1、BRITISH STANDARD Distribution automation using distribution line carrier systems - Part 4-61: Data communication protocols - Network layer - Connectionless protocol The European Standard EN 61334-4-61 : 1998 has the status of a British Standard ICs 29.240.99; 33.040.40; 35.100.30 BS EN 61334-4-61:19
2、98 IEC 61334-4-61: 1998 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN b1334-4-bL-ENGL 1778 E 1b24bbS 0743520 O41 direction of the Eledmtechnicai Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 December
3、1998 Amd. No. BS EN 61334-4-61 : 1998 Da Textaffected National foreword This British Standard is the English ianguage version of EN 61334461:1998. It is identid with IEC 61334461:1998. The K participation in its preparation was entrusted to Technical committee PEIJ57, Power systems control and commu
4、nications, which has the responsibility to: - aid enquirers to undexstand the tea - present to the responsible intemational/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed - monitor related international and European developments an
5、d promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 6O added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during
6、 the change over from one numbering system to the other, publications may contain identi6ers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC standards nonnally include an annex which lists nomiative references to intemationai publications with their correspond
7、ing or European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or using the Find facility of the BSI Standards
8、 Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Um of a British Sandard are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legai obligations. Q BSI 1998 I l ISBN O
9、 680 30968 4 STD.BSI BS EN b1334-Y-bl-ENGL L798 m lb24bb 0743523 TBB m EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 6 1 334-4-61 Octo ber 1 998 ICs 29.240.20; 33.200 Descriptors: Electrical power, distribution automation, distribution line carrier systems, data communication protocols, netwo
10、rk layer, connectionless protocol English version Distribution automation using distribution line carrier systems Part 4-61 : Data communication protocols - Network layer Connectionless protocol . (IEC 6 1 334-4-6 1 : 1 998) Automatisation de la distribution laide de Systemes de communication couran
11、ts porteurs Verteilungsleitungen Partie 4-61 : Protocoles de communication de donnes - Couche rseau - Protocole sans connexion (CE1 6 1 334-4-6 1 : 1 998) Verteitungsautomatisierung mit Hilfe von Trgersystemen auf Teil 4-61 : Daten kommunikationsprotokolle Vermittlungsschicht Verbindungsloses Protok
12、oll (IEC 61 334-4-61 :I 998) This European Standard was approved by CENELEC on 1998-1 0-01. CENELEC members are bound to comply with the CENXENELEC Intemal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-dat
13、e 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 offcial versions (English, French, German). A version in any other language made by translation under t
14、he 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, Czech Republic. Denmark, Finland, France, Germany, Greece, Iceland, Irel
15、and, Italy, Luxembourg, 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 3
16、5,s - 1050 Brussels 1998 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61334-4-61:1998 E . STD-BSI BS EN b1334-4-bl-ENGL 1778 = Lb24bb7 0743522 714 Page 2 EN 61334-4-61:1998 Foreword The text of document 57/356/FDIS, future edit
17、ion 1 of IEC 61334-4-61, prepared 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 61 334-4-61 on 1998-10-01. The following dates were fixed: - latest date by which the EN has to be implemented at nati
18、onal level by publication of an identical national standard or by endorsement (dop) 1999-07-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2001 -07-01 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA
19、is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 61 334-4-61 :1998 was approved by CENELEC as a European Standard without any modification. Page 3 EN 61334-4-61:1998 CONTENTS INTRODUCTION . Clause 1 General . 1.1 Scope and object . 1.2 N
20、ormative references . 1.3 Acronyms and definitions . 2 N service definition 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 Overview of interactions . 2.1.1 Data transfer services 2.1.2 Management services . N-Data.request 2.2.1 Function . 2.2.2 Structure 2.2.3 Use N-Data.confirm 2.3.1 Function . 2.3.2 Structur
