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1、BRITISH STANDARD BS EN 60870-6-2:1996 IEC 870-6-2: 1995 Telecontrol equipment and systems Part 6: Telecontrol protocols compatible with ISO standards and ITU-T recommendations Section 2: Use of basic standards (OSI layers 1-4) The European Standard EN 60870-6-2:1995 has the status of a British Stand
2、ard ICS 33.200 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:27:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60870-6-2:1996 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Boar
3、d and comes into effect on 15 August 1996 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference PEL/57 Draft for comment 90/25650 DC ISBN 0 580 25636 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted
4、to Technical Committee PEL/57, Power system control and associated communications, upon which the following bodies were represented: Association of Consulting Engineers BEAMA Ltd. BEAMA Metering Association (BMA) EEA (Association of Electronics, Telecommunications and Business Equipment Industries)
5、Electricity Association GAMBICA (BEAMA Ltd.) Transmission and Distribution Association (BEAMA Ltd.) Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:27:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60870-6-2:1996 BSI 11-1999i Co
6、ntents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 60870-6-23 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:27:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60870-6-2:1996 ii BSI 11-1999 National forewor
7、d This British Standard has been prepared by Technical Committee PEL/57 and is the English language version of EN 60870-6-2:1995 Telecontrol equipment and systems Part 6: Telecontrol protocols compatible with ISO standards and ITU-T recommendations Section 2: Use of basic standards (OSI layers 1-4)
8、published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 870-6-2:1995 published by the International Electrotechnical Commission (IEC). Cross-references Publication referred toCorresponding British Standard BS 4727 Glossary of electrotechnical powe
9、r, telecommunication, electronics, lighting, and colour terms Part 2 Terms particular to power engineering IEC 50(371):1984Group 12:1990 Telecontrol terminology Part 3 Terms particular to telecommunications and electronics IEC 50(721):1991Group 03:1992 Telegraphy, facsimile and data communication IE
10、C 870-1-3:1990BS 7404 Telecontrol equipment and systems Part 1 General considerations Section 1.3:1991 Glossary ISO 2110:1989BS ISO 2110:1989 Information technology. Data communications. 25-pole DTE/DCE interface connector and contact number assignments ISO 2382-9:1984BS ISO 2382 Information technol
11、ogy. Vocabulary Part 9:1984 Data communication ISO/IEC 3309:1993BS ISO/IEC 3309:1993 Information technology. Telecommunications and information exchange between systems. High-level data link control (HDLC) procedures. Frame structure ISO/IEC 4335:1993BS ISO/IEC 4335:1993 Information technology. Tele
12、communications and information exchange between systems. High-level data link control (HDLC) procedures. Elements of procedures ISO 4903:1989BS ISO 4903:1989 Information technology. Data communication. 15-pole DTE/DCE interface connector and contact number assignments ISO 7776:1986BS 5397 High-level
13、 data link control (HDLC) procedures Part 7:1990 Specification for X.25 LAPB-compatible DTE data link procedures ISO/IEC 7809:1993BS ISO/IEC 7809:1993 Information technology. Telecommunications and information exchange between systems. High-level data link control (HDLC) procedures. Classes of proce
14、dures ISO/IEC 8072:1994BS ISO 8702:1994 Information technology. Open Systems Interconnection. Transport service definition EN 28073:1993 (ISO/IEC 8703:1992) BS EN 28073:1994 Information technology. Telecommunications and information exchange between systems. Open Systems Interconnection. Protocol fo
15、r providing the connects-mode transport service Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:27:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60870-6-2:1996 BSI 11-1999iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British S
16、tandards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Publication referred toCorresponding British Standard ISO/IEC 8208:1990BS ISO/IEC 8208:1990 Information technology. Data communications. X.25 packet l
17、ayer protocol for data terminal equipment ISO/IEC 8348:1993BS ISO/IEC 8348:1993 Information technology. Open systems interconnection. Network service definition ISO 8602:1987BS 7222:1990 Open systems interconnection: connectionless-mode transport protocol specification ISO 8648:1988BS 7221:1989 Open
18、 systems interconnection: specification for internal organization of the Network Layer ISO 8802-2:1989BS ISO 8802 Information technology. Local and metropolitan area networks Part 2:1989 Logical link control ISO/IEC 8878:1992BS ISO/IEC 8878:1992 Information technology. Telecommunications and informa
19、tion exchange between systems. Use of X.25 to provide the OSI connection-mode network service BS ISO/IEC 8880 Information technology. Telecommunications and information exchange between systems. Protocol combinations to provide and support the OSI Network Service ISO/IEC 8880-2:1989Part 2:1989 Provi
20、sion and support of the connection-mode Network Service ISO/IEC 8880-3:1990Part 3:1990 Provision and support of the connectionless-mode Network Service ISO/IEC 8886:1992BS ISO/IEC 8886:1992 Information technology. Telecommunications and information exchange between systems. Data link service definit
21、ion for Open System Interconnection ISO/IEC 10022:1990BS ISO/IEC 10022:1990 Information technology. Open system interconnection. Physical service definition ISO/IEC TR 10172:1991 BS/ISO TR 10172:1991 Information technology. Telecommunications and information exchange between systems. Network Transpo
22、rt Protocol interworking specification Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the EN title page, pages 2 to 28, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated.
