SIST EN 61499-2:2013
(Main)Function blocks - Part 2: Software requirements (IEC 61499-2:2012)
Function blocks - Part 2: Software requirements (IEC 61499-2:2012)
This part of IEC 61499 defines requirements for software tools to support the following systems engineering tasks enumerated in IEC 61499-1:
– the specification of function block types;
– the functional specification of resource types and device types;
– the specification, analysis, and validation of distributed IPMCSs;
– the configuration, implementation, operation, and maintenance of distributed IPMCSs;
– the exchange of information among software tools.
It is assumed that such software tools may be used in the context of an Engineering Support System (ESS) as described in IEC 61499-1. It is beyond the scope of this standard to specify the entire life cycle of industrial-process measurement and control systems (IPMCSs), or the entire set of tasks and activities required to support an IPCMS over its life cycle. However, other standards which do specify such tasks and activities may extend or modify the requirements specified in this part of IEC 61499.
Verteilte Funktionsbausteine für die Automatisierungstechnik - Teil 2: Anforderungen an die Software-Werkzeuge (IEC 61499-2:2012)
Blocs fonctionnels - Partie 2: Exigences pour les outils logiciels (IEC 61499-2:2012)
La CEI 61499-2:2012 définit les exigences pour les outils logiciels pour prendre en charge les tâches d'ingénierie système suivantes qui sont données dans la CEI 61499-1: - la spécification de types de bloc fonctionnel; - la spécification fonctionnelle de types de ressource et de types d'équipement; - la spécification, l'analyse et la validation des systèmes IPMCS distribués; - la configuration, la mise en oeuvre, l'exploitation et la maintenance des systèmes IPMCS distribués; - l'échange d'informations parmi les outils logiciels. Cette deuxième édition annule et remplace la première édition parue en 2005 et elle inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: Le contenu de l'Annexe A a été mis à jour pour être en conformité avec les modifications techniques apportées à la deuxième édition de la CEI 61499-1. Les sections CDATA sont désormais autorisées pour les contenus textuels des algorithmes des Tableaux A.4 et A.5.
Funkcijski bloki - 2. del: Zahteve za programska orodja (IEC 61499-2:2012)
naslednjih opravil sistemskega inženiringa, naštetih v standardu IEC 61499-1:
– specifikacijo vrst funkcijskih blokov;
– funkcijsko specifikacijo vrst virov in naprav;
– specifikacijo, analizo in ovrednotenje razširjenih sistemov merjenja in krmiljenja industrijskih postopkov;
– konfiguracijo, izvedbo, delovanje in vzdrževanje razširjenih sistemov merjenja in krmiljenja industrijskih postopkov;
– izmenjavo podatkov med programskimi orodji.
Predpostavlja se, da se lahko taka programska orodja uporabijo v okviru Inženirskih podpornih sistemov (ESS), kot je opisano v standardu IEC 61499-1. Na področje uporabe tega standarda ne sodi navajanje celotnega življenjskega cikla sistemov merjenja in krmiljenja industrijskih postopkov ali celoten nabor opravil in aktivnosti, ki so potrebne za podporo sistemom merjenja in krmiljenja industrijskih postopkov čez njihov življenjski cikel. Vendar pa lahko drugi standardi, ki navajajo taka opravila in aktivnosti, razširijo ali prilagodijo zahteve, ki so navedene v tem delu standarda IEC 61499.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61499-2:2013
01-april-2013
1DGRPHãþD
SIST EN 61499-2:2006
Funkcijski bloki - 2. del: Zahteve za programska orodja (IEC 61499-2:2012)
Function blocks - Part 2: Software requirements (IEC 61499-2:2012)
Verteilte Funktionsbausteine für die Automatisierungstechnik - Teil 2: Anforderungen an
die Software-Werkzeuge (IEC 61499-2:2012)
Blocs fonctionnels - Partie 2: Exigences pour les outils logiciels (IEC 61499-2:2012)
Ta slovenski standard je istoveten z: EN 61499-2:2013
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.080 Dokumentiranje razvoja Software development and
programske opreme in system documentation
sistemov (sistemska
dokumentacija)
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
SIST EN 61499-2:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 61499-2:2013
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SIST EN 61499-2:2013
EUROPEAN STANDARD
EN 61499-2
NORME EUROPÉENNE
February 2013
EUROPÄISCHE NORM
ICS 25.040; 35.240.50 Supersedes EN 61499-2:2005
English version
Function blocks -
Part 2: Software tool requirements
(IEC 61499-2:2012)
Blocs fonctionnels - Funktionsbausteine für industrielle
Partie 2: Exigences pour les outils Leitsysteme -
logiciels Teil 2: Anforderungen an Software-
(CEI 61499-2:2012) Werkzeuge
(IEC 61499-2:2012)
This European Standard was approved by CENELEC on 2012-12-12. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61499-2:2013 E
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SIST EN 61499-2:2013
EN 61499-2:2013 - 2 -
Foreword
The text of document 65B/846/FDIS, future edition 2 of IEC 61499-2, prepared by IEC/TC 65B
"Measurement and control devices" of IEC/TC 65 "Industrial-process measurement, control and
automation" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 61499-2:2013.
