IEC 61784-2-2:2023

Industrial networks - Profiles - Part 2-2: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 - CPF 2

IEC 61784-2-2:2023 defines extensions of Communication Profile Family 2 (CPF 2) for Real-Time Ethernet (RTE). CPF 2 specifies a set of Real-Time Ethernet (RTE) communication profiles (CPs) and related network components based on the IEC 61158 series (Type 2), ISO/IEC/IEEE 8802-3 and other standards.

Réseaux industriels - Profils - Partie 2-2: Profils de bus de terrain supplémentaires pour les réseaux en temps réel fondés sur l’ISO/IEC/IEEE 8802-3 - CPF 2

L' IEC 61784-2-2:2023 définit les extensions de la famille de profils de communication 2 (CPF 2) pour l’Ethernet en temps réel (RTE). La CPF 2 spécifie un jeu de profils de communication (CP) Ethernet en temps réel (RTE) et les composants de réseau connexes basés sur la série IEC 61158 (type 2), l’ISO/IEC/IEEE 8802-3 et d’autres normes.

General Information

• Status: Published
• Publication Date: 29-Mar-2023
• ICS: 35.100.20 - Data link layer
• ICS: 35.240.50 - IT applications in industry
• Technical Committee: SC 65C - Industrial networks
• Drafting Committee: WG 9 - TC 65/SC 65C/WG 9
• Current Stage: PPUB - Publication issued
• Start Date: 31-Mar-2023
• Completion Date: 30-Mar-2023

Relations

• Replaces: IEC 61784-2:2019 - Industrial communication networks - Profiles - Part 2: Additional fieldbus profiles for real-time networks based on ISO/IEC/IEEE 8802-3
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61784-2-2
®

Edition 1.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Industrial networks – Profiles –
Part 2-2: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 –
CPF 2

Réseaux industriels – Profils –
Partie 2-2: Profils de bus de terrain supplémentaires pour les réseaux en temps
réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 2

IEC 61784-2-2:2023-03(en-fr)

---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61784-2-2

®


Edition 1.0 2023-03




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Industrial networks – Profiles –

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

CPF 2



Réseaux industriels – Profils –

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


réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 2













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 35.100.20; 35.240.50 ISBN 978-2-8322-6691-5




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 61784-2-2:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, abbreviated terms, acronyms, and conventions . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms and acronyms . 9
3.3 Symbols . 9
3.4 Conventions . 10
4 CPF 2 (CIP™) – RTE communication profiles . 10
4.1 General overview . 10
4.2 CP 2/2 . 11
4.2.1 Physical layer . 11
4.2.2 Data-link layer . 11
4.2.3 Application layer . 11
4.2.4 Performance indicator selection . 11
4.3 CP 2/2.1 . 15
4.3.1 Physical layer . 15
4.3.2 Data-link layer . 15
4.3.3 Application layer . 17
4.3.4 Performance indicator selection . 23
Annex A (informative) CPF 2 (CIP) – Performance Indicator calculation . 25
A.1 Profile 2/2 EtherNet/IP . 25
A.1.1 Delivery time . 25
A.1.2 Throughput RTE . 25
A.2 Profile 2/2.1 EtherNet/IP with Time Synchronization. 26
A.2.1 Delivery time . 26
A.2.2 Maximum number of end-stations . 26
Bibliography . 27

Table 1 – CPF 2 symbols . 10
Table 2 – CP 2/2: PI overview . 11
Table 3 – CP 2/2: PI dependency matrix . 12
Table 4 – CP 2/2: Consistent set of PIs for factory automation . 15
Table 5 – CP 2/2.1: DLL protocol selection . 16
Table 6 – CP 2/2.1: DLL protocol selection of management objects . 17
Table 7 – CP 2/2.1: AL service selection . 18
Table 8 – CP 2/2.1: AL protocol selection . 19
Table 9 – ClockIdentity encoding for CP 2/2 . 20
Table 10 – CP 2/2 implementation profiles . 21
Table 11 – Features Supported for Type 2 Ethernet Transports implementation profile . 21

