1、BRITISH STANDARD - Distribution automation using distribution line carrier systems - Part 4-33: Data communication protocols - Data link layer - Connection oriented protocol The European Standard EN 61334433A998 has the status of a British Standard ICs 29.240.99; 33.040.40; 35.100.20 BS EN 61334-4-3
2、3:1998 IEC 61334-4-33: 1998 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 61334-4-33 : 1998 direction of the Electrotechnicai Amd. No. Date Sector Commitke, was published under the authority of the Standards Committee and comes intn effect on 16 December 1998 National
3、foreword Text affected This British Standard is the English ianguage version of EN 613344331998. It is identid with IEC 61- 1998. The UK participation in its preparation was entrusted to Technical Committee PEIJ57, Power system contxol and associated comunications, which has the responsibility to: -
4、 aid enquirers to understand the tea - present to the responsible inte - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Flom 1 January 1997, ai IEC publications
5、have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of thne during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that C
6、EN and CENELEC standards normaiiy include an mex which lists normative references to inkrnatiod publications with their corresponding or European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards
7、Catalogue under the section entitled International standcurds Correspondence Index, or using the Find facility of the BSI standards Electsonic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract Users of a British Standard are responsible for their co
8、rrect application. Compliance with a British Standard does not of itself confer immunity from legal obligations. O BSI 1998 I l I l ISBN O 680 30969 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 6 1334-4-33 October 1998 ICs 29.240.20; 33.200 Descriptors: Electrical power, distribution autom
9、ation, distribution line carrier systems, data communication protocols, data link layer, connection oriented protocol English version Distribution automation using distribution line carrier systems Part 4-33: Data communication protocols Data link layer - Connection oriented protocol (IEC 61 334-4-3
10、3: 1998) Automatisation de la distribution laide de systmes de communication courants porteurs Partie 4-33: Protocoles de communication de donnes Couche liaison de donnes Protocole orient connexion (CE1 61 334-4-331998) Verteilungsautomatisierung mit Hilfe von Trgersystemen auf Verte i I u ng s le i
11、t u n g en Teil 4-33: Datenkommunikationsprotokolle Sicherungsschicht Verbindungsorientiertes Protokoll (IEC 61 334-4-331998) This European Standard was approved by CENELEC on 1998-1 0-01. CENELEC members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions fo
12、r giving this European Standard the status of a national standard without any alteration. Up-to-date 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 offi
13、cial versions (English, french, German). A version in any other language made by translation under 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 comm
14、ittees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Gemnany, Greece, Iceiand. Ireland, Italy. Luxembourg, Netherlands, Norway, Ponugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical standardization Comit Europen de Normalisation Elec
15、trotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 1998 CENELEC - Ali rights of exploitation in any form wd by any means reserved worldwide for CENELEC members. Ref. No. EN 61 3344331 998 E Page 2 EN 61334-4-33:1998 Foreword The t
16、ext of document 57/355/FDIS, future edition 1 of IEC 61334-4-33, 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 61 334-4-33 on 1998-10-01. The following dates were fixed: - latest date by wh
17、ich the EN has to be implemented at national 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 This standard is to be used in conjunction with EN 61 334
18、-4-32:7996. Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 61 334-4-33: 1 998 was approved by CENELEC as a European Standard without any mo
19、dification. STD-BSI BS EN bL334-4-33-ENGL 1998 E Lb24bb9 0745999 OTO I Page 3 EN 61334-4-33:1998 CONTENTS Page . INTRODUCTION 6 Clause . 1 General 7 1.2 Normative references . 7 1.1 Scope and object . 7 1.3 Acronyms and definitions . 8 2 LtC service specification . 2.1 Overview of interactions . 2.1
20、.1 Basic services 2.1.2 Unsolicited services . 2.1.3 Management services . 2.2 DL,Data.request 2.2.1 Function . 2.2.2 Structure 2.2.3 Use 2.3 DL-Dataxonfirm 2.3.1 Function . 2.3.2 Structure 2.3.3 Use 2.4 DLJata.indication . 2.4.1 Function . 2.4.2 Structure 2.4.3 Use 2.5 DL_Open.request . 2.5.1 Funct
21、ion . 2.5.2. Structure 2.5.3 Use 2.6 DL-0pen.confirm . 2.6.1 Function . 2.6.2 Structure 2.6.3 Use 2.7 DL-Connect.request 2.7.1 Function . 2.7.2 Structure 2.7.3 Use 2.8 DL-Connect.confirm . 2.8.1 Function . 2.8.2 Structure 2.8.3 Use 8 8 8 9 11 11 11 11 11 12 12 12 12 12 12 12 12 13 13 13 13 13 13 14
22、14 14 14 14 14 14 14 15 15 8 BSI 1998 Clause 2.9 2.10 2.1 1 2.12 2.13 2.14 2.15 DL.Disconnect . req uest 2.9.1 Function . 2.9.2 Structure 2.9.3 Use DL-Disconnect.conf irm 2.1 0.1 Function . 2.10.2 Structure 2.10.3 Use DL-Disconnect.indication . 2.1 1.1 Function . 2.11.2 Structure 2.11.3 Use DL-Close
23、.request 2.1 2.1 Function . 2.12.2 Structure 2.12.3 Use DL-Closexonf irm 2.1 3.1 Function . 2.1 3.2 Structure 2.13.3 Use DL-TesLrequest 2.14.1 Function . 2.14.2 Structure 2.14.3 Use DL-Test .conf i rm 2.1 5.1 Function . . 2.15.2 Structure 2.15.3 Use . . . 3 LLC To MAC sublayer interface . 3.1 3.2 3.
