EN IEC 61784-3:2021/A1:2024
(Amendment)Industrial communication networks - Profiles - Part 3: Functional safety fieldbuses - General rules and profile definitions
Industrial communication networks - Profiles - Part 3: Functional safety fieldbuses - General rules and profile definitions
Industrielle Kommunikationsnetze - Profile - Teil 3: Funktional sichere Übertragung bei Feldbussen - Allgemeine Regeln und Festlegungen für Profile
Réseaux de communication industriels - Profils - Partie 3 : Bus de terrain de sécurité fonctionnelle - Règles générales et définitions de profils
Industrijska komunikacijska omrežja - Profili - 3. del: Funkciijska varnost procesnih vodil - Splošna pravila in definicije profilov - Dopolnilo 1 (IEC 61784-3:2021/AMD1:2024)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2024
Industrijska komunikacijska omrežja - Profili - 3. del: Funkciijska varnost
procesnih vodil - Splošna pravila in definicije profilov - Dopolnilo 1 (IEC 61784-
3:2021/AMD1:2024)
Industrial communication networks - Profiles - Part 3: Functional safety fieldbuses -
General rules and profile definitions - Amendment 1 (IEC 61784-3:2021/AMD1:2024)
Industrielle Kommunikationsnetze - Profile - Teil 3: Funktional sichere Übertragung bei
Feldbussen - Allgemeine Regeln und Festlegungen für Profile (IEC 61784-
3:2021/AMD1:2024)
Amendement 1 - Réseaux de communication industriels - Profils - Partie 3: Bus de
terrain de sécurité fonctionnelle - Règles générales et définitions de profils (IEC 61784-
3:2021/AMD1:2024)
Ta slovenski standard je istoveten z: EN IEC 61784-3:2021/A1:2024
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.05 Večslojne uporabniške Multilayer applications
rešitve
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61784-3:2021/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2024
ICS 25.040.40; 35.100.05
English Version
Industrial communication networks - Profiles - Part 3: Functional
safety fieldbuses - General rules and profile definitions
(IEC 61784-3:2021/AMD1:2024)
Réseaux de communication industriels - Profils - Partie 3 : Industrielle Kommunikationsnetze - Profile - Teil 3:
Bus de terrain de sécurité fonctionnelle - Règles générales Funktional sichere Übertragung bei Feldbussen -
et définitions de profils Allgemeine Regeln und Festlegungen für Profile
(IEC 61784-3:2021/AMD1:2024) (IEC 61784-3:2021/AMD1:2024)
This amendment A1 modifies the European Standard EN IEC 61784-3:2021; it was approved by CENELEC on 2024-05-24. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment 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 amendment 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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61784-3:2021/A1:2024 E
European foreword
The text of document 65C/1284/FDIS, future IEC 61784-3/AMD1, 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 61784-3:2021/A1:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-02-24
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-05-24
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 61784-3:2021/AMD1:2024 was approved by CENELEC as
a European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 62061:2021 NOTE Approved as EN IEC 62061:2021 (not modified)
IEC 61784-3 ®
Edition 4.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Industrial communication networks – Profiles –
Part 3: Functional safety fieldbuses – General rules and profile definitions
Réseaux de communication industriels – Profils –
Partie 3 : Bus de terrain de sécurité fonctionnelle – Règles générales et
définitions de profils
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40, 35.100.05 ISBN978-2-8322-8279-3
– 2 – IEC 61784-3:2021/AMD1:2024
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
PROFILES –
Part 3: Functional safety fieldbuses –
General rules and profile definitions
AMENDMENT 1
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 61784-3:2021 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial-process measurement, control and
automation.
IEC 61784-3:2021/AMD1:2024 – 3 –
© IEC 2024
The text of this Amendment is based on the following documents:
Draft Report on voting
65C/1284/FDIS 65C/1291/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
A list of all parts of the IEC 61784-3 series, published under the general title Industrial
communication networks – Profiles – Functional safety fieldbuses, can be found on the IEC
website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
_____________
INTRODUCTION to Amendment 1
This Amendment 1 discusses the concepts of a comprehensive channel model for data integrity
calculations for functional safety communications protocols (FSCPs) as specified in
IEC 61784-3:2021. The comprehensive channel model addresses data corruption error types
where multiple contiguous bits are affected by a single fault.
It also reviews typical relationships between the possible errors and the various safety
measures which can be implemented.
– 4 – IEC 61784-3:2021/AMD1:2024
© IEC 2024
3 Terms, definitions, symbols, abbreviated terms and conventions
3.1 Terms and definitions
Add the following new term and definition:
3.1.55
uniformly distributed segment
UDS
segment of a message consisting of contiguous bits within which error patterns are uniformly
distributed
3.2 Symbols and abbreviated terms
3.2.1 Abbreviated terms
Add, at the end of the list, the following new abbreviated term:
UDS uniformly distributed segment
5.4.1 General
Replace, at the beginning of the sentence, "5.4.9" with "5.4.8".
5.4.9 Different data integrity assurance systems
Delete this subclause.
5.5 Typical relationships between errors and safety measures
Replace, at the beginning of the second paragraph, "Actual protection of a measure against
errors" with "The effectiveness of a measure against errors".
Table 1 − Overview of the effectiveness of the various measures on the possible errors
Replace Table 1 (both title and contents) with the following new title and table:
IEC 61784-3:2021/AMD1:2024 – 5 –
© IEC 2024
Table 1 – Typical relationships between errors and safety measures
Safety measures
Communication errors
Corruption
d
X X
X
(see 5.3.2)
Unintended repetition
X X
(see 5.3.3)
Incorrect sequence
X X
(see 5.3.4)
Loss
X X
(see 5.3.5)
Unacceptable delay
b
X X
(see 5.3.6)
Insertion
e e a
X X X X
(see 5.3.7)
Masquerade
d
X X X X X X
(see 5.3.8)
Addressing
X
(see 5.3.9)
NOTE Table adapted from IEC 62280:2014, Table 1.
a
Only for sender identification. Detects only insertion of an invalid source.
b
Required in all cases.
c
Void
d
Effective only if feedback message includes original data or information about the original data, and if the
receiver only acts on the data after acknowledging of the feedback message.
e
Effective only if the sequence numbers or time stamps of the source entities are different.
5.8.5.2.5 Contribution of masquerade errors (RR )
M
Add, at the end of the first paragraph, the following new sentence:
This Equation (3) assumes the SPDU structure differs from the structure of non-safety PDUs in
terms of location of the fields of uniqueness.
5.8.6.3 Residual error probability for data integrity RP
I
Add, at the end of the subclause, the following new note:
NOTE Annex I complements Annex B by providing a comprehensive data integrity model using CRC-based error
checking.
Sequence number
(see 5.4.2)
Time stamp
(see 5.4.3)
Time expectation
(see 5.4.4)
Connection
authentication
(see 5.4.5)
Feedback message
(see 5.4.6)
Data integrity
assurance
(see 5.4.7)
Redundancy with
cross checking
(see 5.4.8)
– 6 – IEC 61784-3:2021/AMD1:2024
© IEC 2024
5.8.12.1 General
Re
...
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