Industrial communication networks - Profiles - Part 3-8: Functional safety fieldbuses - Additional specifications for CPF 8

IEC 61784-3-8:2016 specifies a safety communication layer (services and protocol) based on CPF 8 of IEC 61784-1, IEC 61784-2 and IEC 61158 Type 18 and Type 23. 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 second edition cancels and replaces the first edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Added FSCP 8/2;
- Added FSCP 8/2 Clause 12;
- Added content for FSCP 8/2 to Clauses 1 to 3 (scope, references, terms);
- Moved previous FSCP 8/1 to Clause 11 (demoting all old heading levels by one);
- Restructured old Clauses 4 to 10 to point to appropriate subclauses as appropriate.

Réseux de communication industriels - Profils - Partie 3-8: Bus de terrain de sécurité fonctionnelle - Spécifications supplémentaires pour CPF 8

L'IEC 61784-3-8:2016 spécifie une couche de communication de sécurité (services et protocole) reposant sur CPF 8 de l'IEC 61784-1, de l'IEC 61784-2 et de l'IEC 61158 Type 18 et Type 23. Elle identifie les principes en matière de communications de sécurité fonctionnelle définies dans l'IEC 61784-3 pertinents pour 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 deuxième édition annule et remplace la première édition, parue en 2010. Cette édition constitue une révision technique. Les modifications techniques majeures par rapport à l'édition précédente sont énumérées ci-dessous:
- FSCP 8/2 ajouté;
- FSCP 8/2, Article 12 ajouté;
- Contenu relatif à FSCP 8/2 ajouté aux Articles 1 à 3 (domaine d'application, références, termes);
- FSCP 8/1 précédent déplacé vers l'Article 11 (rétrogradant tous les anciens en-têtes d'un niveau);
- Anciens Articles 4 à 10 restructurés pour pointer vers les paragraphes appropriés, selon le cas.

General Information

Status
Published
Publication Date
27-Jul-2016
Technical Committee
Current Stage
DELPUB - Deleted Publication
Completion Date
19-May-2021
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IEC 61784-3-8
Edition 2.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –
Part 3-8: Functional safety fieldbuses – Additional specifications for CPF 8
Réseaux de communication industriels – Profils –
Partie 3-8: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 8
IEC 61784-3-8:2016-07(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61784-3-8
Edition 2.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –
Part 3-8: Functional safety fieldbuses – Additional specifications for CPF 8
Réseaux de communication industriels – Profils –
Partie 3-8: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 8
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40, 35.100.05 ISBN 978-2-8322-3491-4

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 61784-3-8:2016  IEC 2016
CONTENTS

FOREWORD ......................................................................................................................... 7

0 Introduction ................................................................................................................... 9

0.1 General ................................................................................................................. 9

0.2 Patent declaration ............................................................................................... 11

1 Scope .......................................................................................................................... 12

2 Normative references................................................................................................... 12

3 Terms, definitions, symbols, abbreviated terms and conventions................................... 13

3.1 Terms and definitions .......................................................................................... 13

3.1.1 Common terms and definitions ..................................................................... 14

3.1.2 CPF 8: Additional terms and definitions ........................................................ 20

3.2 Symbols and abbreviated terms ........................................................................... 21

3.2.1 Common symbols and abbreviated terms ...................................................... 21

3.2.2 CPF 8: Additional symbols and abbreviated terms ......................................... 22

3.3 Conventions ........................................................................................................ 22

4 Overview ..................................................................................................................... 22

5 General ....................................................................................................................... 22

6 Safety communication layer services ............................................................................ 23

7 Safety communication layer protocol ............................................................................ 23

8 Safety communication layer management ..................................................................... 23

9 System requirements ................................................................................................... 23

10 Assessment ................................................................................................................. 23

11 FSCP 8/1 .................................................................................................................... 23

