SIST EN 61158-4-14:2012

Industrial communication networks - Fieldbus specifications - Part 4-14: Data-link layer protocol specification - Type 14 elements (IEC 61158-4-14:2010)

2012-03-22 - Publication editing allocated to [e-mail]
Project handled under parallel procedures as FprEN 61158-400 and split into 9 subparts to be published as EN 61158-4-2, 3, 11, 12, 14, 18, 19, 21 and 22 * Supersedes EN 61158-4-14:2008

Industrielle Kommunikationsnetze - Feldbusse - Teil 4-14: Protokollspezifikation des Data Link Layer (Sicherungsschicht) - Typ 14-Elemente (IEC 61158-4-14:2010)

Réseaux de communication industriels - Spécifications de bus de terrain - Partie 4-14: Spécification du protocole de couche de liaison de données - Eléments de Type 14 (CEI 61158-4-14:2010)

Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-14. del: Specifikacija protokola na nivoju podatkovnih povezav - Elementi tipa 14 (IEC 61158-4-14:2010)

Nivo podatkovnih povezav omogoča osnovne časovno kritične sporočilne komunikacije med napravami v avtomatizacijskem okolju. Ta protokol omogoča komunikacijske priložnosti vsem sodelujočim entitetam podatkovnih povezav a) na cikličen način s sinhronim začetkom v skladu z vnaprej določenim razporedom in b) na cikličen ali necikličen asinhron način, kot posamezne entitete podatkovnih povezav zahtevajo v vsakem ciklu. Tako lahko ta protokol opredelimo kot protokol, ki asinhrono omogoča cikličen in acikličen dostop s sinhronim ponovnim zagonom vsakega cikla.

General Information

• Status: Published
• Publication Date: 14-Jun-2012
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.20 - Data link layer
• ICS: 35.110 - Networking
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-May-2012
• Due Date: 03-Aug-2012
• Completion Date: 15-Jun-2012
• Ref Project: EN 61158-4-14:2012 - Industrial communication networks - Fieldbus specifications - Part 4-14: Data-link layer protocol specification - Type 14 elements

Relations

• Replaces: SIST EN 61158-4-14:2008 - Industrial communication networks - Fieldbus specifications -- Part 4-14: Data-link layer protocol specification - Type 14 elements
• Effective Date: 01-Jul-2012
• Replaced By: SIST EN 61158-4-14:2015 - Industrial communication networks - Fieldbus specifications - Part 4-14: Data-link layer protocol specification - Type 14 elements (IEC 61158-4-14:2014)
• Effective Date: 01-Feb-2015

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61158-4-14:2012
01-julij-2012
1DGRPHãþD
SIST EN 61158-4-14:2008
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-14. del:
Specifikacija protokola na nivoju podatkovnih povezav - Elementi tipa 14 (IEC
61158-4-14:2010)
Industrial communication networks - Fieldbus specifications - Part 4-14: Data-link layer
protocol specification - Type 14 elements (IEC 61158-4-14:2010)
Industrielle Kommunikationsnetze - Feldbusse - Teil 4-14: Protokollspezifikation des
Data Link Layer (Sicherungsschicht) - Typ 14-Elemente (IEC 61158-4-14:2010)
Réseaux de communication industriels - Spécifications de bus de terrain - Partie 4-14:
Spécification du protocole de couche de liaison de données - Eléments de Type 14 (CEI
61158-4-14:2010)
Ta slovenski standard je istoveten z: EN 61158-4-14:2012
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.20 Podatkovni povezovalni sloj Data link layer
35.110 Omreževanje Networking
SIST EN 61158-4-14:2012 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61158-4-14:2012

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SIST EN 61158-4-14:2012

EUROPEAN STANDARD
EN 61158-4-14

NORME EUROPÉENNE
May 2012
EUROPÄISCHE NORM

ICS 25.040.40; 35.100.20; 35.110 Supersedes EN 61158-4-14:2008


English version


Industrial communication networks -
Fieldbus specifications -
Part 4-14: Data-link layer protocol specification -
Type 14 elements
(IEC 61158-4-14:2010)


Réseaux de communication industriels -  Industrielle Kommunikationsnetze -
Spécifications de bus de terrain - Feldbusse -
Partie 4-14: Spécification du protocole de Teil 4-14: Protokollspezifikation des Data
couche de liaison de données - Link Layer (Sicherungsschicht) -
Eléments de Type 14 Typ 14-Elemente
(CEI 61158-4-14:2010) (IEC 61158-4-14:2010)





This European Standard was approved by CENELEC on 2012-03-28. 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, 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.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61158-4-14:2012 E

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SIST EN 61158-4-14:2012
EN 61158-4-14:2012 - 2 -

Foreword
The text of document 65C/605/FDIS, future edition 2 of IEC 61158-4-14, 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 61158-4-14:2012.

