IEC 61784-3-12:2010

Industrial communication networks - Profiles - Part 3-12: Functional safety fieldbuses - Additional specifications for CPF 12

IEC 61784-3-12:2010 specifies a safety communication layer (services and protocol) based on CPF 12 of IEC 61784-2 and IEC 61158 Type 12. It identifies the principles for functional safety communications defined in IEC 61784-3 that are relevant for this safety communication layer. This bilingual version (2012-02) corresponds to the monolingual English version, published in 2010-06.

Réseaux de communication industriels - Profils - Partie 3-12: Bus de terrain de sécurité fonctionnelle - Spécifications supplémentaires pour CPF 12

La CEI 61784-3-12:2010 spécifie une couche de communication relative à la sécurité (services et protocole) fondée sur la CPF 12 de la CEI 61784-2 et le type 12 de la CEI 61158. Elle identifie les principes applicables aux communications de sécurité fonctionnelle définies dans la CEI 61784-3, et appropriés à cette couche de communication de sécurité. La présente version bilingue (2012-02) correspond à la version anglaise monolingue publiée en 2010-06.

General Information

• Status: Published
• Publication Date: 28-Jun-2010
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 19.040 - Environmental testing
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.05 - Multilayer applications
• Technical Committee: SC 65C - Industrial networks
• Drafting Committee: WG 12 - TC 65/SC 65C/WG 12
• Current Stage: PPUB - Publication issued
• Start Date: 15-Jun-2010
• Completion Date: 29-Jun-2010

Relations

• Amended By: IEC 61784-3-12:2010/AMD1:2019 - Amendment 1 - Industrial communication networks - Profiles - Part 3-12: Functional safety fieldbuses - Additional specifications for CPF 12
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61784-3-12 ®
Edition 1.0 2010-06
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Profiles –
Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: [e-mail]
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: [e-mail]
Tel.: [phone]
Fax: [phone]
IEC 61784-3-12 ®
Edition 1.0 2010-06
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Profiles –
Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XD
ICS 25.040.40; 35.100.05 ISBN 978-2-88910-981-4
– 2 – 61784-3-12 © IEC:2010(E)
CONTENTS
FOREWORD.6
0 Introduction .8
0.1 General .8
0.2 Patent declaration .10
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 12: Additional terms and definitions .17
3.2 Symbols and abbreviated terms.17
3.2.1 Common symbols and abbreviated terms .17
3.2.2 CPF 12: Additional symbols and abbreviated terms .18
3.3 Conventions .18
4 Overview of FSCP 12/1 (Safety-over-EtherCAT™) .18
5 General .20
5.1 External document providing specifications for the profile.20
5.2 Safety functional requirements .20
5.3 Safety measures .21
5.4 Safety communication layer structure .21
5.5 Relationships with FAL (and DLL, PhL) .22
5.5.1 General .22
5.5.2 Data types .22
6 Safety communication layer services .22
6.1 FSoE Connection .22
6.2 FSoE Cycle .22
6.3 FSoE services .23
7 Safety communication layer protocol .24
7.1 Safety PDU format .24
7.1.1 Safety PDU structure.24
7.1.2 Safety PDU command.25
7.1.3 Safety PDU CRC .25
7.2 FSCP 12/1 communication procedure.29
7.2.1 Message cycle.29
7.2.2 FSCP 12/1 node states.29
7.3 Reaction on communication errors .39
7.4 State table for FSoE Master .40
7.4.1 FSoE Master state machine.40
7.4.2 Reset state .44
7.4.3 Session state.45
7.4.4 Connection state .48
7.4.5 Parameter state.52
7.4.6 Data state.55
7.5 State table for FSoE Slave .58
7.5.1 FSoE Slave state machine.58
7.5.2 Reset state .62

