IEC 61784-2-4:2023

IEC 61784-2-4 ®
Edition 1.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial networks – Profiles –
Part 2-4: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 –
CPF 4
Réseaux industriels – Profils –
Partie 2-4: Profils de bus de terrain supplémentaires pour les réseaux en temps
réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 4

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IEC 61784-2-4 ®
Edition 1.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial networks – Profiles –

Part 2-4: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 –

CPF 4
Réseaux industriels – Profils –

Partie 2-4: Profils de bus de terrain supplémentaires pour les réseaux en temps

réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 4

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 35.100.20; 35.240.50 ISBN 978-2-8322-6693-9

– 2 – IEC 61784-2-4:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, abbreviated terms, acronyms, and conventions . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms and acronyms . 8
3.3 Symbols . 8
3.4 Conventions . 9
4 CPF 4 (P-NET) – RTE communication profiles . 9
4.1 General overview . 9
4.2 CP 4/3, P-NET on IP . 9
4.2.1 Physical layer . 9
4.2.2 Data-link layer . 9
4.2.3 Application layer . 10
4.2.4 Performance indicator selection . 11
Annex A (informative) CPF 4/3 (P-NET on IP) – Performance Indicator calculation . 16
A.1 Application scenario . 16
A.2 Delivery time calculation . 16
A.3 Non-RTE throughput calculation . 18
A.4 Non time-base synchronization accuracy . 19
A.5 RTE throughput calculation . 20
A.6 CPF 4/3, Derivation of delivery time formula . 20
A.7 CPF 4/3, Ethernet characteristics . 22
Bibliography . 23

Figure A.1 – Application configuration . 16
Figure A.2 – Non-RTE throughput calculation . 18
Figure A.3 – Non time-base synchronization accuracy . 19

Table 1 – CPF 4 symbols . 8
Table 2 – CP 4/3: DLL service selection. 10
Table 3 – CP 4/3: DLL protocol selection . 10
Table 4 – CP 4/3: AL service selection . 11
Table 5 – CP 4/3: AL protocol selection . 11
Table 6 – CP 4/3: PI overview . 11
Table 7 – CP 4/3: PI dependency matrix . 12
Table 8 – CP 4/3: Consistent set of PIs . 14
Table 9 – Parameters for calculation of consistent set of PIs . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL NETWORKS –
PROFILES –
Part 2-4: Additional real-time fieldbus profiles
based on ISO/IEC/IEEE 8802-3 –
CPF 4
FOREWORD
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rights. IEC shall not be held responsible for identifying any or all such patent rights.
Attention is drawn to the fact that the use of some of the associated protocol types is restricted
by their intellectual-property-right holders. In all cases, the commitment to limited release of
intellectual-property-rights made by the holders of those rights permits a layer protocol type to
be used with other layer protocols of the same type, or in other type combinations explicitly
authorized by their respective intellectual property right holders.
NOTE Combinations of protocol types are specified in the IEC 61784-1 series and the IEC 61784-2 series.
IEC 61784-2-4 has been prepared by subcommittee 65C: Industrial networks, of IEC technical
committee 65: Indust
...