IEC61158-3-21Edition2.02019-04INTERNATIONALSTANDARDNORMEINTERNATIONALEIndustrialcommunicationnetworks–Fieldbusspecifications–Part3-21:Data-linklayerservicedefinition–Type21elementsRéseauxdecommunicationindustriels–Spécificationsdesbusdeterrain–Partie3-21:Définitiondesservicesdecoucheliaisondedonnées–Élémentsdetype21IEC61158-3-21:2019-04(en-fr)®THISPUBLICATIONISCOPYRIGHTPROTECTEDCopyright©2019IEC,Geneva,SwitzerlandAllrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromeitherIECorIEC'smemberNationalCommitteeinthecountryoftherequester.IfyouhaveanyquestionsaboutIECcopyrightorhaveanenquiryaboutobtainingadditionalrightstothispublication,pleasecontacttheaddressbeloworyourlocalIECmemberNationalCommitteeforfurtherinformation.Droitsdereproductionréservés.Saufindicationcontraire,aucunepartiedecettepublicationnepeutêtrereproduiteniutiliséesousquelqueformequecesoitetparaucunprocédé,électroniqueoumécanique,ycomprislaphotocopieetlesmicrofilms,sansl'accordécritdel'IECouduComiténationaldel'IECdupaysdudemandeur.Sivousavezdesquestionssurlecopyrightdel'IECousivousdésirezobtenirdesdroitssupplémentairessurcettepublication,utilisezlescoordonnéesci-aprèsoucontactezleComiténationaldel'IECdevotrepaysderésidence.IECCentralOfficeTel.:+412291902113,ruedeVarembéinfo@iec.chCH-1211Geneva20www.iec.chSwitzerlandAbouttheIECTheInternationalElectrotechnicalCommission(IEC)istheleadingglobalorganizationthatpreparesandpublishesInternationalStandardsforallelectrical,electronicandrelatedtechnologies.AboutIECpublicationsThetechnicalcontentofIECpublicationsiskeptunderconstantreviewbytheIEC.Pleasemakesurethatyouhavethelatestedition,acorrigendumoranamendmentmighthavebeenpublished.IECpublicationssearch-webstore.iec.ch/advsearchformTheadvancedsearchenablestofindIECpublicationsbyavarietyofcriteria(referencenumber,text,technicalcommittee,...
