IEC 61158-6-23:2019

Industrial communication networks - Fieldbus specifications - Part 6-23: Application layer protocol specification - Type 23 elements

IEC 61158-6-23:2019 provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 2 fieldbus. The term “time-critical” is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life.
This International Standard specifies interactions between remote applications and defines the externally visible behavior provided by the Type 2 fieldbus application layer. The purpose of this document is to define the protocol provided to
a) define the wire-representation of the service primitives defined in this document, and
b) define the externally visible behavior associated with their transfer. This document specifies the protocol of the Type 2 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545).
This second edition includes the following significant technical changes with respect to the previous edition:
- addition of the transmission extended mode and related attribute (Clauses 3.2.28, 4.1.9, 4.4, 5.2.9.2, and 5.3);
- update of Table 4, Table 5, Table 16 and Table 48.

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-23: Spécification du protocole de la couche application - Eléments de type 23

L’IEC 61158-6-23:2019 fournit des éléments communs pour les communications de messagerie prioritaires et non prioritaires élémentaires entre les programmes d’application des environnements d’automatisation et le matériel spécifique au bus de terrain de type 23. On utilise le terme "prioritaire" pour traduire la présence d’une fenêtre temporelle, à l’intérieur de laquelle il est exigé qu’une ou plusieurs actions spécifiées soient terminées avec un niveau de certitude défini. Si les actions spécifiées ne sont pas réalisées dans la fenêtre temporelle, les applications demandant les actions risquent de connaître une défaillance, avec les risques que cela comporte pour les équipements, les installations et éventuellement la vie humaine.
Le présent document vise à définir le protocole mis en place pour:
a) définir la représentation câblée des primitives de service définies dans l’IEC 61158 5 23, et
b) définir le comportement visible de l’extérieur associé à leur transfert.

General Information

• Status: Published
• Publication Date: 19-Jun-2019
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.70 - Application layer
• ICS: 35.110 - Networking
• Technical Committee: SC 65C - Industrial networks
• Drafting Committee: WG 9 - TC 65/SC 65C/WG 9
• Current Stage: DELPUB - Deleted Publication
• Start Date: 24-Mar-2023
• Completion Date: 26-Oct-2025

Relations

• Revises: IEC 61158-6-23:2014 - Industrial communication networks - Fieldbus specifications - Part 6-23: Application layer protocol specification - Type 23 elements
• Effective Date: 05-Sep-2023
• Revised: IEC 61158-6-23:2023 - Industrial communication networks - Fieldbus specifications - Part 6-23: Application layer protocol specification - Type 23 elements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61158-6-23 ®
Edition 2.0 2019-06
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-23: Application layer protocol specification – Type 23 elements

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.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
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 Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.

need further assistance, please contact the Customer Service

Centre: [e-mail].
IEC 61158-6-23 ®
Edition 2.0 2019-06
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –

Part 6-23: Application layer protocol specification – Type 23 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-7014-1

– 2 – IEC 61158-6-23:2019 © IEC 2019
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 13
1.1 General . 13
1.2 Specifications . 14
1.3 Conformance . 14
2 Normative references . 14
3 Terms, definitions, symbols, abbreviated terms and conventions . 15
3.1 Referenced terms and definitions . 15
3.1.1 ISO/IEC 7498-1 terms . 15
3.1.2 ISO/IEC 8822 terms . 15
3.1.3 ISO/IEC 9545 terms . 15
3.1.4 ISO/IEC 8824-1 terms . 15
3.1.5 IEC 61158-1 terms . 16
3.2 Additional Type 23 terms and definitions . 16
3.3 Symbols and abbreviated terms . 18
3.4 Conventions . 19
3.4.1 General concept . 19
3.4.2 Convention for the encoding of reserved bits and octets . 19
3.4.3 Conventions for abstract syntax description . 19
3.4.4 Conventions for bit description in octets . 20
3.4.5 Conventions for state machine descriptions . 20
4 FAL syntax description . 21
4.1 FALPDU type C abstract syntax . 21
4.1.1 Basic abstract syntax . 21
4.1.2 Connect-PDU . 22
4.1.3 ConnectAck-PDU . 22
4.1.4 Scan-PDU . 22
4.1.5 Collect-PDU . 23
4.1.6 Select-PDU . 23
4.1.7 Launch-PDU . 23
4.1.8 Token-PDU . 23
4.1.9 MyStatus-PDU . 24
4.1.10 Transient1-PDU . 24
4.1.11 Dummy-PDU . 25
4.1.12 Transient2-PDU . 25
4.1.13 NTNTest-PDU . 25
4.1.14 CyclicDataW-PDU. 26
4.1.15 CyclicDataB-PDU . 26
4.1.16 CyclicDataOut1-PDU . 26
4.1.17 CyclicDataOut2-PDU . 27
4.1.18 CyclicDataIn1-PDU . 27
4.1.19 CyclicDataIn2-PDU . 27
4.2 FALPDU type F abstract syntax . 28
4.2.1 Basic abstract syntax . 28
4.2.2 Persuasion-PDU . 29
4.2.3 TestData-PDU . 30

