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

IEC 61784-3-3:2021 specifies a safety communication layer (services and protocol) based on CPF 3 of IEC 61784-1, IEC 61784-2 (CP 3/1, CP 3/2, CP 3/4, CP 3/5 and CP 3/6) and IEC 61158 Types 3 and 10. It identifies the principles for functional safety communications defined in IEC 61784-3 that are relevant for this safety communication layer. This safety communication layer is intended for implementation in safety devices only.
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 document 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 (all parts) for functional safety. These mechanisms may be used in various industrial applications such as process control, manufacturing automation and machinery.
This document 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 document in a standard device is not sufficient to qualify it as a safety device.

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

L'IEC 61784-3-3:2021 spécifie une couche de communication de sécurité (services et protocole) qui repose sur la CPF 3 de l'IEC 61784-1 et les Types 3 et 10 de l'IEC 61784-2 (CP 3/1, CP 3/2, CP 3/4, CP 3/5 et CP 3/6) et de l'IEC 61158. Elle identifie les principes applicables aux communications de sécurité fonctionnelle définies dans l'IEC 61784-3, qui correspondent à cette couche de communication de sécurité. Cette couche de communication de sécurité est destinée à être mise en œuvre uniquement sur les appareils de sécurité.
NOTE 1 Elle ne couvre pas les aspects relatifs à la sécurité électrique et à la sécurité intrinsèque. La sécurité électrique concerne les dangers tels que les chocs électriques. La sécurité intrinsèque concerne les dangers associés aux atmosphères explosibles.
Le présent document définit les mécanismes de transmission des messages relatifs à la sécurité entre les participants d'un réseau réparti, en utilisant la technologie de bus de terrain conformément aux exigences de la série IEC 61508 (toutes les parties) concernant la sécurité fonctionnelle. Ces mécanismes peuvent être utilisés dans différentes applications industrielles, par exemple la commande de processus, l'usinage automatique et les machines.
Le présent document fournit des lignes directrices aux développeurs, ainsi qu'aux évaluateurs d'appareils et de systèmes conformes.
NOTE 2 La revendication du SIL qui en résulte pour un système dépend de la mise en œuvre du profil de communication de sécurité fonctionnelle retenu au sein du système (la mise en œuvre d'un profil de communication de sécurité fonctionnelle conforme au présent document dans un appareil normal ne suffit pas à le qualifier d'appareil de sécurité).

General Information

Status
Published
Publication Date
04-May-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
05-May-2021
Ref Project

Buy Standard

Standard
IEC 61784-3-3:2021 - Industrial communication networks - Profiles - Part 3-3: Functional safety fieldbuses - Additional specifications for CPF 3
English and French language
300 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 61784-3-3
Edition 4.0 2021-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –
Part 3-3: Functional safety fieldbuses – Additional specifications for CPF 3
Réseaux de communication industriels – Profils –
Partie 3-3: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 3
IEC 61784-3-3:2021-05(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2021 IEC, Geneva, Switzerland

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.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
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: sales@iec.ch.
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 - IEC online collection - oc.iec.ch

webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez

La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications. Avec un

en utilisant différents critères (numéro de référence, texte, abonnement, vous aurez toujours accès à un contenu à jour

comité d’études, …). Elle donne aussi des informations sur adapté à vos besoins.
les projets et les publications remplacées ou retirées.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au
Restez informé sur les nouvelles publications IEC. Just
monde, avec plus de 22 000 articles terminologiques en
Published détaille les nouvelles publications parues.
anglais et en français, ainsi que les termes équivalents dans
Disponible en ligne et une fois par mois par email.
16 langues additionnelles. Egalement appelé Vocabulaire
Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 61784-3-3
Edition 4.0 2021-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –
Part 3-3: Functional safety fieldbuses – Additional specifications for CPF 3
Réseaux de communication industriels – Profils –
Partie 3-3: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 3
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-9749-0

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

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

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61784-3-3:2021  IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 9

0 Introduction ................................................................................................................... 11

0.1 General ................................................................................................................. 11

0.2 Patent declaration ................................................................................................. 12

1 Scope ............................................................................................................................ 14

2 Normative references .................................................................................................... 14

3 Terms, definitions, symbols, abbreviated terms and conventions ................................... 16

3.1 Terms and definitions ............................................................................................ 16