61784-3-12 © IEC:2010(E) – 3 –
7.5.3 Session state.64
7.5.4 Connection state .68
7.5.5 Parameter state.73
7.5.6 Data state.78
8 Safety communication layer management.81
8.1 FSCP 12/1 parameter handling.81
8.2 FSoE communication parameters .81
9 System requirements.82
9.1 Indicators and switches .82
9.1.1 Indicator states and flash rates.82
9.1.2 Indicators .83
9.2 Installation guidelines.84
9.3 Safety function response time .84
9.3.1 General .84
9.3.2 Determination of FSoE Watchdog time .85
9.3.3 Calculation of the worst case safety function response time .86
9.4 Duration of demands .87
9.5 Constraints for calculation of system characteristics.87
9.5.1 General .87
9.5.2 Probabilistic considerations .87
9.6 Maintenance.89
9.7 Safety manual .89
10 Assessment.89
Annex A (informative) Additional information for functional safety communication
profiles of CPF 12.90
A.1 Hash function calculation.90
A.2 … .94
Annex B (informative) Information for assessment of the functional safety
communication profiles of CPF 12.95
Bibliography.96

Table 1 – State machine description elements .18
Table 2 – Communication errors and detection measures .21
Table 3 – General Safety PDU .24
Table 4 – Shortest Safety PDU .25
Table 5 – Safety PDU command .25
Table 6 – CRC_0 calculation sequence.26
Table 7 – CRC_i calculation sequence (i>0) .26
Table 8 – Example for CRC_0 inheritance .27
Table 9 – Example for 4 octets of safety data with interchanging of octets 1-4 with 5-8.28
Table 10 – Safety Master PDU for 4 octets of safety data with command = Reset after
restart (reset connection) or error .31
Table 11 – Safety Slave PDU for 4 octets of safety data with command = Reset for
acknowledging a Reset command from the FSoE Master .31
Table 12 – Safety Slave PDU for 4 octets of safety data with command = Reset after
restart (reset connection) or error .32

– 4 – 61784-3-12 © IEC:2010(E)
Table 13 – Safety Master PDU for 4 octets of safety data with command = Session.32
Table 14 – Safety Slave PDU for 4 octets of safety data with command = Session.33
Table 15 – Safety data transferred in the connection state.33
Table 16 – Safety Master PDU for 4 octets of safety data in Connection state .34
Table 17 – Safety Slave PDU for 4 octets of safety data in Connection state .34
Table 18 – Safety data transferred in the parameter state.35
Table 19 – First Safety Master PDU for 4 octets of safety data in parameter state .35
Table 20 – First Safety Slave PDU for 4 octets of safety data in parameter state .36
Table 21 – Second Safety Master PDU for 4 octets of safety data in parameter state .36
Table 22 – Second Safety Slave PDU for 4 octets of safety data in parameter state .37
Table 23 – Safety Master PDU for 4 octets of ProcessData in data state .37
Table 24 – Safety Slave PDU for 4 octets of ProcessData in data state .
...

IEC 61784-3-12 ®
Edition 1.1 2019-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Profiles –
Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 61784-3-12 ®
Edition 1.1 2019-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Profiles –

Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-7603-7

IEC 61784-3-12 ®
Edition 1.1 2019-11
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Industrial communication networks – Profiles –
Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12

– 2 – IEC 61784-3-12:2010+AMD1:2019 CSV
 IEC 2019
CONTENTS
FOREWORD . 6
0 Introduction . 8
0.1 General . 8
0.2 Patent declaration . 10
INTRODUCTION to Amendment 1 . 10
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 12: Additional terms and definitions . 17
3.2 Symbols and abbreviated terms. 17
3.2.1 Common symbols and abbreviated terms . 17
3.2.2 CPF 12: Additional symbols and abbreviated terms . 18
3.3 Conventions . 18
4 Overview of FSCP 12/1 (Safety-over-EtherCAT™) . 18
5 General . 20
5.1 External document providing specifications for the profile . 20
5.2 Safety functional requirements . 20
5.3 Safety measures . 21
5.4 Safety communication layer structure . 21
5.5 Relationships with FAL (and DLL, PhL) . 22
5.5.1 General . 22
5.5.2 Data types . 22
6 Safety communication layer services . 22
6.1 FSoE Connection . 22
6.2 FSoE Cycle . 22
6.3 FSoE services . 23
7 Safety communication layer protocol . 24
7.1 Safety PDU format . 24
7.1.1 Safety PDU structure . 24
7.1.2 Safety PDU command. 25
7.1.3 Safety PDU CRC . 25
7.2 FSCP 12/1 communication procedure . 29
7.2.1 Message cycle . 29
7.2.2 FSCP 12/1 node states . 29
7.3 Reaction on communication errors . 39
7.4 State table for FSoE Master . 40
7.4.1 FSoE Master state machine . 40
7.4.2 Reset state . 44
7.4.3 Session state . 45
7.4.4 Connection state . 48
7.4.5 Parameter state . 52
7.4.6 Data state . 55
7.5 State table for FSoE Slave . 58

