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1、外文资料翻译PLCApplicationandTheUseofBriefAttentionProblemsOvertheyears,theprogrammablecontroller(hereinafterreferredtoasPLC)fromitscreationtonow,toachieveaconnectiontothestoragelogicalleapinlogic;itsfunctionfromweaktostrong,toachievealogiccontroltodigitalcontroloftheprogress;itsapplicationsfromsm
2、alltolarge,toachieveasinglesimplecontroldevicetothequalifiedmotioncontrol,processcontrolanddistributioncontroloveravarietyoftasks.PLCindealingwithtoday'sanaloganddigitalcomputing,human-computerinterfaces,andnetworkshavebeenasubstantialincreaseinthecapacitytobecomethemainstreamofthefieldofcon
3、trolofindustrialcontrolequipment,inallwalksoflifeplayinganincreasinglyimportantrole.Second,PLCapplicationareasCurrently,PLChasbeenwidelyusedindomesticironandsteel,petroleum,chemical,electricpower,buildingmaterials,machinerymanufacturing,automobile,textile,transportation,environmentalprotecti
4、onandculturalentertainmentandotherindustries,theuseismainlydividedintothefollowingcategories:1.LogiccontrolswitchReplacetraditionalrelaycircuit,logiccontrol,sequentialcontrol,bothforthecontrolofasinglepieceofequipmentcanalsobeusedformulti-groupcontrolandautomationlines.Suchasinjectionmolding
5、machines,printingpresses,staplesmachinery,machinetool,grinding,packaginglines,platinglinesandsoon.2.IndustrialProcessControlIntheindustrialproductionprocess,therearesome,suchastemperature,pressure,flow,levelandspeedoftheamountofcontinuouschange(ie,analog),PLCusingtheappropriateA/DandD/Aconve
6、rtermodule,andavarietyofcontrolalgorithmtohandleanalog,completeclosed-loopcontrol.PIDclosedloopcontrolsystemadjustmentisusedgenerallyhavemoreofaconditioningmethod.Processcontrolinmetallurgy,chemicalindustry,heattreatment,boilercontrolandsoonhaveaverywiderangeofapplications.3.MotionControlPLC
7、canbeusedinacircularmotionorlinearmotioncontrol.Generallyuseadedicatedmotioncontrolmodule,forexampleasteppermotororservomotordrivensingle-axisormulti-axispositioncontrolmodule,iswidelyusedinavarietyofmachinery,machinetools,robots,elevatorsandothero
