1、 IEC 61158-5-8 Edition 1.0 2007-12 INTERNATIONAL STANDARD Industrial communication networks Fieldbus specifications Part 5-8: Application layer service definition Type 8 elements IEC 61158-5-8:2007(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All rights reserved
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9、DARD Industrial communication networks Fieldbus specifications Part 5-8: Application layer service definition Type 8 elements INTERNATIONAL ELECTROTECHNICAL COMMISSION XD ICS 35.100.70; 25.040.40 PRICE CODE ISBN 2-8318-9456-5 2 61158-5-8 IEC:2007(E) CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 1.1 O
10、verview.7 1.2 Specifications8 1.3 Conformance.8 2 Normative references .8 3 Terms and definitions .9 3.1 ISO/IEC 7498-1 terms .9 3.2 ISO/IEC 8822 terms 9 3.3 ISO/IEC 9545 terms 9 3.4 ISO/IEC 8824 terms 9 3.5 Fieldbus data-link layer terms9 3.6 Fieldbus application layer specific definitions 10 3.7 A
11、bbreviations and symbols16 3.8 Conventions 16 4 Concepts20 4.1 Overview.20 4.2 Architectural relationships .20 4.3 Fieldbus Application Layer structure22 4.4 FAL naming and addressing 32 4.5 Architecture summary33 4.6 FAL service procedures.33 4.7 Notional FAL service procedures INFORMATIVE.33 4.8 C
12、ommon FAL attributes.34 4.9 Common FAL service parameters35 4.10 APDU size.36 5 Data type ASE36 5.1 General .36 5.2 Formal definition of data type objects 38 5.3 FAL defined data types38 5.4 Data type ASE service specification 42 6 Communication model specification42 6.1 ASEs.42 6.2 ARs.85 6.3 Summa
13、ry of FAL classes.91 6.4 Permitted FAL services by AREP role91 Bibliography93 Figure 1 Relationship to the OSI basic reference model.20 Figure 2 Architectural positioning of the Type 8 FAL 21 Figure 3 Client/server interactions .23 Figure 4 Push model interactions.24 Figure 5 APOs services conveyed
14、by the FAL25 Figure 6 Application entity structure.27 61158-5-8 IEC:2007(E) 3 Figure 7 Example FAL ASEs28 Figure 8 FAL management of objects.29 Figure 9 ASE service conveyance30 Figure 10 Defined and established AREPs.32 Figure 11 FAL architectural components 33 Figure 12 Data type class hierarchy e
15、xample.36 Figure 13 The AR ASE conveys APDUs between APs58 Figure 14 1-to-1 AR establishment.65 Table 1 Get attributes service parameters43 Table 2 Identify50 Table 3 Get status .51 Table 4 Initiate.53 Table 5 Terminate55 Table 6 Reject .57 Table 7 Conveyance of service primitives by AREP role 59 Ta
16、ble 8 Valid combinations of AREP roles involved in an AR .59 Table 9 AR-unconfirmed send63 Table 10 AR-establish service64 Table 11 Valid combinations of AREP classes to be related.66 Table 12 AR-abort .67 Table 13 AR-Data-Send-Acknowledge service parameters.68 Table 14 Read service parameters.73 Ta
17、ble 15 Write service parameters.74 Table 16 Information report service75 Table 17 Start service parameters .79 Table 18 Stop service parameters80 Table 19 Resume service parameters 81 Table 20 Reset service parameters82 Table 21 State transitions for a function invocation object84 Table 22 FAL class
18、 summary.91 Table 23 Services by AREP role 92 4 61158-5-8 IEC:2007(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INDUSTRIAL COMMUNICATION NETWORKS FIELDBUS SPECIFICATIONS Part 5-8: Application layer service definition Type 8 elements FOREWORD 1) The International Electrotechnical Commission (IEC) i
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28、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 Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. N
29、OTE 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-property-rights made by the holders of those rights permits a particular data-link layer protocol type to be used with physical
30、 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 permission from their respective intellectual-property-right holders. International Standard IEC 61158-5-8 has been prepare
31、d by subcommittee 65C: Industrial networks, of IEC technical committee 65: Industrial-process measurement, control and automation. This first edition and its companion parts of the IEC 61158-5 subseries cancel and replace IEC 61158-5:2003. This edition of this part constitutes a technical revision.
32、This edition of IEC 61158-5 includes the following significant changes from the previous edition: a) deletion of the former Type 6 fieldbus for lack of market relevance; b) addition of new types of fieldbuses; c) partition of part 5 of the third edition into multiple parts numbered -5-2, -5-3, 61158
33、5-8 IEC:2007(E) 5 The text of this standard is based on the following documents: FDIS Report on voting 65C/475/FDIS 65C/486/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. This publication has been drafted in ac
34、cordance 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 this date, the publication w
35、ill 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 communication networks Fieldbus speci
36、fications, can be found on the IEC web site. 6 61158-5-8 IEC:2007(E) 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” fieldbus reference model
37、 described in IEC/TR 61158-1. The application service is provided by the application protocol making use of the services available from the data-link or other immediately lower layer. This standard defines the application service characteristics that fieldbus applications and/or system management ma
38、y exploit. 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 application layer service defined in this standard is a conceptual architectural service, indepen
39、dent of administrative and implementation divisions. 61158-5-8 IEC:2007(E) 7 INDUSTRIAL COMMUNICATION NETWORKS FIELDBUS SPECIFICATIONS Part 5-8: Application layer service definition Type 8 elements 1 Scope 1.1 Overview The fieldbus application layer (FAL) provides user programs with a means to acces
40、s the fieldbus communication environment. In this respect, the FAL can be viewed as a “window between corresponding application programs.” This standard provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation envir
41、onment and material specific to Type 8 fieldbus. 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 complete specified actions within the time window ris
42、ks 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 8 fieldbus application layer in terms of a) an abstract model for defining application
43、resources (objects) capable of being manipulated by users via the use of the FAL service, b) the primitive actions and events of the service; c) the parameters associated with each primitive action and event, and the form which they take; and d) the interrelationship between these actions and events
44、 and their valid sequences. The purpose of this standard is to define the services provided to 1) the FAL user at the boundary between the user and the application layer of the fieldbus reference model, and 2) Systems Management at the boundary between the application layer and Systems Management o
45、f the fieldbus reference model. This standard specifies the structure and services of the Type 8 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498) and the OSI application layer structure (ISO/IEC 9545). FAL services and protocols are provided by FAL applica
46、tion-entities (AE) contained within the application processes. The FAL AE is composed of a set of object-oriented application service elements (ASEs) and a layer management entity (LME) that manages the AE. The ASEs provide communication services that operate on a set of related application process
47、object (APO) classes. One of the FAL ASEs is a management ASE that provides a common set of services for the management of the instances of FAL classes. Although these services specify, from the perspective of applications, how request and responses are issued and delivered, they do not include a sp
48、ecification of what the requesting and responding applications are to do with them. That is, the behavioral aspects of the applications are not specified; only a definition of what requests and responses they can send/receive is specified. This permits greater flexibility to the FAL users in standar
49、dizing 8 61158-5-8 IEC:2007(E) such object behavior. In addition to these services, some supporting services are also defined in this standard to provide access to the FAL to control certain aspects of its operation. 1.2 Specifications The principal objective of this standard is to specify the characteristics of conceptual application layer services suitable for time-critical communications, and thus supplement
