SIST EN 61987-12:2016

Industrial-process measurement and control - Data structures and elements in process equipment catalogues - Part 12: Lists of Properties (LOP) for Flow Measuring Equipment for electronic data exchange (IEC 61987-12:2016)

IEC 61987-12:2016 provides an operating list of properties (OLOP) for the description of the operating parameters and the collection of requirements for a flow measuring equipment and device lists of properties (DLOP) for the description of a number of flow measuring equipment types.

Industrielle Leittechnik - Datenstrukturen und -elemente in Katalogen der Prozessleittechnik - Teil 12: Merkmalleisten (ML) für Durchflussmessgeräte für den elektronischen Datenaustausch (IEC 61987-12:2016)

Mesure et commande dans les processus industriels - Structures et éléments de donnees dans les catalogues d'équipement de processus -- Partie 12: Listes de propriétés (LDP) pour les équipements de mesure de débit pour l'échange (IEC 61987-12:2016)

L'IEC 61987-12:2016 décrit une liste de propriétés fonctionnelles (LDPF) pour la description des paramètres fonctionnels et l'ensemble des exigences pour les équipements de mesure de débit, et une liste de propriétés d'appareils (LDPA) pour la description de différents types d'équipements de mesure de débit.

Merjenje in nadzor industrijskega procesa - Strukture podatkov in elementi v katalogih procesne opreme - 12. del: Seznam lastnosti opreme za merjenje pretoka za elektronsko izmenjavo podatkov (IEC 61987-12:2016)

Ta del standarda IEC 61987 zajema
• operativni seznam lastnosti (OLOP) za opis operativnih parametrov in zbirko zahtev glede opreme za merjenje pretoka ter
• sezname lastnosti naprav (DLOP) za opis več vrst opreme za merjenje pretoka.
Strukture operativnega seznama lastnosti in seznamov lastnosti naprav ustrezajo splošnim strukturam, opredeljenim v standardu IEC 61987-11, in so skladne s seznami lastnosti, opredeljenimi v standardu IEC 61987-10.
Vidiki, ki niso povezani z operativnim seznamom lastnosti in so potrebni pri različnih procesih izmenjave podatkov, opisanih v standardu IEC 61987-10, bodo objavljeni v standardu IEC 61987-921.
Knjižnice lastnosti in blokov, ki se uporabljajo v seznamih lastnosti v tem standardu, so podane v dodatkih C in D.

General Information

• Status: Published
• Publication Date: 16-Aug-2016
• ICS: 01.110 - Technical product documentation
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.240.50 - IT applications in industry
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 21-Jun-2016
• Due Date: 26-Aug-2016
• Completion Date: 17-Aug-2016
• Ref Project: EN 61987-12:2016 - Industrial- Process Measurement and Control - Data Structures and Elements in Process Equipment Catalogues - Part 12: Lists of properties (LOPs) for flow measuring equipment for electronic data exchange

Overview

EN 61987-12:2016 (IEC 61987-12:2016) defines standardized Lists of Properties (LOPs) for flow measuring equipment to support consistent electronic data exchange in industrial-process measurement and control. The standard provides an Operating List of Properties (OLOP) to describe operating parameters and a set of Device Lists of Properties (DLOPs) that cover typical flow measuring device types. Its intent is to harmonize product descriptions used in process equipment catalogues, e‑catalogues, engineering and procurement systems.

Key Topics

• OLOP and DLOP structures: standardized property sets for describing operating parameters and device-specific attributes for flow meters and transmitters.
• Data structures and elements: rules and formats for cataloguing properties to enable automated processing by IT and control systems.
• Polymorphic areas and block concept: methodology for representing variable device structures (e.g., blocks such as “Input” and “Output”) and marking polymorphic sections to support multiple device variants.
• Property library and block library: normative annexes providing reusable property definitions and block definitions to ensure consistent semantics across implementations.
• Device coverage: DLOPs in Annex B include common flow measuring equipment types such as Coriolis, thermal mass, orifice/differential-pressure, variable-area, turbine, electromagnetic (including insertion types), ultrasonic, vortex, positive-displacement, gear, helix, piston, and remote/separate transmitters.
• Normative references: integration with related data element standards (e.g., IEC 61360 series) and earlier parts of IEC 61987 (Parts 10 and 11).

Applications

• Manufacturers: publish consistent, machine-readable product data for e‑catalogues and product lifecycle management (PLM).
• System integrators and engineering firms: import standardized device data into CAD/CAE, control system configuration, and instrument lists to reduce manual entry and errors.
• Procurement and asset owners: automate specification matching, quoting and ordering processes across suppliers.
• Software vendors: implement catalogue exchange, ERP/PLM integrations, or device-configuration tools that rely on unambiguous property definitions.

