Industrial systems, installations and equipment and industrial products, designation of signals - Part 1: Basic rules (IEC 61175-1:2015)

This part of IEC 61175 provides rules for the composition of designations for the identification
of signals and signal connections. This includes the designation of power supply.
This part of IEC 61175 is applicable to all types of signals within an industrial system,
installation and equipment and industrial products. It deals with the information aspect of
signals and not with their physical implementation.
Excluded from the scope are general rules for the presentation of information in human
machine interfaces. This part of IEC 61175 is also not applicable for the identification of
wiring, terminals, piping and other hardware connections.
NOTE For the purpose of marking of wires, see IEC 62491.
This horizontal standard is primarily intended for use by technical committees in the
preparation of standards in accordance with the principles laid down in IEC Guide 108.
One of the responsibilities of a technical committee is, wherever applicable, to make use of
horizontal standards in the preparation of its publications. The contents of this horizontal
standard will not apply unless specifically referred to or included in the relevant publications.

Industrielle Systeme, Anlagen und Ausrüstungen und Industrieprodukte, Kennzeichnung von Signalen - Teil 1: Allgemeine Regeln (IEC 61175-1:2015)

Systèmes industriels, installations et appareils, et produits industriels, Désignations des signaux - Partie 1: Règles de base (IEC 61175-1:2015)

L'IEC 61175-1:2015 établit des règles pour la composition des désignations pour l'identification des signaux et des connexions de signaux. Elle intègre la désignation de l'alimentation électrique. Elle est applicable à tous les types de signaux au sein d'un système, d'une installation et d'un appareil, et de produits industriels. Elle traite l'aspect information des signaux et non leur mise en uvre physique. Cette première édition annule et remplace la deuxième édition de l'IEC 61175 parue en 2005 et constitue une révision technique. Cette édition inclut les modifications suivantes: une description améliorée des principes d'utilisation et une séparation stricte entre l'aspect physique d'un signal et les informations associées relatives à ce dernier. Elle a le statut d'une norme horizontale conformément au Guide 108 de l'IEC.

Industrijski sistemi, inštalacije in oprema ter industrijski proizvodi, oznake signalov - 1. del: Osnovna pravila (IEC 61175-1:2015)

Ta del standarda IEC 61175 določa pravila za sestavo oznak za identifikacijo signalov in signalnih povezav. To vključuje oznako za napajanje. Ta del standarda IEC 61175 se uporablja za vse vrste signalov v industrijskih sistemih, inštalacijah in opremi ter industrijskih proizvodih. V njem je obravnavan informacijski vidik signalov in ne njihovo fizično izvajanje.
S področja uporabe standarda so izključena splošna pravila za predstavitev informacij pri vmesnikih človek-stroj. Ta del standarda IEC 61175 se prav tako ne uporablja za identifikacijo napeljave, terminalov, ocevja in drugih povezav strojne opreme.
OPOMBA: Za namen označevanja žic glejte standard IEC 62491. Ta horizontalni standard je namenjen predvsem tehničnim odborom za pripravo standardov v skladu z načeli vodila IEC Guide 108. Ena od pristojnosti tehničnih odborov je, da med pripravo publikacij uporabljajo horizontalne standarde, kadar je to primerno. Vsebina tega horizontalnega standarda se ne uporablja, razen če je izrecno navedena ali zajeta v ustreznih publikacijah.

General Information

Status
Published
Publication Date
11-Oct-2015
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Sep-2015
Due Date
12-Nov-2015
Completion Date
12-Oct-2015

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SLOVENSKI STANDARD
SIST EN 61175-1:2015
01-november-2015
Industrijski sistemi, inštalacije in oprema ter industrijski proizvodi, oznake
signalov - 1. del: Osnovna pravila (IEC 61175-1:2015)

Industrial systems, installations and equipment and industrial products, designation of

signals - Part 1: Basic rules (IEC 61175-1:2015)

Industrielle Systeme, Anlagen und Ausrüstungen und Industrieprodukte, Kennzeichnung

von Signalen - Teil 1: Allgemeine Regeln (IEC 61175-1:2015)

Systèmes industriels, installations et appareils, et produits industriels, Désignations des

signaux - Partie 1: Règles de base (IEC 61175-1:2015)
Ta slovenski standard je istoveten z: EN 61175-1:2015
ICS:
29.020 Elektrotehnika na splošno Electrical engineering in
general
SIST EN 61175-1:2015 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 61175-1:2015
---------------------- Page: 2 ----------------------
SIST EN 61175-1:2015
EUROPEAN STANDARD EN 61175-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2015
ICS 29.020 Supersedes EN 61175:2005
English Version
Industrial systems, installations and equipment and industrial
products - Designation of signals - Part 1: Basic rules
(IEC 61175-1:2015)

