1、 IEC 61158-3-7 Edition 1.0 2007-12 INTERNATIONAL STANDARD NORME INTERNATIONALE Industrial communication networks Fieldbus specifications Part 3-7: Data-link layer service definition Type 7 elements Rseaux de communication industriels Spcifications des bus de terrain Partie 3-7: Dfinition du service
2、de la couche de liaison de donnes lments de Type 7 IEC 61158-3-7:2007 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or
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16、s: csciec.ch. IEC 61158-3-7 Edition 1.0 2007-12 INTERNATIONAL STANDARD NORME INTERNATIONALE Industrial communication networks Fieldbus specifications Part 3-7: Data-link layer service definition Type 7 elements Rseaux de communication industriels Spcifications des bus de terrain Partie 3-7: Dfinitio
17、n du service de la couche de liaison de donnes lments de Type 7 INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE V ICS 25.040.40; 35.100.20 PRICE CODE CODE PRIX ISBN 978-2-8322-0988-2 Registered trademark of the International Electrotechnical Commission Marque dpo
18、se de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61158-3-7 IEC:2007 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Sco
19、pe . 7 1.1 Overview . 7 1.2 Specifications 7 1.3 Conformance . 7 2 Normative references 8 3 Terms, definitions, symbols, abbreviations and conventions 8 3.1 Reference model terms and definitions 8 3.2 Service convention terms and definitions . 9 3.3 Data-link service terms and definitions . 9 3.4 Sy
20、mbols and abbreviations 13 3.5 Common conventions 14 4 Data-link layer services and concepts . 16 4.1 Field of application, object . 16 4.2 General description of services 16 4.3 Sequences of primitives . 21 4.4 Buffer writing . 22 4.5 Buffer reading 24 4.6 Buffer transfer . 25 4.7 Explicit request
21、for buffer transfer 26 4.8 Unacknowledged message transfer 30 4.9 Acknowledged message transfer 32 Bibliography 35 Figure 1 Relationships of DLSAPs, DLSAP-addresses and group DL-addresses . 11 Figure 2 General description of medium allocation 20 Figure 3 Primitives associated with the buffer writing
22、 service 23 Figure 4 Primitives associated with the buffer reading service . 24 Figure 5 Primitives associated with the buffer transfer service 25 Figure 6 Primitives associated with the specified explicit request for a buffer transfer 28 Figure 7 Primitives associated with the free explicit request
23、 for a buffer transfer . 29 Figure 8 Primitives associated with the unacknowledged message transfer request service 31 Figure 9 Primitives associated with the acknowledged message transfer request service 33 Table 1 Summary of DL-services and primitives for buffer transfers 22 Table 2 Summary of DL-
24、services and primitives for message exchanges 22 Table 3 DL-Put primitives and parameters 23 Table 4 DL-Get primitives and parameters 24 Table 5 DL-Buffer-Sent primitive and parameter . 26 Table 6 DL-Buffer-Received primitive and parameter 26 Table 7 DL-Spec-Update primitives and parameters . 28 Tab
25、le 8 DL-Free-Update primitives and parameters 30 61158-3-7 IEC:2007 3 Table 9 DL-Message primitives and parameters . 31 Table 10 DL-Message-Ack primitives and parameters . 33 4 61158-3-7 IEC:2007 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INDUSTRIAL COMMUNICATION NETWORKS FIELDBUS SPECIFICATIONS Pa
26、rt 3-7: Data-link layer service definition Type 7 elements FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-o
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33、cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts an
34、d members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publica
35、tion or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publica
36、tion may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. NOTE Use of some of the associated protocol types is restricted by their intellectual-property-right holders. In all cases, the commitment to limited release of intellectual-pro
37、perty-rights made by the holders of those rights permits a particular data-link layer protocol type to be used with physical layer and application layer protocols in type combinations as specified explicitly in the IEC 61784 series. Use of the various protocol types in other combinations may require
38、 permission of their respective intellectual-property-right holders. International Standard IEC 61158-3-7 has been prepared by subcommittee 65C: Industrial networks, of IEC technical committee 65: Industrial-process measurement, control and automation. This first edition and its companion parts of t
39、he IEC 61158-3 subseries cancel and replace IEC 61158-3:2003. This edition of this part constitutes an editorial revision. This edition includes the following significant changes with respect to the previous edition: a) deletion of the former Type 6 fieldbus, and the placeholder for a Type 5 fieldbu
40、s data-link layer, for lack of market relevance; b) addition of new types of fieldbuses; 61158-3-7 IEC:2007 5 c) division of this part into multiple parts numbered 3-1, 3-2, , 3-19. This bilingual version (2013-07) corresponds to the monolingual English version, published in 2007-12. The text of thi
41、s standard is based on the following documents: FDIS Report on voting 65C/473/FDIS 65C/484/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. The French version of this standard has not been voted upon. This publica
42、tion has been drafted in accordance with ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under http:/webstore.iec.ch in the data related to the specific publication. At t
43、his date, the publication will be: reconfirmed; withdrawn; replaced by a revised edition, or amended. NOTE The revision of this standard will be synchronized with the other parts of the IEC 61158 series. The list of all the parts of the IEC 61158 series, under the general title Industrial communicat
44、ion networks Fieldbus specifications, can be found on the IEC web site. 6 61158-3-7 IEC:2007 INTRODUCTION This part of IEC 61158 is one of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the “three-layer”
45、fieldbus reference model described in IEC/TR 61158-1. Throughout the set of fieldbus standards, the term “service” refers to the abstract capability provided by one layer of the OSI Basic Reference Model to the layer immediately above. Thus, the data-link layer service defined in this standard is a
46、conceptual architectural service, independent of administrative and implementation divisions. 61158-3-7 IEC:2007 7 INDUSTRIAL COMMUNICATION NETWORKS FIELDBUS SPECIFICATIONS Part 3-7: Data-link layer service definition Type 7 elements 1 Scope 1.1 Overview This part of IEC 61158 provides common elemen
47、ts for basic time-critical messaging communications between devices in an automation environment. The term “time-critical” is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to comp
48、lete specified actions within the time window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life. This standard defines in an abstract way the externally visible service provided by the Type 7 fieldbus data-link layer in terms of
49、 a) the primitive actions and events of the service; b) the parameters associated with each primitive action and event, and the form which they take; and c) the interrelationship between these actions and events, and their valid sequences. The purpose of this standard is to define the services provided to the Type 7 fieldbus application layer at the boundary between the appl
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