BS EN 61158-4-17-2008 工业通讯网络.现场总线规范.数据链路层协议规范.17型元件

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【英文标准名称】:Industrialcommunicationnetworks—Fieldbusspecifications—Part4-17:Data-linklayerprotocolspecification—Type17elements
【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.17型元件
【标准号】:BSEN61158-4-17-2008
【标准状态】:现行
【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;数据服务;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-linkentitiesa)inacyclicasynchronousmanner,sequentiallytoeachofthosedata-linkentities,andb)inasynchronousmanner,eithercyclicallyoracyclically,accordingtoapre-establishedschedule.Thespecifiedprotocolalsoprovidesmeansofchangingthesetofparticipatingdata-linkentitiesandofmodifyingthesetofscheduledcommunicationsopportunities.Whenthesetofscheduledcommunicationsopportunitiesisnull,thedistributionofcommunicationopportunitiestotheparticipatingdata-linkentitiesiscompletelyasynchronous.Thusthisprotocolcanbecharacterizedasonewhichprovidesaccessasynchronouslybutwithasynchronousoverlay.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】:36P.;A4
【正文语种】:英语


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【英文标准名称】:Aerospaceseries-AluminiumalloyAL-P2618A-T6-Handanddieforgings-a150mm
【原文标准名称】:航空航天系列.铝合金AL-P2618A-T6.手锻和模锻件.a150mm
【标准号】:BSEN2085-2005
【标准状态】:现行
【国别】:英国
【发布日期】:2005-01-12
【实施或试行日期】:2005-01-12
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:尺寸;规范(验收);铝合金;自由锻造;锻件;铝;飞行器;模锻件;特性;材料;航空航天运输;化学成分
【英文主题词】:Aerospacetransport;Airtransport;Aircraft;Aluminium;Aluminiumalloys;Chemicalcomposition;Dimensions;Dropforgings;Forgings;Materials;Multilingual;Properties;Smithhammerforgings;Spacetransport;Specification(approval)
【摘要】:Thisstandardspecifiestherequirementsrelatingto:AluminiumalloyAL-P2618AT6Handanddieforgingsa≤150mmforaerospaceapplication.
【中国标准分类号】:V11
【国际标准分类号】:49_025_20
【页数】:10P;A4
【正文语种】:英语


【英文标准名称】:Smallpunchedcardsforinformationprocessing;locationanddimensionsoftheholes
【原文标准名称】:信息处理用小型穿孔卡片.第2部分:穿孔位置和尺寸
【标准号】:DIN66228-2-1978
【标准状态】:作废
【国别】:德国
【发布日期】:1978-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:信息处理;穿孔纸卡;穿孔卡片;尺寸;数据处理;孔
【英文主题词】:punchedcards;dataprocessing;informationprocessing;holes;dimensions;punchedpapercards
【摘要】:
【中国标准分类号】:L64
【国际标准分类号】:35_220_10
【页数】:2P;A4
【正文语种】:德语