IEC 61784-2-11:2023

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

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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC - Découvrez notre puissant moteur de recherche et consultez
webstore.iec.ch/advsearchform gratuitement tous les aperçus des publications. Avec un
La recherche avancée permet de trouver des publications IEC abonnement, vous aurez toujours accès à un contenu à jour
en utilisant différents critères (numéro de référence, texte, adapté à vos besoins.
comité d’études, …). Elle donne aussi des informations sur les
projets et les publications remplacées ou retirées. Electropedia - www.electropedia.org

Le premier dictionnaire d'électrotechnologie en ligne au monde,
IEC Just Published - webstore.iec.ch/justpublished
avec plus de 22 300 articles terminologiques en anglais et en
Restez informé sur les nouvelles publications IEC. Just
français, ainsi que les termes équivalents dans 19 langues
Published détaille les nouvelles publications parues.
additionnelles. Egalement appelé Vocabulaire
Disponible en ligne et une fois par mois par email.
Electrotechnique International (IEV) en ligne.

Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
IEC Products & Services Portal - products.iec.ch

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

– 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

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

– 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
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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.

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.
– 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.

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

– 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

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 –
– 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 basis
TR Throughput RTE of the high-speed cyclic data Moctets/s
HS
TR Throughput RTE of the low-speed cyclic data Moctets/s
LS
TR Throughput RTE of the medium-speed cyclic data Moctets/s
MS
TR Throughput RTE, and the sum of TR , TR and TR Moctets/s
RTE HS LS MS
T Total sum of the frame transmit time, in which the frame, with the RTE data as a µs
RTE
payload of a fixed length, is sent out of the end-station within the time period of T
h
T Total sum of the frame transmit time for the transmission scheduling µs
SCH
tt Transfer time µs
3.4 Conventions
For the purposes of this document, the conventions defined in IEC 61784-2-0 apply.
4 CPF 11 (TCnet ) – RTE communication profiles
4.1 General overview
Communication Profile Family 11 defines three types of communication profile based on
IEC 61158-3-11, IEC 61158-4-11, IEC 61158-5-11 and IEC 61158-6-11 which corresponds to
the communication systems commonly known as TCnet.
– Profile 11/1 (TCnet-star)
This profile constitutes a TCnet communication system with star topology. It contains a
selection of AL, and DLL services and protocol definitions from IEC 61158-3-11,
IEC 61158-4-11, IEC 61158-5-11 and IEC 61158-6-11.
___________
1 In Japan, TCnet is a trade name of TOSHIBA Corporation. 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. Use of the trade name requires permission
of the trade name holder.
– Profile 11/2 (TCnet-loop 100 with physical layer of 100 Mbit/s)
This profile constitutes a TCnet communication system with loop (ring) topology. It contains
a selection of AL, and DLL services and protocol definitions from IEC 61158-3-11,
IEC 61158-4-11, IEC 61158-5-11 and IEC 61158-6-11.
– Profile 11/3 (TCnet-loop 1G with physical layer of 1 000 Mbit/s)
This profile constitutes a TCnet communication system with loop (ring) topology. It contains
a selection of AL, and DLL services and protocol definitions from IEC 61158-3-11,
IEC 61158-4-11, IEC 61158-5-11 and IEC 61158-6-11.
Table 2 shows the overview of TCnet profile set.
Table 2 – CPF 11: Overview of profile sets
Layer Profile 11/1, profile 11/2, profile 11/3
Application IEC 61158-5-11, IEC 61158-6-1
Data-link IEC 61158-3-11, IEC 61158-4-11
Physical ISO/IEC/IEEE 8802-3
4.2 CP 11/1
4.2.1 Physical layer
The physical layer of 100 Mbit/s shall be according to ISO/IEC/IEEE 8802-3.
Connectors and cables are specified in IEC 61784-5-11 and IEC 61918.
4.2.2 Data-link layer
4.2.2.1 DLL services selection
Table 3 specifies the DLL service selection within IEC 61158-3-11.
Table 3 – CP 11/1: DLL service selection
Clause Header Presence Constraints
1 Scope YES –
2 Normative references YES Relevant reference only
3 Terms, definitions, symbols, abbreviations and Partial –
conventions
4 Data Link services and concept YES –
4.1 Overview YES –
4.2 General description of services YES –
4.3 TCC data service YES –
4.4 Detail description of sporadic message data service YES –
5 DL-management services YES –
5.1 General YES –
5.2 Facilities of the DL-Management service YES –
5.3 Service of the DL-management YES –
5.4 Overview of interactions YES –
5.5 Detail specification of service and interactions YES –

