SIST EN 61158-6-19:2015
(Main)Industrial communication networks - Fieldbus specifications - Part 6-19: Application layer protocol specification - Type 19 elements (IEC 61158-6-19:2014 )
Industrial communication networks - Fieldbus specifications - Part 6-19: Application layer protocol specification - Type 19 elements (IEC 61158-6-19:2014 )
IEC 61158-6-19:2014 defines the protocol provided to define the FAL user at the boundary between the user and the Application Layer of the Fieldbus Reference Model, and Systems Management at the boundary between the Application Layer and Systems Management of the Fieldbus Reference Model. This standard specifies the structure and services of the IEC fieldbus Application Layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498) and the OSI Application Layer Structure (ISO/IEC 9545). This third edition cancels and replaces the second edition published in 2010 and constitutes a technical revision. The main changes are:
- introducing connections based on a producer-consumer model;
- introducing additional mechanisms to realize features such as timestamping and oversampling;
- improving the hotplug and redundancy features;
- improving the phase switching and the error handling;
- editorial improvements.
Industrielle Kommunikationsnetze - Feldbusse - Teil 6-19: Protokollspezifikation des Application Layer (Anwendungsschicht) - Typ 19-Elemente (IEC 61158-6-19:2014 )
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-19: Spécification du protocole de la couche application - Eléments de type 19 (CEI 61158-6-19:2014 )
L'IEC 61158-6-19:2014 décrit le protocole mis en place pour la présente norme vise à définir les services mis en place pour l'utilisateur de la couche FAL, à la frontière entre l'utilisateur et la couche Application du modèle de référence de bus de terrain, et la gestion des systèmes, à la frontière entre la couche Application et la gestion des systèmes du modèle de référence de bus de terrain. La présente norme spécifie la structure et les services de la couche Application de bus de terrain de la CEI, en conformité avec le modèle de référence de base OSI (ISO/CEI 7498) et la structure de la couche Application OSI (ISO/CEI 9545). Cette troisième édition annule et remplace la deuxième édition parue en 2010. Elle constitue une révision technique. Les principales modifications sont:
- introduction des connexions basées sur un modèle producteur-consommateur;
- introduction des mécanismes complémentaires pour la mise en oeuvre de fonctions telles que l'horodatage et le sur-échantillonnage;
- amélioration des caractéristiques de connexion à chaud et de redondance;
- amélioration de la commutation des phases et de la gestion des erreurs;
- améliorations rédactionnelles.
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-19. del: Specifikacija protokola na aplikacijski ravni - Elementi tipa 19 (IEC 61158-6-19:2014 )
IEC 61158-6-19:2014 določa protokol, ki zagotavlja opredelitev uporabnika FAL na meji med uporabnikom in aplikacijskim nivojem referenčnega modela procesnega vmesnika in upravljanjem sistemov na meji med aplikacijskim nivojem in upravljanjem sistemov referenčnega modela procesnega vodila. Ta standard določa strukturo in opravila aplikacijskega nivoja procesnih vodil IEC v skladu z osnovnim referenčnim modelom OSI (ISO/IEC 7498) in strukturo aplikacijskega nivoja OSI (ISO/IEC 9545). Ta tretja izdaja razveljavlja in nadomešča drugo izdajo, objavljeno leta 2010, in predstavlja tehnično popravljeno izdajo. Glavne spremembe so:
– uvedba povezav na osnovi modela proizvajalec-potrošnik;
– uvedba dodatnih mehanizmov za uresničevanje funkcij, kot sta časovni žig in nadvzorčenje;
– izboljšanje funkcij »hotplug« (priključitev me delovanjem) in funkcije redundance;
– izboljšanje preklapljanja faz in obravnavanja napak;
– redakcijske izboljšave.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61158-6-19:2015
01-marec-2015
1DGRPHãþD
SIST EN 61158-6-19:2012
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-19. del:
Specifikacija protokola na aplikacijski ravni - Elementi tipa 19 (IEC 61158-6-
19:2014 )
Industrial communication networks - Fieldbus specifications - Part 6-19: Application layer
protocol specification - Type 19 elements (IEC 61158-6-19:2014 )
Industrielle Kommunikationsnetze - Feldbusse - Teil 6-19: Protokollspezifikation des
Application Layer (Anwendungsschicht) - Typ 19-Elemente (IEC 61158-6-19:2014 )
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-19:
Spécification du protocole de la couche application - Eléments de type 19 (CEI 61158-6-
19:2014 )
Ta slovenski standard je istoveten z: EN 61158-6-19:2014
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.70 Uporabniški sloj Application layer
35.110 Omreževanje Networking