11.1 Scope – FSCP 8/1 ............................................................................................... 23

11.2 Normative references – FSCP 8/1 ........................................................................ 23

11.3 Terms, definitions, symbols, abbreviated terms and conventions – FSCP 8/1 ........ 23

11.4 Overview of FSCP 8/1 (CC-Link Safety™) ........................................................... 23

11.5 General – FSCP 8/1 ............................................................................................ 24

11.5.1 External documents providing specifications for the profile ............................ 24

11.5.2 Safety functional requirements ..................................................................... 24

11.5.3 Safety measures .......................................................................................... 24

11.5.4 Safety communication layer structure ........................................................... 26

11.5.5 Relationships with FAL (and DLL, PhL) ......................................................... 26

11.6 Safety communication layer services for FSCP 8/1............................................... 27

11.6.1 General ....................................................................................................... 27

11.6.2 SASEs ......................................................................................................... 27

11.6.3 SARs ........................................................................................................... 28

11.6.4 Process data SAR ASEs .............................................................................. 28

11.7 Safety communication layer protocol for FSCP 8/1 ............................................... 29

11.7.1 Safety PDU format ....................................................................................... 29

11.7.2 State description .......................................................................................... 36

11.8 Safety communication layer management for FSCP 8/1 ....................................... 40

11.8.1 General ....................................................................................................... 40

11.8.2 Connection establishment and confirmation processing ................................. 41

11.8.3 Safety slave verification ............................................................................... 41

11.9 System requirements for FSCP 8/1 ...................................................................... 42

---------------------- Page: 4 ----------------------
IEC 61784-3-8:2016  IEC 2016 – 3 –

11.9.1 Indicators and switches ................................................................................ 42

11.9.2 Installation guidelines ................................................................................... 43

11.9.3 Safety function response time ...................................................................... 43

11.9.4 Duration of demands .................................................................................... 45

11.9.5 Constraints for calculation of system characteristics ..................................... 45

11.9.6 Maintenance ................................................................................................ 46

11.9.7 Safety manual .............................................................................................. 47

11.10 Assessment for FSCP 8/1 .................................................................................... 47

12 FSCP 8/2 .................................................................................................................... 47

12.1 Scope – FSCP 8/2 ............................................................................................... 47

12.2 Normative references – FSCP 8/2 ........................................................................ 47

12.3 Terms, definitions, symbols, abbreviated terms and conventions – FSCP 8/2 ........ 47

12.4 Overview of FSCP 8/2 (CC-Link IE™ Safety communication function) .................. 47

12.5 General – FSCP 8/2 ............................................................................................ 48

12.5.1 External documents providing specifications for the profile ............................ 48

12.5.2 Safety functional requirements ..................................................................... 48

12.5.3 Safety measures .......................................................................................... 49

12.5.4 Safety communication layer structure ........................................................... 53

12.5.5 Relationships with FAL (and DLL, PhL) ......................................................... 54

12.6 Safety communication layer services for FSCP 8/2............................................... 54

12.6.1 General ....................................................................................................... 54

12.6.2 Connection reestablishment services ............................................................ 54

12.6.3 Data transmission services ........................................................................... 55

12.6.4 Connection termination notification services ................................................. 56

12.7 Safety communication layer protocol for FSCP 8/2 ............................................... 56

12.7.1 Safety PDU format ....................................................................................... 56

12.7.2 Safety FAL service protocol machine (SFSPM) ............................................. 62

12.8 Safety communication layer management for FSCP 8/2 ....................................... 85

12.8.1 Parameter Definitions ................................................................................... 85

12.8.2 Parameter Setup .......................................................................................... 89

12.8.3 Management Services .................................................................................. 89

12.9 System requirements for FSCP 8/2 ...................................................................... 92

12.9.1 Indicators and switches ................................................................................ 92

12.9.2 Installation guidelines ................................................................................... 94

12.9.3 Safety function response time ...................................................................... 94

12.9.4 Duration of demands .................................................................................... 95

12.9.5 Constraints for calculation of system characteristics ..................................... 95

12.9.6 Maintenance ................................................................................................ 97

12.9.7 Safety manual .............................................................................................. 97

12.10 Assessment for FSCP 8/2 .................................................................................... 98

Annex A (informative) Additional information for functional safety communication

profiles of CPF 8 ................................................................................................................. 99