– 12 – IEC 61784-2-11:2023 © IEC 2023
4.2.2.2 DLL protocol selection
Table 4 specifies the DLL protocol selection within IEC 61158-4-11.
Table 4 – CP 11/1: DLL protocol selection
Clause Header Presence Constraints
1 Scope YES –
2 Normative references YES Relevant reference only
3 Terms, definitions, symbols and abbreviations Partial –
4 Overview of the DL-protocol – –
4.1 General YES –
4.2 Overview of the medium access control YES –
4.3 Service assumed from the PhL YES –
4.4 DLL architecture – –
4.4.1 Overview YES –
4.4.2 Star-architecture YES –
4.4.3 Loop-architecture NO –
4.5 Access control machine and schedule support functions YES –
4.6 Local parameters, variables, counters, timers and – –
queues
4.6.1 Overview YES –
4.6.1.1 General
4.6.1.2 Summary of variables, parameters, counters, timers for YES –
star-architecture
4.6.1.3 Summary of variables, parameters, counters, timers for NO –
loop-architecture
4.6.2 Type 11 common variables, parameters, counters, YES Relevant values and features
timers and queues to star-architecture
4.6.3 Star-architecture specific variables, parameters counters YES –
timers and queues
4.6.4 Loop-architecture specific variables, parameters, NO –
counters timers and queues
5 General structure and encoding of PhlDEs and DLPDU YES See Table 5
and related elements of procedure
6 DLPDU-specific structure, encoding and elements of YES See Table 6
procedure
7 DLE elements of procedure – –
7.1 DLE elements of procedure for star-architecture YES –
7.2 DLE elements of procedure for loop-architecture NO –
7.3 Serializer and deserializer YES –
7.4 DLL management protocol – –
7.4.1 DLL management protocol for star-architecture YES –
7.4.2 DLL management protocol for loop-architecture NO –

