IEC 61158-3-1-2007 工业通讯网络.数据总线规范.第3-1部分:数据联络层设备定义.1型元件

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【英文标准名称】:Industrialcommunicationnetworks-Fieldbusspecifications-Part3-1:Data-linklayerservicedefinition-Type1elements
【原文标准名称】:工业通讯网络.数据总线规范.第3-1部分:数据联络层设备定义.1型元件
【标准号】:IEC61158-3-1-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-12
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC65C
【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;数据链层;数据连接系统;数据处理;数据设备;数据传送;定义;数字的;数字数据;数字工程;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;OSI;过程控制;过程控制工程;过程控制系统;信号;规范;规范(验收);传输媒质
【英文主题词】:Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Controlequipment;Controlsystems;Controltechnology;Datacommunication;Datalinklayers;Datalinksystem;Dataprocessing;Dataservices;Datatransfer;Definitions;Digital;Digitaldata;Digitalengineering;EDP;Electronicinstruments;Electronicsystems;Englishlanguage;Fieldbus;Guidancesystems;Industrial;Industrialfacilities;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces(dataprocessing);Linklayers;Opensystemsinterconnection;OSI;Processcontrol;Processcontrolengineering;Processcontrolsystems;Signals;Specification;Specification(approval);Transmissionmedia
【摘要】:1.1OverviewThispartofIEC61158providescommonelementsforbasictime-criticalmessagingcommunicationsbetweendevicesinanautomationenvironment.Theterm“time-critical”isusedtorepresentthepresenceofatime-window,withinwhichoneormorespecifiedactionsarerequiredtobecompletedwithsomedefinedlevelofcertainty.Failuretocompletespecifiedactionswithinthetimewindowrisksfailureoftheapplicationsrequestingtheactions,withattendantrisktoequipment,plantandpossiblyhumanlife.ThisstandarddefinesinanabstractwaytheexternallyvisibleserviceprovidedbytheType1fieldbusdata-linklayerintermsofa)theprimitiveactionsandeventsoftheservice;b)theparametersassociatedwitheachprimitiveactionandevent,andtheformwhichtheytake;andc)theinterrelationshipbetweentheseactionsandevents,andtheirvalidsequences.Thepurposeofthisstandardistodefinetheservicesprovidedto?theType1fieldbusapplicationlayerattheboundarybetweentheapplicationanddata-linklayersofthefieldbusreferencemodel;?systemsmanagementattheboundarybetweenthedata-linklayerandsystemsmanagementofthefieldbusreferencemodel.1.2SpecificationsTheprincipalobjectiveofthisstandardistospecifythecharacteristicsofconceptualdata-linklayerservicessuitablefortime-criticalcommunications,andthussupplementtheOSIBasicReferenceModelinguidingthedevelopmentofdata-linkprotocolsfortime-criticalcommunications.Asecondaryobjectiveistoprovidemigrationpathsfrompreviouslyexistingindustrialcommunicationsprotocols.ThisspecificationmaybeusedasthebasisforformalDL-Programming-Interfaces.Nevertheless,itisnotaformalprogramminginterface,andanysuchinterfacewillneedtoaddressimplementationissuesnotcoveredbythisspecification,includinga)thesizesandoctetorderingofvariousmulti-octetserviceparameters;b)thecorrelationofpairedrequestandconfirm,orindicationandresponse,primitives.1.3ConformanceThisstandarddoesnotspecifyindividualimplementationsorproducts,nordoesitconstraintheimplementationsofdata-linkentitieswithinindustrialautomationsystems.Thereisnoconformanceofequipmenttothisdata-linklayerservicedefinitionstandard.Instead,conformanceisachievedthroughimplementationofthecorrespondingdata-linkprotocolthatfulfillstheType7data-linklayerservicesdefinedinthisstandard.
【中国标准分类号】:N18;P76
【国际标准分类号】:25_040_40;35_100_20;35_160
【页数】:128P;A4
【正文语种】:英语


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【英文标准名称】:IEC60601-2-54,Ed.1:Medicalelectricalequipment-Part2-54:ParticularrequirementsforthebasicsafetyandessentialperformanceofX-rayequipmentforradiographyandradioscopy
【原文标准名称】:IEC60601-2-54,第1版:医用电子设备.第2-54部分:放射线照相术和放射线透视用X射线设备基本安全性和主要性能的特殊要求
【标准号】:IEC60601-2-54-2009
【标准状态】:现行
【国别】:国际
【发布日期】:2009-06
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC62B
【标准类型】:()
【标准水平】:()
【中文主题词】:事故预防;防护等级;定义;设计;接地;电气器具;电接触保护;电气外壳;电气工程;医用电气设备;电气保护设备;电气安全;电驱动装置;电磁兼容性;电医学;静电学;电磁兼容性EMC;设备安全;图形符号;检验;使用说明;绝缘外壳;绝缘;文字书写;处理;测量;测量技术;机械安全;医疗设备;医学放射学;医学科学;医疗技术学;职业安全;操作说明书;防电击;合格试验;辐射防护;辐射摄影术;辐射学;射线检查;安全;安全装置;安全要求;规范(验收);试验设备;测试;试验条件;变压器;X射线仪
【英文主题词】:Accidentprevention;Classesofprotection;Definitions;Design;Earthing;Electricappliances;Electriccontactprotection;Electricenclosures;Electricalengineering;Electricalmedicalequipment;Electricalprotectionequipment;Electricalsafety;Electrically-operateddevices;Electromagneticcompatibility;Electromedicine;Electrostatics;EMC;Equipmentsafety;Graphicsymbols;Inspection;Instructionsforuse;Insulatingenclosures;Insulations;Letterings;Marking;Measurement;Measuringtechniques;Mechanicalsafety;Medicaldevices;Medicalequipment;Medicalradiology;Medicalsciences;Medicaltechnology;Occupationalsafety;Operationalinstructions;Protectionagainstelectricshocks;Qualificationtests;Radiationprotection;Radiography;Radiology;Radioscopy;Safety;Safetydevices;Safetyrequirements;Specification(approval);Testequipment;Testing;Testingconditions;Transformers;X-rayapparatus
【摘要】:
【中国标准分类号】:C43
【国际标准分类号】:11_040_50
【页数】:146P;A4
【正文语种】:英语


MIL-PRF-131J, PERFORMANCE SPECIFICATION: BARRIER MATERIALS, WATER VAPOR-PROOF, GREASE-PROOF, FLEXIBLE, HEAT-SEALABLE (26 AUG 1998)SUPERSEDING MIL-B-131H]., This specification covers the requirements for heat-sealable, greaseproof, flexible barrier materials having low water vapor transmission characteristics for use in military packaging.