IEC 61784-1-5:2023

IEC 61784-1-5 ®
Edition 1.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial networks – Profiles –
Part 1-5: Fieldbus profiles – Communication Profile Family 5

Réseaux industriels – Profils –
Partie 1-5: Profils de bus de terrain – Famille de profils de communication 5

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IEC 61784-1-5 ®
Edition 1.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial networks – Profiles –

Part 1-5: Fieldbus profiles – Communication Profile Family 5

Réseaux industriels – Profils –

Partie 1-5: Profils de bus de terrain – Famille de profils de communication 5

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 35.100.20; 35.240.50 ISBN 978-2-8322-6589-5

– 2 – IEC 61784-1-5:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, abbreviated terms, symbols, and conventions . 8
3.1 Terms and definitions . 8
3.2 Abbreviations and symbols . 8
3.2.1 Common abbreviations and symbols . 8
3.2.2 Other abbreviations and symbols . 8
3.3 Conventions . 8
4 CPF 5 (WorldFIP®) . 8
4.1 General overview . 8
4.2 CP 5/1 (WorldFIP) . 9
4.2.1 Physical layer . 9
4.2.2 Data-link layer . 11
4.2.3 Application layer . 14
4.3 CP 5/2 (WorldFIP) . 20
4.3.1 Physical layer . 20
4.3.2 Data-link layer . 20
4.3.3 Application layer . 20
4.4 CP 5/3 (WorldFIP) . 26
4.4.1 Physical layer . 26
4.4.2 Data-link layer . 26
4.4.3 Application layer . 26
Annex A (informative) CPF 5 (WorldFIP) communication concepts . 28
A.1 Physical layer characteristics . 28
A.2 Data-link layer characteristics . 28
A.3 Application layer characteristics . 28
Bibliography . 29

Table 1 – CPF 5: overview of profile sets . 9
Table 2 – CPF 5: PhL selection . 10
Table 3 – CPF 5: DLL service selection . 11
Table 4 – CPF 5: DLL service selection of Clause 4 . 12
Table 5 – CPF 5: DLL protocol selection . 12
Table 6 – CPF 5: DLL protocol selection of variables and resources . 13
Table 7 – CPF 5: DLL protocol selection of DLPDUs . 13
Table 8 – CP 5/1: AL service selection . 14
Table 9 – CP 5/1: AL service selection of ASEs . 14
Table 10 – CPF 5: AL service selection of MPS ASEs . 14
Table 11 – CPF 5: AL service selection of variable elements . 15
Table 12 – CPF 5: AL service selection of produced variable elements . 15
Table 13 – CPF 5: AL service selection of consumed variable elements . 15
Table 14 – CP 5/1: AL service selection of MPS services . 16

Table 15 – CP 5/1, 5/2: AL service selection of A_Readloc service parameters . 16
Table 16 – CP 5/1, 5/2: AL service selection of A_Readfar service parameters . 16
Table 17 – CP 5/1, 5/2: AL service selection of A_Read service parameters . 17
Table 18 – CP 5/1: AL service selection of MCS service classes . 17
Table 19 – CP 5/1: AL service selection of QoS . 17
Table 20 – CP 5/1: AL service selection of MCS services . 17
Table 21 – CP 5/1, 5/2: AL service selection of A_Data parameters . 18
Table 22 – CP 5/1: AL protocol selection . 18
Table 23 – CPF 5/1: AL protocol selection of MPS data types . 18
Table 24 – CPF 5/1: AL protocol selection of MPS PDUs . 18
Table 25 – CPF 5/1: AL protocol selection of MPS encoding rules . 19
Table 26 – CP 5/1, 5/2: AL protocol selection of MCS PDUs . 19
Table 27 – CP 5/1: AL protocol selection of MCS state machines . 20
Table 28 – CP 5/2: AL service selection . 20
Table 29 – CP 5/2: AL service selection of ASEs . 21
Table 30 – CP 5/2: AL service selection of MPS services . 21
Table 31 – CP 5/2: AL service selection of MCS service classes . 21
Table 32 – CP 5/2: AL service selection of QoS . 22
Table 33 – CP 5/2: AL service selection of MCS services . 22
Table 34 – CP 5/2: AL service selection of domain services . 22
Table 35 – CP 5/2: AL service selection of domain object attributes . 23
Table 36 – CP 5/2: AL service selection of program services . 23
Table 37 – CP 5/2: AL service selection of program object attributes . 23
Table 38 – CP 5/2: AL service selection of variable services . 24
Table 39 – CP 5/2: AL service selection of variable classes . 24
Table 40 – CP 5/2: AL service selection of variable class attributes . 24
Table 41 – CP 5/2: AL protocol selection . 24
Table 42 – CP 5/2: AL protocol selection of MCS state machines . 25
Table 43 – CP 5/2: AL protocol selection of sub-MMS coding rules . 25
Table 44 – CP 5/2: AL protocol selection of sub-MMS PDUs . 26
Table 45 – CP 5/3: AL service selection . 26
Table 46 – CP 5/3: AL service selection of ASEs . 27
Table 47 – CP 5/3: AL protocol selection . 27

