SIST EN IEC 61158-6-21:2019

Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification - Type 21 elements (IEC 61158-6-21:2019)

This document 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. This International Standard contains material specific to the Type 21 communication protocol.

Industrielle Kommunikationsnetze - Feldbusse - Teil 6-21: Protokollspezifikation des Application Layer (Anwendungsschicht) - Typ 21-Elemente (IEC 61158-6-21:2019)

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-21: Spécification du protocole de la couche application - Eléments de type 21 (IEC 61158-6-21:2019)

L’IEC 61158-6-21:2019 appartient à une série élaborée pour faciliter l’interconnexion des composants des systèmes d’automatisation. Elle est liée à d'autres normes de la série telle que définie par le modèle de référence des bus de terrain "à trois couches" décrit dans l’IEC 61158‑1.
La présente Norme internationale contient des éléments spécifiques au protocole de communication de Type 21.

Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-21. del: Specifikacija protokola na aplikacijski ravni - Elementi tipa 21 (IEC 61158-6-21:2019)

Ta dokument 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 61158-1. Ta mednarodni standard vsebuje material, specifičen za komunikacijski protokol tipa 21.

General Information

• Status: Published
• Publication Date: 10-Oct-2019
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.70 - Application layer
• ICS: 35.110 - Networking
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 30-Aug-2019
• Due Date: 04-Nov-2019
• Completion Date: 11-Oct-2019
• Ref Project: EN IEC 61158-6-21:2019 - Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification - Type 21 elements

Relations

• Replaces: 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)
• Effective Date: 27-Aug-2019

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61158-6-21:2019
01-november-2019
Nadomešča:
SIST EN 61158-6-21:2012
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-21. del:
Specifikacija protokola na aplikacijski ravni - Elementi tipa 21 (IEC 61158-6-
21:2019)
Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer
protocol specification - Type 21 elements (IEC 61158-6-21:2019)
Industrielle Kommunikationsnetze - Feldbusse - Teil 6-21: Protokollspezifikation des
Application Layer (Anwendungsschicht) - Typ 21-Elemente (IEC 61158-6-21:2019)
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-21:
Spécification du protocole de la couche application - Eléments de type 21 (IEC 61158-6-
21:2019)
Ta slovenski standard je istoveten z: EN IEC 61158-6-21:2019
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
SIST EN IEC 61158-6-21:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61158-6-21:2019


EUROPEAN STANDARD EN IEC 61158-6-21

NORME EUROPÉENNE

EUROPÄISCHE NORM
August 2019
ICS 25.040.40; 35.100.70; 35.110 Supersedes EN 61158-6-21:2012 and all of its
amendments and corrigenda (if any)
English Version
Industrial communication networks - Fieldbus specifications -
Part 6-21: Application layer protocol specification - Type 21
elements
(IEC 61158-6-21:2019)
Réseaux de communication industriels - Spécifications des Industrielle Kommunikationsnetze - Feldbusse - Teil 6-21:
bus de terrain - Partie 6-21: Spécification du protocole de la Protokollspezifikation des Application Layer
couche application - Eléments de type 21 (Anwendungsschicht) - Typ 21-Elemente
(IEC 61158-6-21:2019) (IEC 61158-6-21:2019)
This European Standard was approved by CENELEC on 2019-07-25. 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 61158-6-21:2019 E

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SIST EN IEC 61158-6-21:2019
EN IEC 61158-6-21:2019 (E)
European foreword
The text of document 65C/948/FDIS, future edition 2 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 IEC 61158-6-21:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-04-25
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-07-25
document have to be withdrawn

This document supersedes EN 61158-6-21:2012 and all of its amendments and corrigenda (if any).
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 61158-6-21:2019 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 61158-1:2019 NOTE Harmonized as EN IEC 61158-1:2019 (not modified)
IEC 61784-2:2019 NOTE Harmonized as EN IEC 61784-2:2019 (not modified)

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SIST EN IEC 61158-6-21:2019
EN IEC 61158-6-21:2019 (E)
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 61158-3-21 2019 Industrial communication networks - Fieldbus EN IEC 61158-3-21 2019
specifications - Part 3-21: Data-link layer
service definition - Type 21 elements
IEC 61158-4-21 2019 Industrial communication networks - Fieldbus EN IEC 61158-4-21 2019
specifications - Part 4-21: Data-link layer
protocol specification - Type 21 elements
IEC 61158-5-21 2019 Industrial communication networks - Fieldbus EN IEC 61158-5-21 2019
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
Information technology - Telecommunications
ISO/IEC/IEEE -  - -
and information exchange between systems -
8802-3
Local and metropolitan area networks - Specific
requirements - Part 3: Standard for Ethernet
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 10731 -  Information technology - Open Systems - -
Interconnection - Basic Reference Model -
Conventions for the definition of OSI services
ISO/IEC 9899 -  Information technology - Programming - -
languages - C
IEEE 754 2008 IEEE Standard for Binary Floating-Point - -
Arithmetic