Practical benefits include improved interoperability, reduced duplication of device information, streamlined engineering workflows, and reliable electronic exchange of flow meter specifications.

Related Standards

• IEC 61987-10 (Fundamentals)
• IEC 61987-11 (Generic structures)
• IEC 61360 series (standard data element types and classification)

Keywords: EN 61987-12:2016, IEC 61987-12, Lists of Properties, OLOP, DLOP, flow measuring equipment, electronic data exchange, process equipment catalogues, data structures.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2016
Merjenje in nadzor industrijskega procesa - Strukture podatkov in elementi v
katalogih procesne opreme - 12. del: Seznam lastnosti opreme za merjenje pretoka
za elektronsko izmenjavo podatkov (IEC 61987-12:2016)
Industrial-process measurement and control - Data structures and elements in process
equipment catalogues - Part 12: Lists of Properties (LOP) for Flow Measuring Equipment
for electronic data exchange (IEC 61987-12:2016)
Industrielle Leittechnik - Datenstrukturen und -elemente in Katalogen der
Prozessleittechnik - Teil 12: Merkmalleisten (ML) für Durchflussmessgeräte für den
elektronischen Datenaustausch (IEC 61987-12:2016)
Mesure et commande dans les processus industriels - Structures et éléments de
donnees dans les catalogues d'équipement de processus -- Partie 12: Listes de
propriétés (LDP) pour les équipements de mesure de débit pour l'échange (IEC 61987-
12:2016)
Ta slovenski standard je istoveten z: EN 61987-12:2016
ICS:
01.110 7HKQLþQDGRNXPHQWDFLMD]D Technical product
L]GHONH documentation
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 61987-12

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2016
ICS 25.040.40; 35.100.20
English Version
Industrial- Process Measurement and Control - Data Structures
and Elements in Process Equipment Catalogues - Part 12: Lists
of properties (LOPs) for flow measuring equipment for electronic
data exchange
(IEC 61987-12:2016)
Mesure et commande dans les processus industriels - Industrielle Leittechnik - Datenstrukturen und -elemente in
Éléments et structures de données dans les catalogues Katalogen der Prozessleittechnik - Teil 12: Merkmalleisten
d'équipements de processus - Partie 12: Listes de (ML) für Durchflussmessgeräte für den elektronischen
propriétés (LDP) pour les équipements de mesure de débit Datenaustausch
pour l'échange électronique de données (IEC 61987-12:2016)
(IEC 61987-12:2016)
This European Standard was approved by CENELEC on 2016-04-27. 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.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61987-12:2016 E
European foreword
The text of document 65E/490/FDIS, future edition 1 of IEC 61987-12, 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 EN
61987-12:2016.
The following dates are fixed:
• latest date by which the document has to be (dop) 2017-01-27
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2019-04-27
• 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 61987-12:2016 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60079-0:2011 NOTE Harmonized as EN 60079-0:2012.
IEC 60947-5-6:1999 NOTE Harmonized as EN 60947-5-6:2000.
IEC 61298-1:2008 NOTE Harmonized as EN 61298-1:2008.
IEC 61298-2:2008 NOTE Harmonized as EN 61298-2:2008.
IEC 61298-3:2008 NOTE Harmonized as EN 61298-3:2008.
IEC 61360-1 NOTE Harmonized as EN 61360-1.
IEC 61360-2 NOTE Harmonized as EN 61360-2.
IEC 61360-5 NOTE Harmonized as EN 61360-5.
IEC 61784-1:2003 NOTE Harmonized as EN 61784-1:2004.
IEC 61987-1 NOTE Harmonized as EN 61987-1.
ISO 5167-2:2003 NOTE Harmonized as EN ISO 5167-2:2003.

EN 61804-5:2016
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 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61360 series Standard data elements types with EN 61360 series
associated classification scheme for
electric items - Part 1: Definitions -
Principles and methods
IEC 61987-10 2009 Industrial-process measurement and EN 61987-10 2009
control - Data structures and elements in
process equipment catalogues - Part 10:
Lists of Properties (LOPs) for Industrial-
Process Measurement and Control for
Electronic Data Exchange - Fundamentals
- -  + AC 2011
IEC 61987-11 2012 Industrial-process measurement and EN 61987-11 2012
control - Data structures and elements in
process equipment catalogues -- Part 11:
List of Properties (LOP) of measuring
equipment for electronic data exchange -
Generic structures
IEC 61987-12 ®
Edition 1.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process measurement and control – Data structures and elements

in process equipment catalogues –

Part 12: Lists of properties (LOPs) for flow measuring equipment for electronic

data exchange
Mesure et commande dans les processus industriels – Éléments et structures