A.1 Hash function calculation for FSCP 8/1 ................................................................ 99

A.2 Hash function calculation for FSCP 8/2 ................................................................ 99

A.3 Meaning of response time calculation formula for FSCP 8/2 ................................. 99

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

communication profiles of CPF 8 ....................................................................................... 100

Bibliography ..................................................................................................................... 101

---------------------- Page: 5 ----------------------
– 4 – IEC 61784-3-8:2016  IEC 2016

Figure 1 – Relationships of IEC 61784-3 with other standards (machinery) ............................. 9

Figure 2 – Relationships of IEC 61784-3 with other standards (process) .............................. 10

Figure 3 – Relationship between SCL and the other layers of IEC 61158 Type 18 ................ 26

Figure 4 – State diagram ..................................................................................................... 37

Figure 5 – Detection of unintended repetition ...................................................................... 50

Figure 6 – Detection of incorrect sequence .......................................................................... 51

Figure 7 – Detection of loss ................................................................................................ 51

Figure 8 – Detection of unacceptable delay by time stamps ................................................. 52

Figure 9 – Detection of unacceptable delay by timer ............................................................ 53

Figure 10 – Protocol Hierarchy ............................................................................................ 54

Figure 11 – Safety PDU Structure ....................................................................................... 57

Figure 12 – CTRL Configuration .......................................................................................... 57

Figure 13 – SASE-M and SASE-S TS .................................................................................. 60

Figure 14 – S-Data during safety refresh ............................................................................. 60

Figure 15 – S-Data not during safety refresh ....................................................................... 61

Figure 16 – S-Data header configuration ............................................................................. 61

Figure 17 – CRC calculation ................................................................................................ 62

Figure 18 – Communication models ..................................................................................... 62

Figure 19 – SFSPM state transition diagram ........................................................................ 63

Figure 20 – Connection establishment sequence ................................................................. 65

Figure 21 – Communication sequence during safety refresh communication ......................... 65

Figure 22 – Offset measurement and generation sequence during safety refresh

communication ................................................................................................................... 66

Figure 23 – SFSPM-M state transition diagram .................................................................... 67

Figure 24 – Sequence other than during safety refresh ........................................................ 70

Figure 25 – S-Connect-req .................................................................................................. 71

Figure 26 – S-InitConfirmNetPrm-req .................................................................................. 71

Figure 27 – net_prm_list ..................................................................................................... 72

Figure 28 – S-InitVerifyStnPrm-req ...................................................................................... 72

Figure 29 – stn_prm_list ..................................................................................................... 72

Figure 30 – S-InvokeFunc-req ............................................................................................. 73

Figure 31 – S-WriteErrorInfo-req ......................................................................................... 73

Figure 32 – date_and_time_of_occurence ........................................................................... 74

Figure 33 – SFSPM-S state transition diagram .................................................................... 75

Figure 34 – Sequence other than during safety refresh ........................................................ 80

Figure 35 – S-Connect-rsp .................................................................................................. 80

Figure 36 – S-InitConfirmNetPrm-rsp ................................................................................... 81

Figure 37 – S-InitVerifyStnPrm-rsp ...................................................................................... 81

Figure 38 – S-InvokeFunc-rsp ............................................................................................. 82

Figure 39 – Offset calculation procedure of safety clock ...................................................... 83

Figure 40 – Relationship between transmission interval fluctuation and

transmission_interval .......................................................................................................... 86

Figure 41 – Calculation of allowable_refresh_interval .......................................................... 88

Figure 42 – Calculation of allowable_delay .......................................................................... 89

---------------------- Page: 6 ----------------------
IEC 61784-3-8:2016  IEC 2016 – 5 –

Figure 43 – Calculation of response time between safety PLCs ............................................ 94

Figure 44 – Relationship between safety connections and residual error rate ....................... 97

