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

IEC 61784-3-3:2016 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. This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Legacy V1-mode removed from this protocol edition;
- Protocol extensions to protect against possible loopbacks (LP extensions);
- Protocol extensions to keep SIL3 for safety networks with large numbers of participants (XP extensions) and subsequent new F-Parameter "F_CRC_Seed";
- Introduction of random and disjoint Codename based MonitoringNumbers (MNR) besides to the previous Consecutive Numbers;
- Provisions for Channel Granular Passivation and subsequent new F-Parameter "F_Passivation";
- GSD extensions due to new F-Parameters;
- Notations according to the CP3 family in IEC 61158 (e.g. IO Controller);
- Additional diagnosis message types;
- Diverse error corrections and fixes of typos;
- Updated documents in bibliography.

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

L'IEC 61784-3-3:2016 spécifie une couche de communication relative à la sécurité (services et protocole) fondée 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, et appropriés à cette couche de communication de sécurité. Cette couche de communication de sécurité est destinée à être mise en oeuvre uniquement sur les appareils de sécurité. Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Mode V1 hérité supprimé de la présente édition de protocole;
- Extensions de protocoles afin d'assurer une protection contre les bouclages potentiels (extensions LP);
- Extensions de protocoles afin de conserver SIL3 pour les réseaux de sécurité avec de très nombreux participants (extensions XP) et le nouveau paramètre F "F_CRC_Seed" ultérieur;
- Introduction de MonitoringNumbers (MNR) aléatoires et disjoints basés sur le nom de code (Codename) outre les numéros consécutifs précédents;
- Dispositions concernant la passivation granulaire des canaux (Channel Granular Passivation) et le nouveau Paramètre F "F_Passivation" ultérieur;
- Extensions GSD dues aux nouveaux paramètres F;
- Notations selon la famille CP3 dans l'IEC 61158 (par exemple, contrôleur d'entrée-sortie);
- Types de messages de diagnostic supplémentaires;
- Diverses corrections d'erreurs et corrections de typographies;
- Documents mis à jour dans la bibliographie.

General Information

Status
Published
Publication Date
11-Jul-2016
Technical Committee
Current Stage
DELPUB - Deleted Publication
Completion Date
05-May-2021
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IEC 61784-3-3
Edition 3.0 2016-07
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 61784-3-3:2016-07(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61784-3-3
Edition 3.0 2016-07
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 978-2-8322-3481-5

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 61784-3-3:2016  IEC 2016
CONTENTS

FOREWORD ......................................................................................................................... 8

0 Introduction ................................................................................................................. 10

0.1 General ............................................................................................................... 10

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 ........................................................................... 26

3.2.1 Common symbols and abbreviated terms ...................................................... 26

3.2.2 CPF 3: Additional symbols and abbreviated terms ......................................... 27

3.3 Conventions ........................................................................................................ 28

4 Overview of FSCP 3/1 (PROFIsafe™) .......................................................................... 28

5 General ....................................................................................................................... 31

5.1 External documents providing specifications for the profile ................................... 31

5.2 Safety functional requirements ............................................................................ 31

5.3 Safety measures ................................................................................................. 31

5.4 Safety communication layer structure .................................................................. 32

5.4.1 Principle of FSCP 3/1 safety communications ............................................... 32

5.4.2 CPF 3 communication structures .................................................................. 33

5.5 Relationships with FAL (and DLL, PhL) ................................................................ 36

5.5.1 Device model ............................................................................................... 36

5.5.2 Application and communication relationships ................................................ 37

5.5.3 Data types ................................................................................................... 37

6 Safety communication layer services ............................................................................ 38

6.1 F-Host services ................................................................................................... 38

6.2 F-Device services................................................................................................ 41

6.3 Diagnosis ............................................................................................................ 43

6.3.1 Safety alarm generation ............................................................................... 43

6.3.2 F-Device safety layer diagnosis including the iPar-Server ............................. 43

7 Safety communication layer protocol ............................................................................ 44

7.1 Safety PDU format .............................................................................................. 44

7.1.1 Safety PDU structure ................................................................................... 44

7.1.2 Safety IO data .............................................................................................. 45

7.1.3 Status and Control Byte ............................................................................... 45

7.1.4 (Virtual) MonitoringNumber .......................................................................... 47

7.1.5 (Virtual) MNR mechanism (F_CRC_Seed=0) ................................................. 48

7.1.6 (Virtual) MNR mechanism (F_CRC_Seed=1) ................................................. 48

7.1.7 CRC2 Signature (F_CRC_Seed=0) ............................................................... 50

7.1.8 CRC2 Signature (F_CRC_Seed=1) ............................................................... 51

7.1.9 Non-safety IO data ....................................................................................... 52

7.2 FSCP 3/1 behavior .............................................................................................. 52

7.2.1 General ....................................................................................................... 52

---------------------- Page: 4 ----------------------
IEC 61784-3-3:2016  IEC 2016 – 3 –