– 4 – IEC 61784-1-5:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL NETWORKS –
PROFILES –
Part 1-5: Fieldbus profiles –
Communication Profile Family 5

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
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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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
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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 61784-1-5 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 fifth
edition of IEC 61784-1 published in 2019. This first edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to
IEC 61784-1:2019:
a) split of the original IEC 61784-1 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/1207/FDIS 65C/1236/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 61784-1 series, published under the general title Industrial networks
– Profiles – Part 1: Fieldbus profiles, 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 61784-1-5:2023 © IEC 2023
INTRODUCTION
The IEC 61784-1 series provides a set of Communication Profiles (CP) in the sense of
ISO/IEC TR 10000-1. These answer the need of identifying the protocol families co-existing
within the IEC 61158 series, as a result of the international harmonization of fieldbus
technologies available on the market. More specifically, these profiles help to correctly state
the compliance with the IEC 61158 series, and to avoid the spreading of divergent
implementations, which would limit its use, clearness and understanding. Additional profiles to
address specific market concerns, such as functional safety or information security, can be
addressed by future parts of the IEC 61784-1 series.
The IEC 61784-1 series contains several Communication Profile Families (CPF), which specify
one or more communication profiles. Such profiles identify, in a strict sense, protocol subsets
of the IEC 61158 series via protocol specific communication profiles. They do not define device
profiles that specify communication profiles together with application functions needed to
answer the need of a specific application ("application profiles").
It is agreed that these latter classes of profiles would facilitate the use of the IEC 61158 series
of standards; the profiles defined in the IEC 61784-1 series are a necessary step to achieve
that task.
It is also important to clarify that interoperability – defined as the ability of two or more network
systems to exchange information and to make mutual use of the information that has been
exchanged (see ISO/IEC TR 10000-1) – can be directly achieved on the same link only for those
devices complying with the same communication profile.
Profiles contained in the IEC 61784-1 series are constructed of references to IEC 61158-2 and
the IEC 61158-3, IEC 61158-4, IEC 61158-5 and IEC 61158-6 series, and other IS, TS or
worldwide-accepted standards, as appropriate . Each profile is required to reference at least
one part of the IEC 61158 series in addition to IEC 61158-1.
Two or more Profiles, which are related to a common family, are specified within a
"Communication Profile Family" (CPF).

___________
International Standardised Profiles may contain normative references to specifications other than International
Standards; see ISO/IEC JTC 1 N 4047: The Normative Referencing of Specifications other than International
Standards in JTC 1 International Standardized Profiles – Guidelines for ISP Submitters.

INDUSTRIAL NETWORKS –
PROFILES –
Part 1-5: Fieldbus profiles –
Communication Profile Family 5

