IEC 61158-5-22:2010
(Main)Industrial communication networks - Fieldbus specifications - Part 5-22: Application layer service definition - Type 22 elements
Industrial communication networks - Fieldbus specifications - Part 5-22: Application layer service definition - Type 22 elements
IEC 61158-5-22:2010 specifies the structure and services of the type 22 IEC fieldbus Application Layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498) and the OSI Application Layer Structure (ISO/IEC 9545). This standard cancels and replaces IEC/PAS 61158-5-22 published in 2009. This bilingual version published in 2012-01 corresponds to the English version published in 2010-08.
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 5-22: Définition des services de la couche application - Éléments de Type 22
La CEI 61158-5-22:2010 spécifie la structure et les services de la couche application des bus de terrain de Type 22, en conformité avec le Modèle de référence de base de l'OSI (ISO/CEI 7498-1) et la structure de la couche application de l'OSI (ISO/CEI 9545). La présente norme annule et remplace la IEC/PAS 61158-5-22 publiée en 2009. et constitue une révision technique. La présente version bilingue publiée en 2012-01 correspond à la version anglaise monolingue publiée en 2010-08.
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IEC 61158-5-22
®
Edition 1.0 2010-08
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 5-22: Application layer service definition – Type 22 elements
IEC 61158-5-22:2010(E)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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IEC 61158-5-22
®
Edition 1.0 2010-08
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 5-22: Application layer service definition – Type 22 elements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XC
ICS 25.04.40; 35.100.70; 35.110 ISBN 978-2-88912-115-1
® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – 61158-5-22 © IEC:2010(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
1.1 Overview .7
1.2 Specifications.8
1.3 Conformance.8
2 Normative references .8
3 Terms, definitions, abbreviations, symbols and conventions .9
3.1 ISO/IEC 7498-1 terms .9
3.2 ISO/IEC 8822 terms .9
3.3 ISO/IEC 9545 terms .9
3.4 ISO/IEC 8824-1 terms .10
3.5 Type 22 fieldbus application-layer specific definitions.10
3.6 Abbreviations and symbols.13
3.7 Conventions .16
4 Concepts .19
4.1 Common concepts.19
4.2 Type specific concepts .19
5 Data type ASE.23
5.1 Overview .23
5.2 Formal definition of data type objects .23
5.3 FAL defined data types.23
6 Communication model specification.31
6.1 Application service elements (ASEs) .31
6.2 Application relationships (ARs).74
Bibliography.79
Figure 1 – Producer-consumer interaction model .21
Figure 2 – RTFL device reference model .22
Figure 3 – RTFN device reference model.23
Figure 4 – Type 22 CeS device structure .32
Figure 5 – Successful SDO expedited download sequence .46
Figure 6 – Successful SDO normal download initialization sequence .46
Figure 7 – Successful SDO download sequence .46
Figure 8 – Successful SDO expedited upload sequence.47
Figure 9 – Successful SDO normal upload initialization sequence.47
Figure 10 – Successful SDO upload sequence.47
Figure 11 – Failed SDO expedited download initialization sequence .48
Figure 12 – Failed SDO download after initialization sequence .48
Figure 13 – Failed SDO download sequence.48
Figure 14 – Emergency sequence.49
Figure 15 – Heartbeat sequence .49
Figure 16 – Process data write sequence.50
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61158-5-22 © IEC:2010(E) – 3 –
Figure 17 – PDO mapping principle .50
Figure 18 – Process data object.51
Figure 19 – SEF service sequence.64
Table 1 – Object dictionary structure.32
Table 2 – Initiate SDO expedited download service.54
Table 3 – Initiate SDO normal download service .55
Table 4 – SDO download service .56
Table 5 – Initiate SDO expedited upload service .57
Table 6 – Initiate SDO normal upload service .58
Table 7 – SDO upload service .60
Table 8 – SDO abort service.61
Table 9 – Process data write service.62
Table 10 – Emergency service (EMCY).62
Table 11 – Heartbeat service .63
Table 12 – Send frame service .65
Table 13 – AL-Network verification service .67
Table 14 – AL-RTFL configuration service .68
Table 15 – AL-DelayMeasurement start service .69
Table 16 – AL-DelayMeasurement read service .70
Table 17 – PCS configuration service .70
Table 18 – MII read service .71
Table 19 – MII write service .71
Table 20 – AL-RTFN scan network read service .72
Table 21 – Application layer management service.72
Table 22 – Start synchronization service.73
Table 23 – Stop synchronization service .73
Table 24 – PTPNSU AREP class .75
Table 25 – PTMNSU AREP class.76
Table 26 – PTPNSC AREP class .76
Table 27 – PTPUTC AREP class.76
Table 28 – FAL services by AREP class .77
Table 29 – FAL services by AREP role .78
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 5-22: Application layer service definition –
Type 22 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
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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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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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
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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.
