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.

Industrielle Kommunikationsnetze - Profile - Teil 3-3: Funktional sichere Übertragung bei Feldbussen - Zusätzliche Festlegungen für die Kommunikationsprofilfamilie 3

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).

Industrijska komunikacijska omrežja - Profili - 3-3. del: Funkciijska varnost procesnih vodil - Dodatne specifikacije za CPF 3

General Information

Status
Published
Publication Date
02-Sep-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jul-2021
Due Date
05-Sep-2021
Completion Date
03-Sep-2021

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SLOVENSKI STANDARD
SIST EN IEC 61784-3-3:2021
01-oktober-2021
Nadomešča:
SIST EN 61784-3-3:2018
Industrijska komunikacijska omrežja - Profili - 3-3. del: Funkciijska varnost
procesnih vodil - Dodatne specifikacije za CPF 3

Industrial communication networks - Profiles - Part 3-3: Functional safety fieldbuses -

Additional specifications for CPF 3

Industrielle Kommunikationsnetze - Profile - Teil 3-3: Funktional sichere Übertragung bei

Feldbussen - Zusätzliche Festlegungen für die Kommunikationsprofilfamilie 3

Réseaux de communication industriels - Profils - Partie 3-3: Bus de terrain de sécurité

fonctionnelle - Spécifications supplémentaires pour CPF 3
Ta slovenski standard je istoveten z: EN IEC 61784-3-3:2021
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.05 Večslojne uporabniške Multilayer applications
rešitve
SIST EN IEC 61784-3-3:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61784-3-3:2021
---------------------- Page: 2 ----------------------
SIST EN IEC 61784-3-3:2021
EUROPEAN STANDARD EN IEC 61784-3-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2021
ICS 25.040.40; 35.100.05 Supersedes EN 61784-3-3:2017 and all of its
amendments and corrigenda (if any)
English Version
Industrial communication networks - Profiles - Part 3-3:
Functional safety fieldbuses - Additional specifications for CPF 3
(IEC 61784-3-3:2021)

Réseaux de communication industriels - Profils - Partie 3-3: Industrielle Kommunikationsnetze - Profile - Teil 3-3:

Bus de terrain de sécurité fonctionnelle - Spécifications Funktional sichere Übertragung bei Feldbussen -

supplémentaires pour CPF 3 Zusätzliche Festlegungen für die
(IEC 61784-3-3:2021) Kommunikationsprofilfamilie 3
(IEC 61784-3-3:2021)

This European Standard was approved by CENELEC on 2021-06-09. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61784-3-3:2021 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61784-3-3:2021
EN IEC 61784-3-3:2021 (E)
European foreword

The text of document 65C/1083/FDIS, future edition 4 of IEC 61784-3-3, prepared by SC 65C

"Industrial networks" of IEC/TC 65 "Industrial-process measurement, control and automation" was

submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61784-3-3:2021.

The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2022-03-09

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2024-06-09

document have to be withdrawn

This document supersedes EN 61784-3-3:2017 and all of its amendments and corrigenda (if any).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 61784-3-3:2021 was approved by CENELEC as a

European Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60870-5-1 NOTE Harmonized as EN 60870-5-1
IEC 61000-1-2 NOTE Harmonized as EN 61000-1-2
IEC 61131-6 NOTE Harmonized as EN 61131-6
IEC 61158 (series) NOTE Harmonized as EN 61158 (series)
IEC 61496 (series) NOTE Harmonized as EN IEC 61496 (series)
IEC 61508-1:2010 NOTE Harmonized as EN 61508-1:2010 (not modified)
IEC 61508-4:2010 NOTE Harmonized as EN 61508-4:2010 (not modified)
IEC 61508-5:2010 NOTE Harmonized as EN 61508-5:2010 (not modified)
IEC 61508-6:2010 NOTE Harmonized as EN 61508-6:2010 (not modified)
IEC 61158-3-3 NOTE Harmonized as EN 61158-3-3
IEC 61158-4-3 NOTE Harmonized as EN IEC 61158-4-3
IEC 61158-5 (series) NOTE Harmonized as EN 61158-5 (series)
IEC 61784-3 (series) NOTE Harmonized as EN 61784-3 (series)
IEC 61784-5 (series) NOTE Harmonized as EN IEC 61784-5 (series)
IEC 61800-5-2 NOTE Harmonized as EN 61800-5-2
IEC 61804 (series) NOTE Harmonized as EN IEC 61804 (series)
ISO 10218-1 NOTE Harmonized as EN ISO 10218-1
ISO 13849 (series) NOTE Harmonized as EN ISO 13849 (series)
---------------------- Page: 4 ----------------------
SIST EN IEC 61784-3-3:2021
EN IEC 61784-3-3:2021 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the

relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available

here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60204-1 - Safety of machinery - Electrical equipment of EN 60204-1 -
machines - Part 1: General requirements
IEC 61000-6-7 - Electromagnetic compatibility (EMC) - Part 6-7: EN 61000-6-7 -
Generic standards - Immunity requirements for
equipment intended to perform functions in a
safety-related system (functional safety) in
industrial locations