4.2.4 TestDataAck-PDU. 30
4.2.5 Setup-PDU . 31
4.2.6 SetupAck-PDU . 31
4.2.7 F-Token-PDU . 32
4.2.8 F-MyStatus-PDU . 32
4.2.9 Measure-PDU . 32
4.2.10 F-Offset-PDU . 33
4.2.11 F-Update-PDU . 33
4.2.12 F-CyclicData-PDU . 33
4.2.13 Transient1-PDU . 33
4.2.14 TransientAck-PDU . 36
4.2.15 Transient2-PDU . 37
4.2.16 ParamCheck-PDU . 37
4.2.17 Parameter-PDU . 38
4.2.18 Timer-PDU . 39
4.3 Data type assignments for type C . 39
4.4 Data type assignments for type F . 40
5 FAL transfer syntax . 41
5.1 Encoding rules . 41
5.1.1 Unsigned encoding . 41
5.1.2 Octet string encoding . 41
5.1.3 SEQUENCE encoding . 42
5.1.4 LOctetString encoding . 42
5.2 FALPDU type C elements encoding . 42
5.2.1 FALARHeader . 42
5.2.2 Connect-PDU . 44
5.2.3 ConnectAck-PDU . 45
5.2.4 Scan-PDU . 45
5.2.5 Collect-PDU . 46
5.2.6 Select-PDU . 48
5.2.7 Launch-PDU . 49
5.2.8 Token-PDU . 49
5.2.9 MyStatus-PDU . 49
5.2.10 Transient1-PDU . 51
5.2.11 Dummy-PDU . 55
5.2.12 Transient2-PDU . 56
5.2.13 NTNTest-PDU . 67
5.2.14 CyclicDataW-PDU. 67
5.2.15 CyclicDataB-PDU . 68
5.2.16 CyclicDataOut1-PDU . 69
5.2.17 CyclicDataOut2-PDU . 69
5.2.18 CyclicDataIn1-PDU . 70
5.2.19 CyclicDataIn2-PDU . 71
5.3 FALPDU type F elements encoding . 72
5.3.1 FALARHeader . 72
5.3.2 Persuasion-PDU . 76
5.3.3 TestData-PDU . 77
5.3.4 TestDataAck-PDU. 77
5.3.5 Setup-PDU . 78

– 4 – IEC 61158-6-23:2019 © IEC 2019
5.3.6 SetupAck-PDU . 80
5.3.7 F-Token-PDU . 82
5.3.8 F-Measure-PDU . 83
5.3.9 F-Offset-PDU . 83
5.3.10 F-Update-PDU . 84
5.3.11 F-MyStatus-PDU . 84
5.3.12 F-CyclicData-PDU . 89
5.3.13 Transient1-PDU . 90
5.3.14 TransientAck-PDU . 94
5.3.15 Transient2-PDU . 95
5.3.16 ParamCheck-PDU . 98
5.3.17 Parameter-PDU . 99
5.3.18 Timer-PDU . 106
6 Structure of the FAL protocol state machine . 106
7 FAL service protocol machine (FSPM) . 107
7.1 Overview. 107
7.2 FSPM type C . 107
7.2.1 Overview . 107
7.2.2 FSPM . 108
7.3 FSPM type F . 111
7.3.1 Overview . 111
7.3.2 FSPM . 113
8 Application relationship protocol machine (ARPM) . 118
8.1 ARPM type C . 118
8.1.1 Overview . 118
8.1.2 Acyclic transmission . 118
8.1.3 Cyclic transmission . 120
8.1.4 Connection control . 125
8.1.5 Common parameter dist . 163
8.2 ARPM type F . 168
8.2.1 Overview . 168
8.2.2 Acyclic transmission . 169
8.2.3 Cyclic transmission . 171
8.2.4 Channel control . 174
8.2.5 Parameter dist . 212
8.2.6 Synchronous trigger. 215
8.2.7 Timer . 217
8.2.8 Measure transmission . 218
9 DLL mapping protocol machine (DMPM) . 222
9.1 DMPM type C . 222
9.2 DMPM type F . 223
Bibliography . 225