SIST EN 61158-6-19:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 61158-6-19:2015
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SIST EN 61158-6-19:2015
EUROPEAN STANDARD EN 61158-6-19
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2014
ICS 25.040.40; 35.100.70; 35.110 Supersedes EN 61158-6-19:2012
English Version
Industrial communication networks - Fieldbus specifications -
Part 6-19: Application layer protocol specification - Type 19
elements
(IEC 61158-6-19:2014)
Réseaux de communication industriels - Spécifications des Industrielle Kommunikationsnetze - Feldbusse - Teil 6-19:
bus de terrain - Partie 6-19: Spécification du protocole de la Protokollspezifikation des Application Layer
couche application - Eléments de type 19 (Anwendungsschicht) - Typ 19-Elemente
(CEI 61158-6-19:2014) (IEC 61158-6-19:2014)
This European Standard was approved by CENELEC on 2014-09-23. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for 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 CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61158-6-19:2014 E
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SIST EN 61158-6-19:2015
EN 61158-6-19:2014 - 2 -
Foreword
The text of document 65C/764/FDIS, future edition 3 of IEC 61158-6-19, prepared by SC 65C
"Industrial networks" of IEC/TC 65 "Industrial-process measurement, control and automation" was
submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61158-6-19:2014.
The following dates are fixed:
(dop) 2015-06-23
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2017-09-23
• latest date by which the national standards conflicting with
the document have to be withdrawn
This document supersedes EN 61158-6-19:2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association.
Endorsement notice
The text of the International Standard IEC 61158-6-19:2014 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61131 NOTE Harmonized in EN 61131 series.
IEC 61158-1 NOTE Harmonized as EN 61158-1.
IEC 61158-4-16 NOTE Harmonized as EN 61158-4-16.
IEC 61784-1 NOTE Harmonized as EN 61784-1.
IEC 61784-2 NOTE Harmonized as EN 61784-2.
IEC 61800 NOTE Harmonized in EN 61800 series.
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Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61158-3-19 - Industrial communication networks - EN 61158-3-19 -
Fieldbus specifications -
Part 3-19: Data-link layer service
definition - Type 19 elements
IEC 61158-4-19 - Industrial communication networks - EN 61158-4-19 -
Fieldbus specifications -
Part 4-19: Data-link layer protocol
specification - Type 19 elements
IEC 61158-5-19 - Industrial communication networks - EN 61158-5-19 -
Fieldbus specifications -
Part 5-19: Application layer service
definition - Type 19 elements
ISO/IEC 7498-1 - Information technology - Open Systems - -
Interconnection - Basic reference model:
The basic model
ISO/IEC 8822 - Information technology - Open Systems - -
Interconnection - Presentation service
definition
ISO/IEC 8824-1 - Information technology - Abstract Syntax - -
Notation One (ASN.1): Specification of
basic notation
ISO/IEC 9545 - Information technology - Open Systems - -
Interconnection - Application layer structure
ISO/IEC 10731 - Information technology - Open Systems - -
Interconnection - Basic Reference Model -
Conventions for the definition of OSI
services
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SIST EN 61158-6-19:2015
IEC 61158-6-19
®
Edition 3.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 6-19: Application layer protocol specification – Type 19 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 6-19: Spécification du protocole de la couche application – Eléments
de type 19
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-1765-8
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 agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 61158-6-19:2015
– 2 – IEC 61158-6-19:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
1.1 General . 7
1.2 Specifications . 8
1.3 Conformance . 8
2 Normative references . 8
3 Terms, definitions, abbreviations, symbols and conventions . 9
3.1 Referenced terms and definitions . 9
3.2 Additional terms and definitions . 10
3.3 Additional abbreviations and symbols . 11
3.4 Conventions . 11
4 Abstract syntax . 12
5 Transfer syntax . 12
5.1 Introduction . 12
5.2 RTC PDU merged abstract and transfer syntax . 12
6 Structure of FAL protocol state machines . 12
7 AP-context state machine . 14
7.1 Overview . 14
7.2 States . 14
7.3 States, events and transitions . 14
8 FAL service protocol machine (FSPM) . 15
8.1 Overview . 15
8.2 MGT services . 15
8.3 IDN services . 16
8.4 CYCIDN services . 16
9 Application relationship protocol machine (ARPM) . 17
9.1 Overview . 17
9.2 Master ARPM . 17
9.3 Slave ARPM . 18
9.4 Primitives received from the FSPM . 19
