IEC 61784-2-3:2023

IEC 61784-2-3 ®
Edition 1.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial networks – Profiles –
Part 2-3: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 –
CPF 3
Réseaux industriels – Profils –
Partie 2-3: Profils de bus de terrain supplémentaires pour les réseaux en temps
réel fondés sur l’ISO/IEC/IEEE 8802-3 – CPF 3

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IEC 61784-2-3 ®
Edition 1.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial networks – Profiles –

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

CPF 3
Réseaux industriels – Profils –

Partie 2-3: Profils de bus de terrain supplémentaires pour les réseaux en temps

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

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 35.100.20; 35.240.50 ISBN 978-2-8322-6692-2

– 2 – IEC 61784-2-3:2023 © IEC 2023
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms, definitions, abbreviated terms, acronyms, symbols and conventions . 13
3.1 Terms and definitions . 13
3.2 Abbreviated terms and acronyms . 13
3.3 Symbols . 15
3.4 Conventions . 16
4 CPF 3 (PROFIBUS & PROFINET) – RTE communication profiles . 16
4.1 General . 16
4.2 Common . 20
4.2.1 Administrative numbers . 20
4.2.2 Node Classes . 21
4.2.3 Application classes . 25
4.2.4 Communication classes . 31
4.2.5 Void . 36
4.2.6 Protocol and timing parameters . 36
4.2.7 Media redundancy classes . 50
4.2.8 Media classes . 52
4.2.9 Records . 52
4.2.10 Communication feature list . 62
4.3 Conformance class behaviors . 63
4.3.1 General . 63
4.3.2 IO controller, IO device, IO supervisor and Network Management Entity . 64
4.3.3 End station component . 65
4.3.4 Bridge component . 74
4.3.5 Network components . 80
4.3.6 Interconnect . 81
4.4 Profile 3/4 . 82
4.4.1 Physical layer . 82
4.4.2 Data link layer . 82
4.4.3 Application layer . 83
4.4.4 Performance indicator selection . 92
4.5 Profile 3/5 . 99
4.5.1 Physical layer . 99
4.5.2 Data link layer . 99
4.5.3 Application layer . 100
4.5.4 Performance indicator selection . 108
4.6 Profile 3/6 . 110
4.6.1 Physical layer . 110
4.6.2 Data link layer . 110
4.6.3 Application layer . 110
4.6.4 Performance indicator selection . 118
4.7 Profile 3/7 . 122
4.7.1 Physical layer . 122
4.7.2 Data link layer . 122

4.7.3 Application layer . 122
4.7.4 Performance indicator selection . 130
4.8 Additional information . 133
Annex A (informative) CPF 3 (PROFINET) – Performance Indicator calculation . 134
A.1 Application Scenario . 134
A.2 Structural examples used for calculation . 134
A.2.1 CP 3/4 . 134
A.2.2 CP 3/5 . 136
A.2.3 CP 3/6 . 137
A.2.4 CP 3/7 . 143
A.3 Principles used for calculation . 143
A.3.1 General . 143
A.3.2 Stack traversal time . 143
A.3.3 Bridge structure . 143
Bibliography . 146

Figure 1 – Conformance class model . 17
Figure 2 – End station and bridge systems. 17
Figure 3 – Bridge as network component . 18
Figure 4 – End station with wireless . 18
Figure 5 – Network component with wireless . 19
Figure 6 – Hierarchical conformance class model . 19
Figure 7 – Hierarchical conformance class model – with integrated bridge component . 20
Figure 8 – Hierarchical conformance class model – network component . 20
Figure 9 – Example of network topology using CP 3/4, CP 3/5, and CP 3/6 components . 81
Figure 10 – Example of network topology using CP 3/4, CP 3/5, CP 3/6 and CP 3/7
components . 82
Figure 11 – Example of network topology with wireless segment. 85
Figure 12 – Calculation basis for delivery time and throughput RTE . 95
Figure A.1 – CP 3/4: Example of line structure . 134
Figure A.2 – CP 3/4: Example of ring structure . 135
Figure A.3 – CP 3/4: Example of a wireless segment . 135
Figure A.4 – CP 3/4: Example of an integrated wireless client . 136
Figure A.5 – CP 3/5: Example of line structure . 136
Figure A.6 – CP 3/5: Example of ring structure . 137
Figure A.7 – CP 3/6: Example of line structure . 138
Figure A.8 – CP 3/6: Example of line structure . 139
Figure A.9 – CP 3/6: Example of ring structure . 140
Figure A.10 – CP 3/6: Example of tree structure . 141
Figure A.11 – CP 3/6: Example of comb structure . 142
Figure A.12 – CP 3/6: Example of comb structure (optional) . 143
Figure A.13 – Definition of bridge delay . 144

