IECTR6113182003可编程的控制器第8部分程序设计语言的执行和应用指南

TECHNICALREPORTIECTR61131-8Secondedition2003-09Programmablecontrollers–Part8:GuidelinesfortheapplicationandimplementationofprogramminglanguagesAutomatesprogrammables–Partie8:Lignesdirectricespourl'applicationetlamiseenoeuvredeslangagesdeprogrammationReferencenumberIEC/TR61131-8:2003(E)(seebelow)inadditiontoneweditions,amendmentsandcorrigenda.Informationonthesubjectsunderconsiderationandworkinprogressundertakenbythetechnicalcommitteewhichhaspreparedthispublication,aswellasthelistofpublicationsissued,isalsoavailablefromthefollowing:•IECWebSite()•CatalogueofIECpublicationsTheon-linecatalogueontheIECwebsite()enablesyoutosearchbyavarietyofcriteriaincludingtextsearches,technicalcommitteesanddateofpublication.On-lineinformationisalsoavailableonrecentlyissuedpublications,withdrawnandreplacedpublications,aswellascorrigenda.•IECJustPublishedThissummaryofrecentlyissuedpublications()isalsoavailablebyemail.PleasecontacttheCustomerServiceCentre(seebelow)forfurtherinformation.•CustomerServiceCentreIfyouhaveanyquestionsregardingthispublicationorneedfurtherassistance,pleasecontacttheCustomerServiceCentre:Email:[e-mail]:[phone]Fax:[phone]–Part8:GuidelinesfortheapplicationandimplementationofprogramminglanguagesAutomatesprogrammables–Partie8:Lignesdirectricespourl'applicationetlamiseenoeuvredeslangagesdeprogrammationPRICECODEIEC2003Copyright-allrightsreservedNopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromthepublisher.InternationalElectrotechnicalCommission,3,ruedeVarembé,POBox131,CH-1211Geneva20,SwitzerlandTelephone:[phone]Telefax:[phone]E-mail:[e-mail]:МеждународнаяЭлектротехническаяКомиссия–2–TR61131-8IEC:2003(E)CONTENTSFOREWORD..........................................................................................................................6INTRODUCTION....................................................................................................................81General............................................................................................................................91.1Scope.....................................................................................................................91.2Normativereferences..............................................................................................91.3Abbreviatedterms...................................................................................................91.4Overview...............................................................................................................102IntroductiontoIEC61131-3.............................................................................................102.1Generalconsiderations..........................................................................................102.2Overcominghistoricallimitations............................................................................122.3BasicfeaturesinIEC61131-3................................................................................132.4NewfeaturesinthesecondeditionofIEC61131-3.................................................142.5Softwareengineeringconsiderations......................................................................142.5.1Applicationofsoftwareengineeringprinciples.............................................142.5.2Portability...................................................................................................173Applicationguidelines.....................................................................................................183.1Useofdatatypes...................................................................................................183.1.1Typeversusvariableinitialization...............................................................183.1.2Useofenumeratedandsubrangetypes......................................................183.1.3UseofBCDdata.............................................................................