1、BRITISH STANDARD BS EN 61334-4-1:1997 IEC 61334-4-1: 1996 Distribution automation using distribution line carrier system Part 4: Data communication protocols Section 1: Reference model of the communication system The European Standard EN 61334-4-1:1996 has the status of a British Standard. ICS 33.04
2、0.40BSEN61334-4-1:1997 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes into effect on 15October1997 BSI 03-2000 ISBN 0 580 28597 9 National foreword This British Standard is the Eng
3、lish language version of EN 61334-4-1:1996. It is identical with IEC 61334-4-1:1996. The UK participation in its preparation was entrusted to Technical Committee PEL/57, Power system control and associated communications, which has the responsibility to: aid enquirers to understand the text; present
4、 to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UKinterests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be ob
5、tained on request to its secretary. From 1 January 1997, all IEC publications have the number60000added to the old number. For instance, IEC27-1has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers
6、 from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding or European publications. The British Standards which implement these international or
7、European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a con
8、tract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 1
9、2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN61334-4-1:1997 BSI 03-2000 i
10、Contents Page National foreword Inside front cover Foreword 2 Text of EN 61334-4-1 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61334-4-1 December 1996 ICS 33.020; 33.040.40 Descriptors: Electric power, distribution automation, line carrier communication systems, data communication
11、protocol, reference model Englishversion Distribution automation using distribution line carrier systems Part 4: Data communication protocols Section 1: Reference model of the communication system (IEC 1334-4-1:1996) Automatisation de la distribution laide de systmes de communication courants porteu
12、rs Partie 4: Protocoles de communication de donnes Section 1: Modle de rfrence du systme de communication (CEI 1334-4-1:1996) Verteilungsautomatisierung mit Hilfe von Trgersystemen auf Verteilungsleitungen Teil 4: Datenkommunikationsprotokolle Hauptabschnitt 1: Referenzmodell fr das Kommunikationsys
13、tem (IEC 1334-4-1:1996) This European Standard was approved by CENELEC on 1996-10-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date li
14、sts and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the
15、responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembo
16、urg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels
17、 1996 Copyright reserved to CENELEC members Ref. No. EN 61334-4-1:1996 EEN61334-4-1:1996 BSI 03-2000 2 Foreword The text of document 57/260/FDIS, future edition1of IEC 1334-4-1, prepared by IEC TC 57, Power system control and associated communications, was submitted to the IEC-CENELEC parallel vote
18、and was approved by CENELEC as EN 61334-4-1 on 1996-10-01. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, Annex ZA is normative and Annex A is informative. Annex Z
19、A has been added by CENELEC. Endorsement notice The text of the International Standard IEC1334-4-1:1996was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Description of the reference model 3 3.1 Introd
20、uction 3 3.2 Basic principles of the OSI model 4 3.2.1 Layered architecture 4 3.2.2 Services and protocols 4 3.3 Reference model 5 3.3.1 Minimal three-layer architecture 5 3.3.2 Basic transmission principles 5 3.3.3 Physical layer 6 3.3.4 Data link layer 7 3.3.5 MAC sublayer 7 3.3.6 LLC sublayer 7 P
21、age 3.3.7 Optional intermediate layers 7 3.3.8 Application layer 7 3.3.9 Network management 8 3.4 Systems management 8 4 Naming and addressing in DCP 8 4.1 General overview 8 4.1.1 Naming 8 4.1.2 Addressing 9 4.1.3 Registration authority for naming and addressing 9 4.1.4 Directories 9 4.2 Global des
22、cription 9 4.3 MAC addresses 10 4.3.1 MAC address format 10 4.3.2 Predefined MAC addresses 10 4.4 LLC addresses 10 4.4.1 LLC address format 10 4.4.2 DL selector types 10 4.4.3 LLC predefined selector 10 4.5 Application process titles 11 4.5.1 Titles overview 11 4.5.2 Predefined titles 11 Annex A (in
23、formative) Bibliography 12 Annex ZA (normative) Normative references to international publications with their corresponding European publications Inside back cover Figure 1 OSI service definition 4 Figure 2 OSI data unit correspondence 4 Figure 3 Reference model 6 latest date by which the ENhas to b
24、e implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1997-07-01EN61334-4-1:1996 BSI 03-2000 3 Introduction The documents specifying communicat
25、ion through power line carrier systems aim at drawing up a comprehensive specification according to the structure of the open system interconnection model (OSI from ISO). This reference model provides a basic description. Details of the specifications are given in the other sections of part 4. This
26、document describes the communication system based on a three-layer model. Future extensions to more layers are possible. 1 Scope The scope of application of the specifications of the sections of part4is the communication through the so-called distribution line carrier technology (DLC) on both low an
27、d medium voltage distribution network. The application range based on telecommunication processes is wide and cannot be described exhaustively in this section; application examples are: control and monitoring of the distribution network, order broadcast, control of user interfaces, public lighting,
28、traffic lights supervision, automatic meter reading, etc. Extensions to other communication media are also allowed. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC 1334-4. At the time of p
29、ublication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this section of IEC1334-4are encouraged to investigate the possibility of applying the most recent editions of the normative documents listed below. Members of IEC and I