1 Scope
This part of IEC 61784-1 defines Communication Profile Family 5 (CPF 5). CPF 5 specifies a
set of protocol specific communication profiles (CPs) based on the IEC 61158 series (Type 7)
and other standards, to be used in the design of devices involved in communications in factory
manufacturing and process control.
NOTE 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.
Each CP selects an appropriate consistent and compatible subset of services and protocols
from the relevant set that is defined and modelled in the IEC 61158 series. For the selected
subset of services and protocols, the profile also describes any possible or necessary
constraints in parameter values.
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 61158-3-7:2007, Industrial communication networks – Fieldbus specifications – Part 3-7:
Data-link layer service definition – Type 7 elements
IEC 61158-4-7:2007, Industrial communication networks – Fieldbus specifications – Part 4-7:
Data-link layer protocol specification – Type 7 elements
IEC 61158-5-7:2007, Industrial communication networks – Fieldbus specifications – Part 5-7:
Application layer service definition – Type 7 elements
IEC 61158-6-7:2007, Industrial communication networks – Fieldbus specifications – Part 6-7:
Application layer protocol specification – Type 7 elements
IEC 61784-1-0:2023, Industrial networks – Profiles – Part 1-0: Fieldbus profiles – General
concepts and terminology
IEC 61784-1-1:2023, Industrial networks – Profiles – Part 1-1: Fieldbus profiles –
Communication Profile Family 1

– 8 – IEC 61784-1-5:2023 © IEC 2023
IETF RFC 791, J. Postel, Internet Protocol, September 1981, available at https://www.rfc-
editor.org/info/rfc791 [viewed 2022-02-18]
IETF RFC 793, J. Postel, Transmission Control Protocol, September 1981, available at
https://www.rfc-editor.org/info/rfc793 [viewed 2022-02-18]
3 Terms, definitions, abbreviated terms, symbols, and conventions
3.1 Terms and definitions
For the purposes of this document, all terms and definitions provided in the IEC 61158 series
and IEC 61784-1-0 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 Abbreviations and symbols
3.2.1 Common abbreviations and symbols
For the purposes of this document, all abbreviations and symbols defined in the IEC 61158
series and IEC 61784-1-0 apply.
CP communication profile
CPF communication profile family
MAU medium attachment unit
3.2.2 Other abbreviations and symbols
IP internet protocol (see IETF RFC 791)
TCP terminal control protocol (see IETF RFC 793)
3.3 Conventions
For the purposes of this document, the conventions defined in IEC 61784-1-0 apply.
4 CPF 5 (WorldFIP® )
4.1 General overview
The WorldFIP network is a very flexible and versatile transmission system. The range of
functions and performances permit the definition of a large number of profiles to match exactly
the requirements of the applications. As a practical approach, the three most popular profiles
are developed in this document; they address both time critical context and mission critical
functions. Other profiles will be defined for purpose specific application by selecting the
appropriate services and protocols in the IEC 61158 series, but respecting the minimum core
which is necessary to set up, operate and monitor the network.
___________
WorldFIP is the trade name of ALSTOM company. This information is given for the convenience of users of this
document and does not constitute an endorsement by IEC of the trade names holder or any of its products.
Compliance with this profile does not require use of the registered trade name. Use of the trade names requires
permission of the trade name holder.

All the terms are defined in the base standards: IEC 61158-2, IEC 61158-3-7, IEC 61158-4-7,
IEC 61158-5-7 and IEC 61158-6-7.
All the defined profiles are composed of a selection of services and protocols from the
IEC 61158 series, Type 7, and tuned by a selection of particular parameters within each service
or protocol.
All the WorldFIP profiles are based on a common core set of services of MPS, to which is added
an appropriated selection of services providing one or more selected appropriated features.
Table 1 summarizes the element selection of the relative profiles.
Table 1 – CPF 5: overview of profile sets
Profile 5/1 Profile 5/2 Profile 5/3
Application (MPS, MCS) of (MPS, MCS, SubMMS) of (MPS) of
IEC 61158-5-7, IEC 61158-5-7, IEC 61158-5-7,
IEC 61158-6-7 IEC 61158-6-7 IEC 61158-6-7
Data-link IEC 61158-3-7, IEC 61158-3-7, IEC 61158-3-7,
IEC 61158-4-7 IEC 61158-4-7 IEC 61158-4-7
Physical Type 1 of IEC 61158-2 Type 1 of IEC 61158-2 Type 1 of IEC 61158-2

