IEC 61784-3-6:2007

Industrial communication networks - Profiles - Part 3-6: Functional safety fieldbuses - Additional specifications for CPF 6

IEC 61784-3-6:2007 specifies a safety communication layer (services and protocol) based on CPF 6 of IEC 61784-1, IEC 61784-2 and IEC 61158 Type 8. It identifies the principles for functional safety communications defined in IEC 61784-3 that are relevant for this safety communication layer. It 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 for functional safety. These mechanisms may be used in various industrial applications such as process control, manufacturing automation and machinery. This bilingual version (2013-07) corresponds to the monolingual English version, published in 2007-12.

Réseaux de communications industriels - Profils - Partie 3-6: Bus de terrain de sécurité fonctionnelle - Spécifications supplémentaires pour la CPF 6

La CEI 61784-3-6:2007 spécifie une couche de communication relative à la sécurité (services et protocole) fondée sur la CPF 6 de la CEI 61784-1, la CEI 61784-2 et le Type 8 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. Elle définit les mécanismes de transmission des messages propres à la sécurité entre les participants d'un réseau réparti, en utilisant la technologie de bus de terrain conformément aux exigences de la CEI 61508 concernant la sécurité fonctionnelle. Ces mécanismes peuvent être utilisés dans diverses applications industrielles, telles que la commande de processus, l'usinage automatique et les machines. La présente version bilingue (2013-07) correspond à la version anglaise monolingue publiée en 2007-12.

General Information

• Status: Published
• Publication Date: 13-Dec-2007
• 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: DELPUB - Deleted Publication
• Completion Date: 10-Jul-2013

Relations

• Revised: IEC 61784-3-6:2010 - Industrial communication networks - Profiles - Part 3-6: Functional safety fieldbuses - Additional specifications for CPF 6
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61784-3-6
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Profiles –
Part 3-6: Functional safety fieldbuses – Additional specifications for CPF 6

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
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IEC 61784-3-6
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Profiles –
Part 3-6: Functional safety fieldbuses – Additional specifications for CPF 6

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XC
ICS 35.100.05 25.040.40 ISBN 2-8318-9401-8

– 2 – 61784-3-6 © IEC:2007(E)
CONTENTS
FOREWORD.7

INTRODUCTION.9

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 .13

3.1.2 CPF 6: Additional terms and definitions .17
3.2 Symbols and abbreviated terms.18
3.2.1 Common symbols and abbreviated terms .18
3.2.2 CPF 6: Additional symbols and abbreviated terms .18
3.3 Conventions .19
4 Overview of FSCP 6/7 (INTERBUS™ Safety) .19
4.1 General .19
4.2 Technical overview.19
4.3 Functional Safety Communication Profile 6/7.20
5 General .21
5.1 External documents providing specifications for the profile.21
5.2 Safety functional requirements .21
5.3 Safety measures .21
5.3.1 General .21
5.3.2 Sequence number .22
5.3.3 Time stamp .22
5.3.4 Time expectation .22
5.3.5 Acknowledgement .22
5.3.6 Connection authentication .22
5.3.7 Distinction between safety relevant messages and non-safety
relevant messages – different data integrity assurance system.23
5.3.8 Parameterized shutdown time.23
5.4 Safety communication layer structure .23
5.4.1 Decomposition process.23
5.4.2 Definition of the safety function of the safety communication system .24
5.4.3 Decomposition of the safety function of a safety communication

system into function blocks.25
5.4.4 Assignment of the function blocks to subsystems .26
5.4.5 Safety requirements and safety integrity requirements.29
5.4.6 Specification of the safe state.29
5.4.7 Response to a fault .30
5.4.8 Stop category .32
5.4.9 Safe Transmission.32
5.5 Relationships with FAL (and DLL, PhL) .33
5.5.1 Overview .33
5.5.2 Use of the AR-US service to initiate and parameterize.33
5.5.3 Use of the AR-US service to transmit safety data .34
5.5.4 Use of the AR-US service to abort .35
5.5.5 Data types .35
6 Safety communication layer services .35

61784-3-6 © IEC:2007(E) – 3 –
6.1 General .35

6.2 Transmission principle for safety messages between SCLM and SCLS .35

6.3 Function block requirements.36

6.3.1 Input Safe Data function block .36

6.3.2 Output Safe Data function block .36

6.3.3 Safe Calculation function block.36

6.4 Context management .37

6.4.1 Initiate service .37

6.4.2 Abort service .38

6.5 Function block parameterization .39

6.5.1 Send application parameter service .39
6.5.2 Send application parameter ID service .40
6.5.3 Parameterize device service.41
6.6 Safe Process Data Mode.41
6.6.1 Transmit-Safety-Data .41
6.6.2 Set-Diagnostic-Data service .43
6.6.3 Set-Acknowledgement-Data service .43
7 Safety communication layer protocol .44
7.1 Safety PDU format .44
7.1.1 Structure of safety messages .44
7.1.2 Description of the polynomial used .45
7.1.3 Structure of safety messages for safe parameterization and idle .45
7.1.4 Structure of safety messages for the transmission of safety data.51
7.1.5 Messages for synchronization.52
7.1.6 Structure of safety messages for aborting connections .53
7.2 State description .54
7.2.1 SCLM and SCLS state machines .54
7.2.2 Initiate .55
7.2.3 Parameterization .56
7.2.4 Process data mode.59
7.2.5 Process data mode with diagnostic data transmission .64
7.2.6 Process data mode with Acknowledgement-Data transmission .65
7.2.7 Connection aborted .66
7.3 Abort .66
7.3.1 Connection abort in the event of an error detected by the SCLM .66

7.3.2 Abort of all connections in the event of an error detected by the
SCLS.67
7.3.3 Abort of all connections in the event of an error detected by the
SCLM .69
8 Safety communication layer management.70
8.1 General .70
8.2 Requirements of safety communication layer management.70
8.3 Set-Safety-Configuration service .70
8.4 Start IEC 61158 Type 8 service .72
9 System requirements.72
9.1 Indicators and switches .72
9.2 Installation guidelines.72
9.3 Safety function response time .72
9.3.1 General .72

– 4 – 61784-3-6 © IEC:2007(E)
9.3.2 Calculation of the parameterized shutdown time .73

9.4 Duration of demands .77

9.5 Constraints for calculation of system characteristics.77

9.5.1 System characteristics.77

9.5.2 Calculation of the number of telegrams per second .77

9.6 Maintenance.78

9.7 Safety manual .79

10 Certification.79

Bibliography.80

Table 1 – Overview of profile identifier usable for FSCP 6/7.21
Table 2 – Selection of the various measures for possible err
...

IEC 61784-3-6 ®
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –
Part 3-6: Functional safety fieldbuses – Additional specifications for CPF 6

Réseaux de communications industriels – Profils –
Partie 3-6: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour la CPF 6
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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International Standards for all electrical, electronic and related technologies.

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latest edition, a corrigenda or an amendment might have been published.

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IEC 61784-3-6 ®
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –

Part 3-6: Functional safety fieldbuses – Additional specifications for CPF 6

Réseaux de communications industriels – Profils –

Partie 3-6: Bus de terrain de sécurité fonctionnelle – Spécifications

supplémentaires pour la CPF 6
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XC
ICS 25.040; 35.100.05 ISBN 978-2-8322-0845-8

– 2 – 61784-3-6 © IEC:2007
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
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 . 13
3.1.2 CPF 6: Additional terms and definitions . 17
3.2 Symbols and abbreviated terms. 18
3.2.1 Common symbols and abbreviated terms . 18
3.2.2 CPF 6: Additional symbols and abbreviated terms . 18
3.3 Conventions . 19
4 Overview of FSCP 6/7 (INTERBUS™ Safety) . 19
4.1 General . 19
4.2 Technical overview . 19
4.3 Functional Safety Communication Profile 6/7 . 20
5 General . 21
5.1 External documents providing specifications for the profile . 21
5.2 Safety functional requirements . 21
5.3 Safety measures . 21
5.3.1 General . 21
5.3.2 Sequence number . 22
5.3.3 Time stamp . 22
5.3.4 Time expectation . 22
5.3.5 Acknowledgement . 22
5.3.6 Connection authentication . 22
5.3.7 Distinction between safety relevant messages and non-safety
relevant messages – different data integrity assurance system . 23
5.3.8 Parameterized shutdown time . 23
5.4 Safety communication layer structure . 23
5.4.1 Decomposition process. 23
5.4.2 Definition of the safety function of the safety communication system . 24
5.4.3 Decomposition of the safety function of a safety communication
system into function blocks . 25
5.4.4 Assignment of the function blocks to subsystems . 26
5.4.5 Safety requirements and safety integrity requirements . 29
5.4.6 Specification of the safe state . 29
5.4.7 Response to a fault . 30
5.4.8 Stop category . 32
5.4.9 Safe Transmission . 32
5.5 Relationships with FAL (and DLL, PhL) . 33
5.5.1 Overview . 33
5.5.2 Use of the AR-US service to initiate and parameterize . 33
5.5.3 Use of the AR-US service to transmit safety data . 34
5.5.4 Use of the AR-US service to abort . 35
5.5.5 Data types . 35

61784-3-6 © IEC:2007 – 3 –
6 Safety communication layer services . 35
6.1 General . 35
6.2 Transmission principle for safety messages between SCLM and SCLS . 35
6.3 Function block requirements . 36
6.3.1 Input Safe Data function block . 36
6.3.2 Output Safe Data function block . 36
6.3.3 Safe Calculation function block . 36
6.4 Context management . 37
6.4.1 Initiate service . 37
6.4.2 Abort service . 38
6.5 Function block parameterization . 39
6.5.1 Send application parameter service . 39
6.5.2 Send application parameter ID service . 40
6.5.3 Parameterize device service . 41
6.6 Safe Process Data Mode . 41
6.6.1 Transmit-Safety-Data . 41
6.6.2 Set-Diagnostic-Data service . 43
6.6.3 Set-Acknowledgement-Data service . 43
7 Safety communication layer protocol . 44
7.1 Safety PDU format . 44
7.1.1 Structure of safety messages . 44
7.1.2 Description of the polynomial used . 45
7.1.3 Structure of safety messages for safe parameterization and idle . 45
7.1.4 Structure of safety messages for the transmission of safety data . 51
7.1.5 Messages for synchronization . 52
7.1.6 Structure of safety messages for aborting connections . 53
7.2 State description . 54
7.2.1 SCLM and SCLS state machines . 54
7.2.2 Initiate . 55
7.2.3 Parameterization . 56
7.2.4 Process data mode . 59
7.2.5 Process data mode with diagnostic data transmission . 64
7.2.6 Process data mode with Acknowledgement-Data transmission . 65
7.2.7 Connection aborted . 66
7.3 Abort . 66
7.3.1 Connectio
...