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BS EN 61158-3-2004 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

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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


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【英文标准名称】:Aluminiumoxideprimarilyusedfortheproductionofaluminium-Determinationofcalciumcontent
【原文标准名称】:主要用于铝生产的氧化铝钙含量的测定
【标准号】:ISO2070-1997
【标准状态】:现行
【国别】:国际
【发布日期】:1997-03
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC47
【标准类型】:()
【标准水平】:()
【中文主题词】:铝;含量测定;冶金;钙含量;氧化铝;化学分析和试验
【英文主题词】:Aluminium;Aluminiumoxide;Calciumcontent;Chemicalanalysisandtesting;Determinationofcontent;Metallurgy
【摘要】:ThisInternationalStandarddescribesaflameatomicabsorptionmethodforthedeterminationofthecalciumcontentofaluminiumoxideprimarilyusedfortheproductionofaluminium.Themethodisapplicabletoproductshavingacalciumcontent,expressedasCaO,ofnotlessthan0,002%(m/m).
【中国标准分类号】:G10
【国际标准分类号】:71_100_10
【页数】:4P;A4
【正文语种】:英语


【英文标准名称】:Materialstestingmachines;hardnesstestingmachineswithanopticalindentation-measuringdevice;testforcesfrom49,03to29420N
【原文标准名称】:材料试验机.带光学压痕测量装置的硬度检验仪.测力范围:49.03-29420N
【标准号】:DIN51225T.1-1985
【标准状态】:作废
【国别】:
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【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
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