EN 61784-3-1:2010

SLOVENSKI STANDARD
01-oktober-2010
1DGRPHãþD
SIST EN 61784-3-1:2008
Industrijska komunikacijska omrežja - Profili - 3-1. del: Funkcijska varnost
procesnih vodil - Dodatne specifikacije za CPF 1 (IEC 61784-3-1:2010)
Industrial communication networks - Profiles - Part 3-1: Functional safety fieldbuses -
Additional specifications for CPF 1 (IEC 61784-3-1:2010)
Industrielle Kommunikationsnetze - Profile - Teil 3-1: Funktional sichere Übertragung bei
Feldbussen - Zusätzliche Festlegungen für die Kommunikationsprofilfamilie 1 (IEC
61784-3-1:2010)
Réseaux de communication industriels - Partie 3-1: Bus de terrain à sécurité
fonctionnelle - Spécifications complémentaires pour le CPF 1 (CEI 61784-3-1:2010)
Ta slovenski standard je istoveten z: EN 61784-3-1:2010
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 61784-3-1
NORME EUROPÉENNE
August 2010
EUROPÄISCHE NORM
ICS 25.040.40;35.100.05 Supersedes EN 61784-3-1:2008

English version
Industrial communication networks -
Profiles -
Part 3-1: Functional safety fieldbuses -
Additional specifications for CPF 1
(IEC 61784-3-1:2010)
Réseaux de communication industriels -  Industrielle Kommunikationsnetze -
Partie 3-1: Bus de terrain à sécurité Profile -
fonctionnelle - Teil 3-1: Funktional sichere Übertragung
Spécifications complémentaires bei Feldbussen -
pour le CPF 1 Zusätzliche Festlegungen
(CEI 61784-3-1:2010) für die Kommunikationsprofilfamilie 1
(IEC 61784-3-1:2010)
This European Standard was approved by CENELEC on 2010-07-01. 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 Central Secretariat 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 Central Secretariat 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61784-3-1:2010 E
Foreword
The text of document 65C/591A/FDIS, future edition 2 of IEC 61784-3-1, 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 was approved by CENELEC as EN 61784-3-1 on 2010-07-01.
This European Standard supersedes EN 61784-3-1:2008.
The main technical changes with respect to EN 61784-3-1:2008 are listed below:
− updates in relation with changes in EN 61784-3;
− adjustment of Figure 5;
− change of sequence number from two octets to four octets in 7.2.2 to match the final protocol from the
consortium.
− addition of details for time synchronization in 7.2.4;
− addition of information for safety response time in 9.3;
− addition of information in constraints for calculation of system characteristics in 9.5.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-07-01
Annex ZA has been added by CENELEC.
__________
- 3 - EN 61784-3-1:2010
Endorsement notice
The text of the International Standard IEC 61784-3-1:2010 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 60204-1 NOTE  Harmonized as EN 60204-1.
IEC 61158 series NOTE  Harmonized in EN 61158 series (not modified).
IEC 61326-3-1 NOTE  Harmonized as EN 61326-3-1
IEC 61326-3-2 NOTE  Harmonized as EN 61326-3-2.
IEC 61496 series NOTE  Harmonized in EN 61496 series (partially modified).
IEC 61508-5:2010 NOTE  Harmonized as EN 61508-5:2010 (not modified).
IEC 61508-6:2010 NOTE  Harmonized as EN 61508-6:2010 (not modified).
IEC 61784-2 NOTE  Harmonized as EN 61784-2.
IEC 61784-5 series NOTE  Harmonized in EN 61784-5 series (not modified).
IEC 61800-5-2 NOTE  Harmonized as EN 61800-5-2.
IEC 62061 NOTE  Harmonized as EN 62061.
ISO 10218-1 NOTE  Harmonized as EN ISO 10218-1.
ISO 12100-1 NOTE  Harmonized as EN ISO 12100-1.
ISO 13849-1 NOTE  Harmonized as EN ISO 13849-1.
ISO 13849-2 NOTE  Harmonized as EN ISO 13849-2.
ISO 14121 NOTE  Harmonized as EN ISO 14121.
__________
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 61131-2 - Programmable controllers - EN 61131-2 -
Part 2: Equipment requirements and tests