Systèmes, installations, appareils et produits industriels - Industrielle Systeme, Anlagen und Ausrüstungen und

Désignation des signaux - Partie 1: Règles de base Industrieprodukte, Kennzeichnung von Signalen -

(IEC 61175-1:2015) Teil 1: Allgemeine Regeln
(IEC 61175-1:2015)

This European Standard was approved by CENELEC on 2015-06-25. 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

© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 61175-1:2015 E
---------------------- Page: 3 ----------------------
SIST EN 61175-1:2015
EN 61175-1:2015
European foreword

The text of document 3/1214A/FDIS, future edition 1 of IEC 61175-1, prepared by IEC/TC 3

"Information structures and elements, identification and marking principles, documentation and

graphical symbols" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as

EN 61175-1:2015.
The following dates are fixed:
• latest date by which the document has to be implemented at (dop) 2016-03-25
national level by publication of an identical national
standard or by endorsement
(dow) 2018-06-25
• latest date by which the national standards conflicting with
the document have to be withdrawn
This document supersedes EN 61175:2005.

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 61175-1:2015 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 60027 NOTE Harmonized in EN 60027 series.
IEC 60445 NOTE Harmonized as EN 60445.
IEC 60447 NOTE Harmonized as EN 60447.
IEC 60747 NOTE Harmonized in EN 60747 series.
IEC 61131 NOTE Harmonized in EN 61131 series.
IEC 61355-1 NOTE Harmonized as EN 61355-1.
IEC 61360-1 NOTE Harmonized as EN 61360-1.
IEC 61666 NOTE Harmonized as EN 61666.
IEC 61850 NOTE Harmonized in EN 61850 series.
IEC 62491 NOTE Harmonized as EN 62491.
---------------------- Page: 4 ----------------------
SIST EN 61175-1:2015
EN 61175-1:2015
IEC 62744 NOTE Harmonized as EN 62744.
IEC 81346-2 NOTE Harmonized as EN 81346-2.
IEC 80000 NOTE Harmonized in EN 80000 series.
ISO 21549-7:2007 NOTE Harmonized as EN ISO 21549-7:2007 (not modified).
ISO 80000 NOTE Harmonized in EN ISO 80000 series.
---------------------- Page: 5 ----------------------
SIST EN 61175-1:2015
EN 61175-1:2015
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 61082-1 - Preparation of documents used in EN 61082-1 -
electrotechnology -
Part 1: Rules
IEC 81346-1 - Industrial systems, installations and EN 81346-1 -
equipment and industrial products -
Structuring principles and reference
designations -
Part 1: Basic rules
IEC/TS 62720 - Identification of units of measurement for - -
computer-based processing
---------------------- Page: 6 ----------------------
SIST EN 61175-1:2015
IEC 61175-1
Edition 1.0 2015-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
HORIZONTAL STANDARD
NORME HORIZONTALE
Industrial systems, installations and equipment and industrial products –
Designation of signals –
Part 1: Basic rules
Systèmes, installations, appareils et produits industriels –
Désignation des signaux –
Partie 1: Règles de base
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.020 ISBN 978-2-8322-2677-3

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: 7 ----------------------
SIST EN 61175-1:2015
– 2 – IEC 61175-1:2015 © IEC 2015
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 8

4 Basic principles ............................................................................................................. 11

4.1 General principles on signal transfer and signal naming ........................................ 11

4.2 Signal classification .............................................................................................. 12

4.3 Signal name domain ............................................................................................. 13

5 Designation of signals ................................................................................................... 14

5.1 Structure of the signal designation ........................................................................ 14

5.1.1 General ......................................................................................................... 14

5.1.2 Object designation ......................................................................................... 15

5.1.3 Prefix ............................................................................................................. 15

5.1.4 Signal name .................................................................................................. 16

5.1.5 Signal connection identifier ............................................................................ 19

5.1.6 Signal connection characteristics ................................................................... 19

5.2 Recommended characters .................................................................................... 19

5.3 Forming signal designations .................................................................................. 20

5.3.1 Reporting signals ........................................................................................... 20

5.3.2 Controlling signals ......................................................................................... 25

6 Identification of signals in the signal connection network ............................................... 26

6.1 General ................................................................................................................. 26

6.2 Pre-defined signal names ..................................................................................... 27

6.3 Grouping of signals ............................................................................................... 28

6.3.1 General ......................................................................................................... 28

6.3.2 Packaging of signals in signal carrying medium ............................................. 28

6.3.3 Grouping of signals for presentation .............................................................. 29

7 Signal identification in interfaces for data exchange ...................................................... 29

7.1 General ................................................................................................................. 29