3.1.1 Common terms and definitions ....................................................................... 16

3.1.2 CPF 3: Additional terms and definitions ......................................................... 22

3.2 Symbols and abbreviated terms ............................................................................ 27

3.2.1 Common symbols and abbreviated terms ....................................................... 27

3.2.2 CPF 3: Additional symbols and abbreviated terms ......................................... 28

3.3 Conventions .......................................................................................................... 29

4 Overview of FSCP 3/1 (PROFIsafe™)............................................................................ 29

5 General ......................................................................................................................... 32

5.1 External documents providing specifications for the profile ................................... 32

5.2 Safety functional requirements .............................................................................. 32

5.3 Safety measures ................................................................................................... 32

5.4 Safety communication layer structure .................................................................... 33

5.4.1 Principle of FSCP 3/1 safety communications ................................................ 33

5.4.2 CPF 3 communication structures ................................................................... 35

5.5 Relationships with FAL (and DLL, PhL) ................................................................. 37

5.5.1 Device model ................................................................................................. 37

5.5.2 Application and communication relationships ................................................. 38

5.5.3 Data types ..................................................................................................... 38

6 Safety communication layer services ............................................................................. 39

6.1 F-Host driver services ........................................................................................... 39

6.2 F-Device driver services ....................................................................................... 43

6.3 Diagnosis .............................................................................................................. 45

6.3.1 Safety alarm generation ................................................................................. 45

6.3.2 F-(Sub)Module safety layer diagnosis ............................................................ 45

7 Safety communication layer protocol ............................................................................. 46

7.1 Safety PDU format ................................................................................................ 46

7.1.1 Safety PDU structure ..................................................................................... 46

7.1.2 Safety IO data ............................................................................................... 47

7.1.3 Status and Control Byte ................................................................................. 47

7.1.4 (Virtual) MonitoringNumber ............................................................................ 49

7.1.5 (Virtual) MNR mechanism (F_CRC_Seed=0) ................................................. 50

7.1.6 (Virtual) MNR mechanism (F_CRC_Seed=1) ................................................. 50

7.1.7 CRC2 Signature (F_CRC_Seed=0) ................................................................ 52

7.1.8 CRC2 Signature (F_CRC_Seed=1) ................................................................ 53

7.1.9 Non-safety IO data ........................................................................................ 54

7.2 FSCP 3/1 behavior ................................................................................................ 54

7.2.1 General ......................................................................................................... 54

---------------------- Page: 4 ----------------------
IEC 61784-3-3:2021  IEC 2021 – 3 –

7.2.2 F-Host driver state diagram ........................................................................... 55

7.2.3 F-Device driver state diagram ........................................................................ 58

7.2.4 F-Device driver restart ................................................................................... 62

7.2.5 Sequence diagrams ....................................................................................... 62

7.2.6 Timing diagram for a MonitoringNumber reset ............................................... 69

7.2.7 Monitoring of safety times .............................................................................. 69

7.3 Reaction in the event of a malfunction .................................................................. 72

7.3.1 Corruption of safety data ............................................................................... 72

7.3.2 Unintended repetition .................................................................................... 72

7.3.3 Incorrect sequence ........................................................................................ 73

7.3.4 Loss .............................................................................................................. 73

7.3.5 Unacceptable delay ....................................................................................... 73

7.3.6 Insertion ........................................................................................................ 73

7.3.7 Masquerade................................................................................................... 73

7.3.8 Addressing .................................................................................................... 73

7.3.9 Out-of-sequence ............................................................................................ 74

7.3.10 Loop-back...................................................................................................... 74

7.3.11 Network boundaries and router ...................................................................... 74

7.4 F-Startup and parameter change at runtime .......................................................... 75

7.4.1 Standard startup procedure ........................................................................... 75

8 Safety communication layer management ...................................................................... 75

8.1 F-Parameter.......................................................................................................... 75

8.1.1 Summary ....................................................................................................... 75

8.1.2 F_Source/Destination_Address (Codename) .................................................. 76

8.1.3 F_WD_Time (F-Watchdog time) ..................................................................... 77

8.1.4 F_WD_Time_2 (secondary F-Watchdog time) ................................................ 77

8.1.5 F_Prm_Flag1 (Parameters for the safety layer management) ......................... 77

8.1.6 F_Prm_Flag2 (Parameters for the safety layer management) ......................... 80

8.1.7 F_iPar_CRC (value of iPar_CRC across iParameters) ................................... 81

8.1.8 F_Par_CRC calculation (across F-Parameters) .............................................. 81

8.1.9 Structure of the F-Parameter record data object ............................................ 82

8.2 iParameter and iPar_CRC ..................................................................................... 82

