EN IEC 61158-6-27:2023

Industrial communication networks - Fieldbus Specifications Part 6-27: Application layer protocol specification - Type 27 elements

1.1 General The fieldbus application layer (FAL) provides user programs with a means to access the fieldbus communication environment. In this respect, the FAL can be viewed as a "window between corresponding application programs." This part of IEC 61158 provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 27 fieldbus. The term "time-critical" is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life. This International Standard defines in an abstract way the externally visible service provided by the different Types of fieldbus Application Layer in terms of a) an abstract model for defining application resources (objects) capable of being manipulated by users via the use of the FAL service, b) the primitive actions and events of the service, c) the parameters associated with each primitive action and event, and the form which they take, and d) the interrelationship between these actions and events, and their valid sequences. The purpose of this International Standard is to define the services provided to a) the FAL user at the boundary between the user and the Application Layer of the Fieldbus Reference Model, and b) Systems Management at the boundary between the Application Layer and Systems Management of the Fieldbus Reference Model. This International Standard specifies the structure and services of the IEC fieldbus Application Layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI Application Layer Structure (ISO/IEC 9545). FAL services and protocols are provided by FAL application-entities (AE) contained within the application processes. The FAL AE is composed of a set of object-oriented Application Service Elements (ASEs) and a Layer Management Entity (LME) that manages the AE. The ASEs provide communication services that operate on a set of related application process object (APO) classes. One of the FAL ASEs is a management ASE that provides a common set of services for the management of the instances of FAL classes. Although these services specify, from the perspective of applications, how request and responses are issued and delivered, they do not include a specification of what the requesting and responding applications are to do with them. That is, the behavioral aspects of the applications are not specified; only a definition of what requests and responses they can send/receive is specified. This permits greater flexibility to the 289 FAL users in standardizing such object behavior. In addition to these services, some supporting services are also defined in this International Standard to provide access to the FAL to control certain aspects of its operation. 1.2 Specifications [...] 1.3 Conformance [...]

Industrielle Kommunikationsnetze - Feldbusse - Teil 6-27: Protokollspezifikation des Application Layer (Anwendungsschicht) - Typ 27-Elemente

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-27 : Spécification du protocole de la couche application - Éléments de type 27

L’IEC 61158-6-27:2023 donne les éléments communs visant à assurer les communications de messagerie de base à temps critique et à temps non critique entre les programmes d’application d’un environnement d’automatisation et d’un matériel spécifique au bus de terrain de type 27. Le terme "à temps critique" est utilisé pour indiquer la présence d’une fenêtre temporelle, dans laquelle il est exigé de réaliser une ou plusieurs actions spécifiées selon un niveau défini de certitude. Tout manquement à réaliser ces actions dans la fenêtre de temps prévue risque de provoquer la défaillance des applications qui les demandent, avec le risque de mettre en danger l’équipement, l’usine, voire les personnes. Le présent document définit de manière abstraite les caractéristiques visibles de l’extérieur fournies par la couche application de bus de terrain de type 27 en ce qui concerne: la syntaxe abstraite définissant les unités de données du protocole de la couche application transmises entre les entités d’application de communication; la syntaxe de transfert définissant les unités de données du protocole de la couche application transmises entre les entités d’application de communication; les diagrammes d’états de contexte d’application définissant le comportement de service d’application observable entre les entités d’application en communication; et les diagrammes d’états de relations entre applications définissant le comportement de communication visible entre les entités d’application en communication.

Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-27. del: Specifikacija protokola na aplikacijski ravni - Elementi tipa 27 (IEC 61158-6-27:2023)