Figure 1 – Bit description in octets . 20
Figure 2 – Structure for memory access information retrieve response . 59
Figure 3 – Attribute definitions . 59
Figure 4 – Access code definitions . 60
Figure 5 – Structure for RUN request . 61

Figure 6 – Structure for RUN response . 61
Figure 7 – Structure for STOP request . 62
Figure 8 – Structure for STOP response . 62
Figure 9 – Structure for batch memory read request . 62
Figure 10 – Structure for batch memory read response . 63
Figure 11 – Structure for random memory read request . 63
Figure 12 – Structure for random memory read response . 64
Figure 13 – Structure for batch memory write request . 65
Figure 14 – Structure for batch memory write response . 65
Figure 15 – Structure for random memory write request . 66
Figure 16 – Structure for random memory write response . 66
Figure 17 – Relationships between protocol machines . 107
Figure 18 – Structure of FSPM C . 108
Figure 19 – Structure of FSPM F. 111
Figure 20 – Structure of ARPM C . 118
Figure 21 – Structure of ARPM F . 168
Figure 22 – Structure of type C DMPM . 222
Figure 23 – Structure of type F DMPM . 224

Table 1 – State machine description elements . 20
Table 2 – Description of state machine elements . 20
Table 3 – Conventions used in state machines . 21
Table 4 – afFType . 42
Table 5 – priority . 43
Table 6 – portChoice. 44
Table 7 – portCheckResult . 45
Table 8 – dstPortInfo . 45
Table 9 – scanState . 45
Table 10 – nodeType . 46
Table 11 – loopState . 47
Table 12 – Cyclic status . 47
Table 13 – Parameter setting mode . 47
Table 14 – opState . 50
Table 15 – errorState . 50
Table 16 – Data type. 52
Table 17 – CPW. 52
Table 18 – CPWC . 53
Table 19 – CPWCR . 53
Table 20 – cmParam . 53
Table 21 – Details of param area . 54
Table 22 – Details of application parameters . 54
Table 23 – Details of LB/LW CM area and LB/LW CM additional area . 55
Table 24 – Details of LX/LY CM 1 area and LX/LY CM 2 area . 55

– 6 – IEC 61158-6-23:2019 © IEC 2019
Table 25 – Destination module flag . 57
Table 26 – Command types . 58
Table 27 – Access codes of network module memory . 60
Table 28 – Access codes of controller memory . 60
Table 29 – byteValidity . 67
Table 30 – afFType . 72
Table 31 – dataType . 73
Table 32 – varField . 74
Table 33 – nodeType . 74
Table 34 – ProtocolVerType . 75
Table 35 – Link status . 78
Table 36 – Port enable/disable specification . 79
Table 37 – Cyclic transmission parameter hold status . 86
Table 38 – Detailed application operation status . 86
Table 39 – Error detection status . 86
Table 40 – Slave-specific event reception status . 88
Table 41 – dataSupType of dataType (0x07) . 91
Table 42 – FieldSpecificTransient opHeader . 91
Table 43 – command (dataType: 0x07, dataSubType: 0x0002) . 92
Table 44 – subCommand type for each command type . 92
Table 45 – Structure of Deliver node information . 92
Table 46 – Structure of Deliver node information – message . 93
Table 47 – Structure of Get statistical information response . 93
Table 48 – Structure of Acquisition of node details response . 94
Table 49 – Execution module specification. 96
Table 50 – Command type . 97
Table 51 – Cyclic data state table . 109
Table 52 – Acyclic data state table. 109
Table 53 – Management state table . 111
Table 54 – Cyclic data state table . 114
Table 55 – Acyclic data state table. 114
Table 56 – Management state table . 117
Table 57 – Synchronization state table . 117
Table 58 – Measurement state table . 117
Table 59 – Acyclic transmission state table . 119
Table 60 – Acyclic transmission functions . 120
Table 61 – Cyclic transmission state table . 120
Table 62 – Cyclic transmission functions. 125
Table 63 – Connection control state machine – Initial . 126
Table 64 – Connection control state machine – Connect . 126
Table 65 – Connection control state machine – Scan . 128
Table 66 – Connection control state machine – ScanWait . 131
Table 67 – Connection control state machine – Collect . 134