8.3 Safety parameterization ........................................................................................ 83

8.3.1 Objectives ..................................................................................................... 83

8.3.2 GSDL and GSDML safety extensions ............................................................. 84

8.3.3 Securing safety parameters and GSD data .................................................... 86

8.4 Safety configuration .............................................................................................. 90

8.4.1 Order of IO data types ................................................................................... 90

8.4.2 Securing the safety IO data description ......................................................... 90

8.4.3 DataItem data type section examples ............................................................ 91

8.5 Data type information usage ................................................................................. 95

8.5.1 F-Host Channel driver .................................................................................... 95

8.5.2 Rules for standard F-Host Channel drivers .................................................... 96

8.5.3 Recommendations for the use of F-Host Channel drivers ............................... 97

8.6 Safety parameter assignment mechanisms ........................................................... 98

8.6.1 F-Parameter assignment ................................................................................ 98

8.6.2 General iParameter assignment ..................................................................... 98

8.6.3 System integration requirements for iParameterization tools .......................... 98

8.6.4 iPar-Server .................................................................................................. 100

---------------------- Page: 5 ----------------------
– 4 – IEC 61784-3-3:2021  IEC 2021

9 System requirements ................................................................................................... 111

9.1 Indicators and switches ....................................................................................... 111

9.2 Installation guidelines ......................................................................................... 111

9.3 Safety function response time ............................................................................. 111

9.3.1 Model .......................................................................................................... 111

9.3.2 Calculation and optimization ........................................................................ 113

9.3.3 Adjustment of watchdog times for FSCP 3/1 ................................................ 115

9.3.4 Engineering tool support .............................................................................. 116

9.3.5 Retries (repetition of messages) .................................................................. 116

9.4 Duration of demands ........................................................................................... 117

9.5 Constraints for the calculation of system characteristics ..................................... 117

9.5.1 Probabilistic considerations ......................................................................... 117

9.5.2 Safety related assumptions .......................................................................... 119

9.5.3 Non safety related constraints (availability) .................................................. 120

9.6 Maintenance ....................................................................................................... 120

9.6.1 F-(Sub)Module commissioning / replacement ............................................... 120

9.6.2 Identification and maintenance functions ..................................................... 120

9.7 Safety manual ..................................................................................................... 121

9.8 Wireless transmission channels .......................................................................... 122

9.8.1 Black channel approach ............................................................................... 122

9.8.2 Availability ................................................................................................... 122

9.8.3 Security measures ....................................................................................... 122

9.8.4 Stationary and mobile applications .............................................................. 122

9.9 Relationship between functional safety and security ........................................... 123

9.10 Conformance classes .......................................................................................... 123

10 Assessment ................................................................................................................. 125

10.1 Safety policy ....................................................................................................... 125

10.2 Obligations ......................................................................................................... 125

Annex A (informative) Additional information for functional safety communication

profiles of CPF 3 ................................................................................................................. 126

A.1 Hash function calculation .................................................................................... 126

A.2 Example values for MonitoringNumbers (MNR) ................................................... 130

Annex B (informative) Information for assessment of the functional safety

communication profiles of CPF 3......................................................................................... 131

Annex C (normative) Optional features .............................................................................. 132

C.1 Reaction on Device_Fault in F-Host .................................................................... 132

C.1.1 Situation ...................................................................................................... 132

C.1.2 Documentation for the user .......................................................................... 132

C.1.3 Optional extensions of F-Host driver Transition Table .................................. 132

C.1.4 Recommendation for the case without Extensions of F-Host driver

Transitions ................................................................................................... 135

C.2 Optional extensions of F-Host driver to "Disable F-(Sub)Module" ........................ 135

C.3 Combination of "Disable F-(Sub)Module" and "reaction on Device_Fault" ............ 139

C.4 FSCP 3/1 and PROFIenergy ............................................................................... 141

C.4.1 Use of FSCP 3/1-Devices with PROFIenergy ............................................... 141

C.4.2 Sequence in case of PROFIenergy power off on .......................................... 141

C.5 Requirement multiple F-Hosts communicate with single F-(Sub)Module .............. 141

C.6 FSCP 3/1 PiR ..................................................................................................... 142

Bibliography ........................................................................................................................ 143

---------------------- Page: 6 ----------------------
IEC 61784-3-3:2021  IEC 2021 – 5 –

Figure 1 – Relationships of IEC 61784-3 with other standards (machinery) ........................... 11

Figure 2 – Relationships of IEC 61784-3 with other standards (process) ............................... 12

