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Programmable controllersPart 3: Programming languages

BS EN 61131-3:2013

This is a preview of "BS EN 61131-3:2013". Click here to purchase the full version from the ANSI store.

National foreword

This British Standard is the UK implementation of EN 61131-3:2013. It isidentical to IEC 61131-3:2013. It supersedes BS EN 61131-3:2003, which will be withdrawn on 27 March 2016.

The UK participation in its preparation was entrusted by Technical CommitteeGEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements ofsystems.

A list of organizations represented on this committee can be obtained onrequest to its secretary.

This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.

© The British Standards Institution 2013.

Published by BSI Standards Limited 2013

ISBN 978 0 580 76605 3

ICS 25.040.40; 35.060; 35.240.50

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2013.

Amendments issued since publication

Date Text affected

BRITISH STANDARDBS EN 61131-3:2013

This is a preview of "BS EN 61131-3:2013". Click here to purchase the full version from the ANSI store.

EUROPEAN STANDARD EN 61131-3 NORME EUROPÉENNE

EUROPÄISCHE NORM May 2013

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 61131-3:2013 E

ICS 25.040; 35.240.50 Supersedes EN 61131-3:2003

English version

Programmable controllers - Part 3: Programming languages

(IEC 61131-3:2013) Automates programmables - Partie 3: Langages de programmation (CEI 61131-3:2013)

Speicherprogrammierbare Steuerungen - Teil 3: Programmiersprachen (IEC 61131-3:2013)

This European Standard was approved by CENELEC on 2013-03-27. 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.

BS EN 61131-3:2013

This is a preview of "BS EN 61131-3:2013". Click here to purchase the full version from the ANSI store.

EN 61131-3:2013 - 2 -

Foreword

The text of document 65B/858/FDIS, future edition 3 of IEC 61131-3, prepared by IEC TC 65 "Industrial-process measurement, control and automation" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61131-3:2013.

The following dates are fixed:

• latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement

(dop) 2013-12-27

• latest date by which the national standards conflicting with the document have to be withdrawn

(dow) 2016-03-27

This document supersedes EN 61131-3:2003.

EN 61131-3:2013 includes the following significant technical changes with respect to EN 61131-3:2003:

EN 61131-3:2013 is a compatible extension of EN 61131-3:2003. The main extensions are new data types and conversion functions, references, name spaces and the object oriented features of classes abd function blocks. See Annex B.

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 61131-3:2013 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 60848 NOTE Harmonised as EN 60848.

IEC 61499 series NOTE Harmonised in EN 61499 series.

BS EN 61131-3:2013

This is a preview of "BS EN 61131-3:2013". Click here to purchase the full version from the ANSI store.

- 3 - EN 61131-3:2013

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 61131-1 - Programmable controllers - Part 1: General information

EN 61131-1 -

IEC 61131-5 - Programmable controllers - Part 5: Communications

EN 61131-5 -

ISO/IEC 10646 2012 Information technology - Universal Coded Character Set (UCS)

- -

ISO/IEC/IEEE 60559 - Information technology - Microprocessor Systems - Floating-Point arithmetic

- -

BS EN 61131-3:2013

This is a preview of "BS EN 61131-3:2013". Click here to purchase the full version from the ANSI store.

– 2 – 61131-3 © IEC:2013

CONTENTS

1 Scope ............................................................................................................................... 9 2 Normative references ....................................................................................................... 9 3 Terms and definitions ....................................................................................................... 9 4 Architectural models ....................................................................................................... 18

4.1 Software model ..................