Table 68 – Connection control state machine – CollectWait . 137
Table 69 – Connection control state machine – Select . 140
Table 70 – Connection control state machine – TokenStartWait . 143
Table 71 – Connection control state machine – LaunchWait . 146
Table 72 – Connection control state machine – TokenReleaseWait . 149
Table 73 – Connection control state machine – TokenReleased . 152
Table 74 – Connection control state machine – TokenWait . 157
Table 75 – Connection control state machine – NTNTestMaster . 162
Table 76 – Connection control state machine – NTNTestSlave . 162
Table 77 – Function list of connection control . 163
Table 78 – Common parameter dist state table . 163
Table 79 – Function list of connection control . 167
Table 80 – Mapping of internal service and acyclic transmission service . 168
Table 81 – Acyclic transmission states . 169
Table 82 – Acyclic transmission state table . 169
Table 83 – Acyclic transmission functions . 171
Table 84 – Acyclic transmission variables . 171
Table 85 – Cyclic transmission states . 172
Table 86 – Cyclic transmission state table . 172
Table 87 – Cyclic transmission functions. 174
Table 88 – Cyclic transmission variables. 174
Table 89 – Master station channel control states . 174
Table 90 – Slave station channel control states . 175
Table 91 – Master station state table – MasterDown . 175
Table 92 – Master station state table – Listen . 175
Table 93 – Master station state table – MasterArbitration . 177
Table 94 – Master station state table – PrimaryMasterScatterTD . 178
Table 95 – Master station state table – PrimaryMasterSettingUp . 180
Table 96 – Master station state table – PrimaryMasterHoldToken . 183
Table 97 – Master station state table – PrimaryMasterSolicitToken . 186
Table 98 – Master station state table – PrimaryMasterInviting . 188
Table 99 – Master station state table – MasterWaitTD . 190
Table 100 – Master station state table – MasterWaitSetup . 192
Table 101 – Master station state table – MasterSolictToken (without Transmission path
delay measurement) . 193
Table 102 – Master station state table – MasterSolictToken (with Transmission path
delay measurement) . 195
Table 103 – Master station state table – MasterHoldToken . 197
Table 104 – Master station state table – MasterMeasurement (without Transmission
path delay measurement function) . 200
Table 105 – Master station state table – MasterMeasurement (with Transmission path
delay measurement function) . 200
Table 106 – Slave station state table – SlaveDown . 200
Table 107 – Slave station state table – SlaveWaitTD . 201

– 8 – IEC 61158-6-23:2019 © IEC 2019
Table 108 – Slave station state table – SlaveWaitSetup . 202
Table 109 – Slave station state table – SlaveSolicitToken (without Transmission path
delay measurement) . 203
Table 110 – Slave station state table – SlaveSolicitToken (with Transmission path
delay measurement) . 204
Table 111 – Slave station state table – SlaveHoldToken . 206
Table 112 – Master station channel control functions . 209
Table 113 – Slave station channel control functions . 210
Table 114 – Master station channel control variables . 211
Table 115 – Slave station channel control variables . 211
Table 116 – Master station channel control timers . 212
Table 117 – Slave station channel control timers . 212
Table 118 – Master station parameter dist states . 212
Table 119 – Slave station parameter dist states . 212
Table 120 – Master station parameter dist state table . 213
Table 121 – Slave station parameter dist state table . 214
Table 122 – Master station parameter dist functions . 215
Table 123 – Slave station parameter dist functions . 215
Table 124 – Master station synchronous trigger states . 216
Table 125 – Slave station synchronous trigger states. 216
Table 126 – Master station synchronous trigger state table . 216
Table 127 – Slave station synchronous trigger state table . 216
Table 128 – Synchronous trigger functions . 216
Table 129 – Timer states – Best effort type . 217
Table 130 – Timer states – Fixed cycle type . 217
Table 131 – Timer state table – Best effort type . 217
Table 132 – Timer state table – Fixed cycle type . 217
Table 133 – Timer variables . 217
Table 134 – Fixed cycle timer . 218
Table 135 – Master station measure transmission states . 218
Table 136 – Slave station measure transmission states . 218
Table 137 – Master station measure transmission state table . 219
Table 138 – Slave station measure transmission state table . 220
Table 139 – Master station measure transmission functions . 221
Table 140 – Slave station measure transmission functions. 221
Table 141 – Master station measure transmission variables . 222
Table 142 – Mapping of type C DMPM service and DL service . 223
Table 143 – Destination address for each type C PDU . 223
Table 144 – Mapping of type F DMPM service and DL service . 224