21、e 2.3.3 Use N-Data.indication: 2.4.1 Function . 2.4.2 Structure 2.4.3 Use N-Add-route . request . 2.5.1 Function . 2.5.2 Structure 2.5.3 Use N-Del-route.request 2.6.1 Function . 2.6;2 Structure 2.6.3 Use N-Read-table.requect 2.7.1 Function . 2.7.2 Structure 2.7.3 Use N-Read-table.confirm 2.8.1 Funct
22、ion . 2.8.2 Structure 2.8.3 Use N-Await-event.request 2.9.1 Function . 2.9.2 Structure 2.9.3 Use Page 5 11 11 11 12 12 13 13 13 14 14 14 14 14 14 15 15 15 15 15 16 16 16 16 16 17 17 17 17 17 17 17 17 18 18 18 18 18 18 18 18 O BSI 1998 STD-BSI BS EN bL334-4-bL-ENGL 1778 1b24bbS 0743524 777 Page 4 EN
23、61334-4-611998 Clause Page 2.10 N-Await-event.confirm . 2.1 0.1 Function 2.10.2 Structure . 2.10.3 Use 2.1 1 N-Local-address request . 2.1 1.1 Function . 2.1 1.2 Structure 2.11.3 Use 19 19 19 19 19 19 19 20 3 N To.LLC sublayer interface 20 , 3.1 Overview of interactions . 20 3.2 DL-Data.request 23 3
24、.3 DL-Data.confirm 23 3.4 DL-Datahdication 24 . 4 N-protocol data unit structure 4.1 General . 4.2 NPDU format . 4.3 Network address fields . 4.4 DNSAP field and the P-bit 4.5 SNSAP field and the O-bit 4.6 QoS field 4.7 Reserved field 4.8 Invalid NPDU . 5 N-protocol procedures description . 5.1 Over
25、view of the procedures 5.1.1 Procedure for transmission . 5.1.2 NPDU routing . 5.1.3 Parity bits . 5.1.4 N-entity internal parameters . 5.2 N-entity flow diagram . 5.2.1 N-Data.request flow diagram 5.2.3 DL-Data.confirm flow diagram 5.2.4 . N-protocol machine actions 5.2.2 DL-Data.indication flow di
26、agram . 24 24 24 24 25 25 25 25 25 25 25 26 26 27 27 27 27 29 30 30 6 Mapping of network layer . 31 Figures Basic layered communication architecture . Subnetwork interconnection through application gateway . Subnetwork interconnection through a node routing station Subnetwork interconnection in a mi
27、xed approach . Data transfer without acknowledgment Routing function in the network layer for messages coming from N-user Routing function in the network layer for messages to be locally delivered . Routing function in the network layer for messages to be forwarded . NPDU fields 7 8 9 10 13 21 22 23
28、 24 Annex ZA Normative references to international publications with their corresponding European publications 33 Q BSI 1998 STD-BSI BS EN bL334-4-bL-ENGL 1998 W Lb24bbS 0743525 b23 9 Page 6 EN 61334-4-61:1998 INTRODUCTION This part of IEC 61334 is closely related to IEC 61334-4-1 that refers to a m
29、inimal three-layer architecture as an example of the use of an efficient communication architecture to build a communication system used for low-voltage DLC applications. Nevertheless, the suggested layered architecture is open to support additional features which are to be implemented in the case o
30、f several subnetworks, as MV and LV networks, are used for DLC applications. The basic three layer communication architecture provides communication among applications which are hosted by stations on one single line carrier link (e.g. an LV section), as in the example represented in figure 1 : this
31、set of stations is here defined as a “subnetwork“. Furthermore, two subnetworks may be connected through an internetworking unit which hosts an application acting as gateway in case of communication between a client and a server running on stations that belong to different subnetworks (see figure 2)
32、. Another approach is to define a network layer entity (N) supporting a routing function which provides the necessary address mapping between the two subnetworks (see figure 3). In the example of figure 3, all the stations have to implement the network layer function: nevertheless, applications runn
33、ing on the same subnetwork may directly use the LLC services using a LSAP different from that assigned to the network layer entity, as defined in the following. In the general case, a mixed approach may be useful and a number of subnetworks could be crossed by a message (see figure 4 for an applicat
34、ion example). A protocol at the network layer is to be used and the entity, implementing it, is located between the N-user and the LLC layers, as defined in the fallowing architecture model. STD-BSI BS EN bL334-4-bL-ENGL 1798 Lb2Ybbl 07Li352b 5bT Page 6 EN 61334-4-61:1998 I Application layer I 1 NL
35、Management services Network layer 1 Logid link control This standard provides the N service definition and the N-protocol specification, with specific reference to the application of figure 4. Network layer mapping functions to application layer are described in clause 6. STD-BSI BS EN b1334-4-bI-EN