9.5 Indications received from the DMPM . 21
10 DLL mapping protocol machine (DMPM) . 22
10.1 Overview . 22
10.2 Primitives received from the ARPM . 22
10.3 Indications received from the DL . 22
Bibliography . 23
Figure 1 – Relationships among protocol machines and adjacent layers . 13
Figure 2 – APCSM state diagram . 14
Figure 3 – ARPM master AR state diagram . 17
Figure 4 – ARPM slave AR state diagram . 18
Table 1 – RTC PDU attribute format . 12
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IEC 61158-6-19:2014 © IEC 2014 – 3 –
Table 2 – APCSM state-event table . 15
Table 3 – Master ARPM state-event table . 18
Table 4 – Slave ARPM state-event table . 19
Table 5 – ARPM to DL mapping . 22
Table 6 – DL to ARPM mapping . 22
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 6-19: Application layer protocol specification –
Type 19 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-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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 and
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 Publication 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 Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
Attention is drawn to the fact that the use of the associated protocol type is restricted by its
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 layer protocol type to
be used with other layer protocols of the same type, or in other type combinations explicitly
authorized by its intellectual-property-right holders.
NOTE Combinations of protocol types are specified in IEC 61784-1 and IEC 61784-2.
International Standard IEC 61158-6-19 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This third edition cancels and replaces the second edition published in 2010. This edition
constitutes a technical revision. The main changes with respect to the previous edition are
listed below:
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SIST EN 61158-6-19:2015
IEC 61158-6-19:2014 © IEC 2014 – 5 –
• introducing connections based on a producer-consumer model;
• introducing additional mechanisms to realize features such as timestamping and
oversampling;
• improving the hotplug and redundancy features;
• improving the phase switching and the error handling;
• editorial improvements.
The text of this standard is based on the following documents:
FDIS Report on voting
65C/764/FDIS 65C/774/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 accordance with ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61158 series, published under the general title Industrial
communication networks – Fieldbus specifications, can be found on the IEC web site.
The committee has decided that the contents of this publication will remain unchanged until
the stability 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 will be:
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
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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 described in IEC 61158-1.
The application protocol provides the application service by making use of the services
available from the data-link or other immediately lower layer. The primary aim of this standard
is to provide a set of rules for communication expressed in terms of the procedures to be
carried out by peer application entities (AEs) at the time of communication. These rules for
communication are intended to provide a sound basis for development in order to serve a
variety of purposes:
• as a guide for implementors and designers;
• for use in the testing and procurement of equipment;
• as part of an agreement for the admittance of systems into the open systems environment;
• as a refinement to the understanding of time-critical communications within OSI.
This standard is concerned, in particular, with the communication and interworking of sensors,
effectors and other automation devices. By using this standard together with other standards
positioned within the OSI or fieldbus reference models, otherwise incompatible systems may
work together in any combination.
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IEC 61158-6-19:2014 © IEC 2014 – 7 –
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 6-19: Application layer protocol specification –
Type 19 elements
1 Scope
1.1 General
The Fieldbus Application Layer (FAL) provides user programs with a means to access 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 environment and
material specific to Type 19 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 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
different Types of fieldbus Application Layer in terms of
a) an abstract model for defining application 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, and their valid sequences.