23、This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:27:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:27:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EURO
24、PEAN STANDARD NORME EUROPENNE EUROPISCHE NORME EN 60870-6-2 November 1995 ICS 33.200 Descriptors: Telecontrol, data transmission, transport layer, network layer, data link layer, physical layer, protocol, Open Systems Interconnection, communication, interworking, end system, intermediate system, ser
25、vice English version Telecontrol equipment and systems Part 6: Telecontrol protocols compatible with ISO standards and ITU-T recommendations Section 2: Use of basic standards (OSI layers 1-4) (IEC 870-6-2:1995) Matriels et systmes de tlconduite Partie 6: Protocoles de tlconduite compatibles avec les
26、 normes ISO et les recommendations de IUIT-T Section 2: Utilisation des normes de base (couches OSI 1 4) (CEI 870-6-2:1995) Ferneinwirkungen und -systeme Teil 6: Fernwirkprotokolle, die mit ISO-Normen und ITU-T-Empfehlungen kompatibel sind Hauptabschnitt 2: Anwendungen der Grundnormen (OSI-Schichten
27、 1 bis 4) (IEC 870-6-2:1995) This European Standard was approved by CENELEC on 1995-09-20. 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-da
28、te lists 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
29、 the 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, Lu
30、xembourg, 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 Bru
31、ssels 1995 Copyright reserved to CENELEC members Ref. No. EN 60870-6-2:1995 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:27:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60870-6-2:1995 BSI 11-1999 2 Foreword The text of document 57/201/DIS, future edition 1 of IEC 870-6-2, prepared
32、 by IEC TC 57, Power system control and associated communications, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60870-6-2 on 1995-09-20. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “inform
33、ative” are given for information only. In this standard, Annex A, Annex B and Annex ZA are normative and Annex C is informative. Annex ZA has been added by CENELEC. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Definitions5 4Abbreviations8 5Transport layer8 5.1General present
34、ation of the transport layer8 5.2The transport service9 5.3The transport protocol9 6Network layer10 6.1Presentation of the network layer10 6.2The network service11 6.3The network protocol12 7Sub-networks13 7.1Packet switched network14 7.2Circuit switched network18 Annex A (normative) Transport proto
35、col Elements of procedure24 Annex B (normative) Transport protocol Protocol classes24 Annex C (informative) Bibliography25 Annex ZA (normative) Normative references to international publications with their corresponding European publications25 Figure 1 Scenario description of a packet switched data
36、network15 Figure 2 Model description of a packet switched data network16 Figure 3 Scenario description of a circuit switched data network18 Figure 4 Model description of a circuit switched data network19 Figure 5 Scenario description of a switched telephone network21 Figure 6 Model description of a
37、switched telephone network21 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1996-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 1996-07-01 Licensed Copy:
38、sheffieldun sheffieldun, na, Sat Nov 11 09:27:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60870-6-2:1995 BSI 11-19993 Introduction IEC 870: “Telecontrol equipment and systems” is composed of six parts, of which part 6 is concerned with “telecontrol protocols compatible with ISO standards and IT
39、U-T recommendations”. The aim of part 6 is the standardization of functional profiles for electric power systems. These FPs are to provide the means for specifying complete, coherent, working systems for end-to-end communication and interworking. IEC 870-6-1 establishes the overall context of part 6
40、, describing exactly what part 6 is to contain, what form it will take, and to what it applies. This includes document structure, scope, requirements, generic communication network solutions, and the form in which the standard will be developed. It is an essential prerequisite for the sections which
41、 follow. 1 Scope This section of IEC 870-6 considers the standards related to layers 1-4 of the OSI reference model. Its objectives are as follows: to describe the role and the functions carried out by each layer; to list the relevant ISO basic standards; to give general considerations and recommend
42、ations for the use of the standards in the application context of part 6. The use of these standards in their application to end systems (ES) and intermediate systems (IS) is described. An ES is one which contains all seven layers of the OSI reference model as well as an application process. An IS i
43、s a communication relay between sub-networks. ESs and ISs are considered in IEC 870-1-4 and IEC 870-6-1. The description of the functions carried out by each layer is intended to be fairly complete but makes no claim to being exhaustive. For more details, the relevant sections of ISO 7498 should be
44、consulted as well as the listed ISO basic standards. Second, the ISO standards listed are the fundamental ones related to each layer; again, the list does not claim to be exhaustive. Finally, the general considerations and recommendations are intended to present the basic issues involved in the appl
45、ication of the standards and to lay down the fundamental manner in which they are to be used. The purpose is to codify the ground rules for making the specific comprehensive and detailed choices necessary for the definition of the functional profiles which are the subject of part 6-5 and subsequent
46、parts. This section is organized according to the OSI layers. Because there is a strong interdependence in the choice of protocols in the three lowest layers, these layers are grouped into clauses of this section. Within these clauses, the organization is according to the type of transmission networ
47、k. The treatment of each layer contains the following elements: introduction: briefly describing the layers function and role in the overall communication process; reference documents; services; list of services and QOS parameters included in the standards; guidelines and recommendations concerning
48、the choice and use of these services; protocols; list of protocol classes, subsets, etc. included in the relevant standards; guidelines and recommendations concerning the choice and use of these protocols. 2 Normative references The following normative documents contain provisions which, through ref
49、erence in this text, constitute provisions of this section of IEC 870-6. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this section of IEC 870-6 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 50(371):1984, International Electrotechnical Vocabulary (