NOTE 1 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 particular data-link layer protocol Type to be used with physical layer and application layer protocols in
Type combinations as specified explicitly in the profile parts. Use of the various protocol Types in other
combinations may require permission of their respective intellectual-property-right holders.
International Standard IEC 61158-5-22 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This standard cancels and replaces IEC/PAS 61158-5-22 published in 2009. This first edition
constitutes a technical revision.
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61158-5-22 © IEC:2010(E) – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
65C/606/FDIS 65C/620/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This publication has been drafted in accordance with ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61158 series, published under the general title Industrial
communication networks – Fieldbus specifications, can be found on the IEC web site.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 2 The revision of this standard will be synchronized with the other parts of the IEC 61158 series.
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– 6 – 61158-5-22 © IEC:2010(E)
INTRODUCTION
This part of IEC 61158 is one of a series produced to facilitate the interconnection of
automation system components. It is related to other standards in the set as defined by the
“three-layer” fieldbus reference model described in IEC/TR 61158-1.
The application service is provided by the application protocol making use of the services
available from the data-link or other immediately lower layer. This standard defines the
application service characteristics that fieldbus applications and/or system management may
exploit.
Throughout the set of fieldbus standards, the term “service” refers to the abstract capability
provided by one layer of the OSI Basic Reference Model to the layer immediately above.
Thus, the application layer service defined in this standard is a conceptual architectural
service, independent of administrative and implementation divisions.
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61158-5-22 © IEC:2010(E) – 7 –
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 5-22: Application layer service definition –
Type 22 elements
1 Scope
1.1 Overview
The fieldbus application layer (FAL) provides user programs with a means to access the
fieldbus communication environment. In this respect, the FAL can be viewed as a “window
between corresponding application programs.”
This standard 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 22 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 standard defines in an abstract way the externally visible service provided by the fieldbus
application layer in terms of
a) an abstract model for defining application resources (objects) capable of being
manipulated by users via the use of the FAL service;
b) the primitive actions and events of the service;
c) the parameters associated with each primitive action and event, and the form which they
take; and
d) the interrelationship between these actions and events, and their valid sequences.
The purpose of this standard is to define the services provided to
a) the FAL user at the boundary between the user and the application layer of the fieldbus
reference model; and
b) Systems Management at the boundary between the application layer and Systems
Management of the fieldbus reference model.
This standard specifies the structure and services of the fieldbus application layer, in
conformance with the OSI Basic Reference Model (ISO/IEC 7498) and the OSI application
layer structure (ISO/IEC 9545).
FAL services and protocols are provided by FAL application-entities (AE) contained within the
application processes. The FAL AE is composed of a set of object-oriented application service
elements (ASEs) and a layer management entity (LME) that manages the AE. The ASEs
provide communication services that operate on a set of related application process object
(APO) classes. One of the FAL ASEs is a management ASE that provides a common set of
services for the management of the instances of FAL classes.
Although these services specify, from the perspective of applications, how request and
responses are issued and delivered, they do not include a specification of what the requesting
and responding applications are to do with them. That is, the behavioral aspects of the
applications are not specified; only a definition of what requests and responses they can
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– 8 – 61158-5-22 © IEC:2010(E)
send/receive is specified. This permits greater flexibility to the FAL users in standardizing
such object behavior. In addition to these services, some supporting services are also defined
in this standard to provide access to the FAL to control certain aspects of its operation.
1.2 Specifications
The principal objective of this standard is to specify the characteristics of conceptual
application layer services suitable for time-critical communications, and thus supplement the
OSI Basic Reference Model in guiding the development of application layer protocols for time-
critical communications.
A secondary objective is to provide migration paths from previously-existing industrial
communications protocols. It is this latter objective which gives rise to the diversity of services
standardized as the various Types of IEC 61158, and the corresponding protocols
standardized in subparts of IEC 61158-6.
This specification may be used as the basis for formal application programming interfaces.
