题目：基于PLC交通灯控制系统设计摘要近期，高新技术得以显著发展，电子器件在现实生活中得到全面的普及，此处单片机也开始进入大众的现实生活，其在特定层面上加快了传统控制检技术的发展。目前在及时和全自动控制的的片机实用制度中，其一般被当成关键的构成方面，所以只了解单片机相关知识是无法完成研究的，有关人员也需要了解其他部分的硬件知识，加强个部分的知识学习。那如何才可以保证正常的道路秩序呢？我们需要依赖交通控制信号灯的全自动指挥系统。交通信号灯控制方式非常多。本系统展现出显著的实际功能，出行非常便利，后续维护直接便利，通过研究PLC的工作原理进行了一系列的软硬件的设计，包括红绿灯交通信号灯的运行状态，系统运行流程图以及梯形图等，并且进行实验验证，最终证明有效可行。关键词：交通灯；PLC；梯形图IIIAbstractAbstract:Recently,high-techhasgotobviousdevelopment,electronicdeviceshavebeenwidelyused,whichSCMgraduallyintothedailylifeofthepeople,promotethedevelopmentofthetraditionalcontroltechnologyingreatextent.Inreal-timedetectionandautomaticcontrolofthemicrocomputerapplicationsystem,microcontrollerisoftenusedasthemaincomponent,soonlythemastermicrocontrollerknowledgeisnotenough,wealsoneedtograspthecorrespondinghardwareknowledge,richknowledge.Crossroadstrafficfrequent,crowded,carsandpeoplewalkingtheroadintersection.Howcanwemaintainagoodroadorder?Weneedtorelyontheautomaticcommandsystemoftrafficlights.Trafficsignalcontrolmode.HereweuseMCS-52SeriesMCUAT89C52asthecenterdevicetoresearchthetrafficlightcontroller,accordingtotheactualtrafficflowthroughtheP3port8052chipdesignofredandgreenlighttime;trafficlightcycle,inthecomingtimebeforethebeginningofyellowlightwarning(trafficlightsignaloutput,displayoutputtimethetwodigitaltubethroughtheP0portthroughtheP1port).Thesystemhasobviouspracticalrole,theimplementationofmoreconvenient,simpleandconvenientmaintenance.Keywords：trafficlights;PLC;ladderdiagramII目录一、引言................................................................1二、PLC的基础知识......................................................1（一）PLC的概述........................................................1（二）PLC的工作原理....................................................1（三）PLC的结构........................................................2（四）PLC的基本性能指标................................................2三、硬件设计............................................................2（一）系统控制要求......................................................2（二）PLC电源和地址选择................................................4（三）I/O端口分配......................................................4（四）SFC流程图........................................................6（五）接线图............................................................7（六）PLC编程软件的基本思路............................................8（七）梯形图............................................................9四、系统调试...........................................................21（一）硬件调试.........................................................21（二）软件调试.........................................................21结语.................................................................22参考文献...............................................................23附录.................................................................24致谢.................................................................291一、引言本文对...
