IEC 61784-2-6:2023

Industrial networks - Profiles - Part 2-6: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 - CPF 6

IEC 61784-2-6:2023 defines extensions of Communication Profile Family 6 (CPF 6) for Real-Time Ethernet (RTE). CPF 6 specifies a set of Real-Time Ethernet (RTE) communication profiles (CPs) and related network components based on the IEC 61158 series (Type 8 and Type 10), ISO/IEC/IEEE 8802-3 and other standards.

Réseaux industriels – Profils – Partie 2-6: Profils de bus de terrain supplémentaires pour les réseaux en temps réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 6

L’IEC 61784-2-6:2023 définit les extensions de la famille de profils de communication 6 (CPF 6) pour l’Ethernet en temps réel (RTE). La CPF 6 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 8 et type 10), 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 61784-2-6
®

Edition 1.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Industrial networks – Profiles –
Part 2-6: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 –
CPF 6

Réseaux industriels – Profils –
Partie 2-6: Profils de bus de terrain supplémentaires pour les réseaux en temps
réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 6

IEC 61784-2-6:2023-03(en-fr)

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IEC 61784-2-6

®


Edition 1.0 2023-03




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside










Industrial networks – Profiles –

Part 2-6: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 –

CPF 6



Réseaux industriels – Profils –

Partie 2-6: Profils de bus de terrain supplémentaires pour les réseaux en temps


réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 6













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 35.100.20; 35.240.50 ISBN 978-2-8322-6694-6



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– 2 – IEC 61784-2-6:2023 © 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 . 8
4 CPF 6 (INTERBUS®) – RTE communication profiles . 9
4.1 General overview . 9
4.2 CP 6/4 . 10
4.2.1 Mapping . 10
4.2.2 Type 10 service and protocol selection . 11
4.2.3 Type 8 service and protocol selection . 12
4.2.4 Performance indicator selection . 12
4.3 CP 6/5 . 13
4.3.1 Mapping . 13
4.3.2 Type 10 service and protocol selection . 13
4.3.3 Type 8 service and protocol selection . 14
4.3.4 Performance indicator selection . 14
4.4 CP 6/6 . 14
4.4.1 Mapping . 14
4.4.2 Type 10 service and protocol selection . 14
4.4.3 Type 8 service and protocol selection . 15
4.4.4 Performance indicator selection . 15
Bibliography . 16

Figure 1 – Linking-device communication profiles RTE-network context . 9
Figure 2 – Linking-device mapping principle. 10
Figure 3 – Data Mapping . 11

Table 1 – CPF 6 symbols . 8
Table 2 – CPF 6: device CP identifier assignment . 10
Table 3 – Linking-device Type 10 network PI overview . 12

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IEC 61784-2-6:2023 © IEC 2023 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

INDUSTRIAL NETWORKS –
PROFILES –

Part 2-6: Additional real-time fieldbus profiles
based on ISO/IEC/IEEE 8802-3 –
CPF 6

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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
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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
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NOTE Combinations of protocol types are specified in the IEC 61784-1 series and the IEC 61784-2 series.
IEC 61784-2-6 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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– 4 – IEC 61784-2-6:2023 © IEC 2023
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.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

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IEC 61784-2-6:2023 © IEC 2023 – 5 –
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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– 6 – IEC 61784-2-6:2023 © IEC 2023
INDUSTRIAL NETWORKS –
PROFILES –

Part 2-6: Additional real-time fieldbus profiles
based on ISO/IEC/IEEE 8802-3 –
CPF 6



1 Scope
This part of IEC 61784-2 defines extensions of Communication Profile Family 6 (CPF 6) for
Real-Time Ethernet (RTE). CPF 6 specifies a set of Real-Time Ethernet (RTE) communication
profiles (CPs) and related network components based on the IEC 61158 series (Type 8 and
Type 10), 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 and in some cases amend those standards to obtain RTE features.
NOTE 3 Some CPs of CPF 6 are specified in IEC 61784-1-6.
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 61784-1-6:2023, Industrial networks – Profiles – Part 1-6: Fieldbus profiles –
Communication Profile Family 6
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 61784-2-3:2023, Industrial networks – Profiles – Part 2-3: Additional real-time fieldbus
profiles based on ISO/IEC/IEEE 8802-3 – CPF 3
IEC 61784-5-3, Industrial communication networks – Profiles – Part 5-3: Installation of
fieldbuses – Installation profiles for CPF 3
IEC 61784-5-6, Industrial communication networks – Profiles – Part 5-6: Installation of
fieldbuses – Installation profiles for CPF 6

