EN 61784-3-18:2011/A1:2017

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

Industrielle Kommunikationsnetze - Profile - Teil 3-18: Funktional sichere Übertragung bei Feldbussen - Zusätzliche Festlegungen für die Kommunikationsprofilfamilie 18

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

Industrijska komunikacijska omrežja - Profili - 3-18. del: Funkcijska varnost procesnih vodil - Dodatne specifikacije za CPF 18 (IEC 61784-3-18:2011/A1:2016)

General Information

• Status: Published
• Publication Date: 16-Feb-2017
• Withdrawal Date: 15-Jan-2020
• ICS: 13.110 - Safety of machinery
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.05 - Multilayer applications
• Technical Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Drafting Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 17-Feb-2017
• Completion Date: 17-Feb-2017
• Ref Project: SIST EN 61784-3-18:2011/A1:2017 - Industrial communication networks - Profiles - Part 3-18: Functional safety fieldbuses - Additional specifications for CPF 18 (IEC 61784-3-18:2011/A1:2016)

Relations

• Amends: EN 61784-3-18:2011 - Industrial communication networks - Profiles - Part 3-18: Functional safety fieldbuses - Additional specifications for CPF 18
• Effective Date: 07-Jun-2022

Overview

EN 61784-3-18:2011/A1:2017 is a European standard developed by CLC focusing on industrial communication networks specifically tailored for functional safety fieldbuses. It provides additional specifications for Communication Profile Family (CPF) 18, enhancing the implementation of safety-related communication in industrial automation and control systems.

This standard amends the base publication EN 61784-3-18:2011, incorporating updates aligned with IEC 61784-3-18:2011/A1:2016. It addresses detailed protocol structures, safety communication layers, and system requirements to ensure robust and reliable safety communication over fieldbus networks.

Key Topics

• Functional Safety Fieldbuses: Specifies protocols and communication profiles to ensure safe data exchange in industrial environments.
• CPF 18 Specifications: Defines additional requirements for the communication profile family 18, ensuring compatibility and enhanced safety performance.
• Protocol Versions: Supports two protocol versions, with specific structures for safety communication layers including Packet Data Units (PDUs), state encodings, and error handling.
• Safety Communication Layer (FAL): Includes state definitions such as BOOTUP, STOPPED, OPERATIONAL, and PRE-OPERATIONAL for different protocol versions.
• Data Integrity Measures: Incorporates consecutive numbering for sequencing, 32-bit Cyclic Redundancy Checks (CRC) for error detection, and allowances for error correction mechanisms within the communication “black channel.”
• Safety Functional Requirements: Addresses probability of failure on demand (PFH), safety integrity level (SIL), and proof test or mission intervals compliant with IEC 61508 and ISO 13849 standards.
• System Documentation: Specifies necessary safety manual content including PFH, SIL, proof test intervals, and supported protocol versions to ensure comprehensive safety management.

Applications

EN 61784-3-18:2011/A1:2017 is essential for industries requiring stringent functional safety communication over fieldbus networks such as:

• Industrial Automation: Facilitates safe data exchange between controllers, sensors, and actuators in manufacturing processes.
• Process Industry: Supports safety communication in chemical, oil and gas, and pharmaceutical sectors where hazardous processes demand high reliability.
• Control Systems: Integrates with programmable logic controllers (PLCs) and safety instrumented systems (SIS) to meet cybersecurity and safety protocols.
• Safety-Critical Systems: Ensures compliance with international safety standards for systems requiring fault-tolerant communication protocols.
• Multilayer Industrial Networks: Implements layered communication profiles addressing both general industrial data and critical safety data simultaneously.

Related Standards

This amendment and standard integrate closely with:

• IEC 61784-3-18: The international base standard for functional safety fieldbuses and CPF 18 specifications.
• IEC 61508: Functional safety of electrical/electronic/programmable electronic safety-related systems, defining PFH, SIL, and proof test parameters.
• ISO 13849-1: Safety of machinery – Safety-related parts of control systems, addressing mission time and performance levels.
• EN 61784-3: Broader industrial communication network profiles focusing on functional safety aspects across various industrial fieldbus systems.

