Industrial communication networks - Fieldbus specifications - Part 6-19: Application layer protocol specification - Type 19 elements

IEC 61158-6-19:2019 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 2 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 specifies interactions between remote applications and defines the externally visible behavior provided by the Type 2 fieldbus application layer. The purpose of this document is to define the protocol provided to a) define the wire-representation of the service primitives defined in this document, and b) define the externally visible behavior associated with their transfer. This document specifies the protocol of the Type 2 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545). This fourth edition includes the following significant technical changes with respect to the previous edition: - improving the hotplug and redundancy features; - improving the phase switching and the error handling; - editorial improvements.

Industrielle Kommunikationsnetze - Feldbusse - Teil 6-19: Protokollspezifikation des Application Layer (Anwendungsschicht) - Typ 19-Elemente

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-19: Spécification du protocole de la couche application - Eléments de type 19

L’IEC 611586-19:2019 fournit des éléments communs pour les communications de messagerie prioritaires et non prioritaires élémentaires entre les programmes d’application des environnements d’automatisation et le matériel spécifique au bus de terrain de type 19. On utilise le terme "prioritaire" pour traduire la présence d’une fenêtre temporelle, à l’intérieur de laquelle il est exigé qu’une ou plusieurs actions spécifiées soient terminées avec un niveau de certitude défini. Si les actions spécifiées ne sont pas réalisées dans la fenêtre temporelle, les applications demandant les actions risquent de connaître une défaillance, avec les risques que cela comporte pour les équipements, les installations et éventuellement la vie humaine. La présente norme définit de manière abstraite le service, visible par un observateur externe, assuré par les différents Types de la couche Application de bus de terrain, en termes a) de modèle abstrait visant à la définition des ressources d’application (objets) qui peuvent être manipulées par des utilisateurs utilisant un service FAL; b) d’événements et d’actions liés aux primitives du service; c) de paramètres associés à chaque événement et action de primitive, ainsi que de forme prise par ces paramètres; et d) d’interaction entre ces événements et ces actions, ainsi que de séquences valides desdits événements et actions. Le but du présent document est de définir les services fournis à: a) l’utilisateur de FAL à la frontière entre l’utilisateur et la Couche application du Modèle de référence de bus de terrain; et b) la Gestion des systèmes au niveau de la frontière entre la Couche application et la Gestion des systèmes selon le Modèle de référence de bus de terrain.

Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-19. del: Specifikacija protokola na aplikacijski ravni - Elementi tipa 19 (IEC 61158-6-19:2019)

Ta dokument določa skupne elemente za osnovne časovno kritične in časovno nekritične sporočilne komunikacije med aplikacijami v avtomatizacijskem okolju ter materialu, specifičnem za procesna vodila tipa 19. 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 zunanje vidno opravilo, ki ga zagotavljajo različni tipi aplikacijskih nivojev procesnih vodil v zvezi s/z: a) abstraktnim modelom za določanje aplikacijskih virov (objektov), ki jih uporabniki lahko spreminjajo prek opravila aplikacijskega nivoja procesnih vodil; b) primitivnimi dejanji in dogodki opravila; c) parametri, povezanimi z vsakim primitivnim dejanjem in dogodkom, kot tudi obliko, ki jo prevzamejo; ter d) medsebojno povezavo med temi dejanji in dogodki ter njihovimi veljavnimi zaporedji. Namen tega dokumenta je opredeliti opravila, ki se zagotavljajo za: a) uporabnika aplikacijskega nivoja procesnih vodil na meji med uporabnikom in aplikacijskim nivojem referenčnega modela procesnih vodil ter b) upravljanje sistemov na meji med aplikacijskim nivojem in upravljanje sistemov referenčnega modela procesnih vodil. Ta dokument določa strukturo in opravila aplikacijskega nivoja procesnih vodil IEC v skladu z osnovnim referenčnim modelom OSI (ISO/IEC 7498) ter strukturo aplikacijskega nivoja OSI (ISO/IEC 9545). Opravila in protokole aplikacijskega nivoja procesnih vodil zagotavljajo aplikacijski osebki (AE) aplikacijskega nivoja procesnih vodil znotraj aplikacijskih procesov. Aplikacijski osebek aplikacijskega nivoja procesnih vodil sestavljata sklop objektno usmerjenih aplikacijskih opravilnih elementov (ASE) in osebek za upravljanje nivojev (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 aplikacijskega nivoja procesnih vodil spada aplikacijski opravilni element za upravljanje, ki zagotavlja skupen sklop opravil za upravljanje primerkov razredov aplikacijskega nivoja 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 uporabnikom aplikacijskega nivoja procesnih vodil omogoči večja prilagodljivost pri standardizaciji takega vedenja objektov. Poleg teh opravil so v tem dokumentu opredeljena tudi nekatera podporna opravila, da se omogoči dostop do aplikacijskega nivoja procesnih vodil za nadzorovanje nekaterih vidikov njegovega delovanja.

General Information

Status
Published
Publication Date
22-Aug-2019
Technical Committee
Drafting Committee
Current Stage
6060 - Document made available
Due Date
23-Aug-2019
Completion Date
23-Aug-2019

RELATIONS

Buy Standard

Standard
EN IEC 61158-6-19:2019
English language
26 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN IEC 61158-6-19:2019
01-november-2019
Nadomešča:
SIST EN 61158-6-19:2015

Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 6-19. del:

Specifikacija protokola na aplikacijski ravni - Elementi tipa 19 (IEC 61158-6-
19:2019)

Industrial communication networks - Fieldbus specifications - Part 6-19: Application layer

protocol specification - Type 19 elements (IEC 61158-6-19:2019)

Industrielle Kommunikationsnetze - Feldbusse - Teil 6-19: Protokollspezifikation des

Application Layer (Anwendungsschicht) - Typ 19-Elemente (IEC 61158-6-19:2019)

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-19:

Spécification du protocole de la couche application - Eléments de type 19 (IEC 61158-6-

19:2019)
Ta slovenski standard je istoveten z: EN IEC 61158-6-19:2019
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 61158-6-19:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61158-6-19:2019
---------------------- Page: 2 ----------------------
SIST EN IEC 61158-6-19:2019
EUROPEAN STANDARD EN IEC 61158-6-19
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2019
ICS 25.040.40; 35.100.70; 35.110 Supersedes EN 61158-6-19:2014 and all of its
amendments and corrigenda (if any)
English Version
Industrial communication networks - Fieldbus specifications -
Part 6-19: Application layer protocol specification - Type 19
elements
(IEC 61158-6-19:2019)

Réseaux de communication industriels - Spécifications des Industrielle Kommunikationsnetze - Feldbusse - Teil 6-19:

bus de terrain - Partie 6-19: Spécification du protocole de la Protokollspezifikation des Application Layer

couche application - Eléments de type 19 (Anwendungsschicht) - Typ 19-Elemente
(IEC 61158-6-19:2019) (IEC 61158-6-19:2019)

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 61158-6-19:2019 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61158-6-19:2019
EN IEC 61158-6-19:2019 (E)
European foreword

The text of document 65C/948/FDIS, future edition 4 of IEC 61158-6-19, 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-

19:2019.
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 61158-6-19:2014 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 61158-6-19:2019 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 61131 (series) NOTE Harmonized as EN 61131 (series)
IEC 61158-1 NOTE Harmonized as EN IEC 61158-1
IEC 61158-4-16 NOTE Harmonized as EN 61158-4-16
IEC 61784-1 NOTE Harmonized as EN IEC 61784-1
IEC 61784-2 NOTE Harmonized as EN IEC 61784-2
IEC 61800 (series) NOTE Harmonized as EN 61800 (series)
---------------------- Page: 4 ----------------------
SIST EN IEC 61158-6-19:2019
EN IEC 61158-6-19:2019 (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 61158-3-19 2019 Industrial communication networks - Fieldbus EN IEC 61158-3-19 2019

specifications - Part 3-19: Data-link layer
service definition - Type 19 elements

IEC 61158-4-19 2019 Industrial communication networks - Fieldbus EN IEC 61158-4-19 2019

specifications - Part 4 -19: Data-link layer
protocol specification - Type 19 elements

IEC 61158-5-19 2019 Industrial communication networks - Fieldbus EN IEC 61158-5-19 2019

specifications - Part 5-19: Application layer
service definition - Type 19 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 10731 - Information technology - Open Systems - -
Interconnection - Basic Reference Model -
Conventions for the definition of OSI services
---------------------- Page: 5 ----------------------
SIST EN IEC 61158-6-19:2019
---------------------- Page: 6 ----------------------
SIST EN IEC 61158-6-19:2019
IEC 61158-6-19
Edition 4.0 2019-06
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-19: Application layer protocol specification – Type 19 elements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-7012-7