de données dans les catalogues d'équipements de processus –

Partie 12: Listes de propriétés (LDP) pour les équipements de mesure de débit

pour l'échange électronique de données

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.20 ISBN 978-2-8322-3200-2

– 2 – IEC 61987-12:2016  IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 6
4 General . 7
4.1 Overview. 7
4.2 Depiction of OLOPs and DLOPs . 7
4.2.1 General . 7
4.2.2 Structural roles . 7
4.2.3 Marking of polymorphic areas . 8
4.3 Examples of DLOP block usage . 11
4.3.1 Block “Input” . 11
4.3.2 Block “Output” . 13
Annex A (normative) Operating list of properties for flow measuring equipment . 17
Annex B (normative) Device lists of properties for flow measuring equipment . 18
B.1 Flow transmitter . 18
B.2 Coriolis mass flow transmitter . 18
B.3 Thermal mass flow transmitter . 18
B.4 Orifice/differential pressure flow transmitter . 18
B.5 Variable area flow transmitter/gauge . 19
B.6 (Oval) gear flow transmitter/gauge . 19
B.7 Helix flow transmitter/gauge . 19
B.8 Piston flow transmitter/gauge . 19
B.9 Electromagnetic flow transmitter . 20
B.10 Electromagnetic insertion flow transmitter . 20
B.11 Turbine/propeller/Woltmann flow transmitter/gauge . 20
B.12 Swirl flow transmitter . 20
B.13 Ultrasonic flow transmitter . 21
B.14 Vortex flow transmitter . 21
B.15 Positive displacement flow transmitter/gauge . 21
B.16 Remote/separate transmitter . 21
Annex C (normative) Property library . 22
Annex D (normative) Block library for considered device types . 23
Bibliography . 24

Figure 1 – Structure of a polymorphic area . 8

Table 1 – Example of structure of polymorphic areas . 10
Table 2 – Example for the “Input” block . 11
Table 3 – Example for the “Output” block . 13

IEC 61987-12:2016  IEC 2016 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL –
DATA STRUCTURES AND ELEMENTS
IN PROCESS EQUIPMENT CATALOGUES –

Part 12: Lists of properties (LOPs) for flow measuring
equipment for electronic data exchange

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 61987-12 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/490/FDIS 65E/494/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.

– 4 – IEC 61987-12:2016  IEC 2016
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61987 series, published under the general title Industrial-process
measurement and control – Data structures and elements in process equipment catalogues,
can be found on the IEC website.
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.
IEC 61987-12:2016  IEC 2016 – 5 –
INTRODUCTION
The exchange of product data between companies, business systems, engineering tools, data
systems within companies and, in the future, control systems (electrical, measuring and
control technology) can run smoothly only when both the information to be exchanged and the
use of this information has been clearly defined.
Prior to this standard, requirements on process control devices and systems were specified by
customers in various ways when suppliers or manufacturers were asked to quote for suitable
equipment. The suppliers in their turn described the devices according to their own
documentation schemes, often using different terms, structures and media (paper, databases,
CDs, e-catalogues, etc.). The situation was similar in the planning and development process,
with device information frequently being duplicated in a number of different information
technology (IT) systems.
Any method that is capable of recording all existing information only once during the planning
and ordering process and making it available for further processing, gives all parties involved
an opportunity to concentrate on the essentials. A precondition for this is the standardization
of both the descriptions of the objects and the exchange of information.
This standard series proposes a method for standardization which will help both suppliers and
users of measuring equipment to optimize workflows both within their own companies and in
their exchanges with other companies. Depending on their role in the process, engineering
firms may be considered here to be either users or suppliers.
The method specifies measuring equipment by means of blocks of properties. These blocks
are compiled into lists of properties (LOPs), each of which describes a specific equipment
(device) type. This standard series covers both properties that may be used in an inquiry or a
proposal and detailed properties required for integration of the equipment in computer
systems for other tasks.
IEC 61987-10 defines structure elements for constructing lists of properties for electrical and
process control equipment in order to facilitate automatic data exchange between any two
computer systems in any possible workflow, for example engineering, maintenance or
purchasing workflow and to allow both the customers and the suppliers of the equipment to
optimize their processes and workflows. IEC 61987-10 also provides the data model for
assembling the LOPs.
IEC 61987-11 specifies the generic structure for operating and device lists of properties
(OLOPs and DLOPs). It lays down the framework for further parts of IEC 61987 in which
complete LOPs for device types measuring a given physical quantity and using a particular
measuring principle will be specified. The generic structure may also serve as a basis for the
specification of LOPs for other industrial-process control instrument types such as control
valves and signal processing equipment.
IEC 61987-12 concerns flow measuring equipment. It provides one operating LOP for all types
of flow transmitter which can be used, for example, as a request for various sorts of quotation.
The DLOPs provided in this standard for a range of flow transmitter types can be used in very
different ways: in the computer systems of equipment manufacturers and suppliers; in CAE
and similar systems of EPC contractors and other engineering companies; and especially in
the various plant maintenance systems used by plant owners. The OLOP and the DLOPs
provided correspond to the guidelines specified in IEC 61987-10 and IEC 61987-11.