Figure 3 – Basic communication preconditions for FSCP 3/1................................................. 30

Figure 4 – Structure of an FSCP 3/1 safety PDU ................................................................... 30

Figure 5 – Safety communication on CPF 3 .......................................................................... 31

Figure 6 – Standard CPF 3 transmission system ................................................................... 34

Figure 7 – Safety layer architecture ...................................................................................... 35

Figure 8 – Basic communication layers ................................................................................. 35

Figure 9 – Crossing network borders with routers ................................................................. 36

Figure 10 – Complete safety transmission paths ................................................................... 37

Figure 11 – IO Device model ................................................................................................. 38

Figure 12 – FSCP 3/1 communication structure .................................................................... 39

Figure 13 – F application interface of F-Host driver instances ............................................... 40

Figure 14 – Motivation for "Channel-related Passivation" ...................................................... 41

Figure 15 – F-Device driver interfaces .................................................................................. 43

Figure 16 – Safety PDU for CPF 3 ........................................................................................ 47

Figure 17 – Status Byte ........................................................................................................ 47

Figure 18 – Control Byte ....................................................................................................... 48

Figure 19 – The Toggle Bit function ...................................................................................... 49

Figure 20 – MonitoringNumber integration ............................................................................ 50

Figure 21 – F-Host driver CRC2 signature generation (F_CRC_Seed=0) .............................. 52

Figure 22 – Details of the CRC2 signature calculation (F_CRC_Seed=0) .............................. 53

Figure 23 – CRC2 signature calculation (F_CRC_Seed=1) ................................................... 53

Figure 24 – Details of the CRC2 signature calculation (F_CRC_Seed=1) .............................. 54

Figure 25 – Safety layer communication relationship ............................................................. 54

Figure 26 – F-Host driver state diagram ................................................................................ 55

Figure 27 – F-Device driver state diagram ............................................................................ 59

Figure 28 – Interaction F-Host driver / F-Device driver during start-up .................................. 63

Figure 29 – Interaction F-Host driver / F-Device driver during F-Host power off > on ............. 64

Figure 30 – Interaction F-Host driver / F-Device driver with delayed power on ...................... 65

Figure 31 – Interaction F-Host driver / F-Device driver during power off → on ....................... 66

Figure 32 – Interaction while F-Host driver recognizes CRC error ......................................... 67

Figure 33 – Interaction while F-Device driver recognizes CRC error ...................................... 68

Figure 34 – Impact of the MNR reset signal .......................................................................... 69

Figure 35 – Monitoring the message transit time F-Host ↔ F-(Sub)Module ........................... 70

Figure 36 – Extended watchdog time on request ................................................................... 72

Figure 37 – Effect of F_WD_Time_2 ..................................................................................... 77

Figure 38 – F_Prm_Flag1 ..................................................................................................... 78

Figure 39 – F_Check_iPar .................................................................................................... 78

Figure 40 – F_SIL ................................................................................................................. 78

Figure 41 – F_CRC_Length .................................................................................................. 79

Figure 42 – F_CRC_Seed ..................................................................................................... 79

---------------------- Page: 7 ----------------------
– 6 – IEC 61784-3-3:2021  IEC 2021

Figure 43 – F_Prm_Flag2 ..................................................................................................... 80

Figure 44 – F_Passivation .................................................................................................... 80

Figure 45 – F_Block_ID ........................................................................................................ 80

Figure 46 – F_Par_Version ................................................................................................... 81

Figure 47 – F-Parameter ....................................................................................................... 82

Figure 48 – iParameter block ................................................................................................ 83

Figure 49 – F-Parameter extension within the GSDML specification ...................................... 85

Figure 50 – F_Par_CRC signature including iPar_CRC ......................................................... 86

Figure 51 – F-Host Channel driver as "glue" between F-(Sub)Module and application

program ................................................................................................................................ 96

Figure 52 – Layout example of an F-Host Channel driver ...................................................... 97

Figure 53 – F-Parameter assignment for F-(Sub)Modules ..................................................... 98

Figure 54 – System integration of CPD-Tools ........................................................................ 99

Figure 55 – iPar-Server mechanism (commissioning) .......................................................... 100

Figure 56 – iPar-Server mechanism (for example F-(Sub)Module replacement) .................. 102

Figure 57 – iPar-Server request coding ("status model") ..................................................... 103

Figure 58 – Coding of SR_Type .......................................................................................... 104

Figure 59 – iPar-Server request cod
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.