The purpose of this standard is to define the services provided to
a) the FAL user at the boundary between the user and the Application Layer of the Fieldbus
Reference Model, and
b) Systems Management at the boundary between the Application Layer and Systems
Management of the Fieldbus Reference Model.
This standard specifies the structure and services of the IEC 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 application-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
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 specification 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
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send/receive is specified. This permits greater flexibility to the FAL users in standardizing
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 the
OSI Basic Reference Model in guiding the development of application layer protocols for time-
critical communications.
A secondary objective is to provide migration paths from previously-existing industrial
communications protocols. It is this latter objective which gives rise to the diversity of services
standardized as the various Types of IEC 61158, and the corresponding protocols
standardized in subparts of IEC 61158-6.
1.3 Conformance
This standard does not specify individual implementations or products, nor do they constrain
the implementations of application layer entities within industrial automation systems.
There is no conformance of equipment to this application layer service definition standard.
Instead, conformance is achieved through implementation of conforming application layer
protocols that fulfill any given Type of application layer services as defined in this standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
NOTE All parts of the IEC 61158 series, as well as IEC 61784-1 and IEC 61784-2 are maintained simultaneously.
Cross-references to these documents within the text therefore refer to the editions as dated in this list of normative
references.
IEC 61158-3-19, Industrial communication networks – Fieldbus specifications – Part 3-19:
Data-link layer service definition – Type 19 elements
IEC 61158-4-19, Industrial communication networks – Fieldbus specifications – Part 4-19:
Data-link layer protocol specification – Type 19 elements
IEC 61158-5-19, Industrial communication networks – Fieldbus specifications – Part 5-19:
Application layer service definition – Type 19 elements
ISO/IEC 7498-1, Information technology – Open Systems Interconnection – Basic Reference
Model: The Basic Model
ISO/IEC 8822, Information technology – Open Systems Interconnection – Presentation
service definition
ISO/IEC 8824-1, Information technology – Abstract Syntax Notation One (ASN.1):
Specification of basic notation
ISO/IEC 9545, Information technology – Open Systems Interconnection – Application Layer
structure
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IEC 61158-6-19:2014 © IEC 2014 – 9 –
ISO/IEC 10731, Information technology – Open Systems Interconnection – Basic Reference
Model – Conventions for the definition of OSI services
3 Terms, definitions, abbreviations, symbols and conventions
For the purposes of this document, the following terms, definitions, symbols, abbreviations
and conventions apply.
3.1 Referenced terms and definitions
3.1.1 ISO/IEC 7498-1 terms
For the purposes of this document, the following terms as defined in ISO/IEC 7498-1 apply:
a) application entity
b) application process
c) application protocol data unit
d) application service element
e) application entity invocation
f) application process invocation
g) application transaction
h) real open system
i) transfer syntax
3.1.2 ISO/IEC 8822 terms
For the purposes of this document, the following terms as defined in ISO/IEC 8822 apply:
a) abstract syntax
b) presentation context
3.1.3 ISO/IEC 9545 terms
For the purposes of this document, the following terms as defined in ISO/IEC 9545 apply:
a) application-association
b) application-context
c) application context name
d) application-entity-invocation
e) application-entity-type
f) application-process-invocation
g) application-process-type
h) application-service-element
i) application control service element
3.1.4 ISO/IEC 8824-1 terms
For the purposes of this document, the following terms as defined in ISO/IEC 8824-1 apply:
a) object identifier
b) type
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3.1.5 Fieldbus Data Link Layer terms
For the purposes of this document, the following terms as defined in IEC 61158-3-19 and
IEC 61158-4-19 apply.
a) DL-Time
b) DL-Scheduling-policy
c) DLCEP
d) DLC
e) DL-connection-oriented mode
f) DLPDU
g) DLSDU
h) DLSAP
i) fixed tag
j) generic tag
k) link
l) MAC ID
m) network address
n) node address
o) node
p) tag
q) scheduled
r) unscheduled
3.2 Additional terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.2.1
communication cycle
fixed time period between two master synchronization telegrams in which real-time telegrams
are transmitted in the RT cha
...
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