The selection defined in Table 1 represents the most frequently basic used profiles.
The distinctive features of the different profiles in the basic version are the following:
– Profile 5/1, long messages, wide network topology, loose time-critical purpose-built
application layer;
– Profile 5/2, large messages, tight time-critical exchanges, mission-critical application,
IEC 61158-5-7 and IEC 61158-6-7 (application layer);
– Profile 5/3, open WorldFIP interface for other purpose-built or standardized tight time-critical
application layers (segmented or not).
NOTE See Annex A for an overview of WorldFIP communications concepts.
It should be emphasized that profile 5/3 may be fitted with web type upper stack profile
containing TCP/IP, BSD sockets, HTTP over DLL access point. The addition of this side stack
does not impact the profile definition. This important feature permits a TRANSPARENT access
of Fieldbus device from remote browser, as long as the field devices implement an EMBEDDED
SERVER. This is an additional integration provided by the profiles to federate intelligent Field
device into distributed Control Systems.
The physical layers indicated in this document are those relative to the selected profiles. But
variants may be defined in the future, using other WorldFIP approved physical layer options for
further applications such as high speed radio or very high speed on fiber or copper.
4.2 CP 5/1 (WorldFIP)
4.2.1 Physical layer
Table 2 specifies the physical layer profile within IEC 61158-2. It is common to all of the CPF 5
profiles.
– 10 – IEC 61784-1-5:2023 © IEC 2023
Table 2 – CPF 5: PhL selection
Clause Header Presence Constraints
1 Scope YES —
2 Normative references Partial Used if needed
3 Terms and definitions — —
3.1 Common terms and definitions Partial Used when
applicable
3.2 Type 1: Terms and definitions YES —
Next — NO —
subclauses
4 Symbols and abbreviated terms — —
4.1 Symbols — —
4.1.1 Type 1: Symbols YES —
Next — NO —
subclauses
4.2 Abbreviated terms — —
4.2.1 Type 1: Additional abbreviations YES —
Next — NO —
subclauses
5 Data-link layer – Physical Layer interface — —
5.1 General Partial Used as needed
5.2 Type 1: Required services YES —
Next — NO —
subclauses
6 Station Management – Physical Layer interface — —
6.1 General Partial Used as needed
6.2 Type 1: Station Management – Physical Layer interface Partial Used as needed
Next — NO —
subclauses
7 DCE Independent Sublayer (DIS) — —
7.1 General Partial Used as needed
7.2 Type 1: DIS YES —
Next — NO —
subclauses
8 DTE – DCE interface NO —
9 Medium Dependent Sublayer (MDS) NO —
10 MDS – MAU interface — —
10.1 General Partial Used as needed
Used as
10.2 Type 1: MDS – MAU interface: wire and optical media Partial
appropriate
Next — NO —
subclauses
11 Type 1 and 7: Medium Attachment Unit: voltage mode, linear-bus- Partial See Note
topology 150 Ω twisted-pair wire medium
12 Type 1 and 3: Medium Attachment Unit: 31,25 kbit/s, voltage-mode YES See Note
with low-power option, bus- and tree-topology, 100 Ω wire medium
13 – 14 — NO —
15 Type 1 and 7: Medium Attachment Unit: dual-fiber optical media YES See Note
16 – 20 — NO —
Clause Header Presence Constraints
21 Type 3: Medium Attachment Unit: Synchronous transmission, YES See Note
31,25 kbit/s, voltage mode, wire medium
Next clauses — NO —
Annex A Type 1: Connector specification — —
A.1 Internal Connector for wire medium YES See Note
A.2 External Connectors for wire medium YES See Note
A.3 External Connectors for optical medium YES See Note
Annex B Type 1: Cable specifications and trunk and spur lengths for YES See Note
the 31,25 kbit/s voltage-mode MAU
Annex C Type 1: Optical passive stars YES See Note
Annex D Type 1: Star topology YES See Note
Annex E Type 1: Alternate fibers YES See Note
Next annexes NO —
NOTE The selection could be an alternate solution for the specified profile.

