EN 62541-8:2011
(Main)OPC unified architecture - Part 8: Data Access
OPC unified architecture - Part 8: Data Access
IEC 62541-8:2011 is part of the overall OPC Unified Architecture (OPC UA) standard series and defines the information model associated with Data Access (DA). It particularly includes additional VariableTypes and complemental descriptions of the NodeClasses and Attributes needed for Data Access, additional Properties and other information and behaviour.
OPC Unified Architecture - Teil 8: Zugriff auf Automatisierungsdaten
Architecture unifiée OPC - Partie 8: Accès aux données
La CEI 62541-8:2011 fait partie intégrante de la série de normes générales sur l'Architecture Unifiée OPC (OPC UA). Elle définit le modèle d'information associé à l'Accès aux Données (DA). Elle comporte notamment des Types de Variable supplémentaires et des descriptions complémentaires des Classes de Noeuds et des Attributs nécessaires pour l'Accès aux Données, des Propriétés supplémentaires ainsi que d'autres paramètres relatifs aux informations et au comportement.
Poenotena arhitektura OPC - 8. del: Dostop do podatkov (IEC 62541-8:2011)
Ta del standarda IEC 62541 je del celotne skupine standardov za poenoteno arhitekturo OPC (OPC UA) in določa informacijski model, povezan z dostopom do podatkov (DA). Vključuje zlasti dodatne vrste spremenljivk in dopolnilne opise razredov vozlišč ter atribute za dostop do podatkov, dodatne lastnosti,druge informacije in vedenje.
Celoten model naslovnega prostora je vključno z vsemi razredi vozlišč in atributi naveden v standardu IEC 62541-3. Opravila za zaznavanje podatkov in dostop do njih so določena v standardu IEC 62541-4.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2012
Poenotena arhitektura OPC - 8. del: Dostop do podatkov (IEC 62541-8:2011)
OPC unified architecture - Part 8: Data access (IEC 62541-8:2011)
OPC Unified Architecture - Teil 8: Zugriff auf Automatisierungsdaten (IEC 62541-8:2011)
Architecture unifiée OPC - Partie 8: Accès aux données (CEI 62541-8:2011)
Ta slovenski standard je istoveten z: EN 62541-8:2011
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 62541-8
NORME EUROPÉENNE
December 2011
EUROPÄISCHE NORM
ICS 25.040.40; 25.100.01
English version
OPC unified architecture -
Part 8: Data Access
(IEC 62541-8:2011)
Architecture unifiée OPC - OPC Unified Architecture -
Partie 8: Accès aux données Teil 8: Zugriff auf Automatisierungsdaten
(CEI 62541-8:2011) (IEC 62541-8:2011)
This European Standard was approved by CENELEC on 2011-11-22. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland 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
© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62541-8:2011 E
Foreword
The text of document 65E/194/FDIS, future edition 1 of IEC 62541-8, prepared by SC 65E, "Devices and
integration in enterprise systems", of IEC/TC 65, "Industrial-process measurement, control and
automation" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2012-08-22
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2014-11-22
• latest date by which the national
standards conflicting with the
document have to be withdrawn
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 62541-8:2011 was approved by CENELEC as a European
Standard without any modification.
- 3 - EN 62541-8:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
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/TR 62541-1 - OPC unified architecture - CLC/TR 62541-1 -
Part 1: Overview and concepts
IEC 62541-3 - OPC unified architecture - EN 62541-3 -
Part 3: Address space model
IEC 62541-4 - OPC unified architecture - EN 62541-4 -
Part 4: Services
IEC 62541-5 - OPC unified architecture - EN 62541-5 -
Part 5: Information Model
IEC 62541-8 ®
Edition 1.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
OPC unified architecture –
Part 8: Data Access
Architecture unifiée OPC –
Partie 8: Accès aux données
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX Q
ICS 25.040.40; 25.100.01 ISBN 978-2-88912-727-6
– 2 – 62541-8 © IEC:2011
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 7
4 Concepts . 7
5 Model . 8
5.1 General . 8
5.2 Variable Types . 9
5.2.1 DataItemType . 9
5.2.2 AnalogItemType . 10
5.2.3 DiscreteItemType . 11
5.3 AddressSpace Model . 12
5.4 Attributes of DataItems . 13
5.5 Property DataTypes. 14
5.5.1 Overview . 14
5.5.2 Range . 14
5.5.3 EUInformation . 14
6 Data Access specific usage of Services . 15
6.1 General . 15
6.2 PercentDeadband . 15
6.3 Data Access Status Codes . 15
6.3.1 Overview . 15
6.3.2 Operation level result codes . 15
6.3.3 LimitBits . 17
6.3.4 SemanticsChanged . 17
Figure 1 – OPC DataItems are linked to automation data . 8
Figure 2 – DataItem VariableType Hierarchy . 9
Figure 3 – Representation of DataItems in the AddressSpace . 13
Table 1 – DataItemType Definition . 9
Table 2 – AnalogItemType Definition . 10
Table 3 – DiscreteItemType Definition . 11
Table 4 – TwoStateDiscreteType Definition . 11
Table 5 – MultiStateDiscreteType Definition . 12
Table 6 – Range Data Type Structure . 14
Table 7 – Range Definition. 14
Table 8 – EUInformation Data Type Structure . 14
Table 9 – EUInformation Definition . 15
Table 10 – Operation level result codes for BAD data quality . 16
Table 11 – Operation level result codes for UNCERTAIN data quality . 16
Table 12 – Operation level result codes for GOOD data quality . 17
62541-8 © IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPC UNIFIED ARCHITECTURE –
Part 8: Data Access
FOREWORD
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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.
International Standard IEC 62541-8 has been prepared by subcommittee 65E: Devices and
integration in enterprise systems, of IEC technical committee 65: Industrial-process
measurement, control and automation.
The text of this standard is based on the following documents:
FDIS Report on voting
65E/194/FDIS 65E/216/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.
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