控制系统PLC英文翻译

1、可编程序逻辑控制器(PLCs )一aboutprogrammablelogiccontrollers (PLCs )可编程序逻辑控制器(PLCs ) arethecontrolhubsforawidevarietyofautomatedsystemsandprocesses.theycontainmultipleinputsandoutputsthatusetransistorsandothey andrelaystocontrolequipment.theyareprogrammableviasoftwareinterfacedviastandardcomputerinterfaces可编程

2、logiccontrollersi/ochannelspecificationsincludetotalnumberofpoints、输入和输出编号， abilitytoeelity andmaximumnumberofchannels.numberofpointsisthesumoftheinputsandtheoutputs.plcsmaybespecifiedbyanypossiblecomb eunitsmaybestackedorlinkedtogethertoincreasetotalcontrolcapacity.maximumnumberofchannelsreferstoth

3、emaxer umberofinputandoutputput m.plcsystemspecificationstoconsiderincludescantime和指令数据存储器的编号， andprogrammemory.scantimeisthetimerequiredbytheplctocheckthestatesofitsinputsandoutputs.instructionsarestandardoperation hasm grammemoryisthe

4、capacityforcontrol可用可编程控制器logiccontrollersincludedc，交流，模拟，热量，RTD，速度， 脉冲和脉冲频率. outputsforplcsincludedc，交流，延迟，模拟，脉冲频率，晶体管，和触发器。programmablelogiccontrollersuseavarietyofsoftwareprogramminglanguagesforcontrol.theseincludeiec 61131-3，序列函数ch 功能块诊断程序(FBD )、梯形诊断程序(LD )和结构文本(ST )。 莱尔拉德逻辑(RLL )、流程图、c、 and bas

5、ic.theiec 61131-3程序化管理提供者支持providessupportforfivelanguagesspecifiedbytheglobalstandard 3360序列，函数雷达诊断、结构化文本、 andinstructionlist.thisallowsformulti -厂商兼容性多语言程序. sfcisagraphicallanguagetthe n of程序supportingalternativesequenceselectionsandparallelsequences.fbdusesabroadfunctionlibrarytobuildcomplexproce

6、duresinagraphicce nctionsmaybecoordinatedwithcustomizablecommunicationandinterfacefunctions.ldisagraphiclanguagefor ontrolandinterlockinglogic .控制中心thfbdfordiscretefunctioncontrol.stisatextlanguageusedforcomplexmaaax proceduresandcalculationslesswellsuitedtographicallanguaguage代码. itisusedinrelative

7、lysimplelogicinstructions.relayladderlogic (RLL )、or ladder诊断程序、 istheprimaryprogramminglanguageforprogrammablelogiccontrollers (PLCs ) . ladderlogicprogrammingisagraphicalrepresentationoftheprogramdesignedtolooklikerelaylogic.flowchartisagraphicallanguagethe ribe acontrollersequenceorapplication.it

8、isusedtobuildmodular。 reusablefunctionlibraries.cisahighlevelprogramminglanguagesuitedtohandlethemostcomplexcomputation，序列。 anddataloggingtasks.itistypicallydevelopedanddebuggedonapc.basicisahighlevellanguageusedtohandlemathematical，sequeeed程序化mmablelogiccontrollerscanalsobespecifiedwithanumberofcom

9、puterinterfaceoptions。 networkspecificationsandfeatures.plcpoweroptions，mountingoptionsandenvironmentaloperatingconditionsareallalsoimportant2 交互式教学forsimpleprogrammingtherelaymodeloftheplcissufficient.asmorecomplexfunctionsareusedthemorecomplexvonneumanmodeloftheplcmussion rocessesoneinstructionata

10、time.mostcomputersoperatethisway。 althoughtheyappeartobedoingmanythingsatonce.considerthecomputercomponentsshowninfigure 1。figure 1简单简单个人计算机体系结构inputisobtainedfromthekeyboardandmouse，输出到屏幕。 andthediskandmemoryareusedforbothinputandoutputforstorage.(note 3360 thedirectionsofthesearrowsareveryimportan

11、ttoengineerrer ) alwayspayattentiontoindicatewhereinformationisflowing.) thisfigurecanberedrawnasinfigure2toclarifytheroleofinputsandoutpurefigure2an输入-输出端口darchitectureinthisfigurethedataenterstheleftsidethroughtheinputs.(note 3360 mostengineeringdiagramshaveinputsontheleftandoutputsonthe ittrave i

12、tsbeforeitentersthecpu.thecpuoutputsdatathroughothercircuits.memoryanddisksareusedfood datathatisnotdestinedforoutput.ifwe itiscontrollingtheuserbyoutputtingstimulionthescreen，andinputtingresponsesfromthemouseandthekeyboard。aplcisalsoacomputercontrollingaprocess.whenfullyintegratedintoanapplicationtheanalogiesbecome。输入- thekeyboardisanalogoustoaproximityswitchinput-circuits -串行inputchipislikea 24 vdcinputcard计算机- 686 cpuislikeaplccpunitoutput-circuits-agraphicscardislikeatriacoutputcard输出监视器路线a灯光存储-内存inplcsissimilartomemorie