3

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SIST EN IEC 61158-6-21:2019

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SIST EN IEC 61158-6-21:2019



IEC 61158-6-21

®


Edition 2.0 2019-06




INTERNATIONAL



STANDARD



















Industrial communication networks – Fieldbus specifications –

Part 6-21: Application layer protocol specification – Type 21 elements



























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-7013-4




  Warning! Make sure that you obtained this publication from an authorized distributor.


® Registered trademark of the International Electrotechnical Commission

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SIST EN IEC 61158-6-21:2019
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CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
1.1 General . 9
1.2 Overview. 9
1.3 Specifications . 9
1.4 Conformance . 10
2 Normative references . 10
3 Terms, definitions, symbols, abbreviations and conventions . 10
3.1 Terms and definitions from other ISO/IEC standards . 11
3.1.1 ISO/IEC 7498-1 terms . 11
3.1.2 ISO/IEC 8822 terms . 11
3.1.3 ISO/IEC 8824-1 terms . 11
3.1.4 ISO/IEC 9545 terms . 11
3.2 Other terms and definitions . 11
3.3 Abbreviations and symbols . 17
3.4 Conventions . 18
3.4.1 General conventions . 18
3.4.2 Convention for the encoding of reserved bits and octets . 18
3.4.3 Conventions for the common coding of specific field octets . 18
3.4.4 Conventions for APDU abstract syntax definitions . 19
3.4.5 Conventions for APDU transfer syntax definitions . 19
3.4.6 Conventions for AE state machine definitions . 20
4 FAL syntax description . 21
4.1 General . 21
4.2 FAL-AR PDU abstract syntax . 21
4.2.1 Top level definition . 21
4.2.2 Confirmed send service . 21
4.2.3 Unconfirmed send service . 21
4.2.4 FalArHeader . 21
4.2.5 InvokeID . 21
4.2.6 ServiceType . 21
4.3 Abstract syntax of PDU body . 22
4.3.1 ConfirmedServiceRequest PDUs . 22
4.3.2 ConfirmedServiceResponse PDUs . 22
4.3.3 UnconfirmedServiceRequest PDUs . 22
4.3.4 Error information . 22
4.4 Protocol data units (PDUs) for application service elements (ASEs) . 23
4.4.1 PDUs for Application process ASE . 23
4.4.2 PDUs for Service data object ASE . 25
4.4.3 PDUs for Process data object ASE . 28
5 Transfer Syntax . 28
5.1 Overview of encoding. 28
5.2 APDU header encoding . 29
5.2.1 Encoding of FalArHeader field . 29
5.2.2 Encoding of InvokeID Field . 29

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5.2.3 Encoding of Type field . 29
5.3 APDU body encoding . 30
5.3.1 General . 30
5.4 Encoding of Data types . 30
5.4.1 General description of data types and encoding rules . 30
5.4.2 Transfer syntax for bit sequences . 30
5.4.3 Encoding of a Boolean value . 31
5.4.4 Encoding of an unsigned integer value . 31
5.4.5 Encoding of a signed integer . 31
5.4.6 Encoding of a floating point value . 32
5.4.7 Encoding of an octet string value . 32
5.4.8 Encoding of a visible string value . 33
5.4.9 Encoding of a Unicode string value . 33
5.4.10 Encoding of a time of day value . 33
5.4.11 Encoding of a Time Difference value . 33
6 FAL protocol state machines . 34
7 AP context state machine . 36
8 FAL service protocol machine . 36
8.1 General . 36
8.2 Common parameters of the primitives . 36
8.3 AP ASE protocol machine . 36
8.3.1 Primitive definitions . 36
8.3.2 State machine . 38
8.4 Service data object ASE protocol machine (SDOM) . 40
8.4.1 Primitive definitions . 40
8.4.2 State machine . 41
8.5 Process data object ASE protocol machine (PDOM) . 44
8.5.1 Primitive definitions . 44
8.5.2 State machine . 44
9 AR protocol machine . 45
9.1 General . 45
9.2 Point-to-point user-triggered confirmed client/server AREP (PTC-AR) ARPM . 46
9.2.1 PTC-AR Primitive definitions . 46
9.2.2 DLL mapping of PTC-AREP class . 46
9.2.3 PTC-ARPM state machine . 47
9.3 Multipoint network-scheduled unconfirmed publisher/subscriber AREP
(MSU-AR) ARPM . 48
9.3.1 MSU-AR primitive definitions . 48
9.3.2 DLL mapping of MSU-AR class . 49
9.3.3 MSU-ARPM state machine. 49
9.4 Multipoint user-triggered unconfirmed publisher/subscriber AREP (MTU-AR)
ARPM . 51
9.4.1 MTU-AR primitive definitions . 51
9.4.2 DLL mapping of MTU-AR class . 51
9.4.3 MTU-ARPM state machine . 52
10 DLL mapping protocol machine . 53
10.1 Primitive definitions . 53
10.1.1 Primitives exchanged between DMPM and ARPM . 53
10.1.2 Parameters of ARPM/DMPM primitives . 53