Nevertheless, it is not a formal programming interface, and any such interface will need to
address implementation issues not covered by this specification, including:
a) the sizes and octet ordering of various multi-octet service parameters; and
b) the correlation of paired request and confirm, or indication and response, primitives.
1.3 Conformance
This standard does not specify individual implementations or products, nor does it constrain
the implementations of application layer entities within industrial automation systems.
There is no conformance of equipment to this application layer service definition standard.
Instead, conformance is achieved through implementation of conforming application layer
protocols that fulfill the application layer services as defined in this standard.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 60559, Binary floating-point arithmetic for microprocessor systems
IEC 61131-3, Programmable controllers – Part 3: Programming languages
1
IEC/TR 61158-1:2010 , Industrial communication networks – Fieldbus specifications – Part 1:
Overview and guidance for the IEC 61158 and IEC 61784 series
1
IEC 61158-4-22:2010 , Industrial communication networks – Fieldbus specifications –
Part 4-22: Data-link layer protocol specification – Type 22 elements
1
, Industrial communication networks – Fieldbus specifications – Part 6-
IEC 61158-6-22:2010
22: Application layer protocol specification – Type 22 elements
ISO/IEC 646, Information technology – ISO 7-bit coded character set for information
interchange
—————————
1
To be published.
---------------------- Page: 10 ----------------------
61158-5-22 © IEC:2010(E) – 9 –
ISO/IEC 7498-1, Information technology – Open Systems Interconnection – Basic Reference
Model: The Basic Model
ISO/IEC 8802-3, Information technology – Telecommunications and information exchange
between systems – Local and metropolitan area networks – Specific requirements – Part 3:
Carrier sense multiple access with collision detection (CSMA/CD) access method and
physical layer specifications
ISO/IEC 8822, Information Technology – Open Systems Interconnection – Presentation
service definition
ISO/IEC 8824-1, Information Technology – Abstract Syntax Notation One (ASN.1):
Specification of basic notation
ISO/IEC 9545, Information Technology – Open Systems Interconnection – Application Layer
structure
ISO/IEC 10646, Information technology – Universal Multiple-Octet Coded Character Set
(UCS)
ISO/IEC 10731, Information technology – Open Systems Interconnection – Basic Reference
Model – Conventions for the definition of OSI services
3 Terms, definitions, abbreviations, symbols and conventions
For the purposes of this document, the following terms as defined in these publications apply:
3.1 ISO/IEC 7498-1 terms
a) application entity
b) application process
c) application protocol data unit
d) application service element
e) application entity invocation
f) application process invocation
g) application transaction
h) real open system
i) transfer syntax
3.2 ISO/IEC 8822 terms
a) abstract syntax
b) presentation context
3.3 ISO/IEC 9545 terms
a) application-association
b) application-context
c) application context name
d) application-entity-invocation
e) application-entity-type
f) application-process-invocation
g) application-process-type
---------------------- Page: 11 ----------------------
– 10 – 61158-5-22 © IEC:2010(E)
h) application-service-element
i) application control service element
3.4 ISO/IEC 8824-1 terms
a) object identifier
b) type
3.5 Type 22 fieldbus application-layer specific definitions
3.5.1
application
function for which data is exchanged
3.5.2
application object
representation of a particular component within a device
3.5.3
acyclic data
data which is transferred from time to time for dedicated purposes
3.5.4
bit
unit of information consisting of a 1 or a 0. This is the smallest data unit that can be
transmitted
3.5.5
cell
synonym for a single DL-segment which uses RTFL communication model
3.5.6
channel
path provided for conveying data
3.5.7
client
object which uses the services of a server by initiating a message to perform a task
3.5.8
communication cycle
fixed time period between which the root device issues empty DLPDUs for cyclic
communication initiation in which data is transmitted utilizing CDC and MSC
3.5.9
connection
logical binding between two application objects
3.5.10
cycle time
duration of a communication cycle
3.5.11
cyclic
events which repeat in a regular and repetitive manner
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61158-5-22 © IEC:2010(E) – 11 –
3.5.12
cyclic communication
periodic exchange of telegrams
3.5.13
cyclic data
data which is transferred in a regular and repetitive manner for dedicated purposes
3.5.14
cyclic data channel
CDC
part of one or more DLPDUs, which is reserved for cyclic data
3.5.15
data
generic term used to refer to any information carried over a fieldbus
3.5.16
device
physical entity connected to the fieldbus
3.5.17
error
discrepancy between a computed, observed or measured value or condition and the specified
or theoretically correct value or condition
3.5.18
error code
identification number of a specific type of error
3.5.19
gateway
device acting as a linking element between different protocols
3.5.20
index
position of an object within the object dictionary
3.5.21
inter-cell communication
communication between a RTFL device and a RTFN device or communication between a
RTFL device and another RTFL device in different cells linked by RTFN