IEC 61158-2 - Industrial communication networks - Fieldbus EN 61158-2 -
specifications -
Part 2: Physical layer specification and service
definition
IEC 61158-3-1 - Industrial communication networks - Fieldbus EN 61158-3-1 -
specifications -
Part 3-1: Data-link layer service definition -
Type 1 elements
IEC 61158-4-1 - Industrial communication networks - Fieldbus EN 61158-4-1 -
specifications -
Part 4-1: Data-link layer protocol specification -
Type 1 elements
IEC 61158-5-5 - Industrial communication networks - Fieldbus EN 61158-5-5 -
specifications -
Part 5-5: Application layer service definition -
Type 5 elements
IEC 61158-5-9 - Industrial communication networks - Fieldbus EN 61158-5-9 -
specifications -
Part 5-9: Application layer service definition -
Type 9 elements
IEC 61158-6-5 - Industrial communication networks - Fieldbus EN 61158-6-5 -
specifications -
Part 6-5: Application layer protocol
specification - Type 5 elements

IEC 61158-6-9 - Industrial communication networks - Fieldbus EN 61158-6-9 -
specifications -
Part 6-9: Application layer protocol
specification - Type 9 elements

IEC 61508 Series Functional safety of EN 61508 Series
electrical/electronic/programmable electronic
safety-related systems
IEC 61508-1 2010 Functional safety of EN 61508-1 2010
electrical/electronic/programmable electronic
safety-related systems -
Part 1: General requirements
- 5 - EN 61784-3-1:2010
Publication Year Title EN/HD Year

IEC 61508-2 2010 Functional safety of EN 61508-2 2010
electrical/electronic/programmable electronic
safety-related systems -
Part 2: Requirements for
electrical/electronic/programmable electronic
safety-related systems
IEC 61508-3 2010 Functional safety of EN 61508-3 2010
electrical/electronic/programmable electronic
safety-related systems -
Part 3: Software requirements
IEC 61508-4 2010 Functional safety of EN 61508-4 2010
electrical/electronic/programmable electronic
safety-related systems -
Part 4: Definitions and abbreviations

IEC 61511 Series Functional safety - Safety instrumented EN 61511 Series
systems for the process industry sector

IEC 61784-1 - Industrial communication networks - Profiles - EN 61784-1 -
Part 1: Fieldbus profiles
IEC 61784-3 2010 Industrial communication networks - Profiles - EN 61784-3 2010
Part 3: Functional safety fieldbuses - General
rules and profile definitions
IEC 61918 - Industrial communication networks - Installation EN 61918 -
of communication networks in industrial
premises
IEC 62280-1 - Railway applications - Communication, - -
signalling and processing systems -
Part 1: Safety-related communication in closed
transmission systems
ISO/IEC 8802-3 - Information technology - Telecommunications - -
and information exchange between systems -
Local and metropolitan area networks - Specific
requirements -
Part 3: Carrier sense multiple access with
collision detection (CSMA/CD) access method
and physical layer specifications

IEC 61784-3-1 ®
Edition 2.0 2010-06
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Profiles –
Part 3-1: Functional safety fieldbuses – Additional specifications for CPF 1