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 6-23: Application layer protocol specification –
Type 23 elements
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 the associated protocol type is restricted by its
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 pro
...

IEC 61158-6-23 ®
Edition 2.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 6-23: Application layer protocol specification – Type 23 elements

Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 6-23: Spécification du protocole de la couche application – Eléments
de type 23
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 Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
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 online collection - oc.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
committee, …). It also gives information on projects, replaced have 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 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once 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: [e-mail].
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 - IEC online collection - oc.iec.ch
webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez
La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications. Avec un
en utilisant différents critères (numéro de référence, texte, abonnement, vous aurez toujours accès à un contenu à jour
comité d’études, …). Elle donne aussi des informations sur adapté à vos besoins.
les projets et les publications remplacées ou retirées.

Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au
Restez informé sur les nouvelles publications IEC. Just
monde, avec plus de 22 000 articles terminologiques en
Published détaille les nouvelles publications parues.
anglais et en français, ainsi que les termes équivalents dans
Disponible en ligne et une fois par mois par email.
16 langues additionnelles. Egalement appelé Vocabulaire

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:
[e-mail].
IEC 61158-6-23 ®
Edition 2.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –

Part 6-23: Application layer protocol specification – Type 23 elements

Réseaux de communication industriels – Spécifications des bus de terrain –

Partie 6-23: Spécification du protocole de la couche application – Eléments

de type 23
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-9327-0

– 2 – IEC 61158-6-23:2019 © IEC 2019
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 13
1.1 General . 13
1.2 Specifications . 14
1.3 Conformance . 14
2 Normative references . 14
3 Terms, definitions, symbols, abbreviated terms and conventions . 15
3.1 Referenced terms and definitions . 15
3.1.1 ISO/IEC 7498-1 terms . 15
3.1.2 ISO/IEC 8822 terms . 15
3.1.3 ISO/IEC 9545 terms . 15
3.1.4 ISO/IEC 8824-1 terms . 15
3.1.5 IEC 61158-1 terms . 16
3.2 Additional Type 23 terms and definitions . 16
3.3 Symbols and abbreviated terms . 18
3.4 Conventions . 19
3.4.1 General concept . 19
3.4.2 Convention for the encoding of reserved bits and octets . 19
3.4.3 Conventions for abstract syntax description . 19
3.4.4 Conventions for bit description in octets . 20
3.4.5 Conventions for state machine descriptions . 20
4 FAL syntax description . 21
4.1 FALPDU type C abstract syntax . 21
4.1.1 Basic abstract syntax . 21
4.1.2 Connect-PDU . 22
4.1.3 ConnectAck-PDU . 22
4.1.4 Scan-PDU . 22
4.1.5 Collect-PDU . 23
4.1.6 Select-PDU . 23
4.1.7 Launch-PDU . 23
4.1.8 Token-PDU . 23
4.1.9 MyStatus-PDU . 24
4.1.10 Transient1-PDU . 24
4.1.11 Dummy-PDU . 25
4.1.12 Transient2-PDU . 25
4.1.13 NTNTest-PDU . 25
4.1.14 CyclicDataW-PDU. 26
4.1.15 CyclicDataB-PDU . 26
4.1.16 CyclicDataOut1-PDU . 26
4.1.17 CyclicDataOut2-PDU . 27
4.1.18 CyclicDataIn1-PDU . 27
4.1.19 CyclicDataIn2-PDU . 27
4.2 FALPDU type F abstract syntax . 28
4.2.1 Basic abstract syntax . 28
4.2.2 Persuasion-PDU . 29
4.2.3 TestData-PDU . 30