The following dates are fixed:
(dop) 2012-12-28
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2015-03-28

standards conflicting with the
document have to be withdrawn

This document supersedes EN 61158-4-14:2008.
EN 61158-4-14:2012 includes the following significant technical changes with respect to EN 61158-4-
14:2008:
 Provide stability date for the publication;
 Update the Normative references and Bibliography;
 Corrections of the edit error;
 Specification changes for CPF3;
– update of the requirements for all conformance classes;
– update of the requirements for all conformance services.
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.

Endorsement notice
The text of the International Standard IEC 61158-4-14:2010 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 61158-3-14:2010 NOTE  Harmonized as EN 61158-3-14:2012 (not modified).
IEC 61158-6-14:2010 NOTE  Harmonized as EN 61158-6-14:2012 (not modified).
IEC 61784-2:2010 NOTE  Harmonized as EN 61784-2:2010 (not modified).

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SIST EN 61158-4-14:2012
- 3 - EN 61158-4-14:2012

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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC/TR 61158-1 2010 Industrial communication networks - Fieldbus CLC/TR 61158-1 2010
specifications -
Part 1: Overview and guidance for the
IEC 61158 and IEC 61784 series


IEC 61158-5-14 2010 Industrial communication networks - Fieldbus EN 61158-5-14 2012
specifications -
Part 5-14: Application layer service definition -
Type 14 elements


ISO/IEC 7498-1 - Information technology - Open Systems - -
Interconnection - Basic Reference Model: The
Basic Model


ISO/IEC 7498-3 - Information technology - Open Systems - -
Interconnection - Basic Reference Model:
Naming and addressing


ISO/IEC 8802-3 - Information technology - Telecommunications - -
and information exchange between systems -
Local and metropolitan area networks -
Specific requirements -
Part 3: Carrier sense multiple access with
collision detection (CSMA/CD) access method
and physical layer specifications


ISO/IEC 10731 - Information technology - Open Systems - -
Interconnection - Basic reference model -
Conventions for the definition of OSI services


IETF RFC 791 - Internet Protocol - DARPA Internet Program - -
Protocol Specification


IETF RFC 768 - User Datagram Protocol - -

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SIST EN 61158-4-14:2012

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SIST EN 61158-4-14:2012
IEC 61158-4-14
®
Edition 2.0 2010-08
INTERNATIONAL
STANDARD


Industrial communication networks – Fieldbus specifications –
Part 4-14: Data-link layer protocol specification – Type 14 elements


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
V
ICS 25.04.40; 35.100.20; 35.110 ISBN 978-2-88912-088-8
® Registered trademark of the International Electrotechnical Commission

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SIST EN 61158-4-14:2012
– 2 – 61158-4-14 © IEC:2010(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
1.1 General .7
1.2 Specifications.7
1.3 Procedures.7
1.4 Applicability.8
1.5 Conformance.8
2 Normative references .8
3 Terms, definitions, symbols and abbreviations.8
3.1 Reference model terms and definitions.9
3.2 Service convention terms and definitions.11
3.3 ISO/IEC 8802-3 terms .11
3.4 Common terms and definitions .12
3.5 Symbols and abbreviations.15
4 Overview of the DL-protocol .16
4.1 General .16
4.2 Services provided by the DL.17
4.3 Structure of deterministic communication scheduling.18
5 Procedure of deterministic communication scheduling .19
5.1 Overview .19
5.2 State transitions .20
5.3 State table.22
5.4 Function descriptions .23
6 Structure and encoding of ECSME PDU .27
6.1 ECSME PDU structure .27
6.2 Encoding of ECSME packet.29
Bibliography.32

Figure 1 – Relationships of DLSAPs, DLSAP-addresses and group DL-addresses .13
Figure 2 – Communication model.16
Figure 3 – Type 14 packet identifier .18
Figure 4 – Time-sharing communication scheduling .18
Figure 5 – State transitions of ECSME.20
Figure 6 – Format of NonPeriodicDataAnnunciation PDU.27
Figure 7 – Format of EndofNonPeriodicDataSending PDU .28
Figure 8 – Format of Type 14 PDU.28
Figure 9 – Format of Type 14 PDU for FRT application .28

Table 1 – ECSME state transitions.22
Table 2 – NonperiodicDataSendingSuc() description.23
Table 3 – NonperiodicDataAnnunciation() description .23
Table 4 – NonperiodicDataSending() description .23
Table 5 – NonperiodicDataSendingSuc() description.24

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SIST EN 61158-4-14:2012
61158-4-14 © IEC:2010(E) – 3 –
Table 6 – FirstNonperiodicDataSending() description.24
Table 7 – NonperiodicDataPriority() description .24
Table 8 – NonperiodicDataTimeEnough() description.25
Table 9 – NonperiodicDataSending() description .25
Table 10 – EndOfNonperiodicDataSending() description.25
Table 11 – IsDeviceConfigured() description.26
Table 12 – CountOffsetTime() description.26
Table 13 – DataSendingTiming() description.26
Table 14 – RecEndofNonPeriodicDataSending() description .26
Table 15 – NonPeriodicDataAnnunciation message encoding .29
Table 16 – EndofNonPeriodicDataSending message encoding.30
Table 17 – Type 14 DL-management Tag encoding .30
Table 18 – Type 14 message encoding .31
Table 19 – Type 14 message for FRT application encoding .31

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SIST EN 61158-4-14:2012
– 4 – 61158-4-14 © IEC:2010(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –

Part 4-14: Data-link layer protocol specification –
Type 14 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.
International Standard IEC 61158-4-14 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This second edition cancels and replaces the first edition published in 2007. This edition
constitutes a technical revision.
The main changes with respect to the previous edition are listed below:
• Provide stability date for the publication;
• Update the Normative references and Bibliography;
• Corrections the edit error;
• specification changes for CPF3;
– update of the requirements for all conformance classes;
– update of the requirements for all conformance services.

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SIST EN 61158-4-14:2012
61158-4-14 © IEC:2010(E) – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
65C/605/FDIS 65C/619/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 the 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.
NOTE The revision of this standard will be synchronized with the other parts of the IEC 61158 series.

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SIST EN 61158-4-14:2012
– 6 – 61158-4-14 © IEC:2010(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 described in IEC 61158-1.
The data-link protocol provides the data-link service by making use of the services available
from the physical 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 data-link
entities (DLEs) 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:
a) as a guide for implementors and designers;
b) for use in the testing and procurement of equipment;
c) as part of an agreement for the admittance of systems into the open systems environment;
d) 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.
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-property-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 profile parts. Use of the various protocol types in other combinations may
require permission from their respective intellectual-property-right holders.
The International Electrotechnical Commission (IEC) draws attention to the fact that it is
claimed that compliance with this document may involve the use of a patent concerning Type
14 elements and possibly other types given in subclause 5 as f o l l o w s :
CN200410088676.7 [SP] Scheduling method with deterministic communication based on
Ethernet
IEC takes no position concerning the evidence, validity and scope of these patent rights.
The holder of this patent right has assured the IEC that he/she is willing to negotiate licences
either free of charge or under reasonable and non-discriminatory terms and conditions with
applicants throughout the world. In this respect, the statement of the holder of this patent right
is registered with IEC. Information may be obtained from:
[SP] Zhejiang SUPCON Technology Co., Ltd.
Dongqin FENG
Liuhe Road 309, Bingjiang District,
Hangzhou, 310053
China
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights other than those identified above. IEC shall not be held responsible for
identifying any or all such patent rights.
ISO (www.iso.org/patents) and IEC (http://www.iec.ch/tctools/patent_decl.htm) maintain on-
line data bases of patents relevant to their standards. Users are encouraged to consult the
data bases for the most up to date information concerning patents.

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SIST EN 61158-4-14:2012
61158-4-14 © IEC:2010(E) – 7 –
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –

Part 4-14: Data-link layer protocol specification –
Type 14 elements



1 Scope
1.1 General
The data-link layer provides basic time-critical messaging communications between devices in
an automation environment.
This protocol provides communication opportunities to all participating data-link entities
a) in a synchronously-starting cyclic manner, according to a pre-established schedule, and
b) in a cyclic or acyclic asynchronous manner, as requested each cycle by each of those
data-link entities.
Thus this protocol can be characterized as one which provides cyclic and acyclic access
asynchronously but with a synchronous restart of each cycle.
1.2 Specifications
This standard specifies
a) procedures for the timely transfer of data and control information from one data-link user
entity to a peer user entity, and among the data-link entities forming the distributed data-
link service provider;
b) procedures for giving communications opportunities to all participating DL-entities,
sequentially and in a cyclic manner for deterministic and synchronized transfer at cyclic
intervals;
c) procedures for giving communication opportunities available for time-critical data
transmission together with non-time-critical data transmission without prejudice to the
time-critical data transmission;
d) procedures for giving cyclic and acyclic communication opportunities for time-critical data
transmission with prioritized access;
e) procedures for giving communication opportunities based on standard ISO/ IEC 8802-3
medium access control, with provisions for nodes to be added or removed during normal
operation;
f) the structure of the fieldbus DLPDUs used for the transfer of data and control information
by the protocol of this standard, and their representation as physical interface data units.
1.3 Procedures
The procedures are defined in terms of
a) the interactions between peer DL-entities (DLEs) through the exchange of fieldbus
DLPDUs;
b) the interactions between a DL-service (DLS) provider and a DLS-user in the same system
through the exchange of DLS primitives;
c) the interactions between a DLS-provider and a Ph-service provider in the same system
through the exchange of Ph-service primitives.

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SIST EN 61158-4-14:2012
– 8 – 61158-4-14 © IEC:2010(E)
1.4 Applicability
These procedures are applicable to instances of communication between systems which
support time-critical communications services within the data-link layer of the OSI or fieldbus
reference models, and which require the ability to interconnect in an open systems
interconnection environment.
Profiles provide a simple multi-attribute means of summarizing an implementation’s
capabilities, and thus its applicability to various time-critical communications needs.
1.5 Conformance
This standard also specifies conformance requirements for systems implementing these
procedures. This standard does not contain tests to demonstrate compliance with such
requirements.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
1
IEC/TR 61158-1:2010 , Industrial communication networks – Fieldbus specifications – Part 1:
Overview and guidance for the IEC 61158 and IEC 61784 series
1
IEC 61158-5-14:2010 , Industrial communication networks – Fieldbus specifications – Part 5-
14: Application layer service definition – Type 14 elements
ISO/IEC 7498-1, Information technology – Open Systems Interconnection – Basic Reference
Model: The Basic Model
ISO/IEC 7498-3, Information technology – Open Systems Interconnection – Basic Reference
Model: Naming and addressing
ISO/IEC 8802-3, Information technology – Telecommunications and information exchange
between systems – Local and metropolitan area networks – Specific requirements – Part 3:
Carrier sense multiple access with collision detection (CSMA/CD) access method and
physical layer specifications
ISO/IEC 10731, Information technology – Open Systems Interconnection – Basic Reference
Model – Conventions for the definition of OSI services
IETF RFC 768, User Datagram Protocol (UDP), available at
IETF RFC 791, Internet protocol, available at
3 Terms, definitions, symbols and abbreviations
For the purposes of this document, the following terms, definitions, symbols and abbreviations
apply.
___________
1
 To be published

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SIST EN 61158-4-14:2012
61158-4-14 © IEC:2010(E) – 9 –
3.1 Reference model terms and definitions
This standard is based in part on the concepts developed in ISO/IEC 7498-1 and ISO/IEC
7498-3, and makes use of the following terms defined therein.
3.1.1 called-DL-address [ISO/IEC 7498-3]
3.1.2 calling-DL-address [ISO/IEC 7498-3]
3.1.3 centralized multi-end-point-connection [ISO/IEC 7498-1]
3.1.4 correspondent (N)-entities [ISO/IEC 7498-1]
correspondent DL-entities  (N=2)
correspondent Ph-entities  (N=1)
3.1.5 demultiplexing [ISO/IEC 7498-1]
3.1.6 DL-address [ISO/IEC 7498-3]
3.1.7 DL-address-mapping [ISO/IEC 7498-1]
3.1.8 DL-connection [ISO/IEC 7498-1]
3.1.9 DL-connection-end-point [ISO/IEC 7498-1]
3.1.10 DL-connection-end-point-identifier [ISO/IEC 7498-1]
3.1.11 DL-connection-mode transmission [ISO/IEC 7498-1]
3.1.12 DL-connectionless-mode transmission [ISO/IEC 7498-1]
3.1.13 DL-data-sink [ISO/IEC 7498-1]
3.1.14 DL-data-source [ISO/IEC 7498-1]
3.1.15 DL-duplex-transmission [ISO/IEC 7498-1]
3.1.16 DL-facility [ISO/IEC 7498-1]
3.1.17 DL-local-view [ISO/IEC 7498-3]
3.1.18 DL-name [ISO/IEC 7498-3]
3.1.19 DL-protocol [ISO/IEC 7498-1]
3.1.20 DL-protocol-connection-identifier [ISO/IEC 7498-1]
3.1.21 DL-protocol-control-information [ISO/IEC 7498-1]
3.1.22 DL-protocol-data-unit [ISO/IEC 7498-1]
3.1.23 DL-protocol-version-identifier [ISO/IEC 7498-1]
3.1.24 DL-relay [ISO/IEC 7498-1]
3.1.25 DL-service-connection-identifier [ISO/IEC 7498-1]
3.1.26 DL-service-data-unit [ISO/IEC 7498-1]
3.1.27 DL-simplex-transmission [ISO/IEC 7498-1]
3.1.28 DL-subsystem [ISO/IEC 7498-1]
3.1.29 DL-user-data [ISO/IEC 7498-1]

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SIST EN 61158-4-14:2012
– 10 – 61158-4-14 © IEC:2010(E)
3.1.30 flow control [ISO/IEC 7498-1]
3.1.31 layer-management [ISO/IEC
...