7.2 Interface between electric circuit and programmable devices, I/O ......................... 29

7.3 Interface for logic communication .......................................................................... 29

8 Signal presentation ........................................................................................................ 29

8.1 Representation vs. presentation of a signal designation ........................................ 29

8.2 Human machine interface, HMI ............................................................................. 30

8.3 Presentation in documentation .............................................................................. 30

8.4 Presentation of metadata for signals ..................................................................... 31

Annex A (normative) Letter codes for use in signal names ................................................... 33

A.1 Letter codes for variables ...................................................................................... 33

A.2 Letter codes used as modifiers ............................................................................. 34

A.3 Identification of certain designated conductors ...................................................... 34

Annex B (informative) Binary logic representation ................................................................ 35

B.1 General ................................................................................................................. 35

B.2 Negated signal ...................................................................................................... 35

Annex C (informative) Examples for signal lists including signal connection identifiers ......... 37

---------------------- Page: 8 ----------------------
SIST EN 61175-1:2015
IEC 61175-1:2015 © IEC 2015 – 3 –

C.1 Presentation of voltage measurement signal, class M ........................................... 37

C.2 Presentation of a controlling signal, class C .......................................................... 39

Annex D (informative) Generic communication needs in a process....................................... 40

D.1 Process model ...................................................................................................... 40

D.2 Signal connection and signal presentation media .................................................. 40

D.2.1 General ......................................................................................................... 40

D.2.2 Wiring ............................................................................................................ 41

D.2.3 Internal bus ................................................................................................... 41

D.2.4 External bus .................................................................................................. 41

D.2.5 Presentation in the human interface, HMI ...................................................... 41

D.2.6 Other human presentation ............................................................................. 41

D.3 Applicability of signal designations ........................................................................ 42

D.3.1 In electrical system ........................................................................................ 42

D.3.2 In control devices (with internal numerical communication) ............................ 42

D.3.3 In external communication ............................................................................. 42

D.3.4 In the HMI ...................................................................................................... 42

Annex E (informative) Restructuring of information for communication purposes .................. 43

E.1 General ................................................................................................................. 43

E.2 Data objects .......................................................................................................... 43

E.2.1 Packing of data .............................................................................................. 43

E.2.2 Object designation and address structure ...................................................... 43

E.2.3 Information content (Information object) ......................................................... 44

E.2.4 Descriptive parameters .................................................................................. 44

Annex F (normative) Data element type definitions .............................................................. 46

F.1 General ................................................................................................................. 46

F.2 Source definitions of DETs and classes of DETs in this part of IEC 61175 ............ 46

F.2.1 Definitions of classes of DETs ....................................................................... 46

F.2.2 Definition of DETs associated with class AAF525 .......................................... 47

F.2.3 Definition of DETs associated with class AAF526 .......................................... 47

Bibliography .......................................................................................................................... 48

Figure 1 – Illustration of relationship of terminology ................................................................ 7

Figure 2 – Signal with source and destination(s) ................................................................... 11

Figure 3 – Information object transmitted via different signal carrying and connection

media ................................................................................................................................... 11

Figure 4 – Different signals caused by processing/logical linking .......................................... 12

Figure 5 – Relation between controlling and reporting signals ............................................... 13

Figure 6 – Object serving as signal name domain ................................................................. 14

Figure 7 – Signal designation and signal connection identification ........................................ 15

Figure 8 – Signal name structure .......................................................................................... 16

Figure 9 – Examples of reporting type of signals ................................................................... 21

Figure 10 – Example of an indication signal .......................................................................... 22

Figure 11 – Example of an event signal ................................................................................ 22

Figure 12 – Example of measuring signals ............................................................................ 23

Figure 13 – Example of an analogue measuring signal transmitted in different forms ........... 23

Figure 14 – Example of signal connection characteristics related to measuring signals ........ 24

Figure 15 – Example of power supply designation ................................................................. 24

---------------------- Page: 9 ----------------------
SIST EN 61175-1:2015
– 4 – IEC 61175-1:2015 © IEC 2015

Figure 16 – Examples of typical controlling type of signals .................................................... 25

Figure 17 – Example of a command signal ............................................................................ 26

Figure 18 – Example of a signal for setting value .................................................................. 26

Figure 19 – Signal connection identifiers in a single connection network ............................... 27

Figure 20 – Example of signal connection identifiers in a current measuring circuit ............... 27

Figure 21 – Signal connection identifiers by internal signal name .......................................... 28

Figure 22 – Use of concatenated reference designations in a plant ....................................... 31

Figure 23 – Metadata representing a signal and corresponding XML file ............................... 32

Figure B.1 – Signal states of binary signals .......................................................................... 35

Figure B.2 – Example of a negated signal ............................................................................. 36

Figure C.1 – Voltage measurement, reporting signal class M ................................................ 38

