1、 IEC 61158-4-7Edition 1.0 2007-12INTERNATIONAL STANDARD Industrial communication networks Fieldbus specifications Part 4-7:Data-link layer protocol specification Type 7 elements IEC 61158-4-7:2007(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SU
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9、 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 61158-4-7Edition 1.0 2007-12INTERNATIONAL STANDARD Industrial communication networks Fieldbus specifications Part 4-7:Data-link layer protocol specification Type
10、 7 elements INTERNATIONAL ELECTROTECHNICAL COMMISSION XEICS 35.100.20;25.040.40 PRICE CODEISBN 2-8318-9434-4LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 61158-4-7 IEC:2007(E)CONTENTS FOREWORD.6 INTRODUCTION.8 1 Scope.9 1.1 General
11、.9 1.2 Specifications.9 1.3 Procedures.9 1.4 Applicability.9 1.5 Conformance.9 2 Normative references.10 3 Terms,definitions,symbols and abbreviations.10 3.1 Reference model terms and definitions.10 3.2 Service convention terms and definitions.11 3.3 Other terms and definitions.12 3.4 Symbols and ab
12、breviations.16 4 Overview of the DL-protocol.18 4.1 Overall description of medium allocation.18 4.2 Types of entities.20 4.3 Addressing.23 4.4 Flow control.29 4.5 Graphical representation.31 5 General structure and encoding of PhIDUs and DLPDUs and related elements of procedure.32 5.1 DLPDU formats
13、and components.32 5.2 Description of each DLPDU component.32 5.3 PhIDU structure and encoding.36 5.4 Common DLPDU structure,encoding and elements of procedure.37 5.5 Valid DLPDU types.37 5.6 DLL timers.39 6 DLPDU-specific structure,encoding and element of procedure.43 6.1 General.43 6.2 Buffer read.
14、43 6.3 Buffer write.44 6.4 Buffer transfer.44 6.5 Specified explicit request.45 6.6 Free explicit request.50 6.7 Messaging.53 6.8 Acknowledged messaging.58 6.9 Numbering of acknowledged messages.62 6.10 Behavior with mismatched parameters.64 7 DL-service elements of procedure,interfaces and conforma
15、nce.66 7.1 General.66 7.2 Producer/consumer entity.67 7.3 Protocol elements by service.70 7.4 Bus arbitrator operation.77 7.5 Bridges.85 7.6 Interfaces.92 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61158-4-7 IEC:2007(E)3 7.7 Confo
16、rmance.94 Annex A(informative)Exemplary FCS implementation.97 Annex B(informative)Object modeling.99 B.1 Modeling of the IDENTIFIER object.99 B.2 Description of the IDENTIFIER object attributes.99 B.3 Modeling of the QUEUE object.103 B.4 Description of the QUEUE object attributes.103 B.5 Modeling of the BUFFER object.104 B.6 Description of the BUFFER object attributes.104 Annex C(informative)Topology of multi-segment DL-subnetwork.106 C.1 Introduction.106 C.2 Global specification.106 C.3 Local s