Table 5 – CP 11/1: DLL protocol selection of Clause 5
Clause Header Presence Constraints
5.1 Overview YES –
5.2 PhlDU structure and encoding YES –
5.3 Common MAC frame structure, encoding and elements YES –
of procedure
5.4 Elements of the MAC frame – –
5.4.1 General YES –
5.4.2 Preamble field YES –
5.4.3 Start frame delimiter (SFD) YES –
5.4.4 Address field YES –
5.4.5 Length/type field YES –
5.4.6 Frame control field (FC) – –
5.4.6.1 Structure of FC field YES –
5.4.6.2 Frame type (F-type) field YES –
5.4.6.3 Priority field (Pri) YES Relevant features to star-
architecture
5.4.7 Source node number field (SN) YES –
5.4.8 Data and pad field YES –
5.4.9 Frame check sequence (FCS) YES –
5.5 Order of bit transmission YES –
5.6 Invalid DLPDU YES –
Table 6 – CP 11/1: DLL protocol selection of Clause 6
Clause Header Presence Constraints
–
6.1 General YES
6.2 Synchronization DLPDU (SYN) – –
–
6.2.1 General YES
–
6.2.2 Structure of SYN DLPDU YES
–
6.2.3 Parameters of SYN DLPDU –
Relevant features to star-
6.2.3.1 Transmission permits node number (PN) YES
architecture
–
6.2.3.2 Control word (CW) –
–
6.2.3.2.1 CW for star-architecture YES
–
6.2.3.2.2 CW for loop-architecture NO
Relevant features to star-
6.2.3.3 Slot time (ST) YES
architecture
–
6.2.3.4 High-speed transmission period (T ) YES
h
–
6.2.3.5 Medium-speed transmission period (T ) YES
m
Relevant features to star-
6.2.3.6 Sporadic message transmission target-token-rotation- YES
architecture
time period (T )
S
–
6.2.3.7 Low-speed transmission period (T ) YES
l
6.2.3.8 Live list (LL) YES –
–
6.2.4 User data YES
–
6.2.5 Sending SYN DLPDU YES
– 14 – IEC 61784-2-11:2023 © IEC 2023
Clause Header Presence Constraints
–
6.2.6 Receiving SYN DLPDU YES
–
6.3 Transmission complete DLPDU (CMP) YES
–
6.4 In-ring request DLPDU (REQ) –
–
6.4.1 General YES
–
6.4.2 Structure of REQ DLPDU YES
–
6.4.3 Node-mode – ESYN parameter NO
–
6.4.4 Recipient node number (RN) Parameter NO
–
6.4.5 User data of REQ DLPDU YES
–
6.4.6 Sending REQ DLPDU YES
–
6.4.7 Receiving REQ DLPDU YES
–
6.5 Claim DLPDU (CLM) –
–
6.5.1 General YES
–
6.5.2 Structure of CLM DLPDU YES
6.5.3 Parameter of CLM DLPDU – –
–
6.5.3.1 Residual counts of CLM DLPDU parameter (RC) YES
Relevant feature to star-
6.5.3.2 Slot time (ST) parameter YES
architecture
–
6.5.3.3 Node mode (NM) parameter NO
6.5.4 User data of CLM DLPDU YES –
–
6.5.5 Sending and receiving CLM DLPDU YES
–
6.6 Command DLPDU (COM) YES
–
6.6.1 General YES
–
6.6.2 Structure of COM DLPDU YES
–
6.6.3 Parameter of COM DLPDU YES
–
6.6.4 User data of COM DLPDU YES
Relevant feature to star-
6.6.5 Sending and receiving COM DLPDU YES
architecture
–
6.7 Cyclic data and cyclic data with transmission complete –
DLPDU (DT) and (DT-CMP)
–
6.7.1 General YES
–
6.7.2 Structure of the DT DLPDU YES
–
6.7.3 Parameters of DT DLPDU –
–
6.7.3.1 DLCEP-address parameter YES
–
6.7.3.2 Word length parameter (WD) –
–
6.7.3.2.1 WD for star-architecture YES
–
6.7.3.2.2 WD for loop-architecture NO
–
6.7.4 Sending DT or DT-CMP DLPDU YES
–
6.7.5 Receiving DT or DT-CMP DLPDU YES
6.8 RAS DLPDU (RAS) – –
–
6.8.1 General YES
–
6.8.2 Structure of RAS DLPDU YES
–
6.8.3 DCEP-address parameters YES
–
6.8.4 User data YES
6.8.5 Sending and receiving RAS DLPDU YES Relevant feature to star-
architecture
–
6.9 Loop repeat request DLPDU (LRR) NO

Clause Header Presence Constraints
–
6.10 Loop diagnosis DLPDU (LPD) NO

4.2.3 Application layer
4.2.3.1 AL service selection
Table 7 specifies the AL service selection within IEC 61158-5-11.
In addition, AL services are mapped onto the TCP/UDP/IP protocol suite, as defined in
IETF RFC 793, IETF RFC 768 and IETF RFC 791 respectively.
Table 7 – CP 11/1: AL service selection
Clause Header Presence Constraints
1 Scope YES –
2 Normative references YES Relevant reference only
3 Terms and definitions, abbreviations and conventions Partial Used when applicable
4 Concepts YES –
5 Data type ASE  Partial Used when applicable
6 Communication model specification YES –

4.2.3.2 AL protocol selection
Table 8 specifies the AL protocol selection within IEC 61158-6-11.
Table 8 – CP 11/1: AL protocol selection
Clause Header Presence Constraints
1 Scope YES –
2 Normative references Partial Relevant reference only
3 Terms, definitions, symbols, abbreviations and Partial Used when applicable
conventions
4 FAL Syntax description YES –
5 Transfer syntax YES –
6 FAL protocol state machine structures YES –
7 FAL Service Protocol Machine (FSPM) YES –
8 Application Relationship Protocol Machines (ARPM) YES –
9 DLL Mapping Protocol Machines (DMPM) YES –

4.2.4 Performance indicator selection
4.2.4.1 Performance indicator overview
Table 9 shows the performance indicators overview of CP 11/1.