24、3 3.4 Overview of interactions . MA-D,ata.request 3.2.1 .Function . 3.2.2 Structure 3.2.3 Use MA-Data.confirm . 3.3.1 Function . 3.3.2 Structure 3.3.3 Use MA-Datahdication 3.4.1 Function . 3.4.2 Structure 3.4.3 Use page 15 15 15 15 16 16 16 16 16 16 17 17 17 17 17 17 18 18 18 18 18 18 18 19 19 19 19
25、 19 19 19 19 19 20 20 20 20 20 20 20 20 21 21 O BSI 1998 Clause Page 4 LLC protocol data unit structure (LLC PDU) . 21 4.2 LLC-PDU format 21 4.1 General 21 4.3 Address fields 21 4.3.1 Individual and group destination Lsap . 22 4.3.2 Predefined addresses . 22 4.4 Control field . 22 4.5 Invalid LLC-PD
26、U 23 5 LLC procedures description . Overview of the procedures 5.1.1 Procedure for addressing . 5.1.2 L-pdu transmission 5.1.3 Information transmission 5.1.4 Time-out recovery 5.1.5 information reception . 5.1.6 Connection Set-up 5.1.7 Connection close-down 5.1.8 Test sequence . 5.1.9 Frame reject c
27、onditions 5.1.10 List of the LLC parameters . 5.1.10.1 Length of a PDU 5.1.1 0.2 MAC available Service-Class . 5.1.10.3 LLC station role 5.1 . 23 23 23 24 24 24 25 25 25 26 26 26 26 26 ?3 Annex ZA Normative references to international publications with their corresponding European publications 27 O
28、BSI 1998 STD-BSI BS EN bL334-4-33-ENGL 1778 M Lb2LibbS 174b002 273 Page 6 EN 61334-4-33:1998 INTRODUCTION This part of IEC 61334 is closely related to IEC 61334-4-32 that refers to the connectionless mode LLC protocol as an example of the use of LLC services by the LLC user in the case of collapsed
29、architecture (see 1.1 of IEC 61334-4-32). This standard shows how the basic LLC services are provided through a connection-oriented mode (CO) LLC protocol. The CO mode is mainly used for internode communications in networked implementations and for time-critical applications where the retry timer on
30、 transmission errors needs to be closely tied to each subnetwork link characteristics. The main addition, while using the CO mode instead of connectionless, is in the provided quality of LLC service, in terms of reliability in message flow-controlled delivery and automatic retries on transmission er
31、ror. It should be noted that the LLC service primitives allow a connectionless, unacknowledged data transfer at the LLC user interface, with use of specific quality of service parameter values, saving the semantics of the services described in IEC 61334-4-32 so, in this standard, only the additional
32、 specifications or changes, needed when invoking the LLC CO protocol, are provided and, for the sake of clearness, they are reported using or recalling the same text structure as in IEC 61 334-4-32. Protocol data units of this standard are specified with orthogonal formats in respect of those in IEC
33、 61334-4-32, so that both the sets of procedures can share the same link: the way to synchronize the use of the link by the two sets of procedures is outside the scope of this standard. The LLC CO procedure allows bidirectional, full duplex data transfer services between a primary station and a numb
34、er of secondary stations: nevertheless, the primary station role could be changed during the time and the way to manage that is outside the scope of this standard. To improve the efficiency of the protocol, at system configuration level, it is possible to define two types of LLC-CO PDU formats accor
35、ding to the number of users of LLC-CO as indicated below: LLC-CO Type 1: the LLC PDU format presents DSAP and SSAP fields because there are more than one LLC-CO user (figure 6). LLC-CO Type 2: the LLC PDU format does not present DSAP and SSAP fields because there is only one LLC-CO user (figure 7).