– 6 – IEC 61987-12:2016  IEC 2016
INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL –
DATA STRUCTURES AND ELEMENTS
IN PROCESS EQUIPMENT CATALOGUES –

Part 12: Lists of properties (LOPs) for flow measuring
equipment for electronic data exchange

1 Scope
This part of IEC 61987 provides an
• operating list of properties (OLOP) for the description of the operating parameters and the
collection of requirements for a flow measuring equipment and
• device lists of properties (DLOP) for the description of a number of flow measuring
equipment types.
The structures of the OLOP and the DLOP correspond to the general structures defined in
IEC 61987-11 and agree with the fundamentals for the construction of LOPs defined in
IEC 61987-10.
Aspects other than the OLOP, needed in different electronic data exchange processes
described in IEC 61987-10, will be published in IEC 61987-92 .
Libraries of properties and of blocks used in the LOPs in this standard are listed in Annex C
and Annex D.
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 61360 (all parts), Standard data elements types with associated classification scheme for
electric components
IEC 61987-10:2009, Industrial-process measurement and control – Data structures and
elements in process equipment catalogues – Part 10: List of Properties (LOPs) for Industrial-
Process Measurement and Control for Electronic Data Exchange – Fundamentals
IEC 61987-11:2012, Industrial-process measurement and control – Data structures and
elements in process equipment catalogues – Part 11: Lists of Properties (LOP) of measuring
equipment for electronic data exchange – Generic structures
3 Terms and definitions
For the purpose of this document, the terms and definitions given in IEC 61987-10 and
IEC 61987-11 apply.
_______________
Under consideration
IEC 61987-12:2016  IEC 2016 – 7 –
4 General
4.1 Overview
The LOPs provided by this document are intended for use in electronic data exchange
processes performed between any two computer systems. The computer systems can both
belong to the same company or they can belong to different companies as described in Annex
C of IEC 61987-10:2009.
The OLOP for the family of flow measuring equipment is to be found in Annex A while the
DLOPs of the individual flow device types are to be found in Annex B.
Structural elements such as LOP type, block and property defined in this standard are
available in electronic form in the “Automation equipment” domain of the IEC Common Data
Dictionary (CDD).
4.2 Depiction of OLOPs and DLOPs
4.2.1 General
The properties of the OLOPs and DLOPs used in this part of IEC 61987 have been created in
conformance to the requirements of the IEC 61360 series. As such, the structural elements,
properties and attributes to be found in the IEC Common Data Dictionary are normative.
4.2.2 Structural roles
The entities within a list of properties can have one of a number of structural roles.
a) Property
A property exists as a property only.
b) Ref. property + Block
A reference property connects a block to the superordinate block or LOP in which it is
embedded.
Properties and sub-blocks listed below a block name and placed one position to the right
are elements of the block. A block ends when another block name appears in the same
column as the block name or in any other column to its left.
The reference property has the same preferred name as the block to which it refers. All
attributes of these properties are available in the IEC Common Data Dictionary (CDD).
c) Cardinality property
A cardinality property is connected to the block which immediately follows it. The value of
the property (0 … n) in a transaction file determines the number of times the associated
block shall be repeated. It is identified by the identifier in the column “Property identifier”.
The preferred name of a cardinality property is “Number of “, where is
derived from name of the block with which it is associated.
In the transaction file (see examples in 4.3), it can be seen that a block has been repeated
twice:
– the cardinality property directly before the block has a value greater than 1,
– the name of the repeated block is extended by “_” followed by the repetition number.
Example:
If the block “Signal function” is repeated 3 times, the following construction occurs in the transaction file:
“number of signal function” has the value “3” - cardinality property
“Signal function_1” - first repeated block
…
“Signal function_2” - second repeated block
…
– 8 – IEC 61987-12:2016  IEC 2016
“Signal function_3” - third repeated block
…
d) Ref. property + Block
This role is similar to b) but the block concerned can be repeated according to value of the
cardinality property which precedes it.
e) Polymorphic control property
A polymorphic control property provides the means of introducing complete blocks of
properties describing different realizations of a particular device function, for instance
inputs and outputs. The property has a value list containing the designations of the blocks
that may be introduced. When in a transaction file a polymorphic control property is
assigned a value, the corresponding block follows (see examples in Tables 2 and 3).
A polymorphic control property is identified in the IEC Common Data Dictionary by the
identifier in the column “Property identifier”. The preferred name of a polymorphic property
is “<
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