The following dates are fixed:
• latest date by which the document has (dop) 2013-09-12
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-12-12
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61499-2:2005.
EN 61499-2:2013 includes the following significant technical changes with respect to
EN 61499-2:2005:
- the contents of Annex A have been updated to conform to the technical changes of the second
edition of EN 61499-1;
- CDATA sections are now allowed for the textual contents of algorithms in Tables A.4 and A.5.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 61499-2:2012 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated :
IEC 61499-4 NOTE Harmonised as EN 61499-4.
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SIST EN 61499-2:2013
- 3 - EN 61499-2:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 61131-3 2003 Programmable controllers - EN 61131-3 2003
Part 3: Programming languages
IEC 61499-1 2012 Function blocks - EN 61499-1 2013
Part 1: Architecture
ISO/IEC 8824 Series Information technology - Abstract Syntax - -
Notation One (ASN.1)
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SIST EN 61499-2:2013
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SIST EN 61499-2:2013
IEC 61499-2
®
Edition 2.0 2012-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Function blocks –
Part 2: Software tool requirements
Blocs fonctionnels –
Partie 2: Exigences pour les outils logiciels
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 25.040; 35.240.50 ISBN 978-2-83220-478-8
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
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SIST EN 61499-2:2013
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CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Software tool requirements . 7
4.1 Information to be provided by the software tool supplier . 7
4.2 Exchange of library elements . 7
4.3 Information to be provided by the supplier of library elements . 7
4.4 Display of declarations . 7
4.5 Modification of declarations . 8
4.6 Validation of declarations . 8
4.7 Implementation of declarations . 8
4.8 System operation, testing and maintenance . 8
Annex A (normative) Document type definitions (DTDs) . 9
Annex B (informative) Graphics model . 26
Annex C (informative) Examples . 29
Bibliography . 47
Figure B.1 – Graphics model . 26
Figure B.2 – ECC drawing example . 28
Table A.1 – Document type definition (DTD) elements . 9
Table A.2 – DataType DTD (1 of 2) . 10
Table A.3 – DataType DTD elements (1 of 2) . 12
Table A.4 – Library Element DTD (1 of 5) . 15
Table A.5 – LibraryElement DTD elements (1 of 5) . 20
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FUNCTION BLOCKS –
Part 2: Software tool requirements
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.
International Standard IEC 61499-2, has been prepared by subcommittee 65B: Measurement
and control devices, of IEC technical committee 65: Industrial-process measurement, control
and automation.
This second edition cancels and replaces the first edition published in 2005. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• The contents of Annex A have been updated to conform to the technical changes of the
second edition of IEC 61499-1.
• CDATA sections are now allowed for the textual contents of algorithms in Tables A.4 and
A.5.
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The text of this standard is based on the following documents:
FDIS Report on voting
65B/846/FDIS 65B/856/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61499 series can be found, under the general title Function
blocks, on the IEC website.
Terms used throughout this International Standard that have been defined in Clause 3 of
IEC 61499-1:2012 and in this International Standard appear in italics.
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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication
indicates that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
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SIST EN 61499-2:2013
61499-2 © IEC:2012 – 5 –
INTRODUCTION
IEC 61499 consists of the following parts, under the general title Function blocks:
• Part 1: Architecture
• Part 2: Software tool requirements
• Part 3: Tutorial information (withdrawn)
• Part 4: Rules for compliance profiles
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FUNCTION BLOCKS –
Part 2: Software tool requirements
1 Scope
This part of IEC 61499 defines requirements for software tools to support the following
systems engineering tasks enumerated in IEC 61499-1:
– the specification of function block types;
– the functional specification of resource types and device types;
– the specification, analysis, and validation of distributed IPMCSs;
– the configuration, implementation, operation, and maintenance of distributed IPMCSs;
– the exchange of information among software tools.
It is assumed that such software tools may be used in the context of an Engineering Support
System (ESS) as described in IEC 61499-1.
It is beyond the scope of this standard to specify the entire life cycle of industrial-process
measurement and control systems (IPMCSs), or the entire set of tasks and activities required
to support an IPCMS over its life cycle. However, other standards which do specify such tasks
and activities may extend or modify the requirements specified in this part of IEC 61499.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61131-3:2003, Programmable controllers – Part 3: Programming languages
IEC 61499-1:2012, Function blocks – Part 1: Architecture
ISO/IEC 8824 (all parts), Information technology – Abstract Syntax Notation One (ASN.1)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61499-1, as well as
the following apply.