Aplikacijska raven procesnih vodil (FAL) uporabniškim programom omogoča dostop do komunikacijskega okolja procesnih vodil. Glede na to je mogoče aplikacijsko raven procesnih vodil šteti za »okno med ustreznimi aplikacijami«.
Ta del standarda IEC 61158 določa skupne elemente za osnovne časovno kritične in časovno nekritične sporočilne komunikacije med aplikacijami v avtomatizacijskem okolju ter material, specifičen za procesna vodila tipa 27. Izraz »časovno kritičen« se uporablja za predstavitev prisotnosti časovnega okna, v okviru katerega se zahteva dokončanje enega ali več opredeljenih dejanj z določeno stopnjo gotovosti. Zaradi neuspešnega dokončanja opredeljenih dejanj v časovnem oknu je možna odpoved aplikacij, ki zahtevajo dejanja, pri čemer so ogroženi oprema, obrat in morda človeška življenja.
Ta mednarodni standard na abstrakten način določa na zunaj vidno opravilo, ki ga zagotavlja aplikacijska raven procesnih vodil različnih tipov v smislu:
a) abstraktnega modela za določanje aplikacijskih virov (objektov), ki ga lahko upravljajo uporabniki prek opravila aplikacijske ravni procesnih vodil,
b) primitivnih dejanj in dogodkov opravila;
c) parametrov, povezanih z vsakim primitivnim dejanjem in dogodkom, ter obliko, ki jo prevzamejo, in
d) medsebojne povezave med temi dejanji in dogodki ter njihovimi veljavnimi zaporedji.
Namen tega mednarodnega standarda je določiti opravila, ki se zagotavljajo za:
a) uporabnika aplikacijske ravni procesnih vodil na meji med uporabniško in aplikacijsko ravnjo referenčnega modela procesnega vodila, in
b) upravljanje sistemov na meji med aplikacijsko ravnjo in upravljanjem sistemov za referenčni model procesnega vodila.
Ta mednarodni standard določa strukturo in opravila aplikacijske ravni procesnih vodil IEC v skladu z osnovnim referenčnim modelom OSI (ISO/IEC 7498-1) in strukturo aplikacijske ravni OSI (ISO/IEC 9545).
Opravila in protokole aplikacijske ravni procesnih vodil zagotavljajo aplikacijski osebki (AE) aplikacijske ravni procesnih vodil znotraj aplikacijskih procesov. Aplikacijski osebek aplikacijske ravni procesnih vodil sestavljata sklop objektno usmerjenih aplikacijskih opravilnih elementov (ASE) in osebek za upravljanje ravni (LME), ki upravlja aplikacijski osebek. Aplikacijski opravilni elementi zagotavljajo komunikacijska opravila, ki delujejo na sklopu povezanih razredov objektov aplikacijskega procesa (APO). Med aplikacijske opravilne elemente aplikacijske ravni procesnih vodil spada aplikacijski opravilni element za upravljanje, ki zagotavlja skupen sklop opravil za upravljanje primerkov razredov aplikacijske ravni procesnih vodil.
Čeprav ta opravila določajo način izdajanja ter dostavljanja zahtev in odzivov z vidika aplikacij, ne zajemajo specifikacije v zvezi s tem, kako naj se nanje odzovejo aplikacije, ki te zahteve in odzive oddajajo. To pomeni, da vedenjski vidiki aplikacij niso opredeljeni; opredeljena je le definicija zahtev in odzivov, ki jih lahko pošiljajo/prejemajo. Tako se 289 uporabnikom aplikacijske ravni procesnih vodil omogoči večja prilagodljivost pri standardizaciji takega vedenja objektov. Poleg teh opravil so v tem mednarodnem standardu opredeljena tudi nekatera podporna opravila, da se omogoči dostop do aplikacijske ravni procesnih vodil za nadzorovanje nekaterih vidikov njenega delovanja.

General Information

• Status: Published
• Publication Date: 20-Apr-2023
• ICS: 25.040 - Industrial automation systems
• 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-Apr-2023
• Due Date: 31-Oct-2023
• Completion Date: 21-Apr-2023
• Ref Project: SIST EN IEC 61158-6-27:2023 - Industrial communication networks - Fieldbus Specifications Part 6-27: Application layer protocol specification - Type 27 elements (IEC 61158-6-27:2023)

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2023
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-27. del:
Specifikacija protokola na aplikacijski ravni - Elementi tipa 27 (IEC 61158-6-
27:2023)
Industrial communication networks - Fieldbus Specifications Part 6-27: Application layer
protocol specification - Type 27 elements
(IEC 61158-6-27:2023)
Industrielle Kommunikationsnetze - Feldbusse - Teil 6-27: Protokollspezifikation des
Application Layer (Anwendungsschicht) - Typ 27-Elemente (IEC 61158-6-27:2023)
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-27 :
Spécification du protocole de la couche application - Éléments de type 27 (IEC 61158-6-
27:2023)
Ta slovenski standard je istoveten z: EN IEC 61158-6-27:2023
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 IEC 61158-6-27

NORME EUROPÉENNE
EUROPÄISCHE NORM April 2023
ICS 25.040
English Version
Industrial communication networks - Fieldbus Specifications Part
6-27: Application layer protocol specification - Type 27 elements
(IEC 61158-6-27:2023)
Réseaux de communication industriels - Spécifications des Industrielle Kommunikationsnetze - Feldbusse - Teil 6-27:
bus de terrain - Partie 6-27 : Spécification du protocole de Protokollspezifikation des Application Layer
la couche application - Éléments de type 27 (Anwendungsschicht) - Typ 27-Elemente
(IEC 61158-6-27:2023) (IEC 61158-6-27:2023)
This European Standard was approved by CENELEC on 2023-04-20. 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,
Türkiye 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61158-6-27:2023 E