– 16 – IEC 61784-2-11:2023 © IEC 2023
Table 9 – CP 11/1: PI overview
Performance indicator Applicable Constraints
Delivery time YES –
Number of end-stations YES –
Basic network topology YES Star topology
Number of switches between end-stations NO Hubs fit, and switches should not be
applicable for highest performance
Throughput RTE YES –
Non-RTE bandwidth YES –
Time synchronization accuracy YES IEC 61588 shall be installed
Non-time-based synchronization accuracy YES –
Redundancy recovery time YES Null time switching without interruption

4.2.4.2 Performance indicator dependencies
4.2.4.2.1 Dependency matrix
Table 10 shows the dependencies between performance indicators for CP 11/1.
Table 10 – CP 11/1: PI dependency matrix
Influencing PI
Dependent PI
NO NO NO
NO NO
Delivery time 4.2.4.2.2 4.2.4.2.2 4.2.4.2.2 NO NO
4.2.4.2.5 4.2.4.2.6
4.2.4.2.4 4.2.4.2.3 4.2.4.2.3
YES YES
Number of end-
NO NO 4.2.4.2.2 4.2.4.2.2 NO NO NO
stations
4.2.4.2.3 4.2.4.2.3
Basic network
NO NO NO NO NO NO NO
topology
YES YES YES
Throughput RTE 4.2.4.2.2 4.2.4.2.2 NO 4.2.4.2.2 NO NO NO
4.2.4.2.3 4.2.4.2.3 4.2.4.2.3
YES YES YES
Non-RTE bandwidth 4.2.4.2.2 4.2.4.2.2 NO 4.2.4.2.2 NO NO NO
4.2.4.2.3 4.2.4.2.3 4.2.4.2.3
Time synchronization
NO NO NO NO NO NO NO
accuracy
Non-time-based
synchronization NO NO NO NO NO NO NO
accuracy
Redundancy recovery
NO NO NO NO NO NO NO
time
Delivery time
Number of
end-stations
Basic network
topology
Throughput RTE
Non-RTE
bandwidth
Time
synchronization
accuracy
Non time- based
synchronization
accuracy
Redundancy
recovery time
4.2.4.2.2 Calculation of Delivery time
Delivery time is definitely specified by the application users using the TCC data service, and
the delivery time specified meets both cases of no transmission error and one lost frame with
recovery.
The TCC data service provides 3 kinds of the data transmission service at the same time, that
are according to the data preference and the delivery time of an APDU to be transferred using
the data transmission service.
Table 11 specifies the TCC data service selection supported by this profile.
Table 11 – CP 11/1: TCC data service selection
Service ref. Service name Applicable Constraint
IEC 61158-3-11 High-speed cyclic data YES The range of the high-speed
Clause 4 transmission transmission period (T ) is 1 ms to
h
160 ms, of which unit is in 0,1 ms
IEC 61158-3-11 Medium-speed cyclic data The range of the medium-speed
YES
Clause 4 transmission transmission period (T ) is 10 ms to
m
1 000 ms, of which unit is in 1 ms
and in multiples of the T
h
IEC 61158-3-11 Low-speed cyclic data YES The range of low-speed transmission
Clause 4 transmission period (T ) is 100 ms to 10 000 ms,
l
of which unit is in 1 ms and in
multiples of the T
h
The performance indicator delivery time is related to the amount of both RTE data and non-RTE
data which are exchanged between the end-stations, the number of the Ethernet frame that is
used for the deterministic transmission scheduling, the signal propagation delay to the end-
station, the number of the end-stations and the number of the Hubs between the end-stations.
The performance indicator delivery time can be calculated using the Formulae (1), (2), (3), (4)
and (5).
DT =T
(1)
H h
DT =T
(2)
Mm
DT =T
(3)
Ll
TT +T +T ++T T
(4)
h RTE NRT SCH PD MAC
TT
MS LS
TT+ ×T+ ×T
(5)
RTE HS h h
TT
ml
=
=
– 18 – IEC 61784-2-11:2023 © IEC 2023
where
DT is the delivery time for the high-speed cyclic data, which includes both the sender stack
H
traversal time (STTs) and the receiver stack traversal time (STTr) including Phy and MAC;
DT is the delivery time for the medium-speed cyclic data, which includes both the sender
M
stack traversal time (STTs) and the receiver stack traversal time (STTr) including Phy and
MAC;
DT is the delivery time for the low-speed cyclic data, which includes both the sender stack
L
traversal time (STTs) and the receiver stack traversal time (STTr) including Phy and MAC;
T is the high-speed transmission time period, and is the basic cycle_time (ct) for the TCC
h
data service;
T is the medium-speed transmission time period;
m
T is the low-speed transmission time p
...