EN IEC 61158-4-25:2019

Industrial communication networks - Fieldbus specifications - Part 4-25: Data-link layer protocol specification - Type 25 elements

IEC 61158-4-25:2019 specifies 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, and the communication and interworking of sensors, effectors and other automation devices. By using this document together with other standards positioned within the OSI or fieldbus reference models, otherwise incompatible systems may work together in any combination

Industrielle Kommunikationsnetze - Feldbusse - Teil 4-25: Protokollspezifikation des Data-Link Layer (Sicherungsschicht) - Typ 25-Elemente

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-25: Spécification du protocole de la couche liaison de données - Éléments de type 25

IEC 61158-4-25:2019 La couche de liaison de données assure les communications de messagerie prioritaires de base entre les appareils d’un environnement d’automatisation. Ce protocole offre des opportunités de communication à toutes les entités de liaison de données participantes a) des opportunités de communication cyclique à démarrage synchrone, selon un ordre préétabli, et b) de manière cyclique ou acyclique asynchrone, comme demandé par chaque cycle de chacune de ces entités de liaison de données. Par conséquent, ce protocole peut se caractériser comme assurant un accès cyclique et acyclique asynchrone, mais avec un redémarrage synchrone de chaque cycle.

Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-25. del: Specifikacija protokola na ravni podatkovne povezave - Elementi tipa 25 (IEC 61158-4-25:2019)

Ta dokument določa 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 asinhroni 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: 20-Jun-2019
• Withdrawal Date: 14-May-2022
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.20 - Data link layer
• ICS: 35.110 - Networking
• Technical Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Drafting Committee: IEC/SC 65C - IEC_SC_65C
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 21-Jun-2019
• Completion Date: 21-Jun-2019
• Ref Project: SIST EN IEC 61158-4-25:2019 - Industrial communication networks - Fieldbus specifications - Part 4-25: Data-link layer protocol specification - Type 25 elements (IEC 61158-4-25:2019)

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2019
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-25. del:
Specifikacija protokola na ravni podatkovne povezave - Elementi tipa 25 (IEC
61158-4-25:2019)
Industrial communication networks - Fieldbus specifications - Part 4-25: Data-link layer
protocol specification - Type 25 elements (IEC 61158-4-25:2019)
Industrielle Kommunikationsnetze - Feldbusse - Teil 4-25: Protokollspezifikation des
Data Link Layer (Sicherungsschicht) - Typ 25-Elemente (IEC 61158-4-25:2019)
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-25:
Spécification du protocole de la couche liaison de données - Éléments de type 25 (IEC
61158-4-25:2019)
Ta slovenski standard je istoveten z: EN IEC 61158-4-25:2019
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 61158-4-25

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 25.040.40; 35.100.20; 35.110
English Version
Industrial communication networks - Fieldbus specifications -
Part 4-25: Data-link layer protocol specification - Type 25
elements
(IEC 61158-4-25:2019)
Réseaux de communication industriels - Spécifications des Industrielle Kommunikationsnetze - Feldbusse - Teil 4-25:
bus de terrain - Partie 4-25: Spécification du protocole de la Protokollspezifikation des Data Link Layer
couche liaison de données - Éléments de type 25 (Sicherungsschicht) - Typ 25-Elemente
(IEC 61158-4-25:2019) (IEC 61158-4-25:2019)
This European Standard was approved by CENELEC on 2019-05-15. 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 61158-4-25:2019 E

European foreword
The text of document 65C/946/FDIS, future edition 1 of IEC 61158-4-25, 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-
25:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-02-15
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-05-15
document have to be withdrawn
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 61158-4-25:2019 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61158-1:2019 NOTE Harmonized as EN IEC 61158-1:2019 (not modified)

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
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 10731 -  Information technology - Open Systems - -
Interconnection - Basic Reference Model -
Conventions for the definition of OSI
services
ISO/IEC/IEEE 8802-2017 Standard for Ethernet - -
IEEE Std 802.1D -  IEEE Standard for Local and Metropolitan - -
Area Networks - Media access Control
(MAC) Bridges
IEEE Std 802.1Q -  IEEE Standard for Local and Metropolitan - -
Area Networks - Bridges and Bridged
Networks
IEC 61158-4-25 ®
Edition 1.0 2019-04
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –

Part 4-25: Data-link layer protocol specification – Type 25 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-6780-6

– 2 – IEC 61158-4-25:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
1.1 General . 8
1.2 Specifications . 8
1.3 Procedures . 8
1.4 Applicability . 9
1.5 Conformance . 9
2 Normative references . 9
3 Terms, definitions, symbols, abbreviations and conventions . 9
3.1 Reference model terms and definitions . 10
3.2 Service convention terms and definitions . 11
3.3 Terms and definitions. 11
3.4 Symbols and abbreviations . 13
3.5 Common conventions . 14
3.6 Additional Type 25 conventions . 16
3.6.1 Primitive conventions . 16
3.6.2 State machine conventions . 16
4 Overview of the DL-protocol . 17
4.1 General . 17
4.2 Overview of the medium access control . 17
4.2.1 General . 17
4.2.2 Network topology . 18
4.2.3 Priority control with VLAN . 19
4.2.4 The maximum delivery delay in Type 25 network . 20
4.2.5 Traffic control for real-time communication . 21
4.3 Service assumed from PhL . 21
4.4 DL Layer architecture. 22
4.5 Local parameters and variables . 23
4.5.1 Overview . 23
4.5.2 Variables, parameter, counter and timer . 23
5 General structure and encoding of PhPDUs and DLPDU and related elements of
procedure . 24
5.1 Overview . 24
5.2 Common MAC frame structure, encoding and elements of procedure . 24
5.2.1 MAC frame structure . 24
5.2.2 Elements of the MAC frame . 25
6 DLPDU-specific structure, encoding and elements of procedure . 27
6.1 General . 27
6.2 Structure of the RCL DLPDU . 27
6.2.1 RCL header . 27
7 DLE elements of procedure . 29
7.1 Overview . 29
7.2 RCL communication control (RCLC) . 29
7.2.1 General . 29
7.2.2 Primitive definitions . 29

IEC 61158-4-25:2019 © IEC 2019 – 3 –
7.2.3 RCLC state machine . 32
7.2.4 Function of RCLC . 48
7.3 Real-time communication control (RTC) . 48
7.3.1 General . 48
7.3.2 Primitive definitions . 48
7.3.3 RTC state machine . 50
7.3.4 Function of RTC . 51
7.4 Transmit/Receive control (TRC) . 52
7.4.1 General . 52
7.4.2 Primitive definitions . 52
7.4.3 TRC state machine . 52
7.4.4 Function of TRC . 57
7.5 DLL management protocol (DLM) . 58
7.5.1 Overview . 58
7.5.2 Primitive definitions . 58
7.5.3 DLM state machine (DLM_SM) . 59
Bibliography . 61

Figure 1 – Relationships of DLSAPs, DLSAP-addresses and group DL-a
...