30、SO maintain registers of currently valid International Standards. IEC/FDIS 1334-4-32, Distribution automation using distribution line carrier systems Part 4: Data communication protocols Section 32: Data link layer Logical link control 1) . IEC 1334-4-41:1996, Distribution automation using distribut
31、ion line carrier systems Part 4: Data communication protocols Section 41: Application protocols Distribution line message specification. IEC/FDIS 1334-4-42, Distribution automation using distribution line carrier systems Part 4: Data communication protocols Section 42: Application protocols Applicat
32、ion layer 2) . ISO/IEC 7498-3:1989, Information processing systems Open Systems Interconnection Basic Reference Model Part 3: Naming and addressing. ISO/IEC 8802-2:1994, Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Specific r
33、equirements Part 2: Logical link control. 3 Description of the reference model 3.1 Introduction The specification of a communication system, such as an industrial local network or a set of interconnected subnetworks serves the following purpose: opening of the corresponding equipment to distributed
34、applications, giving official recognition to, and perpetuating, ongoing developments, implementing tools and structures for conformance testing in order to promote the interworking capability. The distribution line carrier transmission network fully justifies such a specification since this communic
35、ation system can be used for a large number of devices with various functions (station control unit, remote controlled feeder switch, meters, transformer station concentrators, portable input stations, lighting sources, automatic traffic lights at crossroads) which are manufactured by several compet
36、ing suppliers. According to the rules in the field of telecommunication this specification should be comprehensive and unambiguous and should comply with the economic requirements of final applications. 1) At present at the stage of Final Draft International Standard (57/266/FDIS). 2) At present at
37、the stage of Final Draft International Standard (57/265/FDIS).EN61334-4-1:1996 4 BSI 03-2000 3.2 Basic principles of the OSI model 3.2.1 Layered architecture The purpose of the OSI standardisation is the development of standardised telecommunication networks, capable of supporting a wide range of he
38、terogeneous equipment in order to form an “open system”. So that this heterogeneity may be possible, the OSI standards are restricted to the specification of the functions to be performed by each open system and of the protocols which are to be implemented between these systems. They avoid prescribi
39、ng a particular mode for the achievement of the Corresponding functions. Thus, the OSI standards specify the behavior of open systems as a whole in their exchanges with other open systems and not their internal operation. The conformity of a real system with the given specifications is based on the
40、external view of its behavior during its exchanges with other systems. Among the different models for the organisation of activities, the OSI has chosen the layered model and features seven layers: physical layer, data link layer, network layer, transport layer, session layer, presentation layer and
41、 application layer. 3.2.2 Services and protocols The OSI model defines elementary concepts in order to describe the operation of each layer through its relationships with adjacent layers. Figure 1 OSI service definition Figure 2 OSI data unit correspondenceEN61334-4-1:1996 BSI 03-2000 5 Within open
42、systems, the functions of the (N+1)-layer are carried out through (N+1)-entities. The interface between (N+1)-entities and entities with a lower index is achieved in the form of an interaction service called (N) service, at right angles with access points called (N)-SAP. The cooperation between (N+1
43、)-entities in order to carry out the functions of the (N+1)-layer is governed by the (N+1)-protocol. With regard to the information exchange, the (N1) service performs the transfer of (N1) service-data-units (N1) SDUs between (N1)-SAPs. Thus, the (N)-entities can exchange (N)-protocol-data-units (N)
44、-PDUs by putting them in (N1)-SDUs. Each (N)-PDU can include the (N)-protocol-control-information (N)-PCI and the(N)-user-data. 3.3 Reference model Although OSI describes seven layers for a full implementation, it is possible to reduce the implementation complexity for simple systems to a three laye
45、r, or collapsed, architecture. The minimally retained layers are: physical layer, data link and application layer. Based on this collapsed architecture it is possible to build the communication systems used for low voltage DLCapplications. In order to leave the door open for future, more complex, sy
46、stems, especially on the medium voltage networks, the interface between the data link and the application layer is specified generally enough to later include other layers, for example network or transport layers, should the system functionally call for it (see 3.3.7). 3.3.1 Minimal three-layer arch
47、itecture The method used for the drawing up of the Data Communication Protocol (DCP) specification consisted in defining the state-of-the-art existing standards and designing the collection of service entities as a whole. Whenever possible, already available and well-tried specification elements hav
48、e been re-used (IEC, ISO, IEEE standards). The global approach of the different service entities which make up the protocol layers ensures the balance and robustness of the whole without neglecting any part of the specification. Thus, the network management has been taken into account in the concept
49、ion of each layer. The protocol selection is determined by the following issues: search for high effectiveness with low baud rates and high propagation times; low requirement with regard to interconnection and meshed networks; search for optimal channel availability for the concentrator station; high level of automation for administration functions; the difficult nature of the distribution network as a communications channel; the whole combined with a low-cost solution. These consider