4.2.4 TestDataAck-PDU. 30
4.2.5 Setup-PDU . 31
4.2.6 SetupAck-PDU . 31
4.2.7 F-Token-PDU . 32
4.2.8 F-MyStatus-PDU . 32
4.2.9 Measure-PDU . 32
4.2.10 F-Offset-PDU . 33
4.2.11 F-Update-PDU . 33
4.2.12 F-CyclicData-PDU . 33
4.2.13 Transient1-PDU . 33
4.2.14 TransientAck-PDU . 36
4.2.15 Transient2-PDU . 37
4.2.16 ParamCheck-PDU . 37
4.2.17 Parameter-PDU . 38
4.2.18 Timer-PDU . 39
4.3 Data type assignments for type C . 39
4.4 Data type assignments for type F . 40
5 FAL transfer syntax . 41
5.1 Encoding rules . 41
5.1.1 Unsigned encoding . 41
5.1.2 Octet string encoding . 41
5.1.3 SEQUENCE encoding . 42
5.1.4 LOctetString encoding . 42
5.2 FALPDU type C elements encoding . 42
5.2.1 FALARHeader . 42
5.2.2 Connect-PDU . 44
5.2.3 ConnectAck-PDU . 45
5.2.4 Scan-PDU . 45
5.2.5 Collect-PDU . 46
5.2.6 Select-PDU . 48
5.2.7 Launch-PDU . 49
5.2.8 Token-PDU . 49
5.2.9 MyStatus-PDU . 49
5.2.10 Transient1-PDU . 51
5.2.11 Dummy-PDU . 55
5.2.12 Transient2-PDU . 56
5.2.13 NTNTest-PDU . 67
5.2.14 CyclicDataW-PDU. 67
5.2.15 CyclicDataB-PDU . 68
5.2.16 CyclicDataOut1-PDU . 69
5.2.17 CyclicDataOut2-PDU . 69
5.2.18 CyclicDataIn1-PDU . 70
5.2.19 CyclicDataIn2-PDU . 71
5.3 FALPDU type F elements encoding . 72
5.3.1 FALARHeader . 72
5.3.2 Persuasion-PDU . 76
5.3.3 TestData-PDU . 77
5.3.4 TestDataAck-PDU. 77
5.3.5 Setup-PDU . 78

– 4 – IEC 61158-6-23:2019 © IEC 2019
5.3.6 SetupAck-PDU . 80
5.3.7 F-Token-PDU . 82
5.3.8 F-Measure-PDU . 83
5.3.9 F-Offset-PDU . 83
5.3.10 F-Update-PDU . 84
5.3.11 F-MyStatus-PDU . 84
5.3.12 F-CyclicData-PDU . 89
5.3.13 Transient1-PDU . 90
5.3.14 TransientAck-PDU . 94
5.3.15 Transient2-PDU . 95
5.3.16 ParamCheck-PDU . 98
5.3.17 Parameter-PDU . 99
5.3.18 Timer-PDU . 106
6 Structure of the FAL protocol state machine . 106
7 FAL service protocol machine (FSPM) . 107
7.1 Overview. 107
7.2 FSPM type C . 107
7.2.1 Overview . 107
7.2.2 FSPM . 108
7.3 FSPM type F . 111
7.3.1 Overview . 111
7.3.2 FSPM . 113
8 Application relationship protocol machine (ARPM) . 118
8.1 ARPM type C . 118
8.1.1 Overview . 118
8.1.2 Acyclic transmission . 118
8.1.3 Cyclic transmission . 120
8.1.4 Connection control . 125
8.1.5 Common parameter dist . 163
8.2 ARPM type F . 168
8.2.1 Overview . 168
8.2.2 Acyclic transmission . 169
8.2.3 Cyclic transmission . 171
8.2.4 Channel control . 174
8.2.5 Parameter dist . 212
8.2.6 Synchronous trigger. 215
8.2.7 Timer . 217
8.2.8 Measure transmission . 218
9 DLL mapping protocol machine (DMPM) . 222
9.1 DMPM type C . 222
9.2 DMPM type F . 223
Bibliography . 225

Figure 1 – Bit description in octets . 20
Figure 2 – Structure for memory access information retrieve response . 59
Figure 3 – Attribute definitions . 59
Figure 4 – Access code definitions . 60
Figure 5 – Structure for RUN request . 61

