EN 61158-6-21:2012

Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification - Type 21 elements

IEC 61158-6-21:2010(E) specifies the protocol of the Type 21 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545). It defines the protocol provided to define the wire-representation of the service primitives defined in IEC 61158-5-21:2010, and the externally visible behavior associated with their transfer. This standard cancels and replaces IEC/PAS 62573 published in 2008.

Industrielle Kommunikationsnetze - Feldbusse - Teil 6-21: Protokollspezifikation des Application Layer (Anwendungsschicht) - Typ 21-Elemente

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-21: Spécification des protocoles des couches d'application - Eléments de type 21

Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-21. del: Specifikacija protokola na aplikacijskem nivoju - Elementi tipa 21 (IEC 61158-6-21:2010)

Ta standard spada v skupino standardov, namenjenih za lažje medsebojno povezovanje sestavnih delov avtomatizacijskega sistema. Povezan je z drugimi standardi v sklopu, kakor je opredeljeno s trinivojskim referenčnim modelom procesnih vodil iz standarda IEC/TR 61158-1:2010. Ta standard vsebuje material, specifičen za komunikacijski protokol tipa 21.

General Information

• Status: Withdrawn
• Publication Date: 21-Jun-2012
• Withdrawal Date: 27-Mar-2015
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.70 - Application 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: 9960 - Withdrawal effective - Withdrawal
• Start Date: 25-Jul-2022
• Completion Date: 25-Jul-2022
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN 61158-6-21:2012 - Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification - Type 21 elements (IEC 61158-6-21:2010)

Relations

• Replaced By: EN IEC 61158-6-21:2019 - Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification - Type 21 elements
• Effective Date: 23-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2012
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-21. del:
Specifikacija protokola na aplikacijskem nivoju - Elementi tipa 21 (IEC 61158-6-
21:2010)
Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer
protocol specification - Type 21 elements (IEC 61158-6-21:2010)
Industrielle Kommunikationsnetze - Feldbusse - Teil 6-21: Protokollspezifikation des
Application Layer (Anwendungsschicht) - Typ 21-Elemente (IEC 61158-6-21:2010)
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-21:
Spécification des protocoles des couches d'application - Eléments de type 21 (CEI
61158-6-21:2010)
Ta slovenski standard je istoveten z: EN 61158-6-21:2012
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61158-6-21
NORME EUROPÉENNE
June 2012
EUROPÄISCHE NORM
ICS 25.040.40; 35.100.70; 35.110

English version
Industrial communication networks -
Fieldbus specifications -
Part 6-21: Application layer protocol specification -
Type 21 elements
(IEC 61158-6-21:2010)
Réseaux de communication industriels -  Industrielle Kommunikationsnetze -
Spécifications des bus de terrain - Feldbusse -
Partie 6-21: Spécification des protocoles Teil 6-21: Protokollspezifikation des
des couches d'application - Application Layer (Anwendungsschicht) -
Eléments de type 21 Typ 21-Elemente
(CEI 61158-6-21:2010) (IEC 61158-6-21:2010)

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 61158-6-21:2012 E
Foreword
The text of document 65C/607/FDIS, future edition 1 of IEC 61158-6-21, 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 61158-6-21:2012.

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
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 61158-6-21:2010 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/TR 61158-1:2010 NOTE  Harmonized as CLC/TR 61158-1:2010 (not modified).
IEC 61784-2:2010 NOTE  Harmonized as EN 61784-2:2010 (not modified).

- 3 - EN 61158-6-21:2012
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 61158-3-21 2010 Industrial communication networks - Fieldbus EN 61158-3-21 2012
specifications -
Part 3-21: Data-link layer service definition -
Type 21 elements
IEC 61158-4-21 2010 Industrial communication networks - Fieldbus EN 61158-4-21 2012
specifications -
Part 4-21: Data-link layer protocol
specification - Type 21 elements

IEC 61158-5-21 2010 Industrial communication networks - Fieldbus EN 61158-5-21 2012
specifications -
Part 5-21: Application layer service definition -
Type 21 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 9899 - Programming Languages - C - -

ISO/IEC 10731 1994 Information technology - Open Systems - -
Interconnection - Basic reference model -
Conventions for the definition of OSI services

IEEE 754 2008 Binary floating-point arithmetic - -

IEC 61158-6-21 ®
Edition 1.0 2010-08
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-21: Application layer protocol specification – Type 21 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XA
ICS 25.04.40; 35.100.70; 35.110 ISBN 978-2-88912-135-9
– 2 – 61158-6-21 © IEC:2010(E)
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.8
1.1 General .8
1.2 Overview .8
1.3 Specifications.9
1.4 Conformance.9
2 Normative references .9
3 Terms, definitions, symbols, abbreviations, and conventions .10
3.1 Terms and definitions from other ISO/IEC standards .10
3.2 Other terms and definitions .10
3.3 Abbreviations and symbols.16
3.4 Conventions .17
4 FAL syntax description .19
4.1 General .19
4.2 FAL-AR PDU abstract syntax .19
4.3 Abstract syntax of PDU body.20
4.4 Protocol data units (PDUs) for application service elements (ASEs) .21
5 Transfer Syntax .24
5.1 Overview of encoding .24
5.2 APDU header encoding .25
5.3 APDU body encoding .26
5.4 Encoding of Data types .26
6 FAL protocol state machines .30
7 AP context state machine .32
8 FAL service protocol machine.32
8.1 General .32
8.2 Common parameters of the primitives .32
8.3 AP ASE protocol machine .32
8.4 Service data object ASE protocol machine (SDOM).36
8.5 Process data object ASE protocol machine (PDOM) .40
9 AR protocol machine .41
9.1 General .41
9.2 Point-to-point user-triggered confirmed client/server AREP (PTC-AR) ARPM .42
9.3 Multipoint network-scheduled unconfirmed publisher/subscriber AREP
(MSU-AR) ARPM.44
9.4 Multipoint user-triggered unconfirmed publisher/subscriber AREP (MTU-AR)
ARPM.47
10 DLL mapping protocol machine .49
10.1 Primitive definitions .49
10.2 DMPM state machine .50
Bibliography.51

Figure 1 – Common structure of specific fields.17
Figure 2 – APDU overview .25

61158-6-21 © IEC:2010(E) – 3 –
Figure 3 – Type field.25
Figure 4 – Encoding of Time of Day value.29
Figure 5 – Encoding of Time Difference value.30
Figure 6 – Primitives exchanged between protocol machines.31
Figure 7 – State transition diagram of APAM.34
Figure 8 – State transition diagram of SDOM .37
Figure 9 – State transition diagram of PDOM .40
Figure 10 – State transition diagram of PTC-ARPM .43
Figure 11 – State transition diagram of MSU-ARPM.46
Figure 12 – State transition diagram of MTU-ARPM .48
Figure 13 – State transition diagram of DMPM .50

Table 1 – Conventions used for AE state machine definitions .18
Table 2 – Status code for the confirmed response primitive .21
Table 3 – Encoding of FalArHeader field.25
Table 4 – Transfer Syntax for bit sequences .26
Table 5 – Transfer syntax for data type UNSIGNEDn.27
Table 6 – Transfer syntax for data type INTEGERn.28
Table 7 – Primitives exchanged between FAL-user and APAM.33
Table 8
...