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IEC 61784-2-6:2023 © IEC 2023 – 7 –
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 1157, J.D. Case, M. Fedor, M.L. Schoffstall, J. Davin, Simple Network Management
Protocol (SNMP), May 1990, available at
https://www.rfc-editor.org/info/rfc1157 [viewed 2022-02-18]
IETF RFC 1213, K. McCloghrie, M. Rose, Management Information Base for Network
Management of TCP/IP-based internets: MIB-II, March 1991, available at
https://www.rfc-editor.org/info/rfc1213 [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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– 8 – IEC 61784-2-6:2023 © IEC 2023
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)
MIB Management Information base
PI Performance indicator
RSTP Rapid Spanning Tree Algorithm and Protocol (see IEEE Std 802.1Q-2018)
SNMP Simple Network Management Protocol (see IETF RFC 1157)
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 always use the italic font, as they are already identified
as symbols.
Table 1 – CPF 6 symbols
Symbol Definition Unit
DTLD Total delivery time between a Type 8 slave and a Type 10 entity µs
DT10 Delivery time of the Type 10 network µs
Cta_M Application cycle time of the mapping application in the linking-device
M Type 8 Master implementation factor –
n Number of data octets (user data; payload) octets
sl8 Number of Type 8 slaves connected to the linking-device –
T Nominal bit duration (see IEC 61158-2, 27.2) µs
bit
t Software processing time of the Type 8 master (application specific) µs
S

3.4 Conventions
For the purposes of this document, the conventions defined in IEC 61784-2-0 apply.

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IEC 61784-2-6:2023 © IEC 2023 – 9 –
1
4 CPF 6 (INTERBUS® ) – RTE communication profiles
4.1 General overview
Communication Profile Family 6 (CPF 6) defines communication profiles based on IEC 61158
series Type 8 and Type 10 specifications, which correspond to parts of the communication
systems commonly known as INTERBUS and PROFINET.
In this document, the following communication profiles are specified for CPF 6:
– Profile 6/4
This profile defines service and protocol selections together with a mapping for a
linking-device connecting Type 8 and Type 10 communication systems. It comprises CP 6/1
master and CP 3/4 device together with a mapping.
– Profile 6/5
This profile defines service and protocol selections together with a mapping for a
linking-device connecting Type 8 and Type 10 communication systems. It comprises CP 6/1
master and CP 3/5 device together with a mapping.
– Profile 6/6
This profile defines service and protocol selections together with a mapping for a
linking-device connecting Type 8 and Type 10 communication systems. It comprises CP 6/1
master and CP 3/6 device together with a mapping.
Figure 1 shows the linking-device CPs and the relation to other Type 8 and Type 10 CPs.

Figure 1 – Linking-device communication profiles RTE-network context
Linking-devices which comply with a communication profile can be further classified by a
CP identifier. The CP identifier assignment is shown in Table 2.
___________
1 INTERBUS is the trade name of Phoenix Contact GmbH & Co. KG. 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 INTERBUS. Use of the trade name
INTERBUS requires permission of the trade name holder.

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– 10 – IEC 61784-2-6:2023 © IEC 2023
Table 2 – CPF 6: device CP identifier assignment
Profile Linking device
Profile 6/4 649
Profile 6/5 659
Profile 6/6 669

Each communication profile provides a well-defined set of provisions. For a distinct device,
further selections of services, parameters and parameter values shall be made. These
selections should be described according to ISO 15745-3 as INTERBUS device profiles in the
form of an INTERBUS device profile exchange description. An INTERBUS device profile based
on a CP shall specify the CP identifier in the following format:

4.2 CP 6/4
4.2.1 Mapping
Type 8 devices shall be assigned to Type 10 slots or Type 10 subslots.
NOTE 1 The mapping concept itself is not part of the communication profile. The mapping concept used could be
described in the device description of the linking-device according to ISO 15745-1.
Type 10 slots or subslots could have 1 or more Type 8 devices assigned to it.
Figure 2 depicts the mapping principle. The data mapping is shown in Figure 3.

Figure 2 – Linking-device mapping principle

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IEC 61784-2-6:2023 © IEC 2023 – 11 –

Figure 3 – Data Mapping
The specific applications realize the services of types 8 and 10 according to the defined
communication profiles. The data objects of the network applications are interconnected with a
mapping application which shall implement the following behavior:
• the Input/Output data of the subslot shall be mapped to the cyclic data of the corresponding
Type 8 slaves;
• the process data status information (IOPS/IOCS) of the subslot shall be locally generated
because there is no corresponding process data status in Type 8 Systems;
• the record data objects of the subslot shall be mapped to the non cyclic data of the
corresponding Type 8 slaves.
NOTE 2 It is possible to describe the Input/Output data and the record data of a subslot in the device description
of the linking-device according to ISO 15745-1.
4.2.2 Type 10 service and protocol selection
4.2.2.1 Physical layer
The Type 10 physical layer of this profile shall be according to ISO/IEC/IEEE 8802-3.
Linking-devices shall use a data rate of at least 100 Mbit/s and full-duplex mode at least for one
port. The auto negotiation and crossover function specified in ISO/IEC/IE
...