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【英文标准名称】:Gasmeters-Conversiondevices-Part1:Volumeconversion(includesAmendmentA1:2006);EnglishversionofDINEN12405-1:2007-08
【原文标准名称】:煤气表.换算装置.第1部分:体积换算
【标准号】:EN12405-1-2006
【标准状态】:现行
【国别】:
【发布日期】:2007-08
【实施或试行日期】:2007-08-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:合格;合格测试;定义;设计;电气工程;电子仪器;电子测量装置;煤气表;燃气技术;供气表;仪表用变压器;作标记;测量范围;压力;压力传送器;生产;定量测量;数量转换器;实际油气比;安全;规范(验收);温度;测试;转换器;发射机;体积
【英文主题词】:Conformity;Conformitytesting;Definition;Definitions;Design;Electricalengineering;Electronicinstruments;Electronicmeasuringdevices;Gasmeters;Gastechnology;Gas-supplymeters;Instrumenttransformers;Marking;Measuringranges;Pressure;Pressuretransmitter;Production;Quantitativemeasurement;Quantitytranslators;Realgasfactors;Safety;Specification(approval);Temperature;Testing;Translators;Transmitters;Volume
【摘要】:
【中国标准分类号】:Q82
【国际标准分类号】:91_140_40
【页数】:111P.;A4
【正文语种】:英语


【英文标准名称】:Industrialcommunicationnetworks-Fieldbusspecifications-Data-linklayerprotocolspecification-Type2elements
【原文标准名称】:工业通讯网络.现场总线规范.数据链路层协议规范.2型元件
【标准号】:BSEN61158-4-2-2008
【标准状态】:作废
【国别】:英国
【发布日期】:2008-05-30
【实施或试行日期】:2008-05-30
【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】:总线系统;总线;电路网络;通信;控制设备;控制系统;控制工艺学;数据通信;数据链路层;数据连接系统;数据处理;数据设备;数据传送;数字的;数字数据;数字工程;数字信号;电子数据处理;电气工程;电子仪器;电子系统;现场总线;制导系统;工业的;工业设施;信息交换;信息处理;信息技术;接口(数据处理);链路层;开放系统互连;物理层;过程控制;过程控制工程;过程控制系统;协议规范;协议;信号;规范;规范(验收);传输媒质;传输协议
【英文主题词】:Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Controlequipment;Controlsystems;Controltechnology;Datacommunication;Datalinklayers;Datalinksystem;Dataprocessing;Dataservices;Datatransfer;Definition;Definitions;Digital;Digitaldata;Digitalengineering;Digitalsignals;EDP;Electricalengineering;Electronicinstruments;Electronicsystems;Englishlanguage;Fieldbus;Guidancesystems;Industrial;Industrialfacilities;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces;Interfaces(dataprocessing);Linklayers;Opensystemsinterconnection;OSI;Processcontrol;Processcontrolengineering;Processcontrolsystems;Protocolspecification;Protocols;Signals;Specification;Specification(approval);Transmissionmedia;Transmissionprotocol
【摘要】:1.1GeneralThedata-linklayerprovidesbasictime-criticalmessagingcommunicationsbetweendevicesinanautomationenvironment.Thisprotocolprovidescommunicationopportunitiestoallparticipatingdata-linkentities,sequentiallyandinacyclicsynchronousmanner.Foregroundscheduledaccessisavailablefortime-criticalactivitiestogetherwithbackgroundunscheduledaccessforlesscriticalactivities.Deterministicandsynchronizedtransferscanbeprovidedatcyclicintervalsupto1msanddeviceseparationsof25km.Thisperformanceisadjustabledynamicallyandon-linebyreconfiguringtheparametersofthelocallinkwhilstnormaloperationcontinues.Bysimilarmeans,DLconnectionsandnewdevicesmaybeaddedorremovedduringnormaloperation.Thisprotocolprovidesmeanstomaintainclocksynchronizationacrossanextendedlinkwithaprecisionbetterthan10μs.ThisprotocoloptimizeseachaccessopportunitybyconcatenatingmultipleDLSDUsandassociatedDLPCIintoasingleDLPDU,therebyimprovingdatatransferefficiencyfordatalinkentitiesthatactivelysourcemultiplestreamsofdata.Themaximumsystemsizeisanunlimitednumberoflinksof99nodes,eachwith255DLSAPaddresses.Eachlinkhasamaximumof224relatedpeerandpublisherDLCEPs.1.2SpecificationsThisstandardspecifiesa)proceduresforthetimelytransferofdataandcontrolinformationfromonedata-linkuserentitytoapeeruserentity,andamongthedata-linkentitiesformingthedistributeddatalinkserviceprovider;b)thestructureofthefieldbusDLPDUsusedforthetransferofdataandcontrolinformationbytheprotocolofthisstandard,andtheirrepresentationasphysicalinterfacedataunits.1.3ProceduresTheproceduresaredefinedintermsofa)theinteractionsbetweenpeerDL-entities(DLEs)throughtheexchangeoffieldbusDLPDUs;b)theinteractionsbetweenaDL-service(DLS)providerandaDLS-userinthesamesystemthroughtheexchangeofDLSprimitives;c)theinteractionsbetweenaDLS-providerandaPh-serviceproviderinthesamesystemthroughtheexchangeofPh-serviceprimitives.1.4ApplicabilityTheseproceduresareapplicabletoinstancesofcommunicationbetweensystemswhichsupporttime-criticalcommunicationsserviceswithinthedata-linklayeroftheOSIorfieldbusreferencemodels,andwhichrequiretheabilitytointerconnectinanopensystemsinterconnectionenvironment.Profilesprovideasimplemulti-attributemeansofsummarizinganimplementation’scapabilities,andthusitsapplicabilitytovarioustime-criticalcommunicationsneeds.1.5ConformanceThisstandardalsospecifiesconformancerequirementsforsystemsimplementingtheseprocedures.Thisstandarddoesnotcontainteststodemonstratecompliancewithsuchrequirements.
【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】:224P.;A4
【正文语种】:英语