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XB
ICS 25.040.40; 35.100.05 ISBN 978-2-88910-973-9
– 2 – 61784-3-1 © IEC:2010(E)
CONTENTS
FOREWORD.7
0 Introduction .9
0.1 General .9
0.2 Patent declaration .11
1 Scope.12
2 Normative references .12
3 Terms, definitions, symbols, abbreviated terms and conventions .13
3.1 Terms and definitions .13
3.1.1 Common terms and definitions .14
3.1.2 CPF 1: Additional terms and definitions .18
3.2 Symbols and abbreviated terms.19
3.2.1 Common symbols and abbreviated terms .19
3.2.2 CPF 1: Additional symbols and abbreviated terms .19
3.3 Conventions .20
3.3.1 State diagrams .20
3.3.2 Use of colors in figures.21
4 Overview of FSCP 1/1 (FOUNDATION Fieldbus™ SIS) .21
4.1 General .21
4.2 Key concepts of FSCP 1/1.22
4.2.1 Black channel .22
4.2.2 Connection key.22
4.2.3 Cross-check .23
4.2.4 FSCP 1/1.23
4.2.5 Programmable electronic system .23
4.2.6 Queuing delays .23
4.2.7 Redundancy .23
4.2.8 SIL environment .23
4.3 Key components of FSCP 1/1.23
4.3.1 Overview .23
4.3.2 Black channel .24
4.4 Relationship to the ISO OSI basic reference model .25
5 General .25
5.1 External documents providing specifications for the profile.25
5.2 Safety functional requirements .25
5.2.1 Requirements for functional safety.25
5.2.2 Functional constraints.26
5.2.3 Device manufacturer requirements .26
5.3 Safety measures .26
5.3.1 Sequence number .26
5.3.2 Time stamp .26
5.3.3 Time expectation .26
5.3.4 Connection authentication .26
5.3.5 Data integrity assurance.26
5.3.6 Redundancy with cross checking .27
5.3.7 Different data integrity assurance systems .27
5.3.8 Relationships between errors and safety measures .27

61784-3-1 © IEC:2010(E) – 3 –
5.4 Safety communication layer structure .27
5.4.1 Network topology and device connectivity.27
5.4.2 Device architecture.28
5.5 Relationships with FAL (and DLL, PhL) .29
5.5.1 General .29
5.5.2 Data types .29
6 Safety communication layer services .30
6.1 Application Process (AP).30
6.1.1 Overview .30
6.1.2 Network visible objects .30
6.1.3 Application layer interface .30
6.1.4 Object dictionary .30
6.1.5 Application program directory .30
6.2 Function block application processes .31
6.2.1 General .31
6.2.2 Function block model.31
6.2.3 Application process .33
6.3 Device to device communications.36
6.3.1 General .36
6.3.2 Client/server .36
6.3.3 Publisher/subscriber .37
6.3.4 Report distribution .37
6.3.5 FBAP operation in a linking device .37
6.3.6 System management kernel protocol (SMKP) communications .37
6.4 Profiles.37
6.4.1 General .37
6.4.2 FSCP 1/1 profile .37
6.5 Device descriptions .38
6.6 Common file formats .38
6.7 Configuration information .39
6.7.1 Overview .39
6.7.2 Level 1 configuration: manufacturer device definition.39
6.7.3 Level 2 configuration: network definition .39
6.7.4 Level 3 configuration: distributed application definition .39
6.7.5 Level 4 configuration: device configuration .39
7 Safety communication layer protocol .39
7.1 Safety PDU format .39
7.1.1 General .39
7.1.2 Safety communication layer CRC .39
7.1.3 Black channel time synchronization monitoring.40
7.1.4 Sequence number .40
7.1.5 Virtual header.41
7.1.6 Connection key.41
7.1.7 Redundancy and cross-check .41
7.2 Protocol extensions for use in safety-related systems.42
7.2.1 Overview .42
7.2.2 Publisher-subscriber interactions.42
7.2.3 Client-server interactions.47
7.2.4 Time synchronization.53