3.5.22
interface
shared boundary between two functional units, defined by functional characteristics, signal
characteristic, or other characteristics as appropriate
3.5.23
intra-cell communication
communication between a RTFL device and another RTFL device in the same cell
3.5.24
logical double line
sequence of root device and all ordinary devices processing the communication DLPDU in
forward and backward direction
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– 12 – 61158-5-22 © IEC:2010(E)
3.5.25
mapping parameters
set of values defining the correspondence between application objects and process data
objects
3.5.26
master clock
global time base for the PCS mechanism
3.5.27
message
ordered sequence of octets intended to convey data
3.5.28
message channel
MSC
part of one or more DLPDUs, which is reserved for acyclic data
3.5.29
network
set of devices connected by some type of communication medium, including any intervening
repeaters, bridges, routers and lower-layer gateways
3.5.30
ordinary device
OD
slave in the communication system, which utilizes RTFL for cyclic and acyclic data
interchange with other ODs in the same logical double line
3.5.31
precise clock synchronization
PCS
mechanism to synchronize clocks of RTFL devices and maintain a global time base
3.5.32
process data
data designated to be transferred cyclically or acyclically for the purpose of
...
IEC 61158-5-22
®
Edition 1.0 2010-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 5-22: Application layer service definition – Type 22 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 5-22: Définition des services de la couche application – Eléments
de Type 22
IEC 61158-5-22:2010
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2010 IEC, Geneva, Switzerland
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---------------------- Page: 2 ----------------------
IEC 61158-5-22
®
Edition 1.0 2010-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 5-22: Application layer service definition – Type 22 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 5-22: Définition des services de la couche application – Eléments
de Type 22
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XC
CODE PRIX
ICS 25.04.40; 35.100.70; 35.110 ISBN 978-2-88912-866-2
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – 61158-5-22 IEC:2010
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
1.1 Overview . 7
1.2 Specifications . 8
1.3 Conformance . 8
2 Normative references . 8
3 Terms, definitions, abbreviations, symbols and conventions . 9
3.1 ISO/IEC 7498-1 terms . 9
3.2 ISO/IEC 8822 terms . 9
3.3 ISO/IEC 9545 terms . 9
3.4 ISO/IEC 8824-1 terms . 10
3.5 Type 22 fieldbus application-layer specific definitions . 10
3.6 Abbreviations and symbols . 13
3.7 Conventions . 16
4 Concepts . 19
4.1 Common concepts . 19
4.2 Type specific concepts . 19
5 Data type ASE . 23
5.1 Overview . 23
5.2 Formal definition of data type objects . 23
5.3 FAL defined data types . 23
6 Communication model specification . 31
6.1 Application service elements (ASEs) . 31
6.2 Application relationships (ARs) . 74
Bibliography . 79
Figure 1 – Producer-consumer interaction model . 21
Figure 2 – RTFL device reference model . 22
Figure 3 – RTFN device reference model . 23
Figure 4 – Type 22 CeS device structure . 32
Figure 5 – Successful SDO expedited download sequence . 46
Figure 6 – Successful SDO normal download initialization sequence . 46
Figure 7 – Successful SDO download sequence . 46
Figure 8 – Successful SDO expedited upload sequence. 47
Figure 9 – Successful SDO normal upload initialization sequence . 47
Figure 10 – Successful SDO upload sequence . 47
Figure 11 – Failed SDO expedited download initialization sequence . 48
Figure 12 – Failed SDO download after initialization sequence . 48
Figure 13 – Failed SDO download sequence . 48
Figure 14 – Emergency sequence . 49
Figure 15 – Heartbeat sequence . 49
Figure 16 – Process data write sequence. 50
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61158-5-22 IEC:2010 – 3 –
Figure 17 – PDO mapping principle . 50
Figure 18 – Process data object . 51
Figure 19 – SEF service sequence. 64
Table 1 – Object dictionary structure . 32
Table 2 – Initiate SDO expedited download service . 54
Table 3 – Initiate SDO normal download service . 55
Table 4 – SDO download service . 56
Table 5 – Initiate SDO expedited upload service . 57
Table 6 – Initiate SDO normal upload service . 58
Table 7 – SDO upload service . 60
Table 8 – SDO abort service . 61
Table 9 – Process data write service. 62
Table 10 – Emergency service (EMCY) . 62
Table 11 – Heartbeat service . 63
Table 12 – Send frame service . 65
Table 13 – AL-Network verification service . 67
Table 14 – AL-RTFL configuration service . 68
Table 15 – AL-DelayMeasurement start service . 69
Table 16 – AL-DelayMeasurement read service . 70
Table 17 – PCS configuration service . 70
Table 18 – MII read service . 71
Table 19 – MII write service . 71
Table 20 – AL-RTFN scan network read service . 72
Table 21 – Application layer management service . 72
Table 22 – Start synchronization service . 73
Table 23 – Stop synchronization service . 73
Table 24 – PTPNSU AREP class . 75
Table 25 – PTMNSU AREP class . 76
Table 26 – PTPNSC AREP class . 76
Table 27 – PTPUTC AREP class. 76
Table 28 – FAL services by AREP class . 77
Table 29 – FAL services by AREP role . 78
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 5-22: Application layer service definition –
Type 22 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.