Table 1 – CPF 3 symbols . 15
Table 2 – Administrative numbers assignment . 21

– 4 – IEC 61784-2-3:2023 © IEC 2023
Table 3 – Node Classes and assigned Traffic Classes . 22
Table 4 – Maximum diagnosis data for one submodule . 22
Table 5 – Maximum storage delay . 23
Table 6 – Reporting system minimum storage size . 23
Table 7 – Reporting system storage . 23
Table 8 – Reporting system Timeouts . 24
Table 9 – Maximum storage delay . 25
Table 10 – NME requirements . 25
Table 11 – Application classes applicable in conformance classes for IO device and IO
controller . 26
Table 12 – Application classes applicable in conformance classes for network

components . 26
Table 13 – Application class "isochronous application" AL service selection . 26
Table 14 – Application class "isochronous application" AL protocol selection
component . 27
Table 15 – Application class "high availability" AL service selection . 27
Table 16 – Application class "high availability" AL protocol selection component . 27
Table 17 – Basis application class for "process automation" . 28
Table 18 – Application class "process automation" AL service selection . 28
Table 19 – Application class "process automation" AL protocol selection component . 28
Table 20 – Application class "High performance" features supported . 29
Table 21 – Application class "High performance" parameter values . 29
Table 22 – Application class "Controller to Controller" features supported . 29
Table 23 – Application class "Functional safety" features supported by IO device . 30
Table 24 – Application class "Functional safety" features supported by IO controller. 30
Table 25 – Application class "Energy saving" AL service selection . 31
Table 26 – Application class "Energy saving" features supported by IO device . 31
Table 27 – Application class "Energy saving" features supported by IO controller . 31
Table 28 – Communication classes applicable in conformance classes . 32
Table 29 – Communication performance parameters . 32
Table 30 – FrameSendOffset deviation for RT_CLASS_1 / RT_CLASS_UDP . 33
Table 31 – FrameSendOffset deviation for RT_CLASS_1 / RT_CLASS_UDP
certification . 33
Table 32 – FrameSendOffset deviation factors – SendListControl . 34
Table 33 – FrameSendOffset deviation factors – PHY . 34
Table 34 – FrameSendOffset deviation . 34
Table 35 – Minimum FrameSendOffset . 35
Table 36 – FrameSendOffset deviation . 35
Table 37 – Parameters for RT_CLASS_3 bridges . 35
Table 38 – PTCP control loop . 36
Table 39 – IEEE Std 802.1AS-2020 control loop . 36
Table 40 – Maximum frame size. 36
Table 41 – IP layer parameters for IO controller . 37
Table 42 – IP layer parameters for IO device . 37

