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【英文标准名称】:Digitaldatacommunicationsformeasurementandcontrol-Fieldbusforuseinindustrialcontrolsystems-Datalinkservicedefinition
【原文标准名称】:测量和控制用数字数据通信.工业控制系统用现场总线.数据链路服务定义
【标准号】:BSEN61158-3-2004
【标准状态】:作废
【国别】:英国
【发布日期】:2004-08-26
【实施或试行日期】:2004-08-26
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电气工程;规范(验收);现场总线;数字的;传播学;电子系统;总线;信号;过程控制工程;数字工程;工业设施;控制系统;控制工艺学;过程控制系统;定义;过程控制;数据传送;数据处理;信息技术;数字数据;工业的;规范;物理层;电子仪器;信息交换;链路层;电路网络;总线系统;数据连接系统;电子数据处理;制导系统;传输媒质;数据通信;开放系统互连;信息处理;接口(数据处理);数据链层;数据服务;控制设备
【英文主题词】:Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Controlequipment;Controlsystems;Controltechnology;Datacommunication;Datalinklayers;Datalinksystem;Dataprocessing;Dataservices;Datatransfer;Definition;Definitions;Digital;Digitaldata;Digitalengineering;EDP;Electricalengineering;Electronicinstruments;Electronicsystems;Fieldbus;Guidancesystems;Industrial;Industrialfacilities;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces(dataprocessing);Linklayers;Opensystemsinterconnection;OSI;Physicallayers;Processcontrol;Processcontrolengineering;Processcontrolsystems;Signals;Specification;Specification(approval);Transmissionmedia
【摘要】:1OverviewThispartofIEC61158providesbasictime-criticalmessagingcommunicationsbetweendevicesinanautomationenvironment.Theterm"time-critical"isusedtorepresentthepresenceofatime-window,withinwhichoneormorespecifiedactionsarerequiredtobecompletedwithsomedefinedlevelofcertainty.Failuretocompletespecifiedactionswithinthetimewindowrisksfailureoftheapplicationsrequestingtheactions,withattendantrisktoequipment,plantandpossiblyhumanlife.ThispartofIEC61158definesinanabstractwaytheexternallyvisibleserviceprovidedbytheFieldbusDataLinkLayerintermsofa)theprimitiveactionsandeventsoftheservice;b)theparametersassociatedwitheachprimitiveactionandevent,andtheformwhichtheytake;andc)theinterrelationshipbetweentheseactionsandevents,andtheirvalidsequences.ThepurposeofthispartofIEC61158istodefinetheservicesprovidedto1)thevarioustypesofFieldbusApplicationLayerattheboundarybetweentheApplicationandDataLinkLayersoftheFieldbusReferenceModel,and2)SystemsManagementattheboundarybetweentheDataLinkLayerandSystemsManagementoftheFieldbusReferenceModel.SevendistincttypesofservicesaredefinedinthispartofIEC61158;eachhasacorrespond-ingprotocolinIEC61158-4.ThesevendistincttypesofDL-serviceare:Type1—ADL-servicewhichprovidesasupersetofthoseservicesexpectedofOSIDataLinkProtocolsasspecifiedinISO/IEC8886.Type2—ADL-servicewhichprovidesbothaconnectedandaconnectionlesssubsetofthoseservicesspecifiedinISO/IEC8886.Type3—ADL-servicewhichprovidesaconnectionlesssubsetofthoseservicesspecifiedinISO/IEC8886.Type4—ADL-servicewhichprovidesaconnectionlesssubsetofthoseservicesspecifiedinISO/IEC8886.NOTE1ThispartofIEC61158doesnotdefineaType5DataLinkservice.OtherpartsofIEC61158defineaType5ApplicationLayerserviceandprotocol.ThedesignationType5isreservedinthispartofIEC61158tomaintainnumberingconsistencywiththeotherpartsofIEC61158.Type6—ADL-servicewhichprovidesbothaconnectedandaconnectionlesssubsetofthoseservicesprovidedbyOSIDataLinkProtocolsasspecifiedinISO/IEC8886.Type7—ADL-servicewhichprovidesbothaconnectedandaconnectionlesssubsetofthoseservicesprovidedbyOSIDataLinkProtocolsasspecifiedinISO/IEC8886.Type8—ADL-servicewhichprovidesaconnection-orientedsubsetofthoseservicesspecifiedinISO/IEC8886.NOTE2ManyoftheseTypesofservicearesuitableforusewithmultiplehigher-layerprotocols.InadditiontothepotentialabilityofthesetypesofDataLinkservicetosupportunrelatedTypesofFieldbusApplicationLayerprotocol,someoftheseTypesofDataLinkservicealsomaybeabletosupport:a)theOSINetworkLayerattheboundarybetweentheNetworkandDataLinkLayersoftheOSIBasicReferenceModelb)theIETF(IP)NetworkLayerc)theSmartTransducerInterfaceforSensorsandActuatorsasdefinedinIEEE1451.2.Wherethescopeofaddressingisadequate,someoftheseTypesofDataLinkservicealsomaybeabletosupportd)anOSITransportLayerProtocol.NOTE3Useofsomeoftheseprotocoltypesisrestrictedbytheircopyrightholders.InallcasesaparticularDataLinkprotocolTypecanbeusedwithoutrestrictionwhencoupledwiththesameTypePhysicalLayerandApplicationLayerprotocols,orwithothercombinationsasspecifiedinIEC61784.UseofthevariousprotocolTypesinothercombinationsmayrequirepermissionoftheirrespectivecopyrightholders.2SpecificationsTheprincipalobjectiveofthispartofIEC61158istospecifythecharacteristicsofconceptualDataLinkServicessuitablefortime-criticalcommunications,andthussupplementtheOSIBasicReferenceModelinguidingthedevelopm
【中国标准分类号】:N17
【国际标准分类号】:35_100_20;35_160;35_240_50
【页数】:318P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticesforMountingTestSpecimensforSoundTransmissionLossTestingofNavalandMarineShipBulkheadTreatmentMaterials
【原文标准名称】:海军和航海船舶舱壁处理材料的声传输损失试验用试样的安装
【标准号】:ASTME1123-1986(2003)
【标准状态】:现行
【国别】:
【发布日期】:1986
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E33.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:锁定试验;试样;传输损耗;声传输;材料;声学;建筑;造船;声学测量;建筑声学
【英文主题词】:bulkhead;marineacousticalapplications;soundtransmissionloss
【摘要】:Thesoundtransmissionlossprovidedbyamaterialthatcoversaflatsurfacedependsnotonlyonthephysicalpropertiesofthematerialbutalsoonthetypeofstructuretowhichitismountedandthemountingmethodused.Navalandmarinearchitectsanddesignengineersrequirespecifictransmissionlosscharacteristicsofacousticaltreatmentmaterialsastheywouldexhibitinstalledonaship’structure.Themountingstructureandproceduresspecifiedinthesepracticesareintendedtosimulatesuchashipboardenvironment.TestreportsmayrefertothismountingbyPracticesE1123insteadofprovidingadetaileddescriptionofthemountingused.1.1ThesepracticesdescribetestspecimenmountingstobeusedfornavalandmarineshipapplicationsduringsoundtransmissionlosstestsperformedinaccordancewithTestMethodE90.1.2Thestructurespecifiedinthesepracticesisintendedformountingofsingle-layertreatmentsorcompositetreatmentsconsistingofvariousmaterialsandconfigurations.Acousticaltreatmentmaterialsmaybecombinationsofacousticalabsorbentmaterials,limpmassseptums,andinsulationmaterials.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:U05
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】: