Amendment 2 - Industrial communication networks - Profiles - Part 3-18: Functional safety fieldbuses - Additional specifications for CPF 18

Amendement 2 - Réseaux de communication industriels - Profils - Partie 3-18: Bus de terrain de sécurité fonctionnelle - Spécifications supplémentaires pour CPF 18

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Status
Published
Publication Date
29-Apr-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
30-Apr-2021
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IEC 61784-3-18
Edition 1.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 2
AM ENDEMENT 2
Industrial communication networks – Profiles –
Part 3-18: Functional safety fieldbuses – Additional specifications for CPF 18
Réseaux de communication industriels – Profils –
Partie 3-18: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 18
IEC 61784-3-18:2011-04/AMD2:2021-04(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61784-3-18
Edition 1.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 2
AM ENDEMENT 2
Industrial communication networks – Profiles –
Part 3-18: Functional safety fieldbuses – Additional specifications for CPF 18
Réseaux de communication industriels – Profils –
Partie 3-18: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 18
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-9757-5

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61784-3-18:2011/AMD2:2021
© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
PROFILES –
Part 3-18: Functional safety fieldbuses –
Additional specifications for CPF 18
AMENDMENT 2
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

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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

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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.

Amendment 2 to IEC 61784-3-18:2011 has been prepared by subcommittee 65C: Industrial

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

automation.
---------------------- Page: 4 ----------------------
IEC 61784-3-18:2011/AMD2:2021 – 3 –
© IEC 2021
The text of this Amendment is based on the following documents:
FDIS Report on voting
65C/1083/FDIS 65C/1087/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 International Standard 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/standardsdev/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 "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it

colours which are considered to be useful for the correct understanding of its
contains
contents. Users should therefore print this document using a colour printer.
_____________
INTRODUCTION to Amendment 2

This Amendment 2 introduces several editorial and informational corrections in the context of

Edition 4 of IEC 61784-3.
---------------------- Page: 5 ----------------------
– 4 – IEC 61784-3-18:2011/AMD2:2021
© IEC 2021
0 Introduction
0.1 General
Replace the existing Figure 1 by the following new figure:

Replace the existing text of the NOTE below Figure 1 (before the title) by the following:

IEC 62061 specifies the relationship between PL (Category) and SIL.
---------------------- Page: 6 ----------------------
IEC 61784-3-18:2011/AMD2:2021 – 5 –
© IEC 2021
Replace the existing Figure 2 by the following new figure:

Replace, below Figure 2, the existing text of figure footnote a by the following:

For specified electromagnetic environments; otherwise IEC 61326-3-1 or IEC 61000-6-7.

Delete, below Figure 2, figure footnote b.
5 General
5.1 External documents providing specifications for the profile
Replace the existing text by the following:
There is no additional external document used for FSCP 18/1.
7 Safety communication layer protocol
7.1.2.4 Safety data
Delete, at the end of second paragraph: "as proven in 9.5.2".
7.1.2.7 SPDO CRC
Replace, in second paragraph: "0x20044009" with "0x120044009".
---------------------- Page: 7 ----------------------
– 6 – IEC 61784-3-18:2011/AMD2:2021
© IEC 2021
Replace, at the end of second paragraph: "9.5.2" with "Clause A.1".
7.1.3.8 SHB CRC
Replace, in second paragraph: "0x20044009" with "0x120044009".
Replace, at the end of second paragraph: "9.5.2" with "Clause A.1".
9 System requirements
9.5 Constraints for calculation of system characteristics
Delete Subclause 9.5.2.
Annex A – Additional information for functional safety communication profiles
of CPF 18
Delete the sentence: "There is no additional information for this FSCP. "
Add the following new Clauses A.1 and A.2.
A.1 Hash function calculation
The 32-bit CRC used in this FSCP is 0x120044009. It is calculated by:
G(x) = x32 + x29 + x18 + x14 + x3 + 1

Table A.1 contains the residual error probabilities for the used 32-bit polynomial for different

code length and bit error probabilities in the range of 120 bits up to data lengths of 1 024 bits

(128 octets) as specified in 9.5.1.4 including the CRC signature and incorporating the overall

safety PDU structure as described in 7.1.
Table A.1 – Residual error probabilities for CRC32 Polynomial 0x120044009
Length P = 0,000 1 P = 0,001 P = 0,01 P = 2/n P = 4/n P = 8/n
BER BER BER BER BER BER
n (bits)
(2/n < 0,01) (4/n < 0,01) (8/n < 0,01)
120 1,4236765E-22 1,2847875E-16 4,5824514E-11 - - -
128 1,5805978E-22 1,4161637E-16 4,6991099E-11 - - -
136 1,8162338E-22 1,6156082E-16 4,9874896E-11 - - -
144 2,0514920E-22 1,8117854E-16 5,2040784E-11 - - -
152 2,2863728E-22 2,0047350E-16 5,3582492E-11 - - -
160 2,5208766E-22 2,1944972E-16 5,4586144E-11 - - -
168 2,7550040E-22 2,3811128E-16 5,5130780E-11 - - -
176 2,9887554E-22 2,5646232E-16 5,5287180E-11 - - -
184 3,2221313E-22 2,7450668E-16 5,5112762E-11 - - -
192 3,4551322E-22 2,9224828E-16 5,4660017E-11 - - -
200 3,6877585E-22 3,0969120E-16 5,3978908E-11 - - -
208 3,9200108E-22 3,2683958E-16 5,3114126E-11 4,5363410E-11 - -
216 4,1518896E-22 3,4369773E-16 5,2107322E-11 3,8340651E-11 - -
---------------------- Page: 8 ----------------------
IEC 61784-3-18:2011/AMD2:2021 – 7 –
© IEC 2021
Length P = 0,000 1 P = 0,001 P = 0,01 P = 2/n P = 4/n P = 8/n
BER BER BER BER BER BER
n (bits)
(2/n < 0,01) (4/n < 0,01) (8/n < 0,01)
224 4,3833955E-22 3,6026990E-16 5,0993464E-11 3,2582177E-11 - -
232 4,6145289E-22 3,7656011E-16 4,9799302E-11 2,7831581E-11 - -
240 4,8452904E-22 3,9257249E-16 4,8549670E-11 2,3890359E-11 - -
248 5,1342460E-22 4,1302103E-16 4,7793792E-11 2,0835782E-11 - -
256 5,4812557E-22 4,3779805E-16 4,7436262E-11 1,8425386E-11 - -
264 6,0226140E-22 4,7761306E-16 4,8446976E-11 1,6861505E-11 - -
272 6,5631043E-22 5,1677587E-16 4,9125798E-11 1,5393430E-11 - -
280 7,1027278E-22 5,5529640E-16 4,9531005E-11 1,4033750E-11 - -
288 7,6609297E-22 5,9469202E-16 4,9823553E-11 1,2816366E-11 - -
296 8,4708043E-22 6,5289301E-16 5,1327670E-11 1,2045553E-11 - -
304 9,4735087E-22 7,2499111E-16 5,3455513E-11 1,1495922E-11 - -
312 1,0629785E-21 8,0770133E-16 5,5857692E-11 1,1051648E-11 - -
320 1,1997408E-21 9,0514335E-16 5,8700560E-11 1,0726971E-11 - -
328 1,3556504E-21 1,0155031E-15 6,1761475E-11 1,0461785E-11 - -
336 1,5635573E-21 1,1628976E-15 6,6182448E-11 1,0442536E-11 - -
344 1,7865996E-21 1,3193279E-15 7,0326876E-11 1,0364686E-11 - -
352 2,0208766E-21 1,4817260E-15 7,4063469E-11 1,0220115E-11 - -
360 2,2682916E-21 1,6513297E-15 7,7479396E-11 1,0033566E-11 - -
368 2,5596749E-21 1,8502188E-15 8,1427739E-11 9,9296272E-12 - -
376 2,8756472E-21 2,0638556E-15 8,5243247E-11 9,8117258E-12 - -
384 3,2257781E-21 2,2987099E-15 8,9120472E-11 9,7068404E-12 - -
392 3,6215308E-21 2,5623985E-15 9,3232281E-11 9,6349408E-12 - -
400 4,0474134E-21 2,8434089E-15 9,7154398E-11 9,5450782E-12 9,7154463E-11 -
408 4,4841413E-21 3,1279116E-15 1,0051444E-10 9,3994061E-12 9,5832532E-11 -
416 4,9854381E-21 3,4529390E-15 1,0429003E-10 9,3077961E-12 9,4989209E-11 -
424 5,5396395E-21 3,8095810E-15 1,0814832E-10 9,2317820E-12 9,4283299E-11 -
432 6,1408682E-21 4,1931171E-15 1,1192889E-10 9,1545167E-12 9,3568240E-11 -
440 6,7985857E-21 4,6093325E-15 1,1572055E-10 9,0848438E-12 9,2923099E-11 -
448 7,5413586E-21 5,0766681E-15 1,1981327E-10 9,0497343E-12 9,2585427E-11 -
456 8,4186936E-21 5,6269908E-15 1,2464279E-10 9,0864545E-12 9,2881442E-11 -
464 9,3882365E-21 6,2304218E-15 1,2953135E-10 9,1304457E-12 9,3242112E-11 -
472 1,0453583E-20 6,8881152E-15 1,3441887E-10 9,1770946E-12 9,3626526E-11 -
480 1,1633575E-20 7,6111313E-15 1,3939755E-10 9,2345837E-12 9,4106788E-11 -
488 1,2863137E-20 8,3558251E-15 1,4382888E-10 9,2499280E-12 9,4218577E-11 -
496 1,4138339E-20 9,1191171E-15 1,4772488E-10 9,2271096E-12 9,3995500E-11 -
504 1,5508543E-20 9,9320460E-15 1,5148383E-10 9,2003769E-12 9,3738785E-11 -
512 1,6943099E-20 1,0774025E-14 1,5487542E-10 9,1517955E-12 9,3292441E-11 -
520 1,8445650E-20 1,1646634E-14 1,5794572E-10 9,0859281E-12 9,2696011E-11 -
528 2,0038809E-20 1,2563251E-14 1,6083659E-10 9,0145834E-12 9,2053257E-11 -
536 2,1716667E-20 1,3519161E-14 1,6350334E-10 8,9348614E-12 9,1336910E-11 -
544 2,3528296E-20 1,4543648E-14 1,6618275E-10 8,8648100E-12 9,0704765E-11 -
552 2,5463901E-20 1,5629140E-14 1,6878262E-10 8,7973089E-12 9,0095698E-11 -
560 2,7508047E-20 1,6764851E-14 1,7122196E-10 8,7256222E-12 8,9450634E-11 -
---------------------- Page: 9 ----------------------
– 8 – IEC 61784-3-18:2011/AMD2:2021
© IEC 2021
Length P = 0,000 1 P = 0,001 P = 0,01 P = 2/n P = 4/n P = 8/n
BER BER BER BER BER BER
n (bits)
(2/n < 0,01) (4/n < 0,01) (8/n < 0,01)
568 2,9662361E-20 1,7950558E-14 1,7349764E-10 8,6497338E-12 8,8770222E-11 -
576 3,1941688E-20 1,9193948E-14 1,7565753E-10 8,5731468E-12 8,8083883E-11 -
584 3,4391030E-20 2,0520402E-14 1,7783777E-10 8,5055102E-12 8,7477956E-11 -
592 3,7057131E-20 2,1955572E-14 1,8013261E-10 8,4538034E-12 8,7011456E-11 -
600 3,9903657E-20 2,3475690E-14 1,8237918E-10 8,4059524E-12 8,6578391E-11 -
608 4,2982901E-20 2,5109187E-14 1,8468353E-10 8,3695132E-12 8,6244617E-11 -
616 4,6279247E-20 2,6844449E-14 1,8696122E-10 8,3380158E-12 8,5955406E-11 -
624 4,9820371E-20 2,8694975E-14 1,8923972E-10 8,3134178E-12 8,5727711E-11 -
632 5,3590654E-20 3,0649202E-14 1,9144892E-10 8,2905610E-12 8,5515777E-11 -
640 5,7516332E-20 3,2663032E-14 1,9343615E-10 8,2576655E-12 8,5215707E-11 -
648 6,1673927E-20 3,4777895E-14 1,9534408E-10 8,2252391E-12 8,4921706E-11 -
656 6,6062878E-20 3,6991091E-14 1,9715750E-10 8,1919705E-12 8,4620212E-11 -
664 7,0637681E-20 3,9275117E-14 1,9880110E-10 8,1519464E-12 8,4260023E-11 -
672 7,5386656E-20 4,1621796E-14 2,0026705E-10 8,1043182E-12 8,3834377E-11 -
680 8,0356121E-20 4,4054787E-14 2,0162600E-10 8,0541279E-12 8,3386566E-11 -
688 8,5635210E-20 4,6620222E-14 2,0297999E-10 8,0090201E-12 8,2984111E-11 -
696 9,1165308E-20 4,9283501E-14 2,0424453E-10 7,9623964E-12 8,2568620E-11 -
704 9,7031602E-20 5,2087692E-14 2,0550110E-10 7,9204218E-12 8,2193635E-11 -
712 1,0333205E-19 5,5081361E-14 2,0681774E-10 7,8885969E-12 8,1907076E-11 -
720 1,1000416E-19 5,8227282E-14 2,0810912E-10 7,8600426E-12 8,1649426E-11 -
728 1,1711772E-19 6,1558301E-14 2,0941199E-10 7,8377961E-12 8,1447514E-11 -
736 1,2455641E-19 6,5009818E-14 2,1062129E-10 7,8129943E-12 8,1224133E-11 -
744 1,3232872E-19 6,8583268E-14 2,1174313E-10 7,7857987E-12 8,0979233E-11 -
752 1,4052665E-19 7,2322660E-14 2,1283238E-10 7,7607231E-12 8,0754068E-11 -
760 1,4911393E-19 7,6205658E-14 2,1385825E-10 7,7349134E-12 8,0521981E-11 -
768 1,5805440E-19 8,0210571E-14 2,1479807E-10 7,7061501E-12 8,0264808E-11 -
776 1,6741016E-19 8,4365416E-14 2,1568363E-10 7,6770096E-12 8,0003402E-11 -
784 1,7725792E-19 8,8704625E-14 2,1654574E-10 7,6500994E-12 7,9762003E-11 -
792 1,8761682E-19 9,3233243E-14 2,1738322E-10 7,6251985E-12 7,9540042E-11 -

800 1,9851887E-19 9,7962401E-14 2,1819883E-10 7,6025501E-12 7,9336307E-11 2,1819883E-10

808 2,0987600E-19 1,0284454E-13 2,1895363E-10 7,5782009E-12 7,9118288E-11 2,1793283E-10

816 2,2176826E-19 1,0791450E-13 2,1967425E-10 7,5544679E-12 7,8905614E-11 2,1767439E-10

824 2,3419250E-19 1,1316622E-13 2,2035471E-10 7,5306262E-12 7,8692731E-11 2,1741553E-10

832 2,4726160E-19 1,1864890E-13 2,2102202E-10 7,5094219E-12 7,8502470E-11 2,1718358E-10

840 2,6084704E-19 1,2429641E-13 2,2163585E-10 7,4864440E-12 7,8297015E-11 2,1693343E-10

848 2,7496962E-19 1,3011436E-13 2,2220228E-10 7,4620265E-12 7,8080191E-11 2,1666866E-10

856 2,8958763E-19 1,3607912E-13 2,2271302E-10 7,4349302E-12 7,7837269E-11 2,1637651E-10

864 3,0485219E-19 1,4225675E-13 2,2320162E-10 7,4086247E-12 7,7604294E-11 2,1609304E-10

872 3,2078376E-19 1,4865144E-13 2,2366881E-10 7,3830309E-12 7,7375796E-11 2,1581768E-10

880 3,3729825E-19 1,5521961E-13 2,2409695E-10 7,3559126E-12 7,7134897E-11 2,1552708E-10

888 3,5453522E-19 1,6201998E-13 2,2450952E-10 7,3298555E-12 7,6903129E-11 2,1524826E-10

896 3,7260638E-19 1,6909701E-13 2,2491863E-10 7,3064026E-12 7,6695005E-11 2,1499642E-10

904 3,9139085E-19 1,7639021E-13 2,2530250E-10 7,2826816E-12 7,6484554E-11 2,1474226E-10

---------------------- Page: 10 ----------------------
IEC 61784-3-18:2011/AMD2:2021 – 9 –
© IEC 2021
Length P = 0,000 1 P = 0,001 P = 0,01 P = 2/n P = 4/n P = 8/n
BER BER BER BER BER BER
n (bits)
(2/n < 0,01) (4/n < 0,01) (8/n < 0,01)

912 4,1094170E-19 1,8391771E-13 2,2566690E-10 7,2592645E-12 7,6276641E-11 2,1449176E-10

920 4,3149802E-19 1,9177870E-13 2,2603648E-10 7,2395448E-12 7,6100259E-11 2,1427904E-10

928 4,5285674E-19 1,9987672E-13 2,2638307E-10 7,2195852E-12 7,5922583E-11 2,1406390E-10

936 4,7511613E-19 2,0824843E-13 2,2671545E-10 7,2004844E-12 7,5752432E-11 2,1385768E-10

944 4,9812106E-19 2,1682048E-13 2,2701775E-10 7,1796799E-12 7,5567534E-11 2,1363440E-10

952 5,2211533E-19 2,2569173E-13 2,2731159E-10 7,1602491E-12 7,5394612E-11 2,1342565E-10

960 5,4694563E-19 2,3478996E-13 2,2758219E-10 7,1398017E-12 7,5212955E-11 2,1320663E-10

968 5,7273710E-19 2,4416203E-13 2,2783927E-10 7,1196502E-12 7,5034031E-11 2,1299117E-10

976 5,9964168E-19 2,5386459E-13 2,2809125E-10 7,1011601E-12 7,4869001E-11 2,1279303E-10

984 6,2750975E-19 2,6382758E-13 2,2832632E-10 7,0822275E-12 7,4701179E-11 2,1259066E-10

992 6,5649845E-19 2,7410911E-13 2,2855304E-10 7,0642280E-12 7,4541811E-11 2,1239812E-10

1000 6,8665031E-19 2,8471872E-13 2,2877180E-10 7,0471750E-12 7,4390378E-11 2,1221562E-10

1008 7,1800231E-19 2,9566333E-13 2,2898236E-10 7,0310126E-12 7,4246304E-11 2,1204228E-10

1016 7,5046837E-19 3,0690001E-13 2,2917944E-10 7,0146000E-12 7,4100550E-11 2,1186647E-10

1024 7,8405842E-19 3,1842537E-13 2,2936321E-10 6,9977961E-12 7,3951436E-11 2,1168675E-10

A.2 Void
Void
Bibliography
Remove the document in entry [2] and replace it with "Void".
Replace the number and title of document in entry [3] by the following:

[3] IEC 61000-1-2, Electromagnetic compatibility (EMC) – Part 1-2: General – Methodology

for the achievement of functional safety of electrical and electronic systems including

equipment with regard to electromagnetic phenomena
Remove footnote 5 in entry [4].
Remove the document in entry [14] and replace it with "Void".
Remove footnote 6 associated with removed document in entry [14].

Remove the documents in entries [28], [32] and [33] and replace each one with "Void".

Remove the document in entry [34] and replace it with "Void".
Remove footnote 7 associated with removed document in entry [34].
Remove the document in entry [41] and replace it with "Void".
Add, at the end of Bibliography, the following new references:
---------------------- Page: 11 ----------------------
– 10 – IEC 61784-3-18:2011/AMD2:2021
© IEC 2021

[48] IEC 61000-6-7, Electromagnetic compatibility (EMC) – Part 6-7: Generic standards –

Immunity requirements for equipment intended to perform functions in a safety-related

system (functional safety) in industrial locations

[49] IEC 61010-2-201, Safety requirements for electrical equipment for measurement,

control and laboratory use – Part 2-201: Particular requirements for control equipment

[50] IEC 61784-3 (all parts), Industrial communication networks – Profiles – Part 3:

Functional safety fieldbuses

[51] ISO 13849 (all parts), Safety of machinery – Safety-related parts of control systems