European foreword
The text of document 65C/1205/FDIS, future edition 1 of IEC 61158-6-27, 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-
27:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-01-20
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-04-20
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61158-6-27:2023 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 standard indicated:
IEC 61158-1:2023 NOTE Approved as EN IEC 61158-1:2023 (not modified)
IEC 61158-2 NOTE Approved as EN 61158-2
IEC 61158-6 (series) NOTE Approved as EN 61158-6 (series)
IEC 61784-1 (series) NOTE Approved as EN IEC 61784-1 (series)
IEC 61784-2 (series) NOTE Approved as EN IEC 61784-2 (series)

To be published. Stage at the time of publication: FprEN IEC 61784-1-X:2023.
To be published. Stage at the time of publication: FprEN IEC 61784-2-X:2023.
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 61158-5-27 2023 Industrial communication networks - EN IEC 61158-5-27 2023
Fieldbus specifications - Part 5-27:
Application layer service definition - Type
27 elements
ISO/IEC 646 - Information technology; ISO 7-bit coded - -
character set for information interchange
ISO/IEC 7498-1 - Information technology - Open Systems - -
Interconnection - Basic reference model:
The basic model
ISO/IEC 9545 - Information technology - Open Systems - -
Interconnection - Application layer
structure
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 19501 2005 Information technology - Open Distributed - -
Processing - Unified Modeling Language
(UML) Version 1.4.2
ISO/IEC/IEEE 60559 2020 Information technology - Microprocessor - -
Systems - Floating-Point arithmetic
ISO/IEC/IEEE 8802-3 - Telecommunications and exchange - -
between information technology systems –
Requirements for local and metropolitan
area networks – Part 3: 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
IEEE Std 802.1AB - IEEE Standard for Local and metropolitan - -
area networks: Station and Media Access
Control Connectivity Discovery
IEEE Std 802.1AS - IEEE standard for Local and metropolitan - -
area networks - Timing and
Synchronization for Time-Sensitive
Applications in Bridged Local Area
Networks
IETF RFC 768 1980 User Datagram Protocol - -
IETF RFC 791 1981 Internet Protocol - -
IETF RFC 826 1982 Ethernet Address Resolution Protocol: Or - -
Converting Network Protocol Addresses to
48.bit Ethernet Address for Transmission
on Ethernet Hardware
IETF RFC 1112 1989 Host Extensions for IP multicasting - -
IETF RFC 2460 1998 Internet Protocol - Version 6 (IPv6) - - -
Specification
IEC 61158-6-27 ®
Edition 1.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 6-27: Application layer protocol specification – Type 27 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 6-27: Spécification du protocole de la couche application – Éléments de
type 27
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040 ISBN 978-2-8322-6620-5
– 2 – IEC 61158-6-27:2023 © IEC 2023
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
1.1 General . 10
1.2 Specifications . 10
1.3 Conformance . 11
2 Normative references . 11
3 Terms, definitions, abbreviated terms, symbols and conventions . 12
3.1 Referenced terms and definitions . 12
3.1.1 Terms and definitions from ISO/IEC 7498-1 . 12
3.1.2 Terms and definitions from ISO/IEC 9545 . 12
3.1.3 Terms and definitions from ISO/IEC 8824-1 . 13
3.1.4 Terms and definitions from ISO/IEC 10731 . 13
3.1.5 Terms and definitions from ISO/IEC 19501 . 13
3.2 Additional terms and definitions . 13
3.3 Abbreviations and symbols . 22
3.4 Conventions . 24
3.4.1 General conventions . 24
3.4.2 PDU data type conventions . 24
3.4.3 State machine conventions . 24
4 Abstract syntax . 26
4.1 General . 26
4.2 Basic Data types . 27
4.3 FAL PDU types . 28
4.3.1 General . 28
4.3.2 Top of APDU types: _APDU . 31
4.3.3 PDUs for field system management service . 31
4.3.4 Detailed definitions of _FID-PDUs . 34
4.3.5 PDUs for field device control service . 48
4.3.6 PDUs for message service . 57
4.4 Detailed definitions of _FDCService-PDUs . 58
4.4.1 Enhanced PDU type . 58
4.5 Device profile . 72
5 Transfer syntax . 72
5.1 Concepts . 72
5.2 Encode rules . 73
5.2.1 INTEGER and its subtypes . 73
5.2.2 REAL type and its subtypes . 74
5.2.3 BIT STRING type . 76
5.2.4 OCTET STRING type and IA5String type . 77
5.2.5 NULL type . 77
5.2.6 Structure type and Array type . 77
6 Structure of FAL protocol state machine . 78
7 AP-context state machine (APC SM) . 80
7.1 Overview. 80
7.2 State descriptions . 81
...