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IEC 61784-2-2:2023 © IEC 2023 – 3 –
Table 12 – Type 2 Ethernet transport profile supported Features . 22
Table 13 – Supported Encapsulation Commands for transport profiles . 22
Table 14 – CP 2/2.1: PI overview . 23
Table 15 – CP 2/2.1: PI dependency matrix . 24
Table 16 – CP 2/2.1: Consistent set of PIs for motion control . 24

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– 4 – IEC 61784-2-2:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

INDUSTRIAL NETWORKS –
PROFILES –

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

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
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 61784-2-2 has been prepared by subcommittee 65C: Industrial networks, of IEC technical
committee 65: Industrial-process measurement, control and automation. It is an International
Standard.
This first edition, together with the other parts of the same series, cancels and replaces the
fourth edition of IEC 61784-2 published in 2019. This first edition constitutes a technical revision.

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IEC 61784-2-2:2023 © IEC 2023 – 5 –
This edition includes the following significant technical changes with respect to
IEC 61784-2:2019:
a) split of the original IEC 61784-2 into several subparts, one subpart for the material of a
generic nature, and one subpart for each Communication Profile Family specified in the
original document;
b) addition of two DLL protocol management objects;
c) addition of profile information removed from the Type standards.
The text of this International Standard is based on the following documents:
Draft Report on voting
65C/1209/FDIS 65C/1237/RVD

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 61784-2 series, published under the general title
Industrial networks – Profiles – Part 2: Additional real-time fieldbus profiles based on
ISO/IEC/IEEE 8802-3, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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– 6 – IEC 61784-2-2:2023 © IEC 2023
INTRODUCTION
The IEC 61784-2 series provides additional Communication Profiles (CP) to the existing
Communication Profile Families (CPF) of the IEC 61784-1 series and additional CPFs with one
or more CPs. These profiles meet the industrial automation market objective of identifying Real-
Time Ethernet (RTE) communication networks coexisting with ISO/IEC/IEEE 8802-3 –
commonly known as Ethernet. These RTE communication networks use provisions of
ISO/IEC/IEEE 8802-3 for the lower communication stack layers and additionally provide more
predictable and reliable real-time data transfer and means for support of precise
synchronization of automation equipment.
More specifically, these profiles help to correctly state the compliance of RTE communication
networks with ISO/IEC/IEEE 8802-3, and to avoid the spreading of divergent implementations.
Adoption of Ethernet technology for industrial communication between controllers and even for
communication with field devices promotes the use of Internet technologies in the field area.
This availability would be unacceptable if it causes the loss of features required in the field area
for industrial communication automation networks, such as:
• real-time,
• synchronized actions between field devices like drives,
• efficient, frequent exchange of very small data records.
These new RTE profiles can take advantage of the improvements of Ethernet networks in terms
of transmission bandwidth and network span.
Another implicit but essential requirement is that the typical Ethernet communication
capabilities, as used in the office world, are fully retained, so that the software involved remains
applicable.
The market is in need of several network solutions, each with different performance
characteristics and functional capabilities, matching the diverse application requirements. RTE
performance indicators, whose values will be provided with RTE devices based on
communication profiles specified in the IEC 61784-2 series, enable the user to match network
devices with application-dependent performance requirements of an RTE network.

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IEC 61784-2-2:2023 © IEC 2023 – 7 –
INDUSTRIAL NETWORKS –
PROFILES –