7.2.2 F-Host state diagram .................................................................................... 53

7.2.3 F-Device state diagram ................................................................................ 56

7.2.4 Sequence diagrams ..................................................................................... 60

7.2.5 Timing diagram for a MonitoringNumber reset ............................................... 66

7.2.6 Monitoring of safety times ............................................................................ 66

7.3 Reaction in the event of a malfunction ................................................................. 69

7.3.1 Unintended repetition ................................................................................... 69

7.3.2 Loss ............................................................................................................ 70

7.3.3 Insertion ...................................................................................................... 70

7.3.4 Incorrect sequence ...................................................................................... 70

7.3.5 Corruption of safety data .............................................................................. 70

7.3.6 Unacceptable delay ...................................................................................... 70

7.3.7 Masquerade ................................................................................................. 70

7.3.8 Addressing................................................................................................... 71

7.3.9 Memory failures within switches ................................................................... 71

7.3.10 Loop-back .................................................................................................... 72

7.3.11 Network boundaries and router ..................................................................... 72

7.4 F-Startup and parameter change at runtime ......................................................... 73

7.4.1 Standard startup procedure .......................................................................... 73

7.4.2 iParameter assignment deblocking ............................................................... 73

8 Safety communication layer management ..................................................................... 73

8.1 F-Parameter ........................................................................................................ 73

8.1.1 Summary ..................................................................................................... 73

8.1.2 F_Source/Destination_Address (Codename) ................................................. 74

8.1.3 F_WD_Time (F-Watchdog time) .................................................................... 74

8.1.4 F_WD_Time_2 (secondary F-Watchdog time) ............................................... 75

8.1.5 F_Prm_Flag1 (Parameters for the safety layer management) ........................ 75

8.1.6 F_Prm_Flag2 (Parameters for the safety layer management) ........................ 77

8.1.7 F_iPar_CRC (value of iPar_CRC across iParameters) ................................... 78

8.1.8 F_Par_CRC calculation (across F-Parameters) ............................................. 79

8.1.9 Structure of the F-Parameter record data object ............................................ 79

8.2 iParameter and iPar_CRC ................................................................................... 79

8.3 Safety parameterization....................................................................................... 80

8.3.1 Objectives .................................................................................................... 80

8.3.2 GSDL and GSDML safety extensions ............................................................ 81

8.3.3 Securing safety parameters and GSD data ................................................... 83

8.4 Safety configuration ............................................................................................ 87

8.4.1 Securing the safety IO data description (CRC7) ............................................ 87

8.4.2 DataItem data type section examples ........................................................... 88

8.5 Data type information usage ................................................................................ 92

8.5.1 F-Channel driver .......................................................................................... 92

8.5.2 Rules for standard F-Channel drivers ........................................................... 93

8.5.3 Recommendations for F-Channel drivers ...................................................... 94

8.6 Safety parameter assignment mechanisms .......................................................... 95

8.6.1 F-Parameter assignment .............................................................................. 95

8.6.2 General iParameter assignment ................................................................... 95

8.6.3 System integration requirements for iParameterization tools ......................... 96

8.6.4 iPar-Server .................................................................................................. 98

9 System requirements ................................................................................................. 107

---------------------- Page: 5 ----------------------
– 4 – IEC 61784-3-3:2016  IEC 2016

9.1 Indicators and switches ..................................................................................... 107

9.2 Installation guidelines ........................................................................................ 107

9.3 Safety function response time ............................................................................ 107

9.3.1 Model ........................................................................................................ 107

9.3.2 Calculation and optimization ....................................................................... 109

9.3.3 Adjustment of watchdog times for FSCP 3/1 ............................................... 111

9.3.4 Engineering tool support ............................................................................ 112

9.3.5 Retries (repetition of messages) ................................................................. 112

9.4 Duration of demands ......................................................................................... 113

9.5 Constraints for the calculation of system characteristics ..................................... 114

9.5.1 Probabilistic considerations ........................................................................ 114

9.5.2 Safety related assumptions ........................................................................ 116

9.5.3 Non safety related constraints (availability) ................................................. 117

9.6 Maintenance ..................................................................................................... 117

9.6.1 F-Module commissioning / replacement ...................................................... 117

9.6.2 Identification and maintenance functions .................................................... 117

9.7 Safety manual ................................................................................................... 117

9.8 Wireless transmission channels ......................................................................... 119

9.8.1 Black channel approach ............................................................................. 119

9.8.2 Availability ................................................................................................. 119

9.8.3 Security measures ..................................................................................... 119

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

9.9 Conformance classes ........................................................................................ 122

10 Assessment ............................................................................................................... 124

10.1 Safety policy ..................................................................................................... 124

10.2 Obligations........................................................................................................ 124

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) .................................................. 129

A.3 Response time measurements ........................................................................... 130

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

communication profiles of CPF 3 ....................................................................................... 133

Bibliography ..................................................................................................................... 134

Figure 1 – Relationships of IEC 61784-3 with other standards (machinery) ........................... 10

Figure 2 – Relationships of IEC 61784-3 with other standards (process) .............................. 11

Figure 3 – Basic communication preconditions for FSCP 3/1 ................................................ 29

Figure 4 – Structure of an FSCP 3/1 safety PDU.................................................................. 29