IEC 61010-2-201 2017 Safety requirements for electrical equipment EN IEC 61010-2-201 2018

for measurement, control, and laboratory use -
Part 2-201: Particular requirements for control
equipment
IEC 61158-2 - Industrial communication networks - Fieldbus EN 61158-2 -
specifications - Part 2: Physical layer
specification and service definition
IEC 61158-5-3 - Industrial communication networks - Fieldbus EN 61158-5-3 -
specifications - Part 5-3: Application layer
service definition - Type 3 elements

IEC 61158-5-10 - Industrial communication networks - Fieldbus EN IEC 61158-5-10 -

specifications - Part 5-10: Application layer
service definition - Type 10 elements
IEC 61158-6-3 - Industrial communication networks - Fieldbus EN IEC 61158-6-3 -
specifications - Part 6-3: Application layer
protocol specification - Type 3 elements

IEC 61158-6-10 - Industrial communication networks - Fieldbus EN IEC 61158-6-10 -

specifications - Part 6-10: Application layer
protocol specification - Type 10 elements
IEC 61326-3-1 - Electrical equipment for measurement, control EN 61326-3-1 -
and laboratory use - EMC requirements - Part
3-1: Immunity requirements for safety-related
systems and for equipment intended to
perform safety-related functions (functional
safety) – General industrial applications
---------------------- Page: 5 ----------------------
SIST EN IEC 61784-3-3:2021
EN IEC 61784-3-3:2021 (E)
Publication Year Title EN/HD Year
IEC 61326-3-2 - Electrical equipment for measurement, control EN IEC 61326-3-2 -
and laboratory use - EMC requirements - Part
3-2: Immunity requirements for safety-related
systems and for equipment intended to
perform safety-related functions (functional
safety) - Industrial applications with specified
electromagnetic environment
IEC 61508 series Functional safety of EN 61508 series
electrical/electronic/programmable electronic
safety-related systems
IEC 61508-2 - Functional safety of EN 61508-2 -
electrical/electronic/programmable electronic
safety-related systems - Part 2: Requirements
for electrical/electronic/programmable
electronic safety-related systems (see
Functional Safety and IEC 61508
IEC 61511 series Functional safety - Safety instrumented EN 61511 series
systems for the process industry sector
IEC 61784-1 - Industrial communication networks - Profiles EN IEC 61784-1 -
Part 1: Fieldbus profiles
IEC 61784-2 - Industrial communication networks - Profiles - EN IEC 61784-2 -
Part 2: Additional fieldbus profiles for real-time
networks based on ISO/IEC/IEEE 8802-3

IEC 61784-3 2021 Industrial communication networks - Profiles - EN IEC 61784-3 2021

Part 3: Functional safety fieldbuses - General
rules and profile definitions

IEC 61784-5-3 - Industrial communication networks – Profiles – EN IEC 61784-5-3 -

Part 5-3: Installation of fieldbuses – Installation
profiles for CPF 3
IEC 61918 2018 Industrial communication networks - EN IEC 61918 2018
Installation of communication networks in
industrial premises
IEC 62061 - Safety of machinery - Functional safety of EN IEC 62061 -
safety-related control systems
IEC 62280 2014 Railway applications - Communication, - -
signalling and processing systems - Safety
related communication in transmission
systems

IEC 62443 series Security for industrial automation and control EN IEC 62443 series

systems

ISO 13849-1 2015 Safety of machinery - Safety-related parts of EN ISO 13849-1 2015

control systems - Part 1: General principles for
design

ISO 13849-2 2012 Safety of machinery - Safety-related parts of EN ISO 13849-2 2012

control systems - Part 2: Validation
---------------------- Page: 6 ----------------------
SIST EN IEC 61784-3-3:2021
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: 7 ----------------------
SIST EN IEC 61784-3-3:2021
– 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: 8 ----------------------
SIST EN IEC 61784-3-3:2021
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: 9 ----------------------
SIST EN IEC 61784-3-3:2021
– 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: 10 ----------------------
SIST EN IEC 61784-3-3:2021
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
...

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