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



1 Scope
This part of IEC 61784-2 defines extensions of Communication Profile Family 2 (CPF 2) for
Real-Time Ethernet (RTE). CPF 2 specifies a set of Real-Time Ethernet (RTE) communication
profiles (CPs) and related network components based on the IEC 61158 series (Type 2),
ISO/IEC/IEEE 8802-3 and other standards.
For each RTE communication profile, this document also specifies the relevant RTE
performance indicators and the dependencies between these RTE performance indicators.
NOTE 1 All CPs are based on standards or draft standards or International Standards published by the IEC or on
standards or International Standards established by other standards bodies or open standards processes.
NOTE 2 The RTE communication profiles use ISO/IEC/IEEE 8802-3 communication networks and its related
network components or IEC 61588 and in some cases amend those standards to obtain RTE features.
NOTE 3 Some CPs of CPF 2 are specified in IEC 61784-1-2.
2 Normative references
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 All parts of the IEC 61158 series, as well as the IEC 61784-1 series and the IEC 61784-2 series, are
maintained simultaneously. Cross-references to these documents within the text therefore refer to the editions as
dated in this list of normative references.
IEC 61158 (all parts), Industrial communication networks – Fieldbus specifications
IEC 61158-2:2023, Industrial communication networks – Fieldbus specifications – Part 2:
Physical layer specification and service definition
IEC 61158-3-2:2023, Industrial communication networks – Fieldbus specifications – Part 3-2:
Data-link layer service definition – Type 2 elements
IEC 61158-4-2:2023, Industrial communication networks – Fieldbus specifications – Part 4-2:
Data-link layer protocol specification – Type 2 elements
IEC 61158-5-2:2023, Industrial communication networks – Fieldbus specifications – Part 5-2:
Application layer service definition – Type 2 elements
IEC 61158-6-2:2023, Industrial communication networks – Fieldbus specifications – Part 6-2:
Application layer protocol specification – Type 2 elements
IEC 61588:2021, Precision clock synchronization protocol for networked measurement and
control systems

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– 8 – IEC 61784-2-2:2023 © IEC 2023
IEC 61784-1-2:2023, Industrial networks – Profiles – Part 1-2: Fieldbus profiles –
Communication Profile Family 2
IEC 61784-2-0:2023, Industrial networks – Profiles – Part 2-0: Additional real-time fieldbus
profiles based on ISO/IEC/IEEE 8802-3 – General concepts and terminology
IEC 61784-5-2, Industrial communication networks – Profiles – Part 5-2: Installation of
fieldbuses – Installation profiles for CPF 2
IEC 61918, Industrial communication networks – Installation of communication networks in
industrial premises
ISO/IEC/IEEE 8802-3, Telecommunications and exchange between information technology
systems – Requirements for local and metropolitan area networks – Part 3: Standard for
Ethernet
IEEE Std 802-2014, IEEE Standard for Local and Metropolitan Area Networks: Overview and
Architecture
IEEE Std 802.1AB-2016, IEEE Standard for Local and metropolitan area networks – Station and
Media Access Control Connectivity Discovery
IEEE Std 802.1AS-2020, IEEE Standard for Local and Metropolitan Area Networks – Timing
and Synchronization for Time-Sensitive Applications
IEEE Std 802.1Q-2018, IEEE Standard for Local and Metropolitan Area Networks – Bridges and
Bridged Networks
IETF RFC 768, J. Postel, User Datagram Protocol, August 1980, available at
https://www.rfc-editor.org/info/rfc768 [viewed 2022-02-18]
IETF RFC 791, J. Postel, Internet Protocol, September 1981, available at
https://www.rfc-editor.org/info/rfc791 [viewed 2022-02-18]
IETF RFC 792, J. Postel, Internet Control Message Protocol, September 1981, available at
https://www.rfc-editor.org/info/rfc792 [viewed 2022-02-18]
IETF RFC 793, J. Postel, Transmission Control Protocol, September 1981, available at
https://www.rfc-editor.org/info/rfc793 [viewed 2022-02-18]
IETF RFC 826, D. Plummer, An Ethernet Address Resolution Protocol: Or Converting Network
Protocol Addresses to 48.bit Ethernet Address for Transmission on Ethernet Hardware,
November 1982, available at https://www.rfc-editor.org/info/rfc826 [viewed 2022-02-18]
IETF RFC 894, C. Hornig, A Standard for the Transmission of IP Datagrams over Ethernet, April
https://www.rfc-editor.org/info/rfc894 [viewed 2022-02-18]
1984, available at
IETF RFC 1112, S.E. Deering, Host Extensions for IP Multicasting, August 1989, available at
https://www.rfc-editor.org/info/rfc1112 [viewed 2022-02-18]
IETF RFC 1122, R. Braden, Requirements for Internet Hosts – Communication Layers, October
1989, available at https://www.rfc-editor.org/info/rfc1122 [viewed 2022-02-18]
IETF RFC 1123, R. Braden, Requirements for Internet Hosts – Application and Support,
October 1989, available at https://www.rfc-editor.org/info/rfc1123 [viewed 2022-02-18]