– 4 – 61784-3-1 © IEC:2010(E)
7.2.5 Device start-up .54
7.3 Communications entity .54
7.3.1 General .54
7.3.2 Network management.54
7.3.3 FMS .54
7.3.4 H1 stack .54
8 Safety communication layer management.55
8.1 Overview .55
8.2 SMK communications .55
8.3 FMS services .55
8.4 SMK services .55
8.4.1 General .55
8.4.2 Address assignment .55
8.4.3 Time synchronization.55
8.5 Safety communication layer configuration and start-up .55
8.5.1 H1 configuration and start-up .55
8.5.2 FSCP 1/1 FBAP.56
8.5.3 Testing .56
9 System requirements.56
9.1 Indicators and switches .56
9.2 Installation guidelines.56
9.3 Safety function response time .56
9.3.1 Overview .56
9.3.2 Safety Sensor.56
9.3.3 Input Function Block .57
9.3.4 Safe Transmission.57
9.3.5 Logic Solver .57
9.3.6 Discrete Output Function Block .57
9.3.7 Safety Actuator.57
9.4 Duration of demands .57
9.5 Constraints for calculation of system characteristics.57
9.5.1 System characteristics.57
9.5.2 Message rate.57
9.5.3 SIL level .58
9.5.4 Mixing FSCP 1/1 devices and CP 1/1 devices.58
9.5.5 Devices on a segment .58
9.5.6 Residual error rate calculations .58
9.6 Maintenance.59
9.7 Safety manual .59
10 Assessment.59
Annex A (informative) Additional information for functional safety communication
profiles of CPF 1 .60
A.1 Hash function calculation.60
A.2 Fault conditions arising from locations beyond the output function block.62
Annex B (informative) Information for assessment of the functional safety
communication profiles of CPF 1 .64
Bibliography.65

61784-3-1 © IEC:2010(E) – 5 –
Table 1 – Example state transition table .21
Table 2 – Safety measures and possible communication errors .27
Table 3 – Data types used within FSCP 1/1 .30
Table 4 – Fault state behaviour.33
Table 5 – Publisher states .43
Table 6 – Publisher state table - Received transitions .44
Table 7 – Publisher state table - Internal transitions.44
Table 8 – Subscriber states .45
Table 9 – Subscriber state table - Received transitions.46
Table 10 – Subscriber state table - Internal transitions.47
Table 11 – Server states during read operations .48
Table 12 – Received transitions for a FSCP 1/1 Server during read operations.49
Table 13 – States of a FSCP 1/1 server during write operations.51
Table 14 – Received transitions for a FSCP 1/1 Server during write operations .51
Table 15 – Values used for calculation of residual error rate.58
Table 16 – Values of R (Pe) for different values of n .58
SL
Table A.1 – Fault conditions arising from locations beyond the output function block .63

Figure 1 – Relationships of IEC 61784-3 with other standards (machinery) .9
Figure 2 – Relationships of IEC 61784-3 with other standards (process).10
Figure 3 – Example state diagram.20
Figure 4 – Use of colors in figures .21
Figure 5 – Scope of FSCP 1/1 .22
Figure 6 – FSCP 1/1 architecture (H1) .24
Figure 7 – Black channel .24
Figure 8 – FSCP 1/1 in system architecture .28
Figure 9 – FSCP 1/1 H1 device.28
Figure 10 – FSCP 1/1 protocol layers .29
Figure 11 – Relationship between FSCP 1/1 and the other layers of IEC 61158 Type 1 .29
Figure 12 – Key write-lock .32
Figure 13 – Password write-lock .32
Figure 14 – Example of FSCP 1/1 communication.36
Figure 15 – Example of device description.38
Figure 16 – Safety PDU showing virtual content.43
Figure 17 – Safety PDU showing duplication of data and addition of CRC.43
Figure 18 – State transition diagram for a FSCP 1/1 Publisher.43
Figure 19 – Safety PDU showing duplication of data and addition of CRC.45
Figure 20 – Safety PDU showing virtual content.45
Figure 21 – State transition diagram for a FSCP 1/1 subscriber .46
Figure 22 – Safety PDU showing virtual content.48
Figure 23 – Safety PDU showing virtual content with sub index .48
Figure 24 – Safety PDU showing duplication of data, addition of sequence number and
CRC .48

