毕业设计装卸料小车多方式运行的PLC控制系统设计

西安航空职业技术学院EMBEDCorelDRAW.Graphic.9
毕业设计论文PAGE3装卸料小车多方式运行的PLC控制系统设计【摘要】早期运料小车电气控制系统多为继电器—接触器组成的复杂系统，这种系统存在设计周期长、体积大、成本高等缺陷，无数据处理和通信功能，必须有专人负责操作，将PLC应用到运料小车电气控制系统，可实现运料小车的自动化控制，降低系统的运行费用，PLC运料小车电气控制系统具有连线简单，控制速度快，可靠性和可维护性好，易于安装、维修和改造等优点。随着经济的发展，运料小车不断扩大到各个领域，从手动到自动，逐渐形成了机械化、自动化。将PLC应用到运料小车电气控制系统，可实现运料小车的自动化控制，降低系统的运行费用。通信和数据连接功能选项使得PLC在体积、通信和特殊功能模块等重要的应用方面非常完美。本课题主要包括：分析被控对象和明确系统控制要求、PLC选型、确定系统的I/O设备的数量及种类、控制流程设计、控制程序设计。PLC在运料小车控制系统中的应用，已经在国内外工程、工厂中得到实际应用，具有巨大的经济和社会价值，其智能化和自动化的思路值得以后继续深入研究和推广。关键词：PLC运料小车控制系统I/O点西安航空职业技术学院EMBEDCorelDRAW.Graphic.9
毕业设计论文PAGE3Abstract：Earlyelectriccarcontrolsystemofthetransporterovertherelay-contactorcomplexsystemcomposedofThesystemdesigncycle,thereisalong,bulky,highcost,defects,nodataprocessingandcommunicationsfunctions,mustbehandoperated,willbeappliedtotransportmaterialscarPLCelectricalcontrolsystemandcanrealizeautomaticcontroloperationofthecar,reducingtherunningcostsofthesystem,PLCcontrolsystemforelectriccartransporterwithasimpleconnectiontocontrolspeed,reliabilityandmaintainabilityisgood,easytoinstall,repairandimprovementandsoon.Witheconomicdevelopment,transportmaterialstovariousareasofgrowingcar,frommanualtoautomatic,andgraduallyformedthemechanizationandautomation.PLCappliedtotransportmaterialstocarelectricalcontrolsystemandcanrealizeautomaticcontroloperationofthecarandreducesystemoperatingcosts.CommunicationsanddataconnectivityoptionsmakePLCinvolume,communicationsandspecialfunctionmodulessuchimportantapplicationsperfectly.Thetopicsinclude:analysisofplantandaclearsystemcontrolrequirements;PLCselection;determinethesystem'sI/Odevicenumberandtype;controlprocessdesign;controlprogramming.PLCcontrolsysteminthecartransporterintheapplication,hasbeenindomesticandinternationalprojectshasbeenappliedinthefactory,withhugeeconomicandsocialvalue,theintelligenceandautomationbeyondtheideaworthyoffurtherresearchandextension.Keywords：PLCtransportercartcontrolsystemI/Opoints西安航空职业技术学院EMBEDCorelDRAW.Graphic.9
毕业设计论文PAGE3目录1控制系统介绍.......................................................................................................................................11.1控制系统在运输小车中的作用与地位.........................................11.2控制系统介绍.............................................................12运输小车系统方案的选择...................................................................................................................32.1可编程控制器PLC的优点...................................................32.2小车运输系统方案的选择...................................................43运料小车控制系统的方案论证...........................................................................................................53.1运料小车控制系统的控制内容与要求.........................................53.1.1运料小车的运动流程...........................................................................................................53.1.2设备控制要求.......................................................................................................................63.2方案论证.................................................................64硬件的选择和程序设计.......................................................................................................................74.1系统硬件设计.............................................................74.1.1PLC的选型...........................................................................................................................74.1.2S7-200CPU226简介.........................................................................................................74.2系统变量定义及分配表.....................................................74.3系统接线图设计...........................................................84.4控制系统程序设计.........................................................94.4.1系统的起停控制...................................................................................................................94.4.2系统的呼车控制.................................................................................................................104.4.3系统的呼车反转控制.........................................................................................................124.4.4系统的呼车正转控制.........................................................................................................155系统调试及结果分析.........................................................................................................................195.1系统调试及解决的问题....................................................195.2结果分析................................................................195.3小车的优缺点分析........................................................195.4设计的改进及推广........................................................20结束语....................................................................................................................................................21谢辞......................................................................................................................................................22文献............................................................................................