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IEC_61850
INTERNATIONALSTANDARDIEC61850-9-1First edition2003-05Communication networks andsystems in substations Part 9-1:Specific Communication ServiceMapping(SCSM)Sampled values over serial unidirectionalmultidrop point to point linkReference numberIEC 61850-9-1:2003(E)Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(http:/www.iec.ch/searchpub/cur_fut.htm)enables you to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just Published This summary of recently issued publications(http:/www.iec.ch/online_news/justpub/jp_entry.htm)is also available by email.Please contact the CustomerService Centre(see below)for further information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-INTERNATIONALSTANDARDIEC61850-9-1First edition2003-05Communication networks andsystems in substations Part 9-1:Specific Communication ServiceMapping(SCSM)Sampled values over serial unidirectionalmultidrop point to point link IEC 2003 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chUFor price,see current cataloguePRICE CODECommission Electrotechnique InternationaleInternational Electrotechnical Commission Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-2 61850-9-1 IEC:2003(E)CONTENTSFOREWORD.4INTRODUCTION.61Scope.72Normative references.83Terms and definitions.84Abbreviations.85Principle of mapping to the serial unidirectional multidrop point to point link.95.1Communication stack.95.1.1Physical layer.105.1.2Link layer.115.1.3Network layer.125.1.4Transport layer.125.1.5Session layer.125.1.6Presentation layer.125.1.7Application layer.125.2Restrictions.126Mapping of common types.126.1Object name.126.2Object reference.127Mapping of the model for transmission of sampled values using multicast.137.1Mapping of the multicast sampled values services.137.2Mapping of the update of the sampled value buffer.147.3Additional definitions for the transmission of sampled analogue values.147.3.1Application layer functionality.147.3.2Presentation layer functionality.157.3.3Transport layer functionality.158Mapping of the common data classes.168.1Overview.168.2Additional definitions for the mapping of the common data classes.16Annex A(normative)Definition of data set instances and related multicast sampledvalue control instances.19Annex B(informative)Calculation of required bandwidth.22Annex C(informative)Definitions of logical node instance names and data namesrelated to the data sets.24Annex D(informative)Electronic transformers block diagram and configuration example.28Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-61850-9-1 IEC:2003(E)3 Figure 1 Example for the use of the serial unidirectional multidrop point to point link.7Figure 2 Communication stac

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