Figure 6 – Structure for RUN response . 61
Figure 7 – Structure for STOP request . 62
Figure 8 – Structure for STOP response . 62
Figure 9 – Structure for batch memory read request . 62
Figure 10 – Structure for batch memory read response . 63
Figure 11 – Structure for random memory read request . 63
Figure 12 – Structure for random memory read response . 64
Figure 13 – Structure for batch memory write request . 65
Figure 14 – Structure for batch memory write response . 65
Figure 15 – Structure for random memory write request . 66
Figure 16 – Structure for random memory write response . 66
Figure 17 – Relationships between protocol machines . 107
Figure 18 – Structure of FSPM C . 108
Figure 19 – Structure of FSPM F. 111
Figure 20 – Structure of ARPM C . 118
Figure 21 – Structure of ARPM F . 168
Figure 22 – Structure of type C DMPM . 222
Figure 23 – Structure of type F DMPM . 224

Table 1 – State machine description elements . 20
Table 2 – Description of state machine elements . 20
Table 3 – Conventions used in state machines . 21
Table 4 – afFType . 42
Table 5 – priority . 43
Table 6 – portChoice. 44
Table 7 – portCheckResult . 45
Table 8 – dstPortInfo . 45
Table 9 – scanState . 45
Table 10 – nodeType . 46
Table 11 – loopState . 47
Table 12 – Cyclic status . 47
Table 13 – Parameter setting mode . 47
Table 14 – opState . 50
Table 15 – errorState . 50
Table 16 – Data type. 52
Table 17 – CPW. 52
Table 18 – CPWC . 53
Table 19 – CPWCR . 53
Table 20 – cmParam . 53
Table 21 – Details of param area . 54
Table 22 – Details of application parameters . 54
Table 23 – Details of LB/LW CM area and LB/LW CM additional area . 55
Table 24 – Details of LX/LY CM 1 area and LX/LY CM 2 area . 55

– 6 – IEC 61158-6-23:2019 © IEC 2019
Table 25 – Destination module flag . 57
Table 26 – Command types . 58
Table 27 – Access codes of network module memory . 60
Table 28 – Access codes of controller memory . 60
Table 29 – byteValidity . 67
Table 30 – afFType . 72
Table 31 – dataType . 73
Table 32 – varField . 74
Table 33 – nodeType . 74
Table 34 – ProtocolVerType . 75
Table 35 – Link status . 78
Table 36 – Port enable/disable specification . 79
Table 37 – Cyclic transmission parameter hold status . 86
Table 38 – Detailed application operation status . 86
Table 39 – Error detection status . 86
Table 40 – Slave-specific event reception status . 88
Table 41 – dataSupType of dataType (0x07) . 91
Table 42 – FieldSpecificTransient opHeader . 91
Table 43 – command (dataType: 0x07, dataSubType: 0x0002) . 92
Table 44 – subCommand type for each command type . 92
Table 45 – Structure of Deliver node information . 92
Table 46 – Structure of Deliver node information – message . 93
Table 47 – Structure of Get statistical information response . 93
Table 48 – Structure of Acquisition of node details response . 94
Table 49 – Execution module specification. 96
Table 50 – Command type . 97
Table 51 – Cyclic data state table . 109
Table 52 – Acyclic data state table. 109
Table 53 – Management state table . 111
Table 54 – Cyclic data state table . 114
Table 55 – Acyclic data state table. 114
Table 56 – Management state table . 117
Table 57 – Synchronization state table . 117
Table 58 – Measurement state table . 117
Table 59 – Acyclic transmission state table . 119
Table 60 – Acyclic transmission functions . 120
Table 61 – Cyclic transmission state table . 120
Table 62 – Cyclic transmission functions. 125
Table 63 – Connection control state machine – Initial . 126
Table 64 – Connection control state machine – Connect . 126
Table 65 – Connection control state machine – Scan . 128
Table 66 – Connection control state machine – ScanWait . 131
Table 67 – Connection control state machine – Collect . 134

