EN 61784-3-1:2008

SLOVENSKI STANDARD
01-september-2008
Industrijska komunikacijska omrežja - Profili - 3-1. del: Funkcijska varnost
procesnih vodil - Dodatne specifikacije za CPF 1 (IEC 61784-3-1:2007)
Industrial communication networks - Profiles - Part 3-1: Functional safety fieldbuses -
Additional specifications for CPF 1
Industrielle Kommunikationsnetze - Profile - Teil 3-1: Funktional sichere Übertragung bei
Feldbussen - Zusätzliche Festlegungen für die Kommunikationsprofilfamilie 1
Réseaux de communication industriels - Profils - Partie 3-1: Bus de terrain de sécurité
fonctionnelle - Spécification supplémentaire pour CPF 1
Ta slovenski standard je istoveten z: EN 61784-3-1:2008
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
June 2008
EUROPÄISCHE NORM
ICS 35.100.05; 25.040.40
English version
Industrial communication networks -
Profiles -
Part 3-1: Functional safety fieldbuses -
Additional specifications for CPF 1
(IEC 61784-3-1:2007)
Réseaux de communication industriels -  Industrielle Kommunikationsnetze -
Profils - Profile -
Partie 3-1: Bus de terrain Teil 3-1: Funktional sichere Übertragung
de sécurité fonctionnelle - bei Feldbussen -
Spécification supplémentaire pour CPF 1 Zusätzliche Festlegungen
(CEI 61784-3-1:2007) für die Kommunikationsprofilfamilie 1
(IEC 61784-3-1:2007)
This European Standard was approved by CENELEC on 2008-05-01. 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, 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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61784-3-1:2008 E
Foreword
The text of document 65C/470/FDIS, future edition 1 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 2008-05-01.
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) 2009-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-05-01
The International Electrotechnical Commission (IEC) and CENELEC draw attention to the fact that it is
claimed that compliance with this document may involve the use of patents concerning the functional
safety communication profiles for family 1 as follows, where the [xx] notation indicates the holder of the
patent right:
US 6,999,824 [FF] System and method for implementing safety instrumented systems in a fieldbus
architecture
The IEC and CENELEC take no position concerning the evidence, validity and scope of these patent
rights.
The holders of these patent rights have assured the IEC that they are willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this
respect, the statements of the holders of these patent rights are registered with IEC.
Information may be obtained from:
[FF] Fieldbus Foundation
9005 Mountain Ridge Drive
Bowie Bldg. - Suite 190
Austin, TX 78759-5316
Tel: +1 512 794 8890
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. IEC and CENELEC shall not be held responsible for
identifying any or all such patent rights.
Annex ZA has been added by CENELEC.
__________
- 3 - EN 61784-3-1:2008
Endorsement notice
The text of the International Standard IEC 61784-3-1:2007 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 60204-1:2006 (not modified).
IEC 61158 NOTE  Harmonized in EN 61158 series (not modified).
IEC 61326-3-1 NOTE  Harmonized in EN 61326-3-1:2008 (not modified).
IEC 61326-3-2 NOTE  Harmonized in EN 61326-3-2:2008 (not modified).
IEC 61496 NOTE  Harmonized as EN 61496-1:2004 (modified)
and as CLC/TS 61496-2:2006 (not modified)
and CLC/TC 61496-3:2008 (not modified)
IEC 61508-4 NOTE  Harmonized as EN 61508-4:2001 (not modified).
IEC 61508-6 NOTE  Harmonized as EN 61508-6:2001 (not modified).
IEC 61784-2 NOTE  Harmonized as EN 61784-2:2008 (not modified).
IEC 61784-5 NOTE  Harmonized in EN 61784-5 series (not modified).
IEC 61800-5-2 NOTE  Harmonized as EN 61800-5-2:2007 (not modified).
IEC 62061 NOTE  Harmonized as EN 62061:2005 (not modified).
ISO 12100-1 NOTE  Harmonized as EN ISO 12100-1:2003 (not modified).
ISO 13849-1 NOTE  Harmonized as EN ISO 13849-1:2006 (not modified).
ISO 13849-2 NOTE  Harmonized as EN ISO 13849-2:2003 (not modified).
__________
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