Practical Value

By implementing EN 61784-3-18:2011/A1:2017, industry professionals can:

• Ensure high integrity and reliability of safety-critical communication in process and manufacturing environments.
• Utilize standardized protocols reducing integration complexity and enhancing interoperability between devices.
• Document safety performance indicators clearly in system manuals to comply with regulatory requirements and safety certifications.
• Employ error correction and detection mechanisms to maintain data fidelity, reducing risk of hazardous failures.
• Plan maintenance and testing activities based on standardized proof test intervals and SIL classifications.

Adoption of this standard supports safer, more efficient operations within industrial automation and process control systems, making it vital for manufacturers, system integrators, and safety engineers committed to achieving high functional safety levels.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2017
Industrijska komunikacijska omrežja - Profili - 3-18. del: Funkcijska varnost
procesnih vodil - Dodatne specifikacije za CPF 18 (IEC 61784-3-18:2011/A1:2016)
Industrial communication networks - Profiles - Part 3-18: Functional safety fieldbuses -
Additional specifications for CPF 18 (IEC 61784-3-18:2011/A1:2016)
Industrielle Kommunikationsnetze - Profile - Teil 3-18: Funktional sichere Übertragung
bei Feldbussen - Zusätzliche Festlegungen für die Kommunikationsprofilfamilie 18 (IEC
61784-3-18:2011/A1:2016)
Réseaux de communication industriels - Profils - Partie 3-18: Bus de terrain de sécurité
fonctionnelle - Spécifications supplémentaires pour le CPF 18 (IEC 61784-3-
18:2011/A1:2016)
Ta slovenski standard je istoveten z: EN 61784-3-18:2011/A1:2017
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.05 9HþVORMQHXSRUDEQLãNH Multilayer applications
UHãLWYH
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61784-3-18:2011/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2017
ICS 13.110; 25.040.40; 35.100.05

English Version
Industrial communication networks - Profiles -
Part 3-18: Functional safety fieldbuses - Additional specifications
for CPF 18
(IEC 61784-3-18:2011/A1:2016)
Réseaux de communication industriels - Profils -  Industrielle Kommunikationsnetze - Profile -
Partie 3-18: Bus de terrain de sécurité fonctionnelle - Teil 3-18: Funktional sichere Übertragung bei Feldbussen -
Spécifications supplémentaires pour le CPF 18 Zusätzliche Festlegungen für die
(IEC 61784-3-18:2011/A1:2016) Kommunikationsprofilfamilie 18
(IEC 61784-3-18:2011/A1:2016)
This amendment A1 modifies the European Standard EN 61784-3-18:2011; it was approved by CENELEC on 2017-01-16. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61784-3-18:2011/A1:2017 E

European foreword
This document (EN 61784-3-18:2011/A1:2017) consists of the text of IEC 61784-3-18:2011/A1:2016
prepared by SC 65C “Industrial networks” of IEC/TC 65 “Industrial process measurement, control and
automation”.
The following dates are fixed:

• latest date by which the document has to be (dop) 2018-01-16
implemented
at national level by publication of an identical
national standard or by endorsement
(dow) 2020-01-16
• latest date by which the national standards conflicting
with the 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 [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 61784-3-18:2011/A1:2016 was approved by CENELEC as
a European Standard without any modification.
IEC 61784-3-18 ®
Edition 1.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 1
AM ENDEMENT 1
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 le CPF 18

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.110; 25.040.40, 35.100.05 ISBN 978-2-8322-3479-2

– 2 – IEC 61784-3-18:2011/AMD1:2016
 IEC 2016
FOREWORD
This amendment has been prepared by subcommittee 65C: Industrial networks, of IEC
technical committee 65: Industrial-process measurement, control and automation.
The text of this amendment is based on the following documents:
FDIS Report on voting
65C/851/FDIS 65C/854/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base 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.
SIST EN 61784-3-18:20
...