NOTE 1 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 particular data-link layer protocol Type to be used with physical layer and application layer protocols in
Type combinations as specified explicitly in the profile parts. Use of the various protocol Types in other
combinations may require permission of their respective intellectual-property-right holders.
International Standard IEC 61158-5-22 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This standard cancels and replaces IEC/PAS 61158-5-22 published in 2009. This first edition
constitutes a technical revision.
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61158-5-22 IEC:2010 – 5 –
This bilingual version published in 2012-01 corresponds to the English version published in
2010-08.
The text of this standard is based on the following documents:
FDIS Report on voting
65C/606/FDIS 65C/620/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
The French version has not been voted upon.
This publication has been drafted in accordance with ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61158 series, published under the general title Industrial
communication networks – Fieldbus specifications, can be found on the IEC web site.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 2 The revision of this standard will be synchronized with the other parts of the IEC 61158 series.
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– 6 – 61158-5-22 IEC:2010
INTRODUCTION
This part of IEC 61158 is one of a series produced to facilitate the interconnection of
automation system components. It is related to other standards in the set as defined by the
“three-layer” fieldbus reference model described in IEC/TR 61158-1.
The application service is provided by the application protocol making use of the services
available from the data-link or other immediately lower layer. This standard defines the
application service characteristics that fieldbus applications and/or system management may
exploit.
Throughout the set of fieldbus standards, the term “service” refers to the abstract capability
provided by one layer of the OSI Basic Reference Model to the layer immediately above.
Thus, the application layer service defined in this standard is a conceptual architectural
service, independent of administrative and implementation divisions.
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61158-5-22 IEC:2010 – 7 –
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 5-22: Application layer service definition –
Type 22 elements
1 Scope
1.1 Overview
The fieldbus application layer (FAL) provides user programs with a means to access the
fieldbus communication environment. In this respect, the FAL can be viewed as a “window
between corresponding application programs.”
This standard 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 22 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 standard defines in an abstract way the externally visible service provided by the fieldbus
application layer in terms of
a) an abstract model for defining application resources (objects) capable of being
manipulated by users via the use of the FAL service;
b) the primitive actions and events of the service;
c) the parameters associated with each primitive action and event, and the form which they
take; and
d) the interrelationship between these actions and events, and their valid sequences.
The purpose of this standard is to define the services provided to
a) the FAL user at the boundary between the user and the application layer of the fieldbus
reference model; and
b) Systems Management at the boundary between the application layer and Systems
Management of the fieldbus reference model.
This standard specifies the structure and services of the fieldbus application layer, in
conformance with the OSI Basic Reference Model (ISO/IEC 7498) and the OSI application
layer structure (ISO/IEC 9545).
FAL services and protocols are provided by FAL application-entities (AE) contained within the
application processes. The FAL AE is composed of a set of object-oriented application service
elements (ASEs) and a layer management entity (LME) that manages the AE. The ASEs
provide communication services that operate on a set of related application process object
(APO) classes. One of the FAL ASEs is a management ASE that provides a common set of
services for the management of the instances of FAL classes.