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10.1.3 Primitives exchanged between DLL and DMPM . 53
10.1.4 Parameters of DMPM/DLL primitives . 54
10.2 DMPM state machine . 54
10.2.1 DMPM states . 54
10.2.2 DMPM state table . 54
10.2.3 Functions used by DMPM . 54
Bibliography . 55

Figure 1 – Common structure of specific fields . 19
Figure 2 – APDU overview . 29
Figure 3 – Type field . 30
Figure 4 – Encoding of Time of Day value . 33
Figure 5 – Encoding of Time Difference value . 34
Figure 6 – Primitives exchanged between protocol machines . 35
Figure 7 – State transition diagram of APAM . 38
Figure 8 – State transition diagram of SDOM . 41
Figure 9 – State transition diagram of PDOM . 44
Figure 10 – State transition diagram of PTC-ARPM . 47
Figure 11 – State transition diagram of MSU-ARPM . 50
Figure 12 – State transition diagram of MTU-ARPM . 52
Figure 13 – State transition diagram of DMPM . 54

Table 1 – Conventions used for AE state machine definitions . 20
Table 2 – Status code for the confirmed response primitive . 23
Table 3 – Encoding of FalArHeader field . 29
Table 4 – Transfer Syntax for bit sequences . 30
Table 5 – Transfer syntax for data type UNSIGNEDn . 31
Table 6 – Transfer syntax for data type INTEGERn . 32
Table 7 – Primitives exchanged between FAL-user and APAM . 37
Table 8 – Parameters used with primitives exchanged FAL-user and APAM . 38
Table 9 – APAM state table – Sender transitions . 38
Table 10 – APAM state table – Receiver transitions . 39
Table 11 – Functions used by the APAM . 39
Table 12 – Primitives exchanged between FAL-user and SDOM . 40
Table 13 – Parameters used with primitives exchanged FAL-user and SDOM . 41
Table 14 – SDOM state table – Sender transitions . 42
Table 15 – SDOM state table – Receiver transitions . 43
Table 16 – Functions used by the SDOM . 43
Table 17 – Primitives exchanged between FAL-user and PDOM . 44
Table 18 – Parameters used with primitives exchanged between FAL-user and PDOM . 44
Table 19 – PDOM state table – Sender transitions . 45
Table 20 – PDOM state table – Receiver transitions . 45
Table 21 – Functions used by the SDOM . 45
Table 22 – Primitives issued by user to PTC-ARPM . 46

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Table 23 – Primitives issued by PTC-ARPM to user . 46
Table 24 – PTC-ARPM state table – sender transactions . 47
Table 25 – PTC-ARPM state table – receiver transactions . 48
Table 26 – Function BuildFAL-PDU . 48
Table 27 – Primitives issued by user to ARPM . 48
Table 28 – Primitives issued by ARPM to user . 48
Table 29 – MSU-ARPM state table – sender transactions . 50
Table 30 – MSU-ARPM state table – receiver transactions . 50
Table 31 – Function BuildFAL-PDU . 50
Table 32 – Primitives issued by user to ARPM . 51
Table 33 – Primitives issued by ARPM to user . 51
Table 34 – MTU-ARPM state table – sender transactions. 52
Table 35 – MTU-ARPM state table – receiver transactions . 52
Table 36 – Function BuildFAL-PDU . 53
Table 37 – Primitives issued by ARPM to DMPM . 53
Table 38 – Primitives issued by DMPM to ARPM . 53
Table 39 – Primitives issued by DMPM to DLL . 53
Table 40 – Primitives issued by DLL to DMPM . 53
Table 41 – DMPM state table – sender transactions. 54
Table 42 – DMPM state table – receiver transactions . 54

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –

Part 6-21: Application layer protocol specification –
Type 21 elements

FOREWORD
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