SIST EN IEC 61784-2-2:2023

SLOVENSKI STANDARD
01-november-2023
Industrijska omrežja - Profili - 2-2. del: Dodatni profili procesnih vodil v realnem
času po ISO/IEC/IEEE 8802-3 - CPF 2 (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)
Industrielle Kommunikationsnetze - Profile - Teil 2-2: Zusätzliche Feldbusprofile für
Echtzeitnetzwerke basierend auf ISO/IEC/IEEE 8802-3 - Kommunikationsprofilfamilie
(CPF) 2 (IEC 61784-2-2:2023)
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)
Ta slovenski standard je istoveten z: EN IEC 61784-2-2:2023
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.05 Večslojne uporabniške Multilayer applications
rešitve
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61784-2-2

NORME EUROPÉENNE
EUROPÄISCHE NORM May 2023
ICS 35.100.20; 35.240.50 Supersedes EN IEC 61784-2:2019 (partially)
English Version
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)
Réseaux industriels - Profils - Partie 2-2: Profils de bus de Industrielle Kommunikationsnetze - Profile - Teil 2-2:
terrain supplémentaires pour les réseaux en temps réel Zusätzliche Feldbusprofile für Echtzeitnetzwerke basierend
fondés sur l'ISO/IEC/IEEE 8802-3 - CPF 2 auf ISO/IEC/IEEE 8802-3 - Kommunikationsprofilfamilie
(IEC 61784-2-2:2023) (CPF) 2
(IEC 61784-2-2:2023)
This European Standard was approved by CENELEC on 2023-05-04. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61784-2-2:2023 E

European foreword
The text of document 65C/1209/FDIS, future edition 1 of IEC 61784-2-2, prepared by SC 65C
"Industrial networks" of IEC/TC 65 "Industrial-process measurement, control and automation" was
submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61784-2-2:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-02-04
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-05-04
document have to be withdrawn
This document, together with other parts of the same series, partially supersedes EN IEC 61784-
2:2019 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61784-2-2:2023 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 61158-1 NOTE Approved as EN IEC 61158-1
IEC 61784-1 (series) NOTE Approved as EN IEC 61784-1 (series)
IEC 61784-1-0 NOTE Approved as EN IEC 61784-1
IEC 61784-2 (series) NOTE Approved as EN IEC 61784-2 (series)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 61158 series Industrial communication networks - EN IEC 61158 series
Fieldbus specifications
IEC 61158-2 2023 Industrial communication networks - EN IEC 61158-2 2023
Fieldbus specifications - Part 2: Physical
layer specification and service definition
IEC 61158-3-2 2023 Industrial communication networks - EN IEC 61158-3-2 2023
Fieldbus specifications - Part 3-2: Data-link
layer service definition - Type 2 elements
IEC 61158-4-2 2023 Industrial communication networks - EN IEC 61158-4-2 2023
Fieldbus specifications - Part 4-2: Data-link
layer protocol specification - Type 2
elements
IEC 61158-5-2 2023 Industrial communication networks - EN IEC 61158-5-2 2023
Fieldbus specifications - Part 5-2:
Application layer service definition - Type 2
elements
IEC 61158-6-2 2023 Industrial communication networks - EN IEC 61158-6-2 2023
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
IEC 61784-1-2 2023 Industrial networks - Profiles - Part 1-2: EN IEC 61784-1-2 2023
Fieldbus profiles - Communication Profile
Family 2
IEC 61784-2-0 2023 Industrial networks - Profiles - Part 2-0: EN IEC 61784-2-0 2023
Additional real-time fieldbus profiles based
on ISO/IEC/IEEE 8802-3 - General
concepts and terminology
IEC 61784-5-2 - Industrial communication networks - EN IEC 61784-5-2 -
Profiles - Part 5-2: Installation of fieldbuses
- Installation profiles for CPF 2
IEC 61918 - Industrial communication networks - EN IEC 61918 -
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 - Media Access Control
(MAC) Bridges and Bridged Networks
IETF RFC 768 1980 User Datagram Protocol - -
IETF RFC 791 1981 Internet Protocol - -
IETF RFC 792 1981 Internet Control Message Protocol - -
IETF RFC 793 1981 Transmission Control Protocol - -
IETF RFC 826 1982 Ethernet Address Resolution Protocol: Or - -
Converting Network Protocol Addresses to
48.bit Ethernet Address for Transmission
on Ethernet Hardware
IETF RFC 894 1984 Standard for the Transmission of IP - -
Datagrams over Ethernet Networks
IETF RFC 1112 1989 Host Extensions for IP Multicasting - -
IETF RFC 1122 1989 Requirements for Internet Hosts - - -
Communication Layers
IETF RFC 1123 1989 Requirements for Internet Hosts - - -
Application and Support
IETF RFC 1127 1989 A Perspective on the Host Requirements - -
RFCs
IETF RFC 2236 1997 Internet Group Management Protocol, - -
Version 2
IETF RFC 2544 - Benchmarking Methodology for Network - -
Interconnect Devices
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
– 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

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

– 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
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 61784-2-2 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.

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.
– 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.

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
– 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]

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.
– 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.
4 CPF 2 (CIP™ ) – RTE communication profiles
4.1 General overview
Communication Profile Family 2 defines several
...