1) 2)
IEC 61131-2 - Programmable controllers - EN 61131-2 2007
Part 2: Equipment requirements and tests

1) 2)
IEC 61158-2 - Industrial communication networks - EN 61158-2 2008
Fieldbus specifications -
Part 2: Physical layer specification and service
definition
1) 2)
IEC 61158-3-1 - Industrial communication networks - EN 61158-3-1 2008
Fieldbus specifications -
Part 3-1: Data-link layer service definition -
Type 1 elements
1) 2)
IEC 61158-4-1 - Industrial communication networks - EN 61158-4-1 2008
Fieldbus specifications -
Part 4-1: Data-link layer protocol
specification - Type 1 elements

1) 2)
IEC 61158-5-5 - Industrial communication networks - EN 61158-5-5 2008
Fieldbus specifications -
Part 5-5: Application layer service definition -
Type 5 elements
1) 2)
IEC 61158-5-9 - Industrial communication networks - EN 61158-5-9 2008
Fieldbus specifications -
Part 5-9: Application layer service definition -
Type 9 elements
1) 2)
IEC 61158-6-5 - Industrial communication networks - EN 61158-6-5 2008
Fieldbus specifications -
Part 6-5: Application layer protocol
specification - Type 5 elements

1) 2)
IEC 61158-6-9 - Industrial communication networks - EN 61158-6-9 2008
Fieldbus 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 61511 Series Functional safety - Safety instrumented EN 61511 Series
systems for the process industry sector

1) 2)
IEC 61784-1 - Industrial communication networks - Profiles - EN 61784-1 2008
Part 1: Fieldbus profiles
1)
Undated reference.
2)
Valid edition at date of issue.

- 5 - EN 61784-3-1:2008
Publication Year Title EN/HD Year

1) 2)
IEC 61784-3 - Industrial communication networks - Profiles - EN 61784-3 2008
Part 3: Functional safety fieldbuses - General
rules and profile definitions
1) 2)
IEC 61918 (mod) - Industrial communication networks - EN 61918 2008
Installation of communication networks in
industrial premises
IEC 62280-1 2002 Railway applications - Communication, - -
signalling and processing systems -
Part 1: Safety-related communication in
closed transmission systems
IEC 61784-3-1
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Profiles –
Part 3-1: Functional safety fieldbuses – Additional specifications for CPF 1

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XB
ICS 35.100.05 25.040.40 ISBN 2-8318-9398-4

– 2 – 61784-3-1 © IEC:2007(E)
CONTENTS
FOREWORD.6
INTRODUCTION.8
1 Scope.11
2 Normative references .11
3 Terms, definitions, symbols, abbreviated terms and conventions .12
3.1 Terms and definitions .12
3.1.1 Common terms and definitions .12
3.1.2 CPF 1: Additional terms and definitions .16
3.2 Symbols and abbreviated terms.17
3.2.1 Common symbols and abbreviated terms .17
3.2.2 CPF 1: Additional symbols and abbreviated terms .18
3.3 Conventions .18
3.3.1 State Diagrams.18
3.3.2 Use of colors in figures.19
4 Overview of FSCP 1/1 (FOUNDATION Fieldbus™ SIS) .20
4.1 General .20
4.2 Key concepts of FSCP 1/1.21
4.2.1 Black channel .21
4.2.2 Connection key.21
4.2.3 Cross-check .21
4.2.4 FSCP 1/1.21
4.2.5 Programmable electronic system .21
4.2.6 Queuing delays .21
4.2.7 Redundancy .22
4.2.8 SIL environment .22
4.3 Key components of FSCP 1/1.22
4.3.1 Overview .22
4.3.2 Black channel .22
4.4 Relationship to the ISO OSI basic reference model .23
5 General .23
5.1 External documents providing specifications for the profile.23
5.2 Safety functional requirements .23
5.2.1 Requirements for functional safety.23
5.2.2 Functional constraints.24
5.2.3 Device manufacturer requirements .24
5.3 Safety measures .25
5.3.1 Sequence number .25
5.3.2 Time stamp .25
5.3.3 Time expectation .25
5.3.4 Connection authentication .25
5.3.5 Data integrity assurance.25
5.3.6 Redundancy with cross checking .25
5.3.7 Different data integrity assurance systems .25
5.3.8 Relationships between errors and safety measures .25
5.4 Safety communication layer structure .26
5.4.1 Network topology and device connectivity.26