Although these services specify, from the perspective of applications, how request and
responses are issued and delivered, they do not include a specification of what the requesting
and responding applications are to do with them. That is, the behavioral aspects of the
applications are not specified; only a definition of what requests and responses they can
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– 8 – 61158-5-22 IEC:2010
send/receive is specified. This permits greater flexibility to the FAL users in standardizing
such object behavior. In addition to these services, some supporting services are also defined
in this standard to provide access to the FAL to control certain aspects of its operation.
1.2 Specifications
The principal objective of this standard is to specify the characteristics of conceptual
application layer services suitable for time-critical communications, and thus supplement the
OSI Basic Reference Model in guiding the development of application layer protocols for time-
critical communications.
A secondary objective is to provide migration paths from previously-existing industrial
communications protocols. It is this latter objective which gives rise to the diversity of services
standardized as the various Types of IEC 61158, and the corresponding protocols
standardized in subparts of IEC 61158-6.
This specification may be used as the basis for formal application programming interfaces.
Nevertheless, it is not a formal programming interface, and any such interface will need to
address implementation issues not covered by this specification, including:
a) the sizes and octet ordering of various multi-octet service parameters; and
b) the correlation of paired request and confirm, or indication and response, primitives.
1.3 Conformance
This standard does not specify individual implementations or products, nor does it constrain
the implementations of application layer entities within industrial automation systems.
There is no conformance of equipment to this application layer service definition standard.
Instead, conformance is achieved through implementation of conforming application layer
protocols that fulfill the application layer services as defined in this standard.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 60559, Binary floating-point arithmetic for microprocessor systems
IEC 61131-3, Programmable controllers – Part 3: Programming languages
1
IEC/TR 61158-1:2010 , Industrial communication networks – Fieldbus specifications – Part 1:
Overview and guidance for the IEC 61158 and IEC 61784 series
1
IEC 61158-4-22:2010 , Industrial communication networks – Fieldbus specifications –
Part 4-22: Data-link layer protocol specification – Type 22 elements
1
IEC 61158-6-22:2010 , Industrial communication networks – Fieldbus specifications – Part 6-
22: Application layer protocol specification – Type 22 elements
ISO/IEC 646, Information technology – ISO 7-bit coded character set for information
interchange
—————————
1
To be published.
---------------------- Page: 10 ----------------------
61158-5-22 IEC:2010 – 9 –
ISO/IEC 7498-1, Information technology – Open Systems Interconnection – Basic Reference
Model: The Basic Model
ISO/IEC 8802-3, Information technology – Telecommunications and information exchange
between systems – Local and metropolitan area networks – Specific requirements – Part 3:
Carrier sense multiple access with collision detection (CSMA/CD) access method and
physical layer specifications
ISO/IEC 8822, Information Technology – Open Systems Interconnection – Presentation
service definition
ISO/IEC 8824-1, Information Technology – Abstract Syntax Notation One (ASN.1):
Specification of basic notation
ISO/IEC 9545, Information Technology – Open Systems Interconnection – Application Layer
structure
ISO/IEC 10646, Information technology – Universal Multiple-Octet Coded Character Set
(UCS)
ISO/IEC 10731, Information technology – Open Systems Interconnection – Basic Reference
Model – Conventions for the definition of OSI services
3 Terms, definitions, abbreviations, symbols and conventions
For the purposes of this document, the following terms as defined in these publications apply:
3.1 ISO/IEC 7498-1 terms
a) application entity
b) application process
c) application protocol data unit
d) application service element
e) application entity invocation
f) application process invocation
g) application transaction
h) real open system
i) transfer syntax
3.2 ISO/IEC 8822 terms
a) abstract syntax
b) presentation context
3.3 ISO/IEC 9545 terms
a) application-association
b) application-context
c) application context name
d) application-entity-invocation
e) application-entity-type
f) application-process-invocation
g) application-process-type
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– 10 – 61158-5-22 IEC:2010
h) application-service-element
i) application control service element
3.4 ISO/IEC 8824-1 terms
a) object identifier
b) type
3.5 Type 22 fieldbus application-layer specific definitions
3.5.1
application
function for which data is exchanged
3.5.2
application object
representation of a particular component within a device
3.5.3
acyclic data
data which is transferred from time to time for dedicated purposes
3.5.4
bit
unit of information consisting of a 1 or a 0. This is the smallest data unit that can be
transmitted
3.5.5
cell
sy
...
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