IEC 61784-2-11:2023

Industrial networks - Profiles - Part 2-11: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 - CPF 11

IEC 61784-2-11:2023 defines Communication Profile Family 11 (CPF 11). CPF 11 specifies a set of Real-Time Ethernet (RTE) communication profiles (CPs) and related network components based on the IEC 61158 series (Type 11), 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.

Réseaux industriels – Profils – Partie 2-11: Profils de bus de terrain supplémentaires pour les réseaux en temps réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 11

L’IEC 61784-2-11:2023 définit la famille de profils de communication 11 (CPF 11). La CPF 11 spécifie un ensemble de profils de communication (CP) Ethernet en temps réel (RTE, Real-Time Ethernet) et de composants de réseau associés basés sur la série IEC 61158 (type 11), l’ISO/IEC/IEEE 8802-3 et d’autres normes.
Pour chaque profil de communication RTE, le présent document spécifie également les indicateurs de performance RTE correspondants et les dépendances entre ces indicateurs de performance RTE.
NOTE 1 Tous les CP sont fondés sur des normes ou projets de normes, ou des Normes internationales, publiés par l’IEC, ou bien sur des normes ou des Normes internationales établies par d’autres organismes de normalisation ou des processus de normalisation ouverts.
NOTE 2 Les profils de communication RTE utilisent les réseaux de communication ISO/IEC/IEEE 8802-3 et leurs composants de réseau connexes, ou l’IEC 61588, et amendent dans certains cas ces normes, pour obtenir les fonctions RTE.

General Information

• Status: Published
• Publication Date: 04-May-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: 05-May-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 61784-2-11
®

Edition 1.0 2023-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Industrial networks – Profiles –
Part 2-11: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 –
CPF 11

Réseaux industriels – Profils –
Partie 2-11: Profils de bus de terrain supplémentaires pour les réseaux en temps
réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 11

IEC 61784-2-11:2023-05(en-fr)

---------------------- Page: 1 ----------------------
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IEC 61784-2-11

®


Edition 1.0 2023-05




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Industrial networks – Profiles –

Part 2-11: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 –

CPF 11



Réseaux industriels – Profils –

Partie 2-11: Profils de bus de terrain supplémentaires pour les réseaux en


temps réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 11













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 35.100.20; 35.240.50 ISBN 978-2-8322-6898-8




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

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– 2 – IEC 61784-2-11:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, abbreviated terms, acronyms, and conventions . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms and acronyms . 9
3.3 Symbols . 9
3.4 Conventions . 10
4 CPF 11 (TCnet) – RTE communication profiles . 10
4.1 General overview . 10
4.2 CP 11/1 . 11
4.2.1 Physical layer . 11
4.2.2 Data-link layer . 11
4.2.3 Application layer . 15
4.2.4 Performance indicator selection . 15
4.3 CP 11/2 . 22
4.3.1 Physical layer . 22
4.3.2 Data-link layer . 22
4.3.3 Application layer . 25
4.3.4 Performance indicator selection . 25
4.4 CP 11/3 . 31
4.4.1 Physical layer . 31
4.4.2 Data-link layer . 31
4.4.3 Application layer . 34
4.4.4 Performance indicator selection . 35
Bibliography . 42

Figure 1 – CP 11/1: Throughput RTE and non-RTE bandwidth . 19
Figure 2 – CP 11/2: Throughput RTE and non-RTE bandwidth . 28
Figure 3 – CP 11/3: Throughput RTE and non-RTE bandwidth . 38

Table 1 – CPF 11 symbols . 9
Table 2 – CPF 11: Overview of profile sets . 11
Table 3 – CP 11/1: DLL service selection . 11
Table 4 – CP 11/1: DLL protocol selection . 12
Table 5 – CP 11/1: DLL protocol selection of Clause 5 . 13
Table 6 – CP 11/1: DLL protocol selection of Clause 6 . 13
Table 7 – CP 11/1: AL service selection . 15
Table 8 – CP 11/1: AL protocol selection . 15
Table 9 – CP 11/1: PI overview . 16
Table 10 – CP 11/1: PI dependency matrix . 16
Table 11 – CP 11/1: TCC data service selection . 17
Table 12 – CP 11/1: Consistent set of PIs preferential for RTE communications . 21

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IEC 61784-2-11:2023 © IEC 2023 – 3 –
Table 13 – CP 11/1: Consistent set of PIs both for RTE and non-RTE communications . 21
Table 14 – CP 11/2: DLL protocol selection . 22
Table 15 – CP 11/2: DLL protocol selection of Clause 5 . 23
Table 16 – CP 11/2: DLL protocol selection of Clause 6 . 24
Table 17 – CP 11/2: PI overview . 26
Table 18 – CP 11/2: PI dependency matrix . 26
Table 19 – CP 11/2: TCC data service selection . 27
Table 20 – CP 11/2: Consistent set of PIs preferential for RTE communications . 30
Table 21 – CP 11/2: Consistent set of PIs both for RTE and non-RTE communications . 31
Table 22 – CP 11/3: DLL protocol selection . 31
Table 23 – CP 11/3: DLL protocol selection of Clause 5 . 32
Table 24 – CP 11/3: DLL protocol selection of Clause 6 . 33
Table 25 – CP 11/3: PI overview . 35
Table 26 – CP 11/3: PI dependency matrix . 36
Table 27 – CP 11/3: TCC data service selection . 37
Table 28 – CP 11/3: Consistent set of PIs preferential for RTE communications . 41
Table 29 – CP 11/3: Consistent set of PIs both for RTE and non-RTE communications . 41