61784-3-1 © IEC:2007(E) – 3 –
5.4.2 Device architecture.26
5.5 Relationships with FAL (and DLL, PhL) .27
5.5.1 General .27
5.5.2 Data Types .28
6 Safety communication layer services .28
6.1 Application Process (AP).28
6.1.1 Overview .28
6.1.2 Network visible objects .29
6.1.3 Application layer interface .29
6.1.4 Object dictionary .29
6.1.5 Application program directory .29
6.2 Function block application processes .29
6.2.1 General .29
6.2.2 Function block model.29
6.2.3 Application process .32
6.3 Device to device communications.34
6.3.1 General .34
6.3.2 Client/server .34
6.3.3 Publisher/subscriber .35
6.3.4 Report distribution .35
6.3.5 FBAP operation in a linking device .35
6.3.6 System management kernel protocol (SMKP) communications .35
6.4 Profiles.35
6.4.1 General .35
6.4.2 FSCP 1/1 profile .35
6.5 Device descriptions .36
6.6 Common file formats .37
6.7 Configuration information .37
6.7.1 Overview .37
6.7.2 Level 1 configuration: manufacturer device definition.37
6.7.3 Level 2 configuration: network definition .37
6.7.4 Level 3 configuration: distributed application definition .37
6.7.5 Level 4 configuration: device configuration .37
7 Safety communication layer protocol .37
7.1 Safety PDU format .37
7.1.1 General .37
7.1.2 Safety communication layer CRC .38
7.1.3 Black channel time synchronization monitoring.38
7.1.4 Sequence number .38
7.1.5 Virtual header.39
7.1.6 Connection key.39
7.1.7 Redundancy and cross-check .40
7.2 Protocol extensions for use in safety-related systems.40
7.2.1 Overview .40
7.2.2 Publisher-subscriber interactions.40
7.2.3 Client-server interactions.46
7.2.4 Time synchronization.51
7.2.5 Device start-up .52
7.3 Communications entity .52

– 4 – 61784-3-1 © IEC:2007(E)
7.3.1 General .52
7.3.2 Network management.52
7.3.3 FMS .52
7.3.4 H1 stack .52
8 Safety communication layer management.53
8.1 Overview .53
8.2 SMK communications .53
8.3 FMS services .53
8.4 SMK services .53
8.4.1 General .53
8.4.2 Address assignment .53
8.4.3 Time synchronization.53
8.5 Safety communication layer configuration and start-up .53
8.5.1 H1 configuration and start-up .53
8.5.2 FSCP 1/1 FBAP.54
8.5.3 Testing .54
9 System requirements.54
9.1 Indicators and switches .54
9.2 Installation guidelines.54
9.3 Safety function response time .54
9.4 Duration of demands .55
9.5 Constraints for calculation of system characteristics.55
9.5.1 Message rate.55
9.5.2 SIL level .55
9.6 Maintenance.55
9.7 Safety manual .55
10 Certification.55
Annex A (informative) Additional information for functional safety communication
profiles of CPF 1 .56
A.1 Hash function calculation.56
A.2 Fault conditions arising from locations beyond the output function block.58
Bibliography.60

Table 1 – Example state transition table .19
Table 2 – Safety measures and possible communication errors .26
Table 3 – Data types used within FSCP 1/1 .28
Table 4 – Fault state behaviour.31
Table 5 – Publisher states .41
Table 6 – Publisher state table - Received transitions .42
Table 7 – Publisher state table - Internal transitions.42
Table 8 – Subscriber states .44
Table 9 – Subscriber state table - Received transitions.45
Table 10 – Subscriber state table - Internal transitions.45
Table 11 – Server states during read operations .47
Table 12 – Received transitions for a FSCP 1/1 Server during read operations.48
Table 13 – States of a FSCP 1/1 server during write operations.49

