SIST EN 61158-4-7:2008

Industrial communication networks - Fieldbus specifications -- Part 4-7: Data-link layer protocol specification - Type 7 elements

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.

Industrielle Kommunikationsnetze - Feldbusse - Teil 4-7: Protokollspezifikation des Data Link Layer (Sicherungsschicht) - Typ 7-Elemente

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-7: Spécification des protocoles des couches de liaison de données - Eléments de type 7

La CEI 61158-4-7:2007 décrit la couche de liaison de données assure les communications de messagerie de base en temps critique entre des dispositifs dans un environnement d'automation. Elle spécifie les procédures de transfert opportun des données et des informations de commande entre une entité utilisateur de liaison de données et une entité utilisateur homologue, mais aussi parmi les entités de liaison de données formant le fournisseur de service de liaison de données distribué. Cette première édition et ses parties associées de la sous-série CEI 61158-4 annulent et remplacent la CEI 61158-4:2003. Elle comporte les modifications suivantes:
- suppression du précédent bus de terrain Type 6 et du "placeholder" (réceptacle) pour une couche de liaison de données de bus de terrain  Type 5, en raison du manque de pertinence commerciale;
- ajout de nouveaux types de bus de terrain;
- division de la présente partie en plusieurs parties numérotées -4 1, -4 2,..., -4-19. La présente version bilingue (2013-09) correspond à la version anglaise monolingue publiée en 2007-12.

Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-7. del: Specifikacija protokola na nivoju podatkovnih povezav - Elementi tipa 7 (IEC 61158-4-7:2007)

General Information

• Status: Published
• Publication Date: 13-Apr-2008
• 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: 14-Mar-2008
• Due Date: 19-May-2008
• Completion Date: 14-Apr-2008
• Ref Project: EN 61158-4-7:2008 - Industrial communication networks - Fieldbus specifications - Part 4-7: Data-link layer protocol specification - Type 7 elements

Relations

• Replaces: SIST EN 61158-4:2004 - Digital data communication for measurement and control - Fieldbus for use in industrial control systems -- Part 4: Data link protocol specification
• Effective Date: 29-Jan-2023
• Revised: SIST EN 61158-4:2004 - Digital data communication for measurement and control - Fieldbus for use in industrial control systems -- Part 4: Data link protocol specification
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61158-4-7:2008
01-junij-2008
1DGRPHãþD
SIST EN 61158-4:2004
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-7. del:
Specifikacija protokola na nivoju podatkovnih povezav - Elementi tipa 7 (IEC 61158
-4-7:2007)
Industrial communication networks - Fieldbus specifications -- Part 4-7: Data-link layer
protocol specification - Type 7 elements
Industrielle Kommunikationsnetze - Feldbusse - Teil 4-7: Protokollspezifikation des Data
Link Layer (Sicherungsschicht) - Typ 7-Elemente
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-7:
Spécification des protocoles des couches de liaison de données - Eléments de type 7
Ta slovenski standard je istoveten z: EN 61158-4-7:2008
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 61158-4-7:2008 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61158-4-7:2008

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SIST EN 61158-4-7:2008


EUROPEAN STANDARD
EN 61158-4-7

NORME EUROPÉENNE
February 2008
EUROPÄISCHE NORM

ICS 35.100.20; 25.040.40 Partially supersedes EN 61158-4:2004


English version


Industrial communication networks -
Fieldbus specifications -
Part 4-7: Data-link layer protocol specification -
Type 7 elements
(IEC 61158-4-7:2007)


Réseaux de communication industriels -  Industrielle Kommunikationsnetze -
Spécifications des bus de terrain - Feldbusse -
Partie 4-7: Spécification des protocoles Teil 4-7: Protokollspezifikation des
des couches de liaison de données - Data Link Layer (Sicherungsschicht) -
Eléments de type 7 Typ 7-Elemente
(CEI 61158-4-7:2007) (IEC 61158-4-7:2007)




This European Standard was approved by CENELEC on 2008-02-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, 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 and the United Kingdom.

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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61158-4-7:2008 E

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SIST EN 61158-4-7:2008
EN 61158-4-7:2008 - 2 -
Foreword
The text of document 65C/474/FDIS, future edition 1 of IEC 61158-4-7, 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 was approved by CENELEC as EN 61158-4-7 on 2008-02-01.
This and the other parts of the EN 61158-4 series supersede EN 61158-4:2004.
With respect to EN 61158-4:2004 the following changes were made:
– deletion of Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data-link layer, for lack of market
relevance;
– addition of new fieldbus types;
– partition into multiple parts numbered 4-1, 4-2, …, 4-19.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-02-01
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 the
EN 61784 series. Use of the various protocol types in other combinations may require permission from their respective
intellectual-property-right holders.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61158-4-7:2007 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 60870-5-1 NOTE  Harmonized as EN 60870-5-1:1993 (not modified).
IEC 61131-2 NOTE  Harmonized as EN 61131-2:2007 (not modified).
IEC 61131-3 NOTE  Harmonized as EN 61131-3:2003 (not modified).
IEC 61158-5-7 NOTE  Harmonized as EN 61158-5-7:2008 (not modified).
IEC 61158-6-7 NOTE  Harmonized as EN 61158-6-7:2008 (not modified).
IEC 61784-1 NOTE  Harmonized as EN 61784-1:2008 (not modified).
ISO/IEC 9646-1 NOTE  Harmonized as EN ISO/IEC 9646-1:1996 (not modified).
ISO/IEC 9646-2 NOTE  Harmonized as EN ISO/IEC 9646-2:1996 (not modified).
__________

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SIST EN 61158-4-7:2008
- 3 - EN 61158-4-7:2008
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

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.