Table 43 – Timeout values for name resolution . 37
Table 44 – Values for hello request deviation . 37
Table 45 – DCP Identify responder resources . 38
Table 46 – DCP access control . 38
Table 47 – DCP Identify pruning support . 38
Table 48 – Maximum time values for MRP for 10 Mbit/s and for ≥ 100 Mbit/s . 38
Table 49 – Maximum packet size for MRP . 39
Table 50 – Maximum time values for PTCP . 39
Table 51 – Precision of timers used for PTCP . 39
Table 52 – Maximum time values . 40
Table 53 – Maximum deviation values for Global Time . 40
Table 54 – Maximum deviation values for Working Clock . 40
Table 55 – Maximum time values for LLDP . 41
Table 56 – Required RPC resources . 42
Table 57 – Required RPCActivityUUID resources . 42
Table 58 – Number of ImplicitARs . 42
Table 59 – RTA Timeout deviation . 42
Table 60 – Required receive resources . 43
Table 61 – Number of LogBookData entries . 43
Table 62 – Recommended out of the box default . 43
Table 63 – CIMSNMPAdjust . 43
Table 64 – Community name, default values . 44
Table 65 – SNMP timeout values . 44
Table 66 – MIB objects update time values . 44
Table 67 – DHCP client. 44
Table 68 – High Availability times . 45
Table 69 – Address parameter . 45
Table 70 – AR Parameters . 46
Table 71 – PDEV parameters . 47
Table 72 – Reaction time for an IO device . 48
Table 73 – Data Hold Time deviation . 49
Table 74 – Expected PHY delay . 50
Table 75 – Expected Bridge delay . 50
Table 76 – Media redundancy class applicable in conformance classes . 51
Table 77 – Media redundancy – additional forwarding rules . 51
Table 78 – Media redundancy startup mode . 52
Table 79 – Version controlled "Read Record" . 52
Table 80 – Index (user specific) . 53
Table 81 – Index (subslot specific) . 53
Table 82 – Index (slot specific) . 56
Table 83 – Index (AR specific) . 57
Table 84 – Index (API specific) . 58
Table 85 – Index (device specific) . 59

– 6 – IEC 61784-2-3:2023 © IEC 2023
Table 86 – PDPortDataAdjust (sub blocks) . 61
Table 87 – PDPortDataCheck (sub blocks) . 62
Table 88 – Communication feature list . 62
Table 89 – IO controller, IO device, IO supervisor and Network Management Entity. 63
Table 90 – Network Component . 64
Table 91 – Conformance class behaviors . 64
Table 92 – Node classes . 65
Table 93 – Link speed dependent local injection per Ethernet interface . 65
Table 94 – SNMP feature selection . 66
Table 95 – IETF RFC 1213-MIB (MIB-2) objects . 67
Table 96 – LLDP-MIB objects – range 1 . 67
Table 97 – LLDP-MIB objects – range 2 . 68
Table 98 – LLDP-MIB objects – range 3 . 68
Table 99 – LLDP-EXT-PNO-MIB objects – range 1 . 69
Table 100 – LLDP-EXT-PNO-MIB objects – range 2. 69
Table 101 – LLDP-EXT-DOT3-MIB objects – range 1 . 69
Table 102 – LLDP-EXT-DOT3-MIB objects – range 2 . 69
Table 103 – IEEE 802.1Q-BRIDGE-MIB objects . 70
Table 104 – NETCONF feature selection . 70
Table 105 – IEEE Std 802.3-2018 feature selection . 71
Table 106 – IEEE Std 802.1Q-2018 feature selection . 71
Table 107 – Node classes for bridge . 74
Table 108 – Supported concurrent Link Speed for bridges . 74
Table 109 – IEEE Std 802.1Q-2018 bridge components for Conformance Class D . 74
Table 110 – IEC 61784-5-3 feature selection . 75
Table 111 – IEC 62439-2 feature selection . 75
Table 112 – Buffering capacity per port . 76
Table 113 – Special case: Buffering capacity for eight and more ports . 76
Table 114 – IEEE Std 802.1AB-2016 feature selection . 77
Table 115 – IEEE Std 802.1AS-2020 feature selection . 77
Table 116 – IEEE Std 802.1CB-2017 feature selection . 78
Table 117 – IEEE Std 802.1Q-2018 feature selection . 79
Table 118 – Cut through feature selection . 80
Table 119 – Wireless feature selection . 80
Table 120 – Node classes for network component . 80
Table 121 – Conformance class constraints – wireline . 81
Table 122 – Conformance class constraints – wireless . 81
Table 123 – CP 3/4: AL service selection for an IO device . 83
Table 124 – CP 3/4: Additional AL service selection for an IO controller . 86
Table 125 – CP 3/4: Additional AL service selection for an IO supervisor . 86
Table 126 – CP 3/4: AL protocol selection for an IO device . 87
Table 127 – CP 3/4: AL protocol selection for an IO controller . 89
Table 128 – CP 3/4, CP 3/5, CP 3/6 and CP 3/7: performance indicator overview . 92