61784-3-1 © IEC:2007(E) – 5 –
Table 14 – Received transitions for a FSCP 1/1 Server during write operations .50
Table A.1 – Fault conditions arising from locations beyond the output function block .59

Figure 1 – Relationships of IEC 61784-3 with other standards (machinery) .8
Figure 2 – Relationships of IEC 61784-3 with other standards (process).9
Figure 3 – Example state diagram.19
Figure 4 – Use of colors in figures .19
Figure 5 – Scope of FSCP 1/1 .20
Figure 6 – FSCP 1/1 architecture (H1) .22
Figure 7 – Black channel .23
Figure 8 – FSCP 1/1 in system architecture .26
Figure 9 – FSCP 1/1 H1 device.27
Figure 10 – FSCP 1/1 protocol layers .27
Figure 11 – Relationship between FSCP 1/1 and the other layers of IEC 61158 Type 1 .28
Figure 12 – Key write-lock .30
Figure 13 – Password write-lock .30
Figure 14 – Example of FSCP 1/1 communication.34
Figure 15 – Example of device description.36
Figure 16 – Safety PDU showing virtual content.41
Figure 17 – Safety PDU showing duplication of data and addition of CRC.41
Figure 18 – State transition diagram for a FSCP 1/1 Publisher.42
Figure 19 – Safety PDU showing duplication of data and addition of CRC.43
Figure 20 – Safety PDU showing virtual content.43
Figure 21 – State transition diagram for a FSCP 1/1 subscriber .44
Figure 22 – Safety PDU showing virtual content.46
Figure 23 – Safety PDU showing virtual content with sub index .46
Figure 24 – Safety PDU showing duplication of data, addition of sequence number
and CRC.47
Figure 25 – State transition diagram for a FSCP 1/1 Server during read operations .47
Figure 26 – Safety PDU showing duplication of data and addition of sequence number
and CRC.48
Figure 27 – Example of FSCP 1/1 write .49
Figure 28 – Example of FSCP 1/1 write with sub index .49
Figure 29 – State transition diagram for a FSCP 1/1 Server during write operations.50
Figure 30 – Safety PDU showing duplication of data and CRC.51
Figure 31 – Example of safety function response time components.54

– 6 – 61784-3-1 © IEC:2007(E)
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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.
The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed that compliance
with this document may involve the use of patents concerning the functional safety communication profiles for
family 1 as follows, where the [xx] notation indicates the holder of the patent right:
US 6,999,824 [FF] System and method for implementing safety
instrumented systems in a fieldbus architecture
IEC takes no position concerning the evidence, validity and scope of these patent rights.
The holders of these patents rights have assured the IEC that they are willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the
statement of the holders of these patent rights are registered with IEC.
Information may be obtained from:
[FF] Fieldbus Foundation
9005 Mountain Ridge Drive
Bowie Bldg. - Suite 190
Austin, TX  78759-5316
Tel: +1 512 794 8890
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights
other than those identified above. IEC shall not be held responsible for identifying any or all such patent rights.

61784-3-1 © IEC:2007(E) – 7 –
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.
The text of this standard is based on the following documents:
FDIS Report on voting
65C/470/FDIS 65C/481/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.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
The list of all parts of the IEC 61784-3 series, under the general title Industrial communication
networks – Profiles – Functional safety fieldbuses, can be found on the IEC website.