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

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 7 ----------------------
SIST EN IEC 61158-6-19:2019
– 2 – IEC 61158-6-19:2019 © IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

1.1 General ................................................................................................................... 7

1.2 Specifications ......................................................................................................... 8

1.3 Conformance .......................................................................................................... 8

2 Normative references ...................................................................................................... 8

3 Terms, definitions, symbols, abbreviations and conventions ............................................ 9

3.1 Referenced terms and definitions ............................................................................ 9

3.1.1 ISO/IEC 7498-1 terms ...................................................................................... 9

3.1.2 ISO/IEC 8822 terms ......................................................................................... 9

3.1.3 ISO/IEC 9545 terms ......................................................................................... 9

3.1.4 ISO/IEC 8824-1 terms ...................................................................................... 9

3.1.5 Fieldbus Data Link Layer terms ..................................................................... 10

3.2 Additional terms and definitions ............................................................................ 10

3.3 Additional abbreviations and symbols ................................................................... 11

3.4 Conventions .......................................................................................................... 12

4 Abstract syntax .............................................................................................................. 12

5 Transfer syntax .............................................................................................................. 12

5.1 Introduction ........................................................................................................... 12

5.2 RTC PDU merged abstract and transfer syntax ..................................................... 12

6 Structure of FAL protocol state machines ...................................................................... 12

7 AP-context state machine .............................................................................................. 14

7.1 Overview............................................................................................................... 14

7.2 States ................................................................................................................... 14

7.2.1 Idle ................................................................................................................ 14

7.2.2 Running ......................................................................................................... 14

7.3 States, events and transitions ............................................................................... 15

8 FAL service protocol machine (FSPM) ........................................................................... 15

8.1 Overview............................................................................................................... 15

8.2 MGT services ........................................................................................................ 15

8.2.1 Get network status ......................................................................................... 15

8.2.2 Get device status ........................................................................................... 15

8.2.3 Network status change report ........................................................................ 15

8.2.4 Device status change report .......................................................................... 15

8.2.5 Set device status ........................................................................................... 15

8.2.6 Enable RTC ................................................................................................... 15

8.2.7 Enable hot-plug ............................................................................................. 16

8.2.8 Notify RTC ..................................................................................................... 16

8.2.9 Disable RTC .................................................................................................. 16

8.2.10 Notify error .................................................................................................... 16

8.3 IDN services ......................................................................................................... 16

8.3.1 Read ............................................................................................................. 16

8.3.2 Write.............................................................................................................. 16

8.4 CYCIDN services .................................................................................................. 16

8.4.1 Read_cyclic ................................................................................................... 16

---------------------- Page: 8 ----------------------
SIST EN IEC 61158-6-19:2019
IEC 61158-6-19:2019 © IEC 2019 – 3 –

8.4.2 Write_cyclic ................................................................................................... 16

8.4.3 Notify_cyclic .................................................................................................. 16

9 Application relationship protocol machine (ARPM) ......................................................... 16

9.1 Overview............................................................................................................... 16

9.2 Master ARPM ........................................................................................................ 17

9.2.1 Overview ....................................................................................................... 17

9.2.2 State descriptions .......................................................................................... 17

9.2.3 States, events and transitions ........................................................................ 18

9.3 Slave ARPM ......................................................................................................... 18

9.3.1 Overview ....................................................................................................... 18

9.3.2 State descriptions .......................................................................................... 18

9.3.3 States, events and transitions ........................................................................ 19

9.4 Primitives received from the FSPM ....................................................................... 19

9.4.1 FSP-get network status.................................................................................. 19

9.4.2 FSP-get device status .................................................................................... 19

9.4.3 FSP-set device status .................................................................................... 19

9.4.4 FSP-enable RTC ........................................................................................... 20

9.4.5 FSP-enable Hot-plug ..................................................................................... 20

9.4.6 FSP-disable RTC ........................................................................................... 20

9.4.7 FSP-read ....................................................................................................... 20

9.4.8 FSP-write ...................................................................................................... 20