Table 129 – CP 3/4, CP 3/5, CP 3/6 and CP 3/7: performance indicator dependency
matrix . 93
Table 130 – Media Redundancy Manager (MRM) parameters . 96
Table 131 – Media Redundancy Client (MRC) parameters . 97
Table 132 – Media redundancy Interconnection Manager (MIM) parameters . 97
Table 133 – Media redundancy Interconnection Client (MIC) parameters . 97
Table 134 – CP 3/4: Consistent set of PI for MinDeviceInterval=128 ms . 98
Table 135 – CP 3/4: Assumed values for consistent set of PI calculation . 99
Table 136 – CP 3/5: AL service selection for an IO device . 100
Table 137 – CP 3/5: Additional AL service selection for an IO controller . 102
Table 138 – CP 3/5: Additional AL service selection for an IO supervisor . 102
Table 139 – CP 3/5: AL protocol selection for an IO device . 103
Table 140 – CP 3/5: AL protocol selection for an IO controller . 105
Table 141 – CP 3/5: Consistent set of PI for MinDeviceInterval=128 ms . 108
Table 142 – CP 3/5: Assumed values for consistent set of PI calculation . 109
Table 143 – CP 3/6: AL service selection for an IO device . 110
Table 144 – CP 3/6: Additional AL service selection for an IO controller . 112
Table 145 – CP 3/6: AL protocol selection for an IO device . 113
Table 146 – CP 3/6: AL protocol selection for an IO controller . 116
Table 147 – CP 3/6: Consistent set of PI for MinDeviceInterval = 1 ms and
NumberOfSwitches = 20 . 119
Table 148 – CP 3/6: Consistent set of PI for MinDeviceInterval = 1 ms and
NumberOfSwitches = 63 . 119
Table 149 – CP 3/6: Assumed values for consistent set of PI calculation . 120
Table 150 – CP 3/6: Consistent set of PI for MinDeviceInterval = 31,25 µs and
NumberOfSwitches = 10 . 121
Table 151 – CP 3/6: Assumed values for consistent set of PI calculation . 121
Table 152 – CP 3/7: AL service selection for an IO device . 122
Table 153 – CP 3/7: Additional AL service selection for an IO controller . 124
Table 154 – CP 3/7: AL protocol selection for an IO device . 125
Table 155 – CP 3/7: AL protocol selection for an IO controller . 127
Table 156 – CP 3/7: Consistent set of PI for MinDeviceInterval = 1 ms and
NumberOfSwitches = 20 . 130
Table 157 – CP 3/7: Consistent set of PI for MinDeviceInterval = 1 ms and
NumberOfSwitches = 63 . 131
Table 158 – CP 3/7: Assumed values for consistent set of PI calculation . 131
Table 159 – CP 3/7: Consistent set of PI for MinDeviceInterval = 31,25 µs and
NumberOfSwitches = 10 . 132
Table 160 – CP 3/7: Assumed values for consistent set of PI calculation . 133

– 8 – IEC 61784-2-3:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL NETWORKS –
PROFILES –
Part 2-3: Additional real-time fieldbus profiles
based on ISO/IEC/IEEE 8802-3 –
CPF 3
FOREWORD
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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 61784-2-3 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;
b) addition of new profile CP 3/7;
c) update of the requirements for all conformance classes;
d) updated timing requirements for IO devices;
e) refining the added application classes.
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 publication 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.

– 10 – IEC 61784-2-3:2023 © 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 E
...