3.1
library element
collection of declarations applying to a data type, function block type, adapter type,
subapplication type, resource type, device type, segment type, or system configuration
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4 Software tool requirements
4.1 Information to be provided by the software tool supplier
This Clause defines the functional requirements of software tools that support the
performance of the systems engineering tasks enumerated in Clause 1.
The supplier of a software tool shall specify the following information in addition to other
information required in this Clause:
• the type or types of library element to which the software tool applies;
• the engineering task or tasks supported by the software tool. Task descriptions may be
taken from the enumeration of engineering tasks given in Clause 1, or may be defined by
the supplier.
4.2 Exchange of library elements
A software tool shall be capable of exchanging its library elements with other software tools.
This exchange shall take the form of data in the format defined in Annex A, written on
physical media or exchanged over communication links or networks.
4.3 Information to be provided by the supplier of library elements
NOTE The provisions of this subclause are intended to provide the means by which the provider of a library
element may achieve protection of intellectual property while still providing sufficient information to permit the
effective use of the library element.
The provider of a library element may elect to provide an implementation of the library
element.
EXAMPLE 1 The provider of a function block type library element may provide an implementation of the function
block type as:
• one or more instances of the function block type in a resource contained in a device of Class 0 or higher
as described in IEC 61499-4;
• an instantiable implementation of the function block type in a resource contained in a device of Class 1 or
higher as described in IEC 61499-4;
• a file in an implementation-dependent format suitable for installation in a resource contained in a device
of Class 2 as described in IEC 61499-4, for instance using the XML syntax defined in Annex D.
When an implementation of a library element is provided, the provider is not required to
provide full details of the implementation. However, the provider shall provide sufficient
information to enable the user to fully determine the functionality of the provided library
element.
EXAMPLE 2 The requirement of the above paragraph would be met by the provider of an instance of a function
block type in a resource through the provision, at a minimum, of the following information:
• a function block type library element specifying its event interfaces, data interfaces and services as
defined in IEC 61499-1;
• resource type and device type library elements showing the occurrence and connections of the function
block instances.
4.4 Display of declarations
A software tool shall be capable of displaying the declarations of its associated library
elements in a form appropriate to the engineering task. This display may utilize the graphical
or textual formats defined in IEC 61499-1, or a format defined by the supplier of the software
tool.
NOTE The declarations of a library element may define its interfaces (event and data inputs and outputs) and
internal variables as well as its algorithms and the control of their execution, for example via an execution control
chart (ECC), etc.
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Software tools may provide additional features, beyond those illustrated in IEC 61499-1, in
the graphic display of declarations.
EXAMPLE 1 In the display of an Execution Control Chart (ECC), the tool may provide, along with the display of
each transition, a cardinal number indicating the order (as defined in IEC 61499-1) in which the transition is
evaluated.
EXAMPLE 2 A software tool may provide means of navigating a mapping from the display of a function block
instance in an application to its corresponding display in a resource, and vice versa.
4.5 Modification of declarations
A software tool shall enable its user to modify the declarations of its associated library
elements as appropriate to the engineering task. Such modifications may include adding,
deleting or changing the contents of declarations, and may be performed either graphically or
textually or both.
EXAMPLE The software tool may provide convenient means for the user to change the order in which
declarations are listed in their textual representation, for instance in a list of transitions in an Execution Control
Chart (ECC), without the user having to edit the textual representation by manual means such as "cut and paste".
4.6 Validation of declarations
If required by the associated engineering task, a software tool shall provide facilities for
validation of the declarations of its associated library elements. Such facilities may include,
but are not limited to:
• Checking the correctness of the syntax of declarations.
• Checking the semantic correctness of declarations, for instance, checking whether all
function block instances in an application and its associated subapplications are
properly allocated to resources, interconnected within resources, and
intercommunicating among resources in a system configuration.
• Simulation and testing of the operation of an instance of a library element type, either
by itself or in association with other instances of the same or different types.
4.7 Implementation of declarations
If required by the associated engineering task, a software tool shall provide facilities for the
implementation of the declarations of its associated library elements. Such facilities may
include, but are not limited to:
• the production of an executable code ("firmware") for embedding in instances of
resource types and device types;
• the creation and interconnection ("downloading") of function block instances in
resources and devices, for instance by using the management facilities defined in
subclause 6.3 and Annexes F and G of IEC 61499-1.
4.8 System operation, testing and maintenance
If required by the associated engineering task, a software tool shall provide facilities for the
operation, testing and maintenance of an Industrial Process Measurement and Control
System (IPMCS) specified by its associated library elements. Such facilities may include, but
are not limited to:
• the facilities described in preceding subclauses of this Clause;
• the information exchange facilities defined in IEC 61499-1.