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 61158-2 2007 Industrial communication networks - EN 61158-2 2008
Fieldbus specifications -
Part 2: Physical layer specification and service
definition


1) 2)
IEC 61158-3-7 - Industrial communication networks - EN 61158-3-7 2008
Fieldbus specifications -
Part 3-7: Data-link layer service definition -
Type 7 elements


1) 2)
ISO/IEC 7498-1 - Information technology - Open Systems EN ISO/IEC 7498-1 1995
Interconnection - Basic Reference Model:
The Basic Model


1)
ISO/IEC 7498-3 - Information technology - Open Systems - -
Interconnection - Basic Reference Model:
Naming and addressing


1)
ISO/IEC 10731 - Information technology - Open Systems - -
Interconnection - Basic reference model -
Conventions for the definition of OSI services




1)
Undated reference.
2)
Valid edition at date of issue.

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SIST EN 61158-4-7:2008

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SIST EN 61158-4-7:2008
IEC 61158-4-7
Edition 1.0 2007-12
INTERNATIONAL
STANDARD

Industrial communication networks – Fieldbus specifications –
Part 4-7: Data-link layer protocol specification – Type 7 elements


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XE
ICS 35.100.20; 25.040.40 ISBN 2-8318-9434-4

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SIST EN 61158-4-7:2008
– 2 – 61158-4-7 © IEC:2007(E)

CONTENTS
FOREWORD.6
INTRODUCTION.8
1 Scope.9
1.1 General .9
1.2 Specifications.9
1.3 Procedures.9
1.4 Applicability.9
1.5 Conformance.9
2 Normative references .10
3 Terms, definitions, symbols and abbreviations.10
3.1 Reference model terms and definitions.10
3.2 Service convention terms and definitions.11
3.3 Other terms and definitions .12
3.4 Symbols and abbreviations.16
4 Overview of the DL-protocol .18
4.1 Overall description of medium allocation .18
4.2 Types of entities.20
4.3 Addressing .23
4.4 Flow control.29
4.5 Graphical representation .31
5 General structure and encoding of PhIDUs and DLPDUs and related elements of
procedure.32
5.1 DLPDU formats and components.32
5.2 Description of each DLPDU component .32
5.3 PhIDU structure and encoding.36
5.4 Common DLPDU structure, encoding and elements of procedure .37
5.5 Valid DLPDU types.37
5.6 DLL timers.39
6 DLPDU-specific structure, encoding and element of procedure.43
6.1 General .43
6.2 Buffer read .43
6.3 Buffer write.44
6.4 Buffer transfer .44
6.5 Specified explicit request.45
6.6 Free explicit request.50
6.7 Messaging.53
6.8 Acknowledged messaging .58
6.9 Numbering of acknowledged messages.62
6.10 Behavior with mismatched parameters .64
7 DL-service elements of procedure, interfaces and conformance .66
7.1 General .66
7.2 Producer/consumer entity.67
7.3 Protocol elements by service.70
7.4 Bus arbitrator operation.77
7.5 Bridges.85
7.6 Interfaces .92

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SIST EN 61158-4-7:2008
61158-4-7 © IEC:2007(E) – 3 –

7.7 Conformance.94
Annex A (informative) Exemplary FCS implementation.97
Annex B (informative) Object modeling .99
B.1 Modeling of the IDENTIFIER object .99
B.2 Description of the IDENTIFIER object attributes .99
B.3 Modeling of the QUEUE object .103
B.4 Description of the QUEUE object attributes . 103
B.5 Modeling of the BUFFER object.104
B.6 Description of the BUFFER object attributes. 104
Annex C (informative) Topology of multi-segment DL-subnetwork . 106
C.1 Introduction .106
C.2 Global specification .106
C.3 Local specification.107
C.4 Properties .107
C.5 Methods .107
Annex D (informative) Management of transmission errors . 111
D.1 Transmission of RP_DAT_XX .111
D.2 Transmission of a free RP_RQ(1/2) .111
D.3 Transmission of the specified RP_RQ1 . 112
D.4 Transmission of RP_MSG_NOACK.113
D.5 Transmission of RP_MSG_ACK.115
Bibliography.118