 IEC 2019
7.5.1 FSoE Slave state machine . 58
7.5.2 Reset state . 62
7.5.3 Session state . 64
7.5.4 Connection state . 68
7.5.5 Parameter state . 73
7.5.6 Data state . 78
8 Safety communication layer management . 81
8.1 FSCP 12/1 parameter handling . 81
8.2 FSoE communication parameters . 81
9 System requirements . 82
9.1 Indicators and switches . 82
9.1.1 Indicator states and flash rates . 82
9.1.2 Indicators . 83
9.2 Installation guidelines . 84
9.3 Safety function response time . 84
9.3.1 General . 84
9.3.2 Determination of FSoE Watchdog time . 85
9.3.3 Calculation of the worst case safety function response time . 86
9.4 Duration of demands . 87
9.5 Constraints for calculation of system characteristics . 87
9.5.1 General . 87
9.5.2 Probabilistic considerations . 87
9.6 Maintenance . 89
9.7 Safety manual . 89
10 Assessment . 89
Annex A (informative) Additional information for functional safety communication
profiles of CPF 12 . 90
Annex B (informative) Information for assessment of the functional safety
communication profiles of CPF 12 . 95
Bibliography . 96

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 – Basic FSCP 12/1 system . 19
Figure 4 – FSCP 12/1 software architecture . 21
Figure 5 – FSoE Cycle . 23
Figure 6 – FSCP 12/1 communication structure . 23
Figure 7 – Safety PDU for CPF 12 embedded in Type 12 PDU . 24
Figure 8 – FSCP 12/1 node states . 30
Figure 9 – State diagram for FSoE Master . 41
Figure 10 – State diagram for FSoE Slave . 59
Figure 11 – Indicator flash rates . 83
Figure 12 – Components of a safety function . 84
Figure 13 – Calculation of the FSoE Watchdog times for input and output connections . 85
Figure 14 – Calculation of the worst case safety function response time . 86
Figure 15 – Safety PDU embedded in standard PDU . 88

– 4 – IEC 61784-3-12:2010+AMD1:2019 CSV
 IEC 2019
Figure 16 – Residual error rate for 8/16/24 bit safety data and up to 12 144 bit
standard data. 89

Table 1 – State machine description elements . 18
Table 2 – Communication
...

IEC 61784-3-12 ®
Edition 1.0 2010-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –
Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12

Réseaux de communication industriels – Profils –
Partie 3-12: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 12
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les
microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.

IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: [e-mail].

A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.

Liens utiles:
Recherche de publications CEI - www.iec.ch/searchpub Electropedia - www.electropedia.org
La recherche avancée vous permet de trouver des Le premier dictionnaire en ligne au monde de termes
publications CEI en utilisant différents critères (numéro de électroniques et électriques. Il contient plus de 30 000
référence, texte, comité d’études,…). termes et définitions en anglais et en français, ainsi que
Elle donne aussi des informations sur les projets et les les termes équivalents dans les langues additionnelles.
publications remplacées ou retirées. Egalement appelé Vocabulaire Electrotechnique
International (VEI) en ligne.
Just Published CEI - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications de la CEI.
Just Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur
Disponible en ligne et aussi une fois par mois par email. cette publication ou si vous avez des questions
contactez-nous: [e-mail].
IEC 61784-3-12 ®
Edition 1.0 2010-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –

Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12

Réseaux de communication industriels – Profils –

Partie 3-12: Bus de terrain de sécurité fonctionnelle – Spécifications

supplémentaires pour CPF 12
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XD
ICS 25.040.40, 35.100.05 ISBN 978-2-88912-944-7

– 2 – 61784-3-12  IEC:2010
CONTENTS
FOREWORD . 6
0 Introduction . 8
0.1 General . 8
0.2 Patent declaration . 10
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 12: Additional terms and definitions . 17
3.2 Symbols and abbreviated terms. 17
3.2.1 Common symbols and abbreviated terms . 17
3.2.2 CPF 12: Additional symbols and abbreviated terms . 18
3.3 Conventions . 18
4 Overview of FSCP 12/1 (Safety-over-EtherCAT™) . 18
5 General . 20
5.1 External document providing specifications for the profile . 20
5.2 Safety functional requirements . 20
5.3 Safety measures . 21
5.4 Safety communication layer structure . 21
5.5 Relationships with FAL (and DLL, PhL) . 22
5.5.1 General . 22
5.5.2 Data types . 22
6 Safety communication layer services . 22
6.1 FSoE Connection . 22
6.2 FSoE Cycle . 22
6.3 FSoE services . 23
7 Safety communication layer protocol . 24
7.1 Safety PDU format . 24
7.1.1 Safety PDU structure . 24
7.1.2 Safety PDU command. 25
7.1.3 Safety PDU CRC . 25
7.2 FSCP 12/1 communication procedure . 29
7.2.1 Message cycle . 29
7.2.2 FSCP 12/1 node states . 29
7.3 Reaction on communication errors . 39
7.4 State table for FSoE Master . 40
7.4.1 FSoE Master state machine . 40
7.4.2 Reset state . 44
7.4.3 Session state . 45
7.4.4 Connection state . 48
7.4.5 Parameter state . 52
7.4.6 Data state . 55
7.5 State table for FSoE Slave . 58
7.5.1 FSoE Slave state machine . 58
7.5.2 Reset state . 62

61784-3-12  IEC:2010 – 3 –
7.5.3 Session state . 64
7.5.4 Connection state . 68
7.5.5 Parameter state . 73
7.5.6 Data state . 78
8 Safety communication layer management . 81
8.1 FSCP 12/1 parameter handling . 81
8.2 FSoE communication parameters . 81
9 System requirements . 82
9.1 Indicators and switches . 82
9.1.1 Indicator states and flash rates . 82
9.1.2 Indicators . 83
9.2 Installation guidelines . 84
9.3 Safety function response time . 84
9.3.1 General . 84
9.3.2 Determination of FSoE Watchdog time . 85
9.3.3 Calculation of the worst case safety function response time . 86
9.4 Duration of demands . 87
9.5 Constraints for calculation of system characteristics . 87
9.5.1 General . 87
9.5.2 Probabilistic considerations . 87
9.6 Maintenance . 89
9.7 Safety manual . 89
10 Assessment . 89
Annex A (informative) Additional information for functional safety communication
profiles of CPF 12 . 90
A.1 Hash function calculation . 90
A.2 … . 94
Annex B (informative) Information for assessment of the functional safety
communication profiles of CPF 12 . 95
Bibliography . 96

Table 1 – State mac
...

IEC 61784-3-12 ®
Edition 1.1 2019-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –
Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12

Réseaux de communication industriels – Profils –
Partie 3-12: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 12
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and definitions clause of
IEC publications issued between 2002 and 2015. Some
IEC Customer Service Centre - webstore.iec.ch/csc entries have been collected from earlier publications of IEC
If you wish to give us your feedback on this publication or TC 37, 77, 86 and CISPR.

need further assistance, please contact the Customer Service

Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC - Electropedia - www.electropedia.org
webstore.iec.ch/advsearchform Le premier dictionnaire d'électrotechnologie en ligne au
La recherche avancée permet de trouver des publications IEC monde, avec plus de 22 000 articles terminologiques en
en utilisant différents critères (numéro de référence, texte, anglais et en français, ainsi que les termes équivalents dans
comité d’études,…). Elle donne aussi des informations sur les 16 langues additionnelles. Egalement appelé Vocabulaire
projets et les publications remplacées ou retirées. Electrotechnique International (IEV) en ligne.