9.4.9 FSP-read_cyclic ............................................................................................ 20

9.4.10 FSP-write_cyclic ............................................................................................ 20

9.5 Indications received from the DMPM ..................................................................... 21

9.5.1 ARP-network status change report................................................................. 21

9.5.2 ARP-device status change report ................................................................... 21

9.5.3 ARP-notify RTC enabled ................................................................................ 21

9.5.4 ARP-notify RTC disabled ............................................................................... 21

9.5.5 ARP-notify_cyclic........................................................................................... 21

9.5.6 ARP-notify Error ............................................................................................ 21

10 DLL mapping protocol machine (DMPM) ........................................................................ 21

10.1 Overview............................................................................................................... 21

10.2 Primitives received from the ARPM ....................................................................... 22

10.3 Indications received from the DL ........................................................................... 22

Bibliography .......................................................................................................................... 23

Figure 1 – Relationships among protocol machines and adjacent layers ............................... 13

Figure 2 – APCSM state diagram .......................................................................................... 14

Figure 3 – ARPM master AR state diagram ........................................................................... 17

Figure 4 – ARPM slave AR state diagram ............................................................................. 18

Table 1 – RTC PDU attribute format...................................................................................... 12

Table 2 – APCSM state-event table ...................................................................................... 15

Table 3 – Master ARPM state-event table ............................................................................. 18

Table 4 – Slave ARPM state-event table ............................................................................... 19

Table 5 – ARPM to DL mapping ............................................................................................ 22

Table 6 – DL to ARPM mapping ............................................................................................ 22

---------------------- Page: 9 ----------------------
SIST EN IEC 61158-6-19:2019
– 4 – IEC 61158-6-19:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 6-19: Application layer protocol specification –
Type 19 elements
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

Attention is drawn to the fact that the use of the associated protocol type is restricted by its

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 layer protocol type to

be used with other layer protocols of the same type, or in other type combinations explicitly

authorized by its intellectual-property-right holders.

NOTE Combinations of protocol types are specified in IEC 61784-1 and IEC 61784-2.

International Standard IEC 61158-6-19 has been prepared by subcommittee 65C: Industrial

networks, of IEC technical committee 65: Industrial-process measurement, control and

automation.

This fourth edition cancels and replaces the third edition published in 2014. This edition

constitutes a technical revision.
---------------------- Page: 10 ----------------------
SIST EN IEC 61158-6-19:2019
IEC 61158-6-19:2019 © IEC 2019 – 5 –

This edition includes the following significant technical changes with respect to the previous

edition:
• improving the hotplug and redundancy features;
• improving the phase switching and the error handling;
• editorial improvements.
The text of this International Standard is based on the following documents:
FDIS Report on voting
65C/948/FDIS 65C/956/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.
This publication has been drafted in accordance with ISO/IEC Directives, Part 2.

A list of all parts of the IEC 61158 series, published under the general title Industrial

communication networks – Fieldbus specifications, can be found on the IEC web site.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
---------------------- Page: 11 ----------------------
SIST EN IEC 61158-6-19:2019
– 6 – IEC 61158-6-19:2019 © IEC 2019
INTRODUCTION

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.

The application protocol provides the application service by making use of the services

available from the data-link or other immediately lower layer. The primary aim of this

document is to provide a set of rules for communication expressed in terms of the procedures

to be carried out by peer application entities (AEs) at the time of communication. These rules

for communication are intended to provide a sound basis for development in order to serve a

variety of purposes:
• as a guide for implementors and designers;
• for use in the testing and procurement of equipment;

• as part of an agreement for the admittance of systems into the open systems environment;

• as a refinement to the understanding of time-critical communications within OSI.

This document is concerned, in particular, with 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.
---------------------- Page: 12 ----------------------
SIST EN IEC 61158-6-19:2019
IEC 61158-6-19:2019 © IEC 2019 – 7 –
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 6-19: Application layer protocol specification –
Type 19 elements
1 Scope
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 19 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 document 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 document specifies the structure and services of the IEC fieldbus Application Layer, in

conformance with the OSI Basic Reference Model (ISO/IEC 7498) 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

---------------------- Page: 13 ----------------------
SIST EN IEC 61158-6-19:2019
– 8 – IEC 61158-6-19:2019 © IEC 2019

send/receive is specified. This permits greater flexibility to the FAL users in standardizing

such object behavior. In addition to these services, some supporting services are also defined

in this document to provide access to the FAL to control certain aspects of its operation.

1.2 Specificati
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.