Figure 1 – Relationships of DLSAPs, DLSAP-addresses and group DL-addresses .13
Figure 2 – General description of medium allocation.19
Figure 3 – Internal structure of a producer/consumer entity.20
Figure 4 – Associated buffers and queues .22
Figure 5 – Internal structure of a bus arbitrator .23
Figure 6 – Polling BA Table .23
Figure 7 – Addressing scheme.24
Figure 8 – Address partitioning .26
Figure 9 – Structure of an individual physical address .27
Figure 10 – Structure of an individual logical address .27
Figure 11 – Structure of restricted physical group address.27
Figure 12 – Structure of a restricted logical group address .28
Figure 13 – Structure of a generalized group address .28
Figure 14 – Summary of address structure.29
Figure 15 – Example of an evaluation net .31
Figure 16 – Basic DLPDU structure.32
Figure 17 – DLPDU transmission / reception order.32
Figure 18 – Identifier DLPDU .38
Figure 19 – Variable response DLPDU.38
Figure 20 – Request response DLPDU.38
Figure 21 – Message response DLPDU.39
Figure 22 – Acknowledgement response DLPDU .39

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SIST EN 61158-4-7:2008
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Figure 23 – End of message transaction response DLPDU .39
Figure 24 – Buffer reading service interactions .44
Figure 25 – Buffer writing service interactions.44
Figure 26 – Buffer transfer service interactions .44
Figure 27 – Buffer transfer DLPDU sequence .45
Figure 28 – Interactions within the specified explicit request for buffer transfer service
in the aperiodic window.46
Figure 29 – Interactions within the specified explicit request for buffer transfer service
in the periodic window.47
Figure 30 – DLPDU sequence for an explicit request for a transfer .48
Figure 31 – Evaluation network for a buffer transfer specified explicit request with
(RQ_INHIBITED = False) .49
Figure 32 – Evaluation network for a buffer transfer specified explicit request with
(RQ_INHIBITED = True).49
Figure 33 – Diagram of interactions within the free explicit request for buffer transfer
service .51
Figure 34 – Evaluation network for a free explicit request .52
Figure 35 – Diagram of interactions within the unacknowledged message transfer
request service for an aperiodic transfer .55
Figure 36 – Diagram of interactions within the unacknowledged message transfer
request service for a cyclical transfer .56
Figure 37 – DLPDU sequence for an aperiodic message transfer.57
Figure 38 – DLPDU sequence for a cyclical message transfer .58
Figure 39 – Diagram of interactions within the acknowledged message transfer request
service for an aperiodic transfer .59
Figure 40 – Diagram of interactions within the acknowledged message transfer request
service for a cyclical transfer.60
Figure 41 – DLPDU sequence for an aperiodic message transfer.61
Figure 42 – DLPDU sequence for a cyclical message transfer .62
Figure 43 – Evaluation network for message aperiodic transfer.65
Figure 44 – Evaluation network for message cyclic transfer .66
Figure 45 – Simplified states machine for a producer/consumer entity .67
Figure 46 – Active bus arbitrator's simplified state machine .83
Figure 47 – Typical bridge usage .85
Figure 48 – Architectural placement of bridges in OSI Basic Reference Model (ISO/IEC
7498) .85
Figure 49 – Representation of an extended link communication .86
Figure 50 – Evaluation network for reception of an RP_MSG_ACK DLPDU.91
Figure 51 – Evaluation network for reception of an RP_MSG_NOACK DLPDU.92
Figure A.1 – Example of FCS generation .97
Figure A.2 – Example of FCS syndrome checking on reception.97
Figure D.1 – Evaluation DL-subnetwork for transmission of RP_DAT_XX.111
Figure D.2 – Evaluation DL-subnetwork for transmission of a free RP_RQ(1/2). 112
Figure D.3 – Evaluation DL-subnetwork for transmission of the specified RP_RQ1 . 113
Figure D.4 – Evaluation DL-subnetwork for transmission of RP_MSG_NOACK, first
behavior.114

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SIST EN 61158-4-7:2008
61158-4-7 © IEC:2007(E) – 5 –

Figure D.5 – Evaluation DL-subnetwork for transmission of RP_MSG_NOACK, second
behavior.115
Figure D.6 – Evaluation DL-subnetwork for transmission of RP_MSG_ACK, first
behavior.116
Figure D.7 – Evaluation DL-subnetwork for transmission of RP_MSG_ACK, second
behavior.117

Table 1 – Individual and group address encoding .26
Table 2 – DLPDU control-field coding .33
Table 3 – Correspondence between name and coding of 8 bits in the control field .34
Table 4 – FCS length, polynomial and expected residual .35
Table 5 – DL-Timers .41
Table 6 – Bus arbitrator state transition table.84
Table 7 – Bridge object description .87
Table 8 – Channel object description .88
Table 9 – Segment directory object description.89
Table 10 – Network directory object description .89
Table 11 – Service primitives by type.93
Table 12 – Conformance classes .96

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SIST EN 61158-4-7:2008
– 6 – 61158-4-7 © IEC:2007(E)

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –

Part 4-7: Data-link layer protocol specification – Type 7 elements


FOREWORD
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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 the IEC 61784 series. Use of the various
...