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BS EN 61158-4-18-2008 工业通讯网络.现场总线规范.数据链路层协议规范.18型元件

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【英文标准名称】:Industrialcommunicationnetworks.Fieldbusspecifications.Data-linklayerprotocolspecification.Type18elements
【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.18型元件
【标准号】:BSEN61158-4-18-2008
【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】:Automaticcontrolsystems;Busnetworks;Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Communicationnetworks;Communicationprocedures;Computernetworks;Controlequipment;Controlsystems;Controltechnology;Datacommunication;Datalinklayer(OSI);Datalinklayers;Datalinksystem;Dataprocessing;Dataservices;Datatransfer;Datatransmission;Definitions;Digital;Digitaldata;Digitalengineering;Digitalsignals;EDP;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)inasynchronously-startingcyclicmanner,accordingtoapre-establishedschedule,andb)inacyclicoracyclicasynchronousmanner,asrequestedeachcyclebyeachofthosedata-linkentities.Thusthisprotocolcanbecharacterizedasonewhichprovidescyclicandacyclicaccessasynchronouslybutwithasynchronousrestartofeachcycle.1.2SpecificationsThispartofIEC61158specifiesa)proceduresforthetimelytransferofdataandcontrolinformationfromonedata-linkuserentitytoapeeruserentity,andamongthedata-linkentitiesformingthedistributeddatalinkserviceprovider;b)proceduresforgivingcommunicationsopportunitiestoallparticipatingDL-entities,sequentiallyandinacyclicmannerfordeterministicandsynchronizedtransferatcyclicintervalsuptoonemillisecond;c)proceduresforgivingcommunicationopportunitiesavailablefortime-criticaldatatransmissiontogetherwithnon-time-criticaldatatransmissionwithoutprejudicetothetime-criticaldatatransmission;d)proceduresforgivingcyclicandacycliccommunicationopportunitiesfortime-criticaldatatransmissionwithprioritizedaccess;e)proceduresforgivingcommunicationopportunitiesbasedonstandardISO/IEC8802-3mediumaccesscontrol,withprovisionsfornodestobeaddedorremovedduringnormaloperation;f)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.1.5ConformanceThispartofIEC61158doesnotspecifyindividualimplementationsorproducts,nordotheyconstraintheimplementationsofdata-linkentitieswithinindustrialautomationsystems.Thereisnoconformanceofequipmenttothisdata-linklayerservicedefinitionstandard.Instead,conformanceisachievedthroughimplementationofthecorrespondingdata-linkprotocolthatfulfillstheType18data-linklayerservicesdefinedinthisstandard.
【中国标准分类号】:N17
【国际标准分类号】:25_040_40;35_100_20;35_160;35_240_50
【页数】:40P.;A4
【正文语种】:英语


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基本信息
标准名称:硅酸钙绝热制品
中标分类: 建材 >> 建材产品 >> 绝热、吸声、轻质与防火材料
替代情况:被GB/T 10699-1998代替
发布日期:
实施日期:1989-12-01
首发日期:
作废日期:
出版日期:
页数:15页
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所属分类: 建材 建材产品 绝热 吸声 轻质与防火材料
【英文标准名称】:StandardGuideforDescribingShorelineResponseTechniques
【原文标准名称】:滨线响应技术描述用标准指南
【标准号】:ASTMF2204-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:F20.17
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:Oilspillcontrolsystems--ecologicalconsiderations;Remedialactionprocess/sites;Shorelinecleaning(ofmarineenvironments);Strandedoil
【摘要】:Oncetheextentandtypeofshorelineoilinghasbeendefinedanddocumentedusingproperprocedures(seeGuidesF1686andF1687),decisionsaremadeontheappropriatecourseofactionforcleaningandrestoration.Insomecases,naturalrecoverymaybethepreferredapproachwhereasinothercases,activeinterventionmaybeappropriate.Thisguidesummarizestheprincipalresponsetechniquesavailable.Thisguideisintendedtominimizepossibleaddedimpacttotheenvironmentthatcouldresultfromoverly-aggressivecleanup.Insomecases,localprioritiesmaydictatethatintensiveclean-upmethodsmaybewarranted.Inallcases,concurrencetousesuchtechniquesshouldbeobtainedfromallthemajorstakeholdersandmustcomplywithapplicableregulations.1.1Thisguidedescribesmethodsofcleaningandremediatingshorelinescontainingstrandedoil.Theprimarygoalofanyshorelinecountermeasureistoaidrecoverywhileminimizingadditionalimpact.1.2Thisguidedescribes22differenttacticsthatareavailableforconsideration.Theseoptionsrangefromnaturalrecoverytoactiveintervention.1.3Thetacticslistedmaynotbeappropriateunderallpossiblecircumstances,andmultiplecountermeasuresmaybeappropriateonthesameshoreline.1.4Thisguidedescribestechnicalconsiderationsforselectingonetechniqueoranother,orboth.1.5Selectionofspecificcountermeasuresforuseduringaspillresponseareguidedbythepropertiesofthestrandedoil,thedegreeofoiling,shorelineaccessibility,shorelinegeomorphology,mobilityofavailableequipment,oceanographicandmeteorologicalconditions,andthepresenceofsensitivenaturalandarcheologicalresources.Itisadvisabletoconsultwiththeappropriateregulatoryauthoritiesascertainresponseoptionsmayrequiregovernmentauthorizationandapproval.1.6Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E90
【国际标准分类号】:75_180_01
【页数】:9P.;A4
【正文语种】:英语