4.2.2 Data-link layer
4.2.2.1 DLL service selection
Table 3 specifies the DLL service selection within IEC 61158-3-7 for this profile. It is common
to all of the CPF 5 profiles.
Table 3 – CPF 5: DLL service selection
Clause Header Presence Constraints
1 Scope YES —
2 Normative references Partial Used as needed
3 Terms, definitions, symbols, abbreviations and Partial Used as needed
conventions
4 Data-link layer services and concepts Partial See Table 4

– 12 – IEC 61784-1-5:2023 © IEC 2023
Table 4 – CPF 5: DLL service selection of Clause 4
Clause Header Presence Constraints
4.1 Field of application, object YES —
4.2 General description of services YES —
4.3 Sequences of primitives YES —
4.4 Buffer writing YES See Note 1
4.5 Buffer reading YES See Note 1
4.6 Buffer transfer YES —
4.7 Explicit request for buffer transfer Partial See Note 2
4.8 Unacknowledged message transfer Partial See Note 3
4.9 Acknowledged message transfer Partial See Note 3
NOTE 1 The maximum length of exchanged DLS-user-data can be either 120 or 128 bytes.
NOTE 2 The two update services are each optional.
NOTE 3 The service is optional. When implemented, the maximum length of exchanged DLS-user-data can be
either 122 bytes or 256 bytes.

4.2.2.2 DLL protocol selection
Table 5 specifies the DLL protocol selection within IEC 61158-4-7 for this profile. It is common
to all of the CPF 5 profiles.
Table 5 – CPF 5: DLL protocol selection
Clause Header Presence Constraints
1 Scope YES —
2 Normative references Partial Used as needed
3 Terms, definitions, symbols and abbreviations Partial Used as needed
4 Overview of the DL-protocol YES See Table 6 for a list of
mandatory and optional
variables and resources
5 General structure and encoding of PhIDUs and DLPDUs YES See Table 7 for a list of
and related elements of procedure mandatory and optional
DLPDUs
6 DLPDU-specific structure, encoding and element of YES —
procedure
7 DL-service elements of procedure, interfaces and YES —
conformance
Annex A Exemplary FCS implementations YES —
Annex B Object modeling YES —
Annex C Topology of multi-segment DL-subnetwork YES —
Annex D Management of transmission errors YES —

Table 6 – CPF 5: DLL protocol selection of variables and resources
Clause Variable or resource name Usage Constraints
4.2.1 B_DATprod M 
4.2.1 B_REQ
O 
4.2.1 Q_MSGcyc
O 
4.2.1 RQ O 
4.2.1 PR O

4.2.1 RQ_INHIBIT
O 
4.2.1 B_DATcons M 
4.2.1 Q_MSGaper O 
4.2.1 Q_MSGrec
O 
4.2.1 Q_REQ1 O 
4.2.1 Q_REQ2 O 
4.2.2 Q_IDRQ1
O 
4.2.2 Q_IDRQ2
O 
4.2.2 Q_RPRQ O 
4.2.2 Q_IDMSG O

Table 7 – CPF 5: DLL protocol selection of DLPDUs
Clause DLPDU name Usage Constraints
5.5.1 ID_DAT M

5.5.1 ID_MSG O 
5.5.1 ID_RQ1 O See Note
5.5.1 ID_RQ2 O See Note
5.5.2 RP_DAT M See Note
5.5.2 RP_DAT_MSG O See Note
5.5.2 RP_DAT_RQ1 O See Note
5.5.2 RP_DAT_RQ2 O See Note
5.5.2 RP_DAT_RQ1_MSG O See Note
5.5.2 RP_DAT_RQ2_MSG O See Note
5.5.4 RP_MSG_ACK O See Note
5.5.4 RP_MSG_NOACK O See Note
5.5.5 RP_ACK+ O 
5.5.5 RP_ACK- O

5.5.3 RP_RQ1 O 
5.5.3 RP_RQ2 O 
5.5.6 RP_END O

NOTE The need for this DLPDU is implementation dependent.

– 14 – IEC 61784-1-5:2023 © IEC 2023
4.2.3 Application layer
4.2.3.1 AL service selection
Table 8 specifies the AL service selection within IEC 61158-5-7 for this profile.
Table 8 – CP 5/1: AL service selection
Clause Header Presence Constraints
1 Scope YES —
2 Normative references Partial Used as needed
3 Terms, definitions, symbols, abbreviations and Partial Used as needed
conventions
4 Concepts YES Used as needed
5 Data type ASE YES —
6 Communication model specification Partial See Table 9