Figure A.1 – allowable_delay and offset calculation deviation .............................................. 99

Table 1 – Selection of the various measures for possible errors ........................................... 25

Table 2 – M1 safety device manager attribute format ........................................................... 30

Table 3 – S1 safety device manager attribute format ........................................................... 30

Table 4 – M1 safety connection manager attribute format .................................................... 30

Table 5 – S1 safety connection manager attribute format ..................................................... 30

Table 6 – M1 safety cyclic transmission attribute format ...................................................... 31

Table 7 – S1 safety cyclic transmission attribute format ....................................................... 31

Table 8 – M1 safety device manager attribute encoding ....................................................... 32

Table 9 – S1 safety device manager attribute encoding ....................................................... 32

Table 10 – M1 safety connection manager attribute encoding .............................................. 32

Table 11 – S1 safety connection manager attribute encoding ............................................... 33

Table 12 – M1 safety cyclic transmission attribute encoding................................................. 33

Table 13 – S1 safety cyclic transmission attribute encoding ................................................. 35

Table 14 – Safety master monitor timer operation ................................................................ 39

Table 15 – Safety slave monitor timer operation .................................................................. 39

Table 16 – Safety data monitor timer operation .................................................................... 39

Table 17 – Details of connection establishment and confirmation processing........................ 41

Table 18 – Details of slave information verification processing ............................................. 41

Table 19 – Details of safety slave parameter transmission processing .................................. 42

Table 20 – Monitor LEDs ..................................................................................................... 43

Table 21 – Safety function response time calculation ........................................................... 44

Table 22 – Safety function response time definition of terms ................................................ 44

Table 23 – Number of occupied slots and safety data .......................................................... 45

Table 24 – Residual error rate Λ (occupied slots = 1) ........................................................... 46

Table 25 – Residual error rate Λ (occupied slots = 2) ........................................................... 46

Table 26 – Selection of the various measures for possible errors ......................................... 49

Table 27 – SS-Start ............................................................................................................ 54

Table 28 – SS-Restart ........................................................................................................ 55

Table 29 – SS-InvokeFunc .................................................................................................. 55

Table 30 – SS-Read ........................................................................................................... 55

Table 31 – SS-Write ............................................................................................................ 56

Table 32 – SS-Terminate .................................................................................................... 56

Table 33 – Safety PDU elements ......................................................................................... 57

Table 34 – CTRL Elements ................................................................................................. 58

Table 35 – State list ............................................................................................................ 63

Table 36 – SFSPM-M timers ............................................................................................... 67

Table 37 – SFSPM-M state transition table .......................................................................... 67

Table 38 – support_functions .............................................................................................. 71

Table 39 – error_category ................................................................................................... 74

---------------------- Page: 7 ----------------------
– 6 – IEC 61784-3-8:2016  IEC 2016

Table 40 – error_category for AL errors ............................................................................... 74

Table 41 – error_code ......................................................................................................... 74

Table 42 – SFSPM-S timers ................................................................................................ 76

Table 43 – SFSPM-S state transition table .......................................................................... 76

Table 44 – Parameters used by safety communication layer ................................................ 85

Table 45 – SM-SetSafetyStationInfo .................................................................................... 89

Table 46 – Safety station information setting parameters of SM-SetSafetyStationInfo ........... 90

Table 47 – SM-SetSafetyNetworkParameter ........................................................................ 90

Table 48 – Safety network parameters of SM-SetSafetyNetworkParameter .......................... 90

Table 49 – SM-GetSafetyStationInfo ................................................................................... 91

Table 50 – Safety station information parameters of SM-GetSafetyStationInfo (Request) ...... 91

Table 51 – Safety station information parameters of SM-GetSafetyStationInfo

(Response) ......................................................................................................................... 91

Table 52 – SM-GetSafetyNetworkParameter ........................................................................ 92

Table 53 – Parameters of SM-GetSafetyNetworkParameter request ..................................... 92

Table 54 – Parameters
...

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