IEC Just Published - webstore.iec.ch/justpublished Glossaire IEC - std.iec.ch/glossary
Restez informé sur les nouvelles publications IEC. Just 67 000 entrées terminologiques électrotechniques, en anglais
Published détaille les nouvelles publications parues. et en français, extraites des articles Termes et définitions des
Disponible en ligne et une fois par mois par email. publications IEC parues entre 2002 et 2015. Plus certaines
entrées antérieures extraites des publications des CE 37, 77,
Service Clients - webstore.iec.ch/csc 86 et CISPR de l'IEC.

Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
[e-mail].
IEC 61784-3-12 ®
Edition 1.1 2019-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –

Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12

Réseaux de communication industriels – Profils –

Partie 3-12: Bus de terrain de sécurité fonctionnelle – Spécifications

supplémentaires pour CPF 12
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-7994-6

IEC 61784-3-12 ®
Edition 1.1 2019-11
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Industrial communication networks – Profiles –
Part 3-12: Functional safety fieldbuses – Additional specifications for CPF 12

Réseaux de communication industriels – Profils –
Partie 3-12: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 12
– 2 – IEC 61784-3-12:2010+AMD1:2019 CSV
 IEC 2019
CONTENTS
FOREWORD . 6
0 Introduction . 8
0.1 General . 8
0.2 Patent declaration . 10
INTRODUCTION to Amendment 1 . 10
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 12: Additional terms and definitions . 17
3.2 Symbols and abbreviated terms. 17
3.2.1 Common symbols and abbreviated terms . 17
3.2.2 CPF 12: Additional symbols and abbreviated terms . 18
3.3 Conventions . 18
4 Overview of FSCP 12/1 (Safety-over-EtherCAT™) . 18
5 General . 20
5.1 External document providing specifications for the profile . 20
5.2 Safety functional requirements . 20
5.3 Safety measures . 21
5.4 Safety communication layer structure . 21
5.5 Relationships with FAL (and DLL, PhL) . 22
5.5.1 General . 22
5.5.2 Data types . 22
6 Safety communication layer services . 22
6.1 FSoE Connection . 22
6.2 FSoE Cycle . 22
6.3 FSoE services . 23
7 Safety communication layer protocol . 24
7.1 Safety PDU format . 24
7.1.1 Safety PDU structure . 24
7.1.2 Safety PDU command. 25
7.1.3 Safety PDU CRC . 25
7.2 FSCP 12/1 communication procedure . 29
7.2.1 Message cycle . 29
7.2.2 FSCP 12/1 node states . 29
7.3 Reaction on communication errors . 39
7.4 State table for FSoE Master . 40
7.4.1 FSoE Master state machine . 40
7.4.2 Reset state . 44
7.4.3 Session state . 45
7.4.4 Connection state . 48
7.4.5 Parameter state . 52
7.4.6 Data state . 55
7.5 State table for FSoE Slave . 58

 IEC 2019
7.5.1 FSoE Slave state machine . 58
7.5.2 Reset state . 62
7.5.3 Session state . 64
7.5.4 Connection state . 68
7.5.5 Parameter state . 73
7.5.6 Data state . 78
8 Safety communication layer management . 81
8.1 FSCP 12/1 parameter handling . 81
8.2 FSoE communication parameters . 81
System requirements . 82
9.1 Indicators and switches . 82
9.1.1 Indicator states and flash rates . 82
9.1.2 Indicators . 83
9.2 Installation guidelines . 84
9.3 Safety function response time . 84
9.3.1 General . 84
9.3.2 Determination of FSoE Watchdog time . 85
9.3.3 Calculation of the worst case safety function response time . 86
9.4 Duration of demands . 87
9.5 Constraints for calculation of system characteristics . 87
9.5.1 General . 87
9.5.2 Probabilistic considerations . 87
...