Table 9 – CP 5/1: AL service selection of ASEs
Clause Header Presence Constraints
6.2.1 MPS ASE (periodic/aPeriodic manufacturing services) Partial See Table 10 and Table 14
6.2.2 Virtual model of a device (VMD) ASE NO —
6.2.3 Domain ASE NO —
6.2.4 Program invocation (PI) ASE NO —
6.2.5 Variable ASE NO —
6.2.6 Event ASE NO —
6.2.7 Directory ASE NO —
6.3.1 Messaging common service (MCS) AR ASE Partial See Table 18

Table 10 – CPF 5: AL service selection of MPS ASEs
Clause Header Presence Constraints
6.2.1.3.2.2 Variable generic class specification Partial See Table 11
6.2.1.3.2.4 Produced variable class specification Partial See Table 12
6.2.1.3.2.6 Consumed variable class specification Partial See Table 13
6.2.1.3.2.8 Third party variable class specification NO —
6.2.1.3.2.10 Type constructor class specification NO —
6.2.1.4 Variable list NO —
Table 11 – CPF 5: AL service selection of variable elements
Parameter ref. Parameter name Usage Constraints
6.2.1.3.2.2 A_Name M 
6.2.1.3.2.2 Reference Type Constructor NO —
6.2.1.3.2.2 Transmitted Status M 
6.2.1.3.2.2 Significant Status M

6.2.1.3.2.2 Identifier M 
6.2.1.3.2.2 Transmission Mode M See Note
6.2.1.3.2.2 Network Period M

6.2.1.3.2.2 Class M Normal only
6.2.1.3.2.2 Consistency Variable NO —
6.2.1.3.2.2 Reference variable list NO —
6.2.1.3.2.2 Public value M See Note
6.2.1.3.2.2 Universal services requested NO —
NOTE This parameter is implementation dependent.

Table 12 – CPF 5: AL service selection of produced variable elements
Parameter ref. Parameter name Usage Constraints
6.2.1.3.2.4 Refreshment Elaborated O Asynchronous only
6.2.1.3.2.4 Punctual Refreshment Elaborated NO —
6.2.1.3.2.4 Resynchronization Variable NO —
6.2.1.3.2.4 Emission Indication O 

Table 13 – CPF 5: AL service selection of consumed variable elements
Parameter ref. Parameter name Usage Constraints
6.2.1.3.2.6 Promptness Elaborated O Asynchronous only
6.2.1.3.2.6 Punctual Promptness Elaborated NO —
6.2.1.3.2.6 Resynchronization Variable NO —
6.2.1.3.2.6 Reception Indication O

– 16 – IEC 61784-1-5:2023 © IEC 2023
Table 14 – CP 5/1: AL service selection of MPS services
Service ref. Service name Usage Constraint
6.2.1.3.4.2 A_Readloc M See Table 15
6.2.1.3.4.3 A_Writeloc M 
6.2.1.3.4.4 A_Update O 
6.2.1.3.4.5 A_Readfar O See Table 15
6.2.1.3.4.6 A_Writefar O 
6.2.1.3.4.7 A_Send M

6.2.1.3.4.8 A_Received M

6.2.1.3.5.2 A_Read O See Table 15
6.2.1.3.5.3 A_Write O

6.2.1.4.3.1 A_Readlist NO —
Table 15 – CP 5/1, 5/2: AL service selection of A_Readloc service parameters
Parameter ref. Parameter name Usage Constraint
6.2.1.3.4.2 Variable Specification M

6.2.1.3.4.2 Value M 
6.2.1.3.4.2 Refreshment status O 
6.2.1.3.4.2 Punctual Refreshment Status NO —
6.2.1.3.4.2 Promptness Status O 
6.2.1.3.4.2 Punctual Promptness Status NO —

Table 16 – CP 5/1, 5/2: AL service selection of A_Readfar service parameters
Parameter ref. Parameter name Usage Constraint
6.2.1.3.4.5 Variable Specification M 
6.2.1.3.4.5 Priority M

6.2.1.3.4.5 Value M 
6.2.1.3.4.5 Refreshment status O 
6.2.1.3.4.5 Punctual Refreshment Status NO —
6.2.1.3.4.5 Promptness Status O 
6.2.1.3.4.5 Punctual Promptness Status NO —

Table 17 – CP 5/1, 5/2: AL service selection of A_Read service parameters
Parameter ref. Parameter name Usage Constraint
6.2.1.3.5.2 Variable Specification M 
6.2.1.3.5.2 Priority M

