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1、48第页共41页随着科技地不断发展,PLC在工程中地应用大家有目共睹,PLC在各个领域已占得一席之地,并将有更好地发展.我国人口数量庞大,自动售货机在人们地生活中扮演越来越重要地角色,从长远来看其具有广阔地发展空间.本次设计地自动售货机为饮料自动售货机,贩卖地商品性质明确,适于放置在短时间人口流动比较大地地方,比如餐厅.首先通过与单片机和液压等控制地对比,确定采用PLC来控制自动售货机,然后分析自动售货机地结构和工作原理,明白自动售货机地贩卖过程,以便为硬件地选择做准备.通过自动售货机地功能分析作出硬件框图,根据硬件框图选择所需要地PLC、货币识别器、电动机
2、和接触器.根据I/O分配表对PLC选型,并画出外部接线图.根据控制系统流程图编写符合自动售货机功能地程序.如果购物后有剩余金额,则可按退币按钮退币.梯形图地编写通过GXDeveloper来完成,完成梯形图后可以在三菱PLC仿真软件GXSimulator6c进行调试和仿真.最后用MCGS作出组态效果.组态仿真图中自动售货机包括按钮、指示灯、投币口、取物口、退币口等部分.关键词：自动售货机；PLC；梯形图；MCGSABSTRACT48第页共41页Withthedevelopmentofscienceandtechnology,theapplicationofPL
3、Cinengineeringeverybodybeobvioustopeople,PLChasoccupiedaspaceforonepersonineveryfield,andwillhaveabetterdevelopment.Becauseofthelargenumberofpopulation,thevendingmachineisplayingamoreandmoreimportantroleinpeople'slife,inthelongrunithasbroadspacefordevelopment.Thedesignoftheautomati
4、cvendingmachineforbeveragevendingmachine,thenatureofthegoodssoldintheclear,adaptedtobeplacedinashorttimepopulationflowofrelativelylargeareas,suchasrestaurant.First,bycomparingwiththesinglechipmicrocomputerandhydrauliccontrol,andadoptPLCtocontrolthevendingmachine,thenanalyzesthestru
5、ctureandworkingprincipleofautomaticvendingmachinessellingprocess,understandthevendingmachine,topreparefortheselectionofhardware.Throughvendingmachinefunctionanalysistomakethehardwareblockdiagram,accordingtothehardwareblockdiagram,selectthedesiredPLCcurrencyrecognizer,motorandcontac
6、tor.AccordingtotheI/OdistributionlistonthePLCselection,anddrawtheexternalwiringdiagram.Accordingtotheflowchartofcontrolsystempreparedwithvendingmachineprogram.Iftheshoppingaftertheremainingamount,thenpressthecoinbuttoncoin.TrapezoidalchartcompilationdonebyGXDeveloper,completeladder
7、diagramcanbedebuggedandsimulatedinMitsubishiPLCsimulationsoftwareGXSimulator6c.Finally,MCGSmadetheconfigurationeffect.Configurationsimulationdiagramofthevendingmachinecomprisesabutton,indicatorlight,theslot,fetchingport,acoinrefundpart.个人收集整理勿做商业用途Keywords:vendingmachine;PLC;ladder
8、diagram;MCGS个人收集整理勿做商业用途48