36、GL L978 Lb24bbS 0743527 4Tb W Page 7 EN 61334-4-61:1998 Central station Peripheral station 4 b Relationship using connectionless or connection oriented data-link mode I 4 + I I Relationship using connectionless data-link mode Application B Application A client client I ACSE-DLMS 1 I uc I Application
37、 A sewer Application B server etition 4 Figure 1 - Basic layered communication architecture STD-BSI BS EN bL334-4-bL-ENGL 1778 Lb24bb7 0743528 332 Page 8 EN 61334-4-61:1998 Subnetwork 2 Figure 2 - Subnetwork interconnection through application gateway Page 9 EN 61334-4-61:1998 Figure 3 - Subnetwork
38、interconnection through a node routing station STD.BSI BS EN bL334-4-bL-ENGL 1998 DI lb24bb7 0743530 T90 Page 10 EN 61334-4-611998 Figure 4 - Subnetwork interconnection in a mixed approach STD-BSI BS EN bL339-4-bL-ENGL 2778 LLZLiLbS 0743533 927 Page 11 EN 61334-4-61:1998 DISTRIBUTION AUTOMATION USIN
39、G DISTRIBUTION LINE CARRIER SYSTEMS - Part 4-61 : Data communication protocols - Network layer - Connectionless protocol 1 General 1.1 Scope and object This pari of IEC61334 covers the services required of, or by, the DCP network layer (N) sublayer entity at the logical interfaces with the N user la
40、yer and the LLC sublayer, using the connectionless N procedures. Services are specified showing the information flow between the N user and the LLC service, by describing the service primitives and parameters which characterize each service. The primitives in this standard are associated with the co
41、nnectionless N protocol, providing connectionless services. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this pari of IEC 61334. At the time of publication, the editions indicated were valid. All normati
42、ve documents are subject to revision, and parties to agreements based on this pari of IEC 61334 are encouraged to investigate the possibility of applying the most recent editions of normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standa
43、rds. IEC 61334-4-1 :1996, Distribution automation using distribution line carrier systems - Part 4: Data communication protocols - Section 1: Reference model of the communication system IEC 61 334-4-33:1998, Distribution automation using distribution line carrier systems - Part 4- 33: Data communica
44、tion protocols - Data link layer - Connection oriented protocol IEC 61 334-4-41 :1996, Distribution automation using distribution line carrier systems - Part 4: Data communication protocols - Section 4 I: Application protocols - Distribution line message specification IEC 61 334-4-42:1996, Distribut
45、ion automation using distribution line carrier systems - Part 4: Data communication protocols - Section 42: Application protocols - Application layer I SOA EC 7498: Information technology - Open Systems Interconnection - Basic Reference Model Page 12 EN 61334-4-611998 1.3 Acronyms and definitions LL
46、C-CO Lcls N NPDU N-primitive NSAP NSDU N-service QoS Connection oriented mode of LLC protocol Link class parameter in LLC service primitives Network layer Network layer protocol data unit Network layer service primitive Network layer service access point Network layer service data unit Service provi
47、ded by the network layer Quality of service in N-service primitives 2 N service definition The N service primitives allow a connectionless, unacknowledged data transfer at the N-user interface, improving the addressing capabilities of the underlying LLC service. The N data transfer primitive refers
48、to a network address and, in the general case, while in the global network two or more stations belonging to different subnetworks may have the same MAC station address, each of them will be univocally identified by its own unique network add ress. In details, an N user is identified by its title co
49、mposed by a network address and a NSAP selector, in a similar way as specified in IEC 61 334-4-1. A message coming from an N user has associated the network destination address and the N- entity should map it in a transmission request to the underlying LLC sublayer, with an associated LLC destination station address of the next station involved in the network path to be traversed by the message. The LLC destination station address is composed of two parts: the LSAP selector (the fixed value O1 Hex assigned to the referenced symbol N-entity-LSAP, identifying the N