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IEC 61784-2-2:2023 © IEC 2023 – 9 –
IETF RFC 1127, R.T. Braden, Perspective on the Host Requirements RFCs, October 1989,
available at https://www.rfc-editor.org/info/rfc1127 [viewed 2022-02-18]
IETF RFC 2236, W. Fenner, Internet Group Management Protocol, Version 2, November 1997,
available at https://www.rfc-editor.org/info/rfc2236 [viewed 2022-02-18]
IETF RFC 2544, S. Bradner, J. McQuaid, Benchmarking Methodology for Network Interconnect
Devices, March 1999, available at https://www.rfc-editor.org/info/rfc2544 [viewed 2022-02-18]
3 Terms, definitions, abbreviated terms, acronyms, and conventions
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61784-2-0,
ISO/IEC/IEEE 8802-3, IEEE Std 802-2014, IEEE Std 802.1AB-2016, IEEE Std 802.1AS-2020
and IEEE Std 802.1Q-2018 apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.2 Abbreviated terms and acronyms
For the purposes of this document, abbreviated terms and acronyms defined in IEC 61784-2-0
and the following apply.
CP Communication Profile [according to IEC 61784-1-0]
CPF Communication Profile Family [according to IEC 61784-1-0]
ICMP Internet Control Message Protocol (see IETF RFC 792)
IETF Internet Engineering Task Force
IP Internet Protocol (see IETF RFC 791)
LLDP Link Layer Discovery Protocol (see IEEE Std 802.1AB-2016)
PI Performance indicator
pps Packets per second
PTP Precision Time Protocol (see IEC 61588)
RSTP Rapid Spanning Tree Algorithm and Protocol (see IEEE Std 802.1Q-2018)
TCP Transmission Control Protocol (see IETF RFC 793)
UDP User Datagram Protocol (see IETF RFC 768)
3.3 Symbols
For the purposes of this document, symbols defined in IEC 61784-2-0 and Table 1 apply.
NOTE Definitions of symbols in this Subclause 3.3 do not use the italic font, as they are already identified as
symbols.

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– 10 – IEC 61784-2-2:2023 © IEC 2023
Table 1 – CPF 2 symbols
Symbol Definition Unit
APDUsize Size of the application protocol data unit per CP 2/2 connection octets
CD Cable segment delay µs
CL Cable segment length m
DT Delivery time µs
EN_NRTE_PR End-station non-RTE packet rate per CP 2/2 connection pps
EN_RTE_PR End-station RTE packet rate per CP 2/2 connection pps
EN_PR End-station packet rate pps
EN_PR_MAX End-station maximum packet rate pps
EN_TNRTE_PR End-station total non-RTE packet rate in pps pps
EN_TRTE_PR End-station total RTE packet rate pps
k Number of CP 2/2 connections supported by the end-station –
m Number of CR 2/2 non-RTE connections –
n Number of switches between sending and receiving end-stations –
p Number of CR 2/2 RTE connections –
NRTE_BW Non-RTE bandwidth %
PD Cable propagation delay n/m
SD Receiver stack delay µs
r
SD Sender stack delay µs
s
SL Switch latency µs
SPD Switch processing delay µs
T Packet transmit time µs
x_packet

3.4 Conventions
For the purposes of this document, the conventions defined in IEC 61784-2-0 apply.
1
4 CPF 2 (CIP™ ) – RTE communication profiles
4.1 General overview
Communication Profile Family 2 defines several communication profiles based on IEC 61158-2
(protocol type 2), IEC 61158-3-2, IEC 61158-4-2, IEC 61158-5-2, and IEC 61158-6-2, and on
other standards. These profiles all share for their upper layers the same communication system
commonly known as the Common Industrial Protocol (CIP).
___________
1
CIP™ is a trade name of ODVA, Inc. This information is given for the convenience of users of this document and
does not constitute an endorsement by IEC of the trademark holder or any of its products. Compliance with this
profile does not require use of the trade name CIP™. Use of the trade name CIP™ requires permission from
ODVA, Inc.

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IEC 61784-2-2:2023 © IEC 2023 – 11 –
This document defines two RTE communication profiles.
2
– Profile 2/2 EtherNet/IP™
This profile contains a s
...