– 8 – 61784-3-1 © IEC:2007(E)
INTRODUCTION
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 61131-6 IEC 61800-5-2 Safety of machinery – Principles for
Safety of machinery – Principles for
IEC 61496 IEC 61131-6 IEC 61800-5-2
Safety f. e.g. Safety for Safety functions design and risk assessment
Safety for PLC design and risk assessment
Safety f. e.g. Safety for Safety functions
light curtains PLC for drives
(under consideration)
light curtains PLC for drives
Design of safety-related electrical, electronic and programmable
IEC 61784-4 IEC 62443
IEC 61784-4 IEC 62443
electronic control systems (SRECS) for machinery
Security Security
Security Security
(profile-specific) (common part)
(profile-specific) (common part)
SIL based PL based
IEC 61784-5 IEC 61918
IEC 61784-5 IEC 61918
Design objective
Installation guide Installation guide
Installation guide Installation guide
(profile-specific) (common part) Applicable standards
(profile-specific) (common part)
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 61326-3-1
of machinery
IEC 61326-3-1 of machinery
equipment
equipment
EMC and (SRPCS)
EMC and (SRPCS)
functional safety
functional safety
IEC 61784-3
IEC 61784-3
Non-electrical
Non-electrical
Functional safety
Functional safety
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
Fieldbus for use in Functional safety (including EMI for
Fieldbus for use in (including EMI for
(basic standard)
(basic standard) industrial environment)
industrial control systems
industrial control systems industrial environment)
Key
(yellow) safety-related standards
(blue) fieldbus-related standards
(dashed yellow) this standard
Figure 1 – Relationships of IEC 61784-3 with other standards (machinery)

61784-3-1 © IEC:2007(E) – 9 –
Figure 2 shows the relationships between this standard and relevant safety and fieldbus
standards in a process environment.
Product standards
IEC 61496 IEC 61131-6 IEC 61800-5-2
IEC 61496 IEC 61131-6 IEC 61800-5-2
Safety f. e.g. Safety for Safety functions
Safety for PLC
Safety f. e.g. Safety for Safety functions
light curtains (under coPLnsiCderation) for drives
light curtains PLC for drives
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)
IEC 61511 series (3 parts = modified
IEC 61511 series (3 parts = modified
Functional safety – IEC 61511)
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
Functional safety
Fieldbus for use in
Functional safety
Fieldbus for use in DE: VDI 2180
DE: VDI 2180
process industry sector
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 communication profile.
The resulting SIL claim of a system depends on the implementation of the selected functional
safety communication profile within this system – implementation of a functional safety
communication profile in a standard device is not sufficient to qualify it as a safety device.

– 10 – 61784-3-1 © IEC:2007(E)
This standard describes
⎯ basic principles for implementing the requirements of IEC 61508 series for safety-
related data communications, including possible transmission faults, remedial
measures and considerations affecting data integrity;
⎯ individual description of functional safety profiles for several communication profile
families in IEC 61784-1 and IEC 61784-2;
⎯ safety layer extensions to the communication service and protocols sections of the
IEC 61158 series.
61784-3-1 © IEC:2007(E) – 11 –
INDUSTRIAL COMMUNICATION NETWORKS – PROFILES

Part 3-1: Functional safety fieldbuses – Additional specifications
for CPF 1
1 Scope
This part of the IEC 61784-3 series specifies a safety communication layer (services and
protocol) based on CPF 1 of IEC 61784-1 and IEC 61158 Type 1 and 9. It identifies the
principles for functional safety communications defined in IEC 61784-3 that are relevant for
this safety communication layer.
NOTE 1 It does not cover electrical safety and intrinsic safety aspects. Electrical safety relates to hazards such
as electrical shock. Intrinsic safety relates to hazards associated with potentially explosive atmospheres.
This part defines mechanisms for the transmission of safety-relevant messages among
participants within a distributed network using fieldbus technology in accordance with the
requirements of IEC 61508 series for functional safety. These mechanisms may be used in
various industrial applications such as process control, manufacturing automation and
machinery.
This part provides guidelines for both developers and assessors of compliant devices and
systems.
NOTE 2 The resulting SIL claim of a system depends on the implementation of the selected functional safety
communication profile within this system – implementation of a functional safety communication profile according to
this part in a standard device is not sufficient to qualify it as a safety device.
2 Normative references
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.
IEC 61131-2, Programmable controllers – Part 2: Equipment requirements and tests
IEC 61158-2, Industrial communication networks – Fieldbus specifications – Part 2: Physical
layer specification and service definition
IEC 61158-3-1, Industrial communication networks – Fieldbus specifications – Part 3-1: Data-
link layer service definition – Type 1 elements
IEC 61158-4-1, Industrial communication networks – Fieldbus specifications – Part 4-1: Data-
link layer protocol specification – Type 1 elements
IEC 61158-5-5, Industrial communication networks – Field
...