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– 4 – IEC 61784-2-11:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

INDUSTRIAL NETWORKS –
PROFILES –

Part 2-11: Additional real-time fieldbus profiles
based on ISO/IEC/IEEE 8802-3 –
CPF 11

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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6) All users should ensure that they have the latest edition of this publication.
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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 61784-2-11 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 61784-2-11:2023 © 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.
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 61784-2-11:2023 © 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 61784-2-11:2023 © IEC 2023 – 7 –
INDUSTRIAL NETWORKS –
PROFILES –

Part 2-11: Additional real-time fieldbus profiles
based on ISO/IEC/IEEE 8802-3 –
CPF 11



1 Scope
This part of IEC 61784-2 defines Communication Profile Family 11 (CPF 11). CPF 11 specifies
a set of Real-Time Ethernet (RTE) communication profiles (CPs) and related network
components based on the IEC 61158 series (Type 11), 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.
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 61158-3-11:2007, Industrial communication networks – Fieldbus specifications – Part 3-11:
Data-link layer service definition – Type 11 elements
IEC 61158-4-11:2014, Industrial communication networks – Fieldbus specifications – Part 4-11:
Data-link layer protocol specification – Type 11 elements
IEC 61158-5-11:2007, Industrial communication networks – Fieldbus specifications – Part 5-11:
Application layer service definition – Type 11 elements
IEC 61158-6-11:2007, Industrial communication networks – Fieldbus specifications – Part 6-11:
Application layer protocol specification – Type 11 elements
IEC 61588, Precision clock synchronization protocol for networked measurement and control
systems
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

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– 8 – IEC 61784-2-11:2023 © IEC 2023
IEC 61784-5-11, Industrial communication networks – Profiles – Part 5-11: Installation of
fieldbuses – Installation profiles for CPF 11
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]
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

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IEC 61784-2-11:2023 © IEC 2023 – 9 –
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]
FCS Frame check sequence
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)
NoS Number of Switches
Phy PHY Physical layer entity sublayer (see ISO/IEC/IEEE 8802-3)
PI Performance indicator
PTP Precision Time Protocol (see IEC 61588)
RSTP Rapid Spanning Tree Algorithm and Protocol (see IEEE Std 802.1Q-2018)
TCC Time-Critical Cyclic
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.
Table 1 – CPF 11 symbols
Symbol Definition Unit
BW Bandwidth used both for the communication scheduling and the protocol overhead %
CNT
BW Bandwidth used for the non-RTE communications %
NRT
BW Bandwidth used for the RTE communications %
RTE
cd Cable delay µs
cdl Cable length total km
Ct Cycle time ms
data Complete Ethernet frame –
DT Delivery time of the high-speed cyclic data, which includes both the sender stack ms
H
traversal time (STTs) and the receiver stack traversal time (STTr) including Phy
and MAC
DT Delivery time of the low-speed cyclic data, which includes both the sender stack ms
L
traversal time (STTs) and the receiver stack traversal time (STTr) including Phy
and MAC
DT Delivery time of the medium-speed cyclic data, which includes both the sender ms
M
stack traversal time (STTs) and the receiver stack traversal time (STTr) including
Phy and MAC
DV Total volume of the high-speed cyclic data octets
HS
DV Total volume of the low-speed cyclic data octets
LS
DV Total volume of the medium-speed cyclic data octets
MS
NoS Number of switches –

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– 10 – IEC 61784-2-11:2023 © IEC 2023
Symbol Definition Unit
od Other delays µs
pd Propagation delay µs
STTs Sender stack traversal time including Phy and MAC µs
STTr Receiver stack traversal time including Phy and MAC µs
T The high-speed transmission time period – the basic cycle_time (ct) of the TCC ms
h
data service
T Total sum of the frame transmit time, in which the TCC data frame conveys the µs
HS
high-speed cyclic data
T The Low-speed transmission time period ms
l
T Total sum of the frame transmit time, in which the TCC data frame conveys the µs
LS
Low-speed Cyclic data
T The Medium-speed transmission time period ms
m
T Time for the maintenance and control, in which a new end-station is solicited to join µs
MAC
and the periodic time operation is controlled
T Total sum of the frame transmit time, in which the TCC data frame conveys the µs
MS
medium-speed cyclic data
T Total sum of the frame transmit time, in which the frame, with the non-RTE data as µs
NRT
a payload, is sent out of the end-station within the time period of T and is used for
h
the standard Ethernet application on sporadic
...