Figure C.2 – Command signal for a disconnector, controlling signal class C ......................... 39

Figure D.1 – Communication model based on IEC 81346-2 ................................................... 40

Figure E.1 – Communication of the signal information as attribute to a data object ............... 43

Table 1 – Letter codes for signal classes .............................................................................. 17

Table 2 – Examples of short names ...................................................................................... 17

Table 3 – Examples of basic signal names ............................................................................ 18

Table A.1 – Letter codes for variables based on International Standard 80000,

Quantities and units .............................................................................................................. 33

Table A.2 – Letter codes used as modifiers .......................................................................... 34

Table A.3 – Identification of certain designated conductors ................................................... 34

Table E.1 – Data attribute examples ..................................................................................... 45

---------------------- Page: 10 ----------------------
SIST EN 61175-1:2015
IEC 61175-1:2015 © IEC 2015 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL SYSTEMS, INSTALLATIONS AND
EQUIPMENT AND INDUSTRIAL PRODUCTS –
DESIGNATION OF SIGNALS –
Part 1: Basic rules
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 61175-1 has been prepared by IEC technical committee 3:

Information structures and elements, identification and marking principles, documentation and

graphical symbols.
It has the status of a horizontal standard in accordance with IEC Guide 108.

This first edition cancels and replaces the second edition of IEC 61175 published in 2005.

This edition constitutes a technical revision.

Further parts of IEC 61175 may be added as Technical Specifications relating to different

domains. Additional parts may be application guides for designation of signals in specific

applications such as communication protocols and other software systems.
---------------------- Page: 11 ----------------------
SIST EN 61175-1:2015
– 6 – IEC 61175-1:2015 © IEC 2015

This edition includes the following significant technical changes with respect to

IEC 61175:2005:
– an improved description of the principles for use; and

– a strict separation between the physical aspect of a signal and its associated information,

focusing on the latter.
The text of this standard is based on the following documents:
FDIS Report on voting
3/1214A/FDIS 3/1221/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 in the IEC 61175 series, published under the general title Industrial systems,

installations and equipment and industrial products – Designation of signals, 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 website 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.
---------------------- Page: 12 ----------------------
SIST EN 61175-1:2015
IEC 61175-1:2015 © IEC 2015 – 7 –
INTRODUCTION

The intention of this part of IEC 61175 is to establish rules and requirements for the

designation of signals, and furthermore to make recommendations on useful presentations of

these.

Basically, a signal designation is associated with the signal over its whole lifetime, which

means from the beginning of the design stage until the signal is no longer needed.

The change of medium for the transfer of a signal because of a physical rebuilding of an

installation will not cause a change of the identification of this signal if its semantic meaning is

maintained. Signals represent information. For communication purposes the information has

to be represented as data. The information can be more or less complex. In simple cases, the

information can be represented as a single Boolean variable, without internal structure. In

more complex cases, like in computer communication via data networks, the information can

be packaged in more complex objects, with internal structure, which are transferred with

suitable protocols. The implementation can be done in different ways depending on which

technology, protocol, etc. is being used. Figure 1 illustrates the terminology.
Concept model
formally
Knowledge (concepts in the “Reality” of
described by
an individual)
communicated as
Information object Information Information model
describes
assembled formally
Metadata object (unit of structured (communicatable (concepts as communicated
to described by
information) knowledge) in a given context)
represented as represented as
Data model
describes
Data object (unit of assembled Data formally
Metadata (information as represented
structured data) to (symbols with meaning) described by
in a given implementation)
for transfer represented as
assembled to
describes
Symbol
Signal metadata Signal
(e.g. characters)
is transferred by
Signal carrying medium
(e.g. light)
is transported by
Signal connection medium
(e.g. fibre)
IEC
Figure 1 – Illustration of relationship of terminology

The principles described in this part of IEC 61175 are closely related to other International

Standards such as IEC 81346-1, IEC 81346-2, IEC 61666 and IEC 81714-3. An information

model for the interrelations is provided in IEC TS 62771.
---------------------- Page: 13 ----------------------
SIST EN 61175-1:2015
– 8 – IEC 61175-1:2015 © IEC 2015
INDUSTRIAL SYSTEMS, INSTALLATIONS AND
EQUIPMENT AND INDUSTRIAL PRODUCTS –
DESIGNATION OF SIGNALS –
Part 1: Basic rules
1 Scope

This part of IEC 61175 provides rules for the composition of designations for the identification

of signals and signal connections. This includes the designation of power supply.

This part of IEC 61175 is applicable to all types of signals within an industrial system,

installation and equipment and industrial products. It deals with the information aspect of

signals and not with their physical implementation.

Excluded from the scope are general rules for the presentation of information in human

machine interfaces. This part
...

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