36、- _ STD-BSI BS EN bL334-4-33-ENGL 1778 lib24bb9 07LSbOD3 12T W Page 7 EN 61334-4-331998 DISTRIBUTION AUTOMATION USING DISTRIBUTION LINE CARRIER SYSTEMS - Part 4-33: Data communication protocols - Data link layer - Connection oriented protocol 1 General 1.1 Scope and object This pari of IEC 61334 cov
37、ers the services required of, or by, the data communication protocol (DCP) logical link control (LLC) sublayer entity at the logical interfaces with the LLC-user layer and the MAC sublayer, using the connection-oriented LLC procedures. Services are specified showing the information flow between the
38、LLC user and the MAC service, by describing the service primitives and parameters which characterize each service: these service primitives are those specified in IEC 61334-4-32 and in this standard, only the specific details and changes for connection-oriented procedures are given. The primitives i
39、n this standard are associated with the connection-oriented mode (CO) LLC protocol, providing connectionless services: a data transfer mode outside the connection context is also provided and harmonized with the CO procedures. The way to set up, close down and monitor the connection status is provid
40、ed through services primitives to the LLC sublayer management entity and these services are not made available to the LLC user interface. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this pari of IEC 613
41、34. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 61334 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.
42、 Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 61 334-4-32:1996, Distribution automation using distribution line carrier systems - Part 4: Data communication protocols - Section 32: Data link layer - Logical link control (LLC) ISOAEC 43351 993, Information
43、 technology - Telecommunications and information exchange between systems - High-level data link control (HDLC) procedures - Elements of procedures - STD-BSI BS EN bL334-4-33-ENGL 1778 M Lb24bb7 074bLI Obb H Page 8 EN 61334-4-33:1998 1.3 Acronyms and definitions For the purpose of this part of IEC 6
44、1334, the acronyms and definitions of IEC 61334-4-32 along with the following apply. CO HDLC Lcls NRM TWA NDM Connection-oriented mode of LLC protocol. High-level data link control procedures. Link class parameter in LLC service primitives. Normal response mode, one of the operational data link mode
45、 of the HDLC. Two-way alternate, a special case of NRM. Normal disconnect mode, one of the non-Operational data link mode of the HDLC. 2 LLC service specification This clause specifies the services required to the logical link control sublayer by its user to exchange packets with remote peer user en
46、tities using DCP LLC-CO operations at the logical link control sublayer. The services are described in an abstract way. 2.1 Overview of interactions 2.1.1 Basic services Subclause 2.1.1 of IEC 61334-4-32 applies with the following addition. These are the only services made available to the LLC user
47、service interface and according to the type of LLC PDU, type 1 gr type 2, the fields SSAP and DSAP will be present or not. LLC-CO user LLC-CO :. MAC MAC LLC-CO LLC-CO user Primary station Figure 1 - Send - Confirm Cecondaty station JEC 853339 LLC-CO user ucco MAC MAC LLC-CO LLCCO user I-Frame Pnmaty
48、 station Secondary station IEC 664s3 Figure 2 - Send - No Confirm LLC-CO MAC MAC LLC-CO LLC-CO user LLC-CO user Primary station Figure 3 - Request - Response 2.1.2 Unsolicited services Secondary station IEC B65I9.3 None of the unsolicited services listed in 2.1.2 of IEC 61334-4-32 are provided by th
49、e LLC-CO procedure. Unsolicited response coming from peripheral stations can be collected through an appropriate polling policy using the LLC-CO protocol procedures. STD-BSI BS EN bL334-4-33-ENGL 1998 Lb24bb9 074bUUb 737 Page 10 EN 61334-4-33:1998 DL-Data.ind LLC-CO user LLC-CO MAC MAC LLC-CO LLC-CO user LLC-CO user Primary station Secondary station IEC ee3M DL-Data.ind Figure 4 - Unsolicited response with confirm LLC-CO MAC MAC LLC-CO LLC-CO user Primary station Secondary station IK: M7m8 Figure 5 - Unsolicited response without confirm 1 EN 61334-4-33:1998 2.1