___________
---------------------- Page: 12 ----------------------
– 12 – IEC 61784-3-18:2011/AMD2:2021
© IEC 2021
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
RÉSEAUX DE COMMUNICATION INDUSTRIELS –
PROFILS –
Partie 3-18: Bus de terrain de sécurité fonctionnelle –
Spécifications supplémentaires pour CPF 18
AMENDEMENT 2
AVANT-PROPOS

1) La Commission Electrotechnique Internationale (IEC) est une organisation mondiale de normalisation composée

de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l'IEC). L'IEC a pour objet de

favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de

l'électricité et de l'électronique. A cet effet, l'IEC – entre autres activités – publie des Normes internationales,

des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au public (PAS) et des

Guides (ci-après dénommés "Publication(s) de l'IEC"). Leur élaboration est confiée à des comités d'études, aux

travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les organisations

internationales, gouvernementales et non gouvernementales, en liaison avec l'IEC, participent également aux

travaux. L'IEC collabore étroitement avec l'Organisation Internationale de Normalisation (ISO), selon des

conditions fixées par accord entre les deux organisations.

2) Les décisions ou accords officiels de l'IEC concernant les questions techniques représentent, dans la mesure du

possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de l'IEC intéressés

sont représentés dans chaque comité d'études.

3) Les Publications de l'IEC se présentent sous la forme de recommandations internationales et sont agréées

comme telles par les Comités nationaux de l'IEC. Tous les efforts raisonnables sont entrepris afin que l'IEC

s'assure de l'exactitude du contenu technique de ses publications; l'IEC ne peut pas être tenue responsable de

l'éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.

4) Dans le but d'encourager l'uniformité internationale, les Comités nationaux de l'IEC s'engagent, dans toute la

mesure possible, à appliquer de façon transparente les Publications de l'IEC dans leurs publications nationales

et régionales. Toutes divergences entre toutes Publications de l'IEC et toutes publications nationales ou

régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.

5) L'IEC elle-même ne fournit aucune attestation de conformité. Des organismes de certification indépendants

fournissent des services d'évaluation de conformité et, dans certains secteurs, accèdent aux marques de

conformité de l'IEC. L'IEC n'est responsable d'aucun des services effectués par les organismes de certification

indépendants.

6) Tous les utilisateurs doivent s'assurer qu'ils sont en possession de la dernière édition de cette publication.

7) Aucune responsabilité ne doit être imputée à l'IEC, à ses administrateurs, employés, auxiliaires ou mandataires,

y compris ses experts particuliers et les membres de ses comités d'études et des Comités nationaux de l'IEC,

pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre dommage de quelque

nature que ce soit, directe ou indirecte, ou pour supporter les coûts (y compris les frais de justice) et les dépenses

découlant de la publication ou de l'utilisation de cette Publication de l'IEC ou de toute autre Publication de l'IEC,

ou au crédit qui lui est accordé.

8) L'attention est attirée sur les références normatives citées dans cette publication. L'utilisation de publications

référencées est obligatoire pour une application correcte de la présente publication.

9) L'attention est attirée sur le fait que certains des éléments de la présente Publication de l'IEC peuvent faire l'objet

de droits de brevet. L'IEC ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits de

brevets.

L'Amendement 2 à l'IEC 61784-3-18:2011 a été établi par le sous-comité 65C: Réseaux

industriels, du comité d'études 65 de l'IEC: Mesure, commande et automation dans les

processus industriels.
---------------------- Page: 13 ----------------------
IEC 61784-3-18:2011/AMD2:2021 – 13 –
© IEC 2021
Le texte de cet Amendement est issu des documents suivants:
FDIS Rapport de vote
65C/1083/FDIS 65C/1087/RVD

Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant

abouti à son approbation.
La version française de la norme n’a pas été soumise au vote.

La langue employée pour l'élaboration de cette Norme internationale est l'anglais.

Le présent document a été rédigé selon les Directives ISO/IEC, Partie 2, il a été développé

selon les Directives ISO/IEC, Partie 1 et les Directives ISO/IEC, Supplément IEC, disponibles

sous www.iec.ch/members_experts/refdocs. Les principaux types de documents développés

par l'IEC sont décrits plus en détail sous w
...

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