– 6 – 61784-3-1 © IEC:2010(E)
Figure 25 – State transition diagram for a FSCP 1/1 Server during read operations .49
Figure 26 – Safety PDU showing duplication of data and addition of sequence number
and CRC.50
Figure 27 – Example of FSCP 1/1 write .50
Figure 28 – Example of FSCP 1/1 write with sub index .50
Figure 29 – State transition diagram for a FSCP 1/1 Server during write operations.51
Figure 30 – Safety PDU showing duplication of data and CRC.52
Figure 31 – Example of safety function response time components.56
Figure 32 – Example FSCP 1/1 network topology.57

61784-3-1 © IEC:2010(E) – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
PROFILES –
Part 3-1: Functional safety fieldbuses –
Additional specifications for CPF 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.
International Standard IEC 61784-3-1 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial process measurement, control and
automation.
This second edition cancels and replaces the first edition published in 2007. This edition
constitutes a technical revision. The main changes with respect to the previous edition are
listed below:
⎯ updates in relation with changes in IEC 61784-3;
⎯ adjustment of Figure 5;
⎯ change of sequence number from two octets to four octets in 7.2.2 to match the final
protocol from the consortium.
⎯ addition of details for time synchronization in 7.2.4;
⎯ addition of information for safety response time in 9.3;
⎯ addition of information in constraints for calculation of system characteristics in 9.5.

– 8 – 61784-3-1 © IEC:2010(E)
The text of this standard is based on the following documents:
FDIS Report on voting
65C/591A/FDIS 65C/603/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
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 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
61784-3-1 © IEC:2010(E) – 9 –
0 Introduction
0.1 General
The IEC 61158 fieldbus standard together with its companion standards IEC 61784-1 and
IEC 61784-2 defines a set of communication protocols that enable distributed control of
automation applications. Fieldbus technology is now considered well accepted and well
proven. Thus many fieldbus enhancements are emerging, addressing not yet standardized
areas such as real time, safety-related and security-related applications.
This standard explains the relevant principles for functional safety communications with
reference to IEC 61508 series and specifies several safety communication layers (profiles and
corresponding protocols) based on the communication profiles and protocol layers of
IEC 61784-1, IEC 61784-2 and the IEC 61158 series. It does not cover electrical safety and
intrinsic safety aspects.
Figure 1 shows the relationships between this standard and relevant safety and fieldbus
standards in a machinery environment.
Product standards
ISO 12100-1 and ISO 14121
ISO 12100-1 and ISO 14121
IEC 61496 IEC 61800-5-2 ISO 10218-1 Safety of machinery – Principles for
IEC 61131-6
IEC 61496 IEC 61131-6 IEC 61800-5-2 ISO 10218-1 Safety of machinery – Principles for
Safety f. e.g. Safety functions Safety requirements design and risk assessment
Safety for PLC design and risk assessment
Safety f. e.g. Safety for PLC Safety functions Safety requirements
light curtains (under consideration) for drives for robots
(under consideration)
light curtains for drives for robots
Design of safety-related electrical, electronic and program-
IEC 61784-4 IEC 62443
IEC 61784-4 IEC 62443
Security Security mable electronic control systems (SRECS) for machinery
Security Security
(profile-specific) (common part)
(profile-specific) (common part)
SIL based PL based
IEC 61784-5 IEC 61918
IEC 61784-5 IEC 61918
Installation guide Installation guide
Installation guide Installation guide Design objective
(profile-specific) (common part)
(profile-specific) (common part)
Applicable standards
ISO 13849-1, -2
ISO 13849-1, -2
IEC 60204-1
IEC 60204-1
Safety-related parts
Safety-related parts
Safety of electrical
Safety of electrical
IEC 61000-1-2
IEC 61000-1-2 of machinery
of machinery
equipment
equipment
Methodology EMC & FS
Methodology EMC & FS (SRPCS)
(SRPCS)
IEC 61326-3-1
IEC 61784-3
IEC 61784-3 IEC 61326-3-1
Non-electrical
Non-electrical
Functional safety Test EMC & FS
Functional safety Test EMC & FS
communication
communication
Electrical
Electrical
US: NFPA 79
US: NFPA 79
profiles
profiles
(2006)
(2006)
IEC 62061
IEC 62061
Functional safety
Functional safety
IEC 61158 series /
IEC 61158 series /
for machinery
for machinery
IEC 61784-1, -2 IEC 61508 series
IEC 61784-1, -2 IEC 61508 series (SRECS)
(SRECS)
Functional safety (FS)
Fieldbus for use in Functional safety (FS) (including EMC for
Fieldbus for use in (including EMC for
(basic standard)
(basic standard) industrial environment)
industrial control systems industrial environment)
industrial control systems
Key
(yellow) safety-related standards
(blue) fieldbus-related standards
(dashed yellow) this standard
NOTE Subclauses 6.7.6.4 (high complexity) and 6.7.8.1.6 (low complexity) of IEC 62061 specify the relationship
between PL (Category) and SIL.
Figure 1 – Relationships of IEC 61784-3 with other standards (machinery)