6.2.1.3.5.2 Value M

6.2.1.3.5.2 Refreshment status O 
6.2.1.3.5.2 Punctual Refreshment Status NO —
6.2.1.3.5.2 Promptness Status O 
6.2.1.3.5.2 Punctual Promptness Status NO —

Table 18 – CP 5/1: AL service selection of MCS service classes
Class ref. Class name Usage Constraints
6.3.1.2 negotiated NO 
6.3.1.2 predefined M See Table 19 and Table 20
6.3.1.2 without negotiation NO 

Table 19 – CP 5/1: AL service selection of QoS
QoS ref. QoS name Usage Constraints
6.3.1.2.3.2 Duration of Establishment NO 
6.3.1.2.3.3 PDU size M See Note
6.3.1.2.3.4 Transfer Rate M 1, Cyclical channel
6.3.1.2.3.5 Number of Retries M Number = 1
6.3.1.2.3.6 Anticipation Factor M Number = 0 or 1; see Note
6.3.1.2.3.7 SDU Size M User SDU size ≤ 64K Bytes
6.3.1.2.3.8 Termination Duration NO

6.3.1.2.3.9 Priority NO 
NOTE The QoS is implementation dependent.

Table 20 – CP 5/1: AL service selection of MCS services
Service ref. Service name Usage Constraint
6.3.1.3.2 A_Associate NO —
6.3.1.3.3 A_Release NO —
6.3.1.3.4 A_Abort NO —
6.3.1.3.5 A_Data Partial See Table 21
6.3.1.3.6 A_Unidata NO —
– 18 – IEC 61784-1-5:2023 © IEC 2023
Table 21 – CP 5/1, 5/2: AL service selection of A_Data parameters
Parameter ref. Parameter name Usage Constraint
6.3.1.3.5.2 Acknowledgement request M 
6.3.1.3.5.2 User information M
User SDU size ≤ 64K Bytes
6.3.1.3.5.2 Transfer result M

4.2.3.2 AL protocol selection
Table 22 specifies the AL protocol selection within IEC 61158-6-7 for this profile.
Table 22 – CP 5/1: AL protocol selection
Clause Header Presence Constraints
1 Scope YES —
2 Normative references Partial Used as needed
3 Terms, definitions, symbols, Partial Used as needed
abbreviations and conventions
4 – 11 See 61158-6-7 YES See Table 23 through Table 27

No constraints are specified in the ASN1 types. Table 23 indicates the constraint on the types
that differ from the ASN1 types.
Table 23 – CPF 5/1: AL protocol selection of MPS data types
Clause Header Presence Constraints
4.1.1 Boolean YES —
4.1.2 Integer YES —
4.1.3 Bit String YES —
4.1.4 Octet String YES —
4.1.5 Sequence YES —
4.1.6 Choice YES —
4.1.7 Null YES —
4.1.8 Object Identifier YES —
4.1.9 Default NO —
Table 24 – CPF 5/1: AL protocol selection of MPS PDUs
Clause Header Presence Constraints
5.2.1.4.2 VariableCompactValue PDU YES —
5.2.1.4.3 ExplicitVariableValue PDU NO

5.2.1.4.4 VariableDescription PDU NO 
5.2.1.4.5 AccessDescription PDU NO

5.2.1.4.6 TypeDescription PDU NO

5.2.1.4.6 ListDescription PDU NO 
5.2.1.4.7 PDU Extensions NO 

Table 25 – CPF 5/1: AL protocol selection of MPS encoding rules
Clause Header Presence Constraints
5.2.1.4.2.2 Boolean YES 
5.2.1.4.2.3 Integer YES

5.2.1.4.2.4 Bitstring YES

5.2.1.4.2.5 Unsigned YES 
5.2.1.4.2.6 Octetstring YES

5.2.1.4.2.7 Visiblestring YES

5.2.1.4.2.8 Generalized Time YES 
5.2.1.4.2.9 Floating Point YES 
5.2.1.4.2.10 Binary time YES

5.2.1.4.2.11 BCD YES 
5.2.1.4.2.12 Structure YES 
5.2.1.4.2.13 Array NO

5.2.1.4.2.14 Compact
...