Table 68 – Connection control state machine – CollectWait . 137
Table 69 – Connection control state machine – Select . 140
Table 70 – Connection control state machine – TokenStartWait . 143
Table 71 – Connection control state machine – LaunchWait . 146
Table 72 – Connection control state machine – TokenReleaseWait . 149
Table 73 – Connection control state machine – TokenReleased . 152
Table 74 – Connection control state machine – TokenWait . 157
Table 75 – Connection control state machine – NTNTestMaster . 162
Table 76 – Connection control state machine – NTNTestSlave . 162
Table 77 – Function list of connection control . 163
Table 78 – Common parameter dist state table . 163
Table 79 – Function list of connection control . 167
Table 80 – Mapping of internal service and acyclic transmission service . 168
Table 81 – Acyclic transmission states . 169
Table 82 – Acyclic transmission state table . 169
Table 83 – Acyclic transmission functions . 171
Table 84 – Acyclic transmission variables . 171
Table 85 – Cyclic transmission states . 172
Table 86 – Cyclic transmission state table . 172
Table 87 – Cyclic transmission functions. 174
Table 88 – Cyclic transmission variables. 174
Table 89 – Master station channel control states . 174
Table 90 – Slave station channel control states . 175
Table 91 – Master station state table – MasterDown . 175
Table 92 – Master station state table – Listen . 175
Table 93 – Master station state table – MasterArbitration . 177
Table 94 – Master station state table – PrimaryMasterScatterTD . 178
Table 95 – Master station state table – PrimaryMasterSettingUp . 180
Table 96 – Master station state table – PrimaryMasterHoldToken . 183
Table 97 – Master station state table – PrimaryMasterSolicitToken . 186
Table 98 – Master station state table – PrimaryMasterInviting . 188
Table 99 – Master station state table – MasterWaitTD . 190
Table 100 – Master station state table – MasterWaitSetup . 192
Table 101 – Master station state table – MasterSolictToken (without Transmission path
delay measurement) . 193
Table 102 – Master station state table – MasterSolictToken (with Transmission path
delay measurement) . 195
Table 103 – Master station state table – MasterHoldToken . 197
Table 104 – Master station state table – MasterMeasurement (without Transmission
path delay measurement function) . 200
Table 105 – Master station state table – MasterMeasurement (with Transmission path
delay measurement function) . 200
Table 106 – Slave station state table – SlaveDown . 200
Table 107 – Slave station state table – SlaveWaitTD . 201

– 8 – IEC 61158-6-23:2019 © IEC 2019
Table 108 – Slave station state table – SlaveWaitSetup . 202
Table 109 – Slave station state table – SlaveSolicitToken (without Transmission path
delay measurement) . 203
Table 110 – Slave station state table – SlaveSolicitToken (with Transmission path
delay measurement) . 204
Table 111 – Slave station state table – SlaveHoldToken . 206
Table 112 – Master station channel control functions . 209
Table 113 – Slave station channel control functions . 210
Table 114 – Master station channel control variables . 211
Table 115 – Slave station channel control variables . 211
Table 116 – Master station channel control timers . 212
Table 117 – Slave station channel control timers . 212
Table 118 – Master station parameter dist states . 212
Table 119 – Slave station parameter dist states . 212
Table 120 – Master station parameter dist state table . 213
Table 121 – Slave station parameter dist state table . 214
Table 122 – Master station parameter dist functions . 215
Table 123 – Slave station parameter dist functions . 215
Table 124 – Master station synchronous trigger states . 216
Table 125 – Slave station synchronous trigger states. 216
Table 126 – Master station synchronous trigger state table . 216
Table 127 – Slave station synchronous trigger state table . 216
Table 128 – Synchronous trigger functions . 216
Table 129 – Timer states – Best effort type . 217
Table 130 – Timer states – Fixed cycle type . 217
Table 131 – Timer state table – Best effort type . 217
Table 132 – Timer state table – Fixed cycle type . 217
Table 133 – Timer variables . 217
Table 134 – Fixed cycle timer . 218
Table 135 – Master station measure transmission states . 218
Table 136 – Slave station measure transmission states . 218
Table 137 – Master station measure transmission state table . 219
Table 138 – Slave station measure transmission state table . 220
Table 139 – Master station measure transmission functions . 221
Table 140 – Slave station measure transmission functions. 221
Table 141 – Master station measure transmission variables . 222
Table 142 – Mapping of type C DMPM service and DL service . 223
Table 143 – Destination address for each type C PDU . 223
Table 144 – Mapping of type F DMPM service and DL service . 224

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 6-23: Application layer protocol specification –
Type 23 elements
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 interest
...