– 10 – 61784-3-1 © IEC:2010(E)
Figure 2 shows the relationships between this standard and relevant safety and fieldbus
standards in a process environment.
Product standards
IEC 61496 IEC 61800-5-2 ISO 10218-1
IEC 61131-6
IEC 61496 IEC 61131-6 IEC 61800-5-2 ISO 10218-1
Safety f. e.g. Safety functions Safety requirements
Safety for PLC
Safety f. e.g. Safety for PLC Safety functions Safety requirements
light curtains (under consideration) for drives for robots
(under consideration)
light curtains for drives for robots
IEC 61784-4 IEC 62443
IEC 61784-4 IEC 62443
Security Security
Security Security
(profile-specific) (common part)
(profile-specific) (common part)
See safety standards for machinery
(Figure 1)
IEC 61784-5 IEC 61918
IEC 61784-5 IEC 61918
Installation guide Installation guide
Installation guide Installation guide
(profile-specific) (common part)
(profile-specific) (common part)
Valid also in process industries,
whenever applicable
a)
a)
IEC 61326-3-2
IEC 61326-3-2
EMC and
EMC and
functional safety
functional safety
IEC 61784-3
IEC 61784-3
Functional safety
Functional safety
communication
communication
profiles
profiles
US:
US:
ISA-84.00.01
ISA-84.00.01
b)
b)
(3 parts = modified
IEC 61511 series
IEC 61511 series (3 parts = modified
IEC 61511)
Functional safety –
IEC 61158 series / Functional safety – IEC 61511)
IEC 61158 series /
Safety instrumented
Safety instrumented
IEC 61784-1, -2 IEC 61508 series
IEC 61784-1, -2 IEC 61508 series
systems for the
systems for the
Fieldbus for use in Functional safety (FS)
Functional safety (FS)
Fieldbus for use in DE: VDI 2180
process industry sector DE: VDI 2180
process industry sector
(basic standard)
(basic standard)
industrial control systems Part 1-4
industrial control systems
Part 1-4
Key
(yellow) safety-related standards
(blue) fieldbus-related standards
(dashed yellow) this standard
a
For specified electromagnetic environments; otherwise IEC 61326-3-1.
b
EN ratified.
Figure 2 – Relationships of IEC 61784-3 with other standards (process)
Safety communication layers which are implemented as parts of safety-related systems
according to IEC 61508 series provide the necessary confidence in the transportation of
messages (information) between two or more participants on a fieldbus in a safety-related
system, or sufficient confidence of safe behaviour in the event of fieldbus errors or failures.
Safety communication layers specified in this standard do this in such a way that a fieldbus
can be used for applications requiring functional safety up to the Safety Integrity Level (SIL)
specified by its corresponding functional safety communi
...