Figure 5 – Safety communication on CPF 3 ......................................................................... 30

Figure 6 – Standard CPF 3 transmission system .................................................................. 32

Figure 7 – Safety layer architecture ..................................................................................... 33

Figure 8 – Basic communication layers ................................................................................ 34

Figure 9 – Multiport switch bus structure ............................................................................. 34

Figure 10 – Linear bus structure .......................................................................................... 35

Figure 11 – Crossing network borders with routers .............................................................. 35

Figure 12 – Complete safety transmission paths .................................................................. 36

---------------------- Page: 6 ----------------------
IEC 61784-3-3:2016  IEC 2016 – 5 –

Figure 13 – IO Device model ............................................................................................... 37

Figure 14 – FSCP 3/1 communication structure ................................................................... 38

Figure 15 – F user interface of F-Host driver instances ........................................................ 39

Figure 16 – Motivation for "Channel-related Passivation" ..................................................... 40

Figure 17 – F-Device driver interfaces ................................................................................. 42

Figure 18 – Safety PDU for CPF 3 ....................................................................................... 45

Figure 19 – Status Byte ...................................................................................................... 45

Figure 20 – Control Byte ..................................................................................................... 46

Figure 21 – The Toggle Bit function ..................................................................................... 47

Figure 22 – F-Device MonitoringNumber ............................................................................. 48

Figure 23 – F-Host CRC2 signature generation (F_CRC_Seed=0) ....................................... 50

Figure 24 – Details of the CRC2 signature calculation (F_CRC_Seed=0) ............................. 51

Figure 25 – CRC2 signature calculation (F_CRC_Seed=1) ................................................... 51

Figure 26 – Details of the CRC2 signature calculation (F_CRC_Seed=1) ............................. 52

Figure 27 – Safety layer communication relationship ........................................................... 52

Figure 28 – F-Host state diagram ........................................................................................ 53

Figure 29 – F-Device state diagram ..................................................................................... 57

Figure 30 – Interaction F-Host / F-Device during start-up ..................................................... 60

Figure 31 – Interaction F-Host / F-Device during F-Host power off → on .............................. 61

Figure 32 – Interaction F-Host / F-Device with delayed power on ......................................... 62

Figure 33 – Interaction F-Host / F-Device during power off → on .......................................... 63

Figure 34 – Interaction F-Host / F-Device while host recognizes CRC error .......................... 64

Figure 35 – Interaction F-Host / F-Device while device recognizes CRC error ....................... 65

Figure 36 – Impact of the MNR reset signal ......................................................................... 66

Figure 37 – Monitoring the message transit time F-Host ↔ F-Output .................................... 67

Figure 38 – Monitoring the message transit time F-Input ↔ F-Host ...................................... 67

Figure 39 – Extended watchdog time on request .................................................................. 69

Figure 40 – iParameter assignment deblocking by the F-Host .............................................. 73

Figure 41 – Effect of F_WD_Time_2 .................................................................................... 75

Figure 42 – F_Prm_Flag1.................................................................................................... 75

Figure 43 – F_Check_SeqNr ............................................................................................... 76

Figure 44 – F_Check_iPar................................................................................................... 76

Figure 45 – F_SIL ............................................................................................................... 76

Figure 46 – F_CRC_Length ................................................................................................. 77

Figure 47 – F_CRC_Seed ................................................................................................... 77

Figure 48 – F_Prm_Flag2.................................................................................................... 77

Figure 49 – F_Passivation ................................................................................................... 78

Figure 50 – F_Block_ID ...................................................................................................... 78

Figure 51 – F_Par_Version ................................................................................................. 78

Figure 52 – F-Parameter ..................................................................................................... 79

Figure 53 – iParameter block .............................................................................................. 80

Figure 54 – F-Parameter extension within the GSDML specification ..................................... 82

Figure 55 – F_Par_CRC signature including iPar_CRC ........................................................ 84

---------------------- Page: 7 ----------------------
– 6 – IEC 61784-3-3:2016  IEC 2016

Figure 56 – Algorithm to build CRC0 ................................................................................... 84

Figure 57 – GSD example in GSDML notation ..................................................................... 86

Figure 58 – DataItem section for F_IN_OUT_1 .................................................................... 89

Figure 59 – DataItem section for F_IN_OUT_2 .................................................................... 90

Figure 60 – DataItem section for F_IN_OUT_5 .................................................................... 91

Figure 61 – DataItem section for F_IN_OUT_6 .................................................................... 92

Figure 62 – F-Channel driver as "glue" between F-Device and user program ........................ 93

Figure 63 – Layout example of an F-Channel driver ............................................................. 94

Figure 64 – F-Parameter assignment for simple F-Devices and F-Slaves ............................. 95

Figure 65 – F and iParameter assignment for complex F-Devices ........................................ 96

Figure 66 – System integration of CPD-Tools ...................................................................... 97

Figure 67 – iPar-Server mechanism (commissioning) ........................................................... 98

Figure 68 – iPar-Server mechanism (for example F-Device replacement) ............................. 99

Figure 69 – iPar-Server request coding ("status model") ...............................

...

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