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Annex A
(normative)
Document type definitions (DTDs)
A.1 General principles
This Annex presents Document Type Definitions (DTDs) for the exchange of IEC 61499 library
elements between software tools. These DTDs are defined in the syntax defined in the
eXtensible Markup Language (XML) specification at www.w3.org/TR/2000/REC-xml-20001006.
The correspondences between the DTD elements given in this annex, the library elements
defined in IEC 61499-1, C.2.1, and the textual syntax given in IEC 61499-1, Annex B are
given in Table A.1.
Table A.1 – Document type definition (DTD) elements
DTD element LibraryElement Textual syntax
data_type_declaration
DataType
DataTypeDeclaration
(IEC 61131-3, B.1.3)
FBType FBTypeDeclaration fb_type_declaration
SubapplicationType SubapplicationTypeDeclaration subapplication_type_declaration
AdapterType AdapterTypeDeclaration adapter_type_declaration
ResourceType ResourceTypeDeclaration resource_type_specification
DeviceType device_type_specification
DeviceTypeDeclaration
System system_configuration
SystemConfiguration
The first table of each subclause of this Annex contains the DTD for the corresponding library
element. The second table of each subclause provides a reference to the textual syntax (if
any) plus an explanation for the major elements and attributes in the DTD. Following this,
examples are given of the resulting XML files for typical library elements.
NOTE 1 If there is a conflict between the provisions of this Annex and the provisions of Annex B of IEC 61499-1,
the provisions of the latter prevail.
NOTE 2 The examples given in this Annex provide a representative, but not exhaustive, sample of the features of
the associated DTDs. In particular, these examples are not intended to be used as a test suite for compliance to
the provisions of this standard.
A.2 DataType DTD
An XML document complying with the DTD in Table A.2 represents a DataTypeDeclaration
object as described in C.2.2 of IEC 61499-1.
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Table A.2 – DataType DTD (1 of 2)
ASN1Tag?, (DirectlyDerivedType | EnumeratedType | SubrangeType |
ArrayType | StructuredType))>
Name CDATA #REQUIRED
Comment CDATA #IMPLIED>
Standard CDATA #IMPLIED
Classification CDATA #IMPLIED
ApplicationDomain CDATA #IMPLIED
Function CDATA #IMPLIED
Type CDATA #IMPLIED
Description CDATA #IMPLIED>
Organization CDATA #REQUIRED
Version CDATA #REQUIRED
Author CDATA #REQUIRED
Date CDATA #REQUIRED
Remarks CDATA #IMPLIED>
Class (UNIVERSAL | APPLICATION | CONTEXT | PRIVATE) #IMPLIED
Number CDATA #REQUIRED>
header CDATA #IMPLIED
classdef CDATA #IMPLIED>
Language (Java | Cpp | C | Other) #REQUIRED
Vendor CDATA #REQUIRED
Product CDATA #REQUIRED
Version CDATA #REQUIRED>
BaseType (BOOL | SINT | INT | DINT | LINT | USINT | UINT | UDINT
| ULINT | REAL | LREAL | TIME | DATE | TIME_OF_DAY | TOD
| DATE_AND_TIME | DT | STRING | BYTE |WORD | DWORD |LWORD |
WSTRING) #REQUIRED
InitialValue CDATA #IMPLIED
Comment CDATA #IMPLIED>
InitialValue CDATA #IMPLIED
Comment CDATA #IMPLIED>
Name CDATA #REQUIRED
Comment CDATA #IMPLIED>
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Table A.2 (2 of 2)
BaseType (SINT|INT|DINT|LINT|USINT|UINT|UDINT|ULINT) #REQUIRED
InitialValue CDATA #IMPLIED
Comment CDATA #IMPLIED>
LowerLimit CDATA #REQUIRED
UpperLimit CDATA #REQUIRED>
BaseType CDATA #REQUIRED
InitialValues CDATA #IMPLIED
Comment CDATA #IMPLIED>
Comment CDATA #IMPLIED>
Name CDATA #REQUIRED
Type CDATA #REQUIRED
ArraySize CDATA #IMPLIED
InitialValue CDATA #IMPLIED
Comment CDATA #IMPLIED>
Name CDATA #REQUIRED
Type (SINT|INT|DINT|LINT|USINT|UINT|UDINT|ULINT) #REQUIRED
InitialValue CDATA #IMPLIED
Comment CDATA #IMPLIED>
Explanations of the elements of the above DTD, and (where applicable) references to the
formal syntax for their attributes, are given in Table A.3.
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Table A.3 – DataType DTD elements (1 of 2)
Element Textual syntax Explanation
attributes (IEC 61131-3, Annex B)
DataType
See IEC 61131-3
Name data_type_name
Comment --
A comment per IEC 61131-3 without (* and *) delimiters
Identification
Information for data base retrieval
Standard
Primary reference standard in number-part-subclause format
Classificatio
...
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