【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


【英文标准名称】:Technicalproductdocumentation.OrganizationandnamingoflayersforCAD.Overviewandprinciples
【原文标准名称】:技术产品文件.计算机辅助设计(CAD)用层的编排和命名.总则和原理
【标准号】:BSENISO13567-1-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-04-03
【实施或试行日期】:2002-04-03
【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】:基础;计算机辅助设计(CAD);计算机辅助设计;计算机应用;数据处理;定义;文档;层;概述;电刨;产品文件;表示法;结构;调查;技术文献;技术制图;术语;组织;传输
【英文主题词】:Basis;CAD;Computeraideddesign;Computerapplications;Dataprocessing;Definitions;Files;Layers;Overviews;Planes;Productsdocumentation;Representations;Structure;Survey;Technicaldocuments;Technicaldrawing;Terms;Texture;Transmission
【摘要】:ThispartofIS013567establishesthegeneralprinciplesoflayerstructuringwithinCADfiles.LayersareusedtocontrolvisibilityandtomanageandcommunicateCADfiledata.Layernamesareusedtorepresentthisstructure.Theprinciplesareapplicabletoallpartiesinvolvedinpreparingandusingtechnicaldocumentationoncomputersystems.Althoughtheseprinciplesareprimarilyforusers,CADsystemdevelopersareexpectedtoprovidesoftwaretoolscapableofimplementingandsupportingthispartofIS013567.Animportantuseisalsotostructuredataincomponentlibrariesproducedbythirdparties.
【中国标准分类号】:L70
【国际标准分类号】:01_110;35_240_10
【页数】:12P.;A4
【正文语种】:英语