IEC 61784-3-2:2007

Industrial communication networks - Profiles - Part 3-2: Functional safety fieldbuses - Additional specifications for CPF 2

IEC 61784 3-2:2007 specifies a safety communication layer (services and protocol) based on CPF 2 of IEC 61784-1, IEC 61784-2 and IEC 61158 Type 2. 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 series 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 communication industriels - Profils - Partie 3-2: Bus de terrain de sécurité fonctionnelle - Spécifications supplémentaires pour CPF 2

La CEI 61784-3-2:2007 spécifie une couche de communication relative à la sécurité (services et protocole) fondée sur la CPF 2 de la CEI 61784-1, la CEI 61784-2 et le Type 2 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 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 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: 29-Jun-2010

Relations

• Revised: IEC 61784-3-2:2010 - Industrial communication networks - Profiles - Part 3-2: Functional safety fieldbuses - Additional specifications for CPF 2
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61784-3-2
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Profiles –
Part 3-2: Functional safety fieldbuses – Additional specifications for CPF 2

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 61784-3-2
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Profiles –
Part 3-2: Functional safety fieldbuses – Additional specifications for CPF 2

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XH
ICS 35.100.05 25.040.40 ISBN 2-8318-9399-2

– 2 – 61784-3-2 © IEC:2007(E)
CONTENTS
FOREWORD.11

INTRODUCTION.13

1 Scope.17

2 Normative references .17

3 Terms, definitions, symbols, abbreviated terms and conventions .18

3.1 Terms and definitions .18

3.1.1 Common terms and definitions .18

3.1.2 CPF 2: Additional terms and definitions .22
3.2 Symbols and abbreviated terms.23
3.2.1 Common symbols and abbreviated terms .23
3.2.2 CPF 2: Additional symbols and abbreviated terms .23
3.3 Conventions .24
4 Overview of FSCP 2/1 (CIP Safety™).24
4.1 General .24
4.2 FSCP 2/1 .24
5 General .25
5.1 External documents providing specifications for the profile.25
5.2 Safety functional requirements .26
5.3 Safety measures .26
5.4 Safety communication layer structure .27
5.5 Relationships with FAL (and DLL, PhL) .27
5.5.1 General .27
5.5.2 Data types .27
6 Safety communication layer services .28
6.1 Introduction .28
6.2 Connection object .28
6.2.1 General .28
6.2.2 Class attribute extensions .28
6.2.3 Service extensions .29
6.2.4 Explicit message response format for SafetyOpen and SafetyClose .29
6.3 Connection Manager object .30
6.3.1 General .30

6.3.2 ForwardOpen for safety .30
6.3.3 Safety network segment .32
6.3.4 Originator rules for calculating the connection parameter CRC .34
6.3.5 SafetyOpen processing flowcharts.34
6.3.6 Checks required by Multipoint producers with existing connections .37
6.3.7 Electronic key usage for safety.37
6.3.8 RPI vs. API in safety connections .37
6.3.9 Application path construction for safety .37
6.3.10 Safety Validator connection types.39
6.3.11 Application reply data in a successful SafetyOpen response.40
6.3.12 Unsuccessful SafetyOpen response .41
6.3.13 ForwardClose for safety.44
6.4 Identity object.44
6.4.1 General .44

61784-3-2 © IEC:2007(E) – 3 –
6.4.2 Changes to common services .44

6.5 Link objects .45

6.5.1 DeviceNet object changes .45

6.5.2 TCP/IP Interface object changes .45

6.6 Safety Supervisor object.46

6.6.1 General .46

6.6.2 Safety Supervisor class attributes.46

6.6.3 Subclasses.47

6.6.4 Safety Supervisor instance attributes.47

6.6.5 Semantics .50

6.6.6 Subclasses.56
6.6.7 Safety Supervisor common services .56
6.6.8 Safety Supervisor behavior.67
6.7 Safety Validator object .74
6.7.1 General .74
6.7.2 Class attributes .74
6.7.3 Instance attributes .75
6.7.4 Class services .81
6.7.5 Instance services.81
6.7.6 Object behavior .82
6.8 Connection Configuration Object .85
6.8.1 General .85
6.8.2 Class attribute extensions .85
6.8.3 Instance attributes, additions and extensions. .85
6.8.4 Instance attribute semantics extensions or restrictions for safety.87
6.8.5 Special Safety Related Parameters – (Attribute 13) .92
6.8.6 Object-specific services.96
6.8.7 Common service extensions for safety.96
6.8.8 Object behavior .98
7 Safety communication layer protocol .99
7.1 Safety PDU format .99
7.1.1 Safety PDU encoding .99
7.1.2 Safety CRC .109
7.2 Communication protocol behavior.110
7.2.1 Sequence of safety checks .110

7.2.2 Connection termination. 110
7.2.3 Cross checking error .111
7.3 Time stamp operation.111
7.4 Protocol sequence diagrams .112
7.4.1 General .112
7.4.2 Normal safety transmission.112
7.4.3 Lost, corrupted and delayed message transmission. 113
7.4.4 Lost, corrupted or delayed message transmission with production
repeated.116
7.4.5 Point-to-point ping .118
7.4.6 Multipoint ping on CP 2/3 Safety.119
7.4.7 Multipoint ping on CP 2/2 safety networks .120
7.4.8 Multipoint ping – retry with success .121
7.4.9 Multipoint ping – retry with timeout .122

– 4 – 61784-3-2 © IEC:2007(E)
7.5 Safety protocol definition .123

7.5.1 General .123

7.5.2 High level view of a safety device .123

7.5.3 Safety Validator object .124

7.5.4 Relationship between SafetyValidatorServer and

SafetyValidatorClient .124

7.5.5 SafetyValidatorClient function definition . 125

7.5.6 SafetyValidatorServer function definition . 133

7.6 Safety message and protocol data specifications. 143

7.6.1 Mode octet .143

7.6.2 Time Stamp Section .144
...

IEC 61784-3-2 ®
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –
Part 3-2: Functional safety fieldbuses – Additional specifications for CPF 2

Réseaux de communication industriels – Profils –
Partie 3-2: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 2
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 61784-3-2 ®
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –

Part 3-2: Functional safety fieldbuses – Additional specifications for CPF 2

Réseaux de communication industriels – Profils –

Partie 3-2: Bus de terrain de sécurité fonctionnelle – Spécifications

supplémentaires pour CPF 2
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XH
ICS 25.040; 35.100.05 ISBN 978-2-8322-0888-5

– 2 – 61784-3-2 © IEC:2007
CONTENTS
FOREWORD . 11
INTRODUCTION . 13
1 Scope . 16
2 Normative references . 16
3 Terms, definitions, symbols, abbreviated terms and conventions . 17
3.1 Terms and definitions . 17
3.1.1 Common terms and definitions . 17
3.1.2 CPF 2: Additional terms and definitions . 21
3.2 Symbols and abbreviated terms. 22
3.2.1 Common symbols and abbreviated terms . 22
3.2.2 CPF 2: Additional symbols and abbreviated terms . 22
3.3 Conventions . 23
4 Overview of FSCP 2/1 (CIP Safety™) . 23
4.1 General . 23
4.2 FSCP 2/1 . 23
5 General . 24
5.1 External documents providing specifications for the profile . 24
5.2 Safety functional requirements . 25
5.3 Safety measures . 25
5.4 Safety communication layer structure . 26
5.5 Relationships with FAL (and DLL, PhL) . 26
5.5.1 General . 26
5.5.2 Data types . 26
6 Safety communication layer services . 27
6.1 Introduction . 27
6.2 Connection object . 27
6.2.1 General . 27
6.2.2 Class attribute extensions . 27
6.2.3 Service extensions . 28
6.2.4 Explicit message response format for SafetyOpen and SafetyClose . 28
6.3 Connection Manager object . 29
6.3.1 General . 29
6.3.2 ForwardOpen for safety . 29
6.3.3 Safety network segment . 31
6.3.4 Originator rules for calculating the connection parameter CRC . 33
6.3.5 SafetyOpen processing flowcharts . 33
6.3.6 Checks required by Multipoint producers with existing connections . 36
6.3.7 Electronic key usage for safety . 36
6.3.8 RPI vs. API in safety connections . 36
6.3.9 Application path construction for safety . 36
6.3.10 Safety Validator connection types . 38
6.3.11 Application reply data in a successful SafetyOpen response . 39
6.3.12 Unsuccessful SafetyOpen response . 40
6.3.13 ForwardClose for safety . 43
6.4 Identity object . 43
6.4.1 General . 43

61784-3-2 © IEC:2007 – 3 –
6.4.2 Changes to common services . 43
6.5 Link objects . 44
6.5.1 DeviceNet object changes . 44
6.5.2 TCP/IP Interface object changes . 44
6.6 Safety Supervisor object. 45
6.6.1 General . 45
6.6.2 Safety Supervisor class attributes . 45
6.6.3 Subclasses . 46
6.6.4 Safety Supervisor instance attributes . 46
6.6.5 Semantics . 49
6.6.6 Subclasses . 55
6.6.7 Safety Supervisor common services . 55
6.6.8 Safety Supervisor behavior . 66
6.7 Safety Validator object . 73
6.7.1 General . 73
6.7.2 Class attributes . 73
6.7.3 Instance attributes . 74
6.7.4 Class services . 80
6.7.5 Instance services . 80
6.7.6 Object behavior . 81
6.8 Connection Configuration Object . 84
6.8.1 General . 84
6.8.2 Class attribute extensions . 84
6.8.3 Instance attributes, additions and extensions. . 84
6.8.4 Instance attribute semantics extensions or restrictions for safety . 86
6.8.5 Special Safety Related Parameters – (Attribute 13) . 91
6.8.6 Object-specific services . 95
6.8.7 Common service extensions for safety . 95
6.8.8 Object behavior . 97
7 Safety communication layer protocol . 98
7.1 Safety PDU format . 98
7.1.1 Safety PDU encoding . 98
7.1.2 Safety CRC .
...