EN IEC 61158-4-12:2019

SLOVENSKI STANDARD
01-november-2019
Nadomešča:
SIST EN 61158-4-12:2015
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-12. del:
Specifikacija protokola na ravni podatkovnih povezav - Elementi tipa 12 (IEC 61158
-4-12:2019)
Industrial communication networks - Fieldbus specifications - Part 4-12: Data-link layer
protocol specification - Type 12 elements (IEC 61158-4-12:2019)
Industrielle Kommunikationsnetze - Feldbusse - Teil 4-12: Protokollspezifikation des
Data Link Layer (Sicherungsschicht) - Typ 12-Elemente (IEC 61158-4-12:2019)
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-12:
Spécification du protocole de la couche liaison de données - Éléments de type 12 (IEC
61158-4-12:2019)
Ta slovenski standard je istoveten z: EN IEC 61158-4-12:2019
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61158-4-12

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
Supersedes EN 61158-4-12:2014
ICS 25.040.40; 35.100.20; 35.110
English Version
Industrial communication networks - Fieldbus specifications -
Part 4-12: Data-link layer protocol specification - Type 12
elements
(IEC 61158-4-12:2019)
Réseaux de communication industriels - Spécifications des Industrielle Kommunikationsnetze - Feldbusse - Teil 4-12:
bus de terrain - Partie 4-12: Spécification du protocole de la Protokollspezifikation des Data Link Layer
couche liaison de données - Éléments de type 12 (Sicherungsschicht) - Typ 12-Elemente
(IEC 61158-4-12:2019) (IEC 61158-4-12:2019)
This European Standard was approved by CENELEC on 2019-05-23. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61158-4-12:2019 E

European foreword
The text of document 65C/946/FDIS, future edition 4 of IEC 61158-4-12, 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 IEC 61158-4-
12:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-02-23
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-05-23
document have to be withdrawn
This document supersedes EN 61158-4-12:2014.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61158-4-12:2019 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 61131-2 NOTE Harmonized as EN 61131-2
IEC 61131-3 NOTE Harmonized as EN 61131-3
IEC 61158-1 NOTE Harmonized as EN 61158-1
IEC 61158-2:2014 NOTE Harmonized as EN 61158-2:2014 (not modified)
IEC 61158-5-12:2019 NOTE Harmonized as EN IEC 61158-5-12:2019 (not modified)
IEC 61158-6-12 NOTE Harmonized as EN 61158-6-12
IEC 61784-1 NOTE Harmonized as EN 61784-1
IEC 61784-2 NOTE Harmonized as EN 61784-2

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1  Where 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 61158-3-12 2019 Industrial communication networks - EN IEC 61158-3-12 2019
Fieldbus specifications - Part 3-12: Data-
link layer service definition - Type 12
elements
IEC 61588 -  Precision clock synchronization protocol for - -
networked measurement and control
systems
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 9899 -  Information technology - Programming - -
languages - C
ISO/IEC 10731 -  Information technology - Open Systems - -
Interconnection - Basic Reference Model -
Conventions for the definition of OSI
services
ISO/IEC/IEEE 8802--  Standard for Ethernet - -
IEEE Std 802.1Q -  IEEE Standard for Local and Metropolitan - -
Area Networks – Bridges and bridged
networks
IETF RFC 768 -  User Datagram Protocol - -
IETF RFC 791 -  Internet protocol DARPA internet program - -
protocol specification
IEC 61158-4-12 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Fieldbus specifications –

Part 4-12: Data-link layer protocol specification – Type 12 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-6775-2

– 2 – IEC 61158-4-12:2019 © IEC 2019
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
1.1 General . 11
1.2 Specifications . 11
1.3 Procedures . 11
1.4 Applicability . 11
1.5 Conformance . 11
2 Normative references . 12
3 Terms, definitions, symbols, abbreviations and conventions . 12
3.1 Reference model terms and definitions . 12
3.2 Service convention terms and definitions . 13
3.3 Common terms and definitions . 14
3.4 Additional Type 12 definitions . 14
3.5 Common symbols and abbreviations . 17
3.6 Additional Type 12 symbols and abbreviations . 18
3.7 Conventions . 19
3.7.1 General concept . 19
3.7.2 Abstract syntax conventions . 19
3.7.3 Convention for the encoding of reserved bits and octets . 21
3.7.4 Conventions for the common coding s of specific field octets . 21
3.7.5 State machine conventions . 22
4 Overview of the DL-protocol . 24
4.1 Operating principle. 24
4.2 Topology . 24
4.3 Frame processing principles . 24
4.4 Data-link layer overview . 25
4.5 Error detection overview . 26
4.6 Node reference model . 26
4.6.1 Mapping onto OSI basic reference model . 26
4.6.2 Data-link Layer features . 27
4.7 Operation overview . 27
4.7.1 Relation to ISO/IEC/IEEE 8802-3 . 27
4.7.2 Frame structure . 27
5 Frame structure . 28
5.1 Frame coding principles . 28
5.2 Data types and encoding rules . 28
5.2.1 General description of data types and encoding rules . 28
5.2.2 Transfer syntax for bit sequences . 28
5.2.3 Unsigned Integer . 29
5.2.4 Signed Integer . 30
5.2.5 Octet String . 30
5.2.6 Visible String . 30
5.3 Ethernet DLPDU structure . 31
5.3.1 Type 12 frame inside an Ethernet frame . 31
5.3.2 Type 12 frame inside a UDP datagram . 31

IEC 61158-4-12:2019 © IEC 2019 – 3 –
5.3.3 Type 12 frame structure . 33
5.4 Type 12 DLPDU structure . 33
5.4.1 Read . 33
5.4.2 Write . 38
5.4.3 Read write . 43
5.4.4 Attributes access . 50
5.5 Network variable structure . 50
5.6 Type 12 mailbox structure . 51
6 Attributes . 52
6.1 Management . 52
6.1.1 DL Information .
...