讯技术发展而来的一种新型工业控制装置。
解决好十字路口交通灯控制问题将是保障交通有序、安全、快捷运行的重要环节。城市交通灯控制采用的可编程制器具有可靠性高、维护方便,用法简单、通用性强等特点。本设计用三菱FX2N的可编程序控制器控制十字路口信号灯来说明可编程序控制器硬件、软件的设计,说明了一个四车道并人行道的十字路口(凯旋路与解放路交叉口)的控制情况,分析了该控制系统的工作原理,描述了系统的硬件组成,介绍了南北、东西直行车道,南北、东西左转车道,南北、东西人行车道的工作过程,对PLC的选型、I/O点的确定及交通灯的变化过程等方面进行了详细分析,利用PLC控制红黄绿灯变化来控制交通,且在各个方向安装PLC显示器。在此基础上,给出了控制系统软件设计的端子接线图、流程图、功能图、梯形图及指令表。
关键词:交通灯,可编程序控制器,软件设计,梯形图
Design of the Traffic Lights
Control Based on the PLC
ABSTRACT
Programmable Logic Controller's position in industrial automation is very important, widely used in various industries. PLC programmable logic controller based on microprocessor-based, puter technology, automatic control technology munication technology from a new type of industrial control devices.
Solve the problem of signal-controlled intersection will be the protection of traffic orderly, safe, efficient operation of the important part. Urban traffic control system using programmable devices with high reliability, easy maintenance, are easy to use, versatile and so on. Mitsubishi FX2N with the design of programmable logic controller to control the intersection signal light that programmable logic controller hardware and software design, shows a four-lane and sidewalk intersections (Kaixuan with Ponceau Road intersection) control, analyzes the working principle of the control system, describes the
system ponents, introduces the North and south, East and West straight lane, north-south east-west left turn lanes, north and south, things were working process of the carriageway on the PLC's selecvtion, I/ O points and traffic lights to determine changes in other aspects of the process of a detailed analysis, the use of PLC control changes to control red, yellow, green transportation, and installation of PLC display in all directions. On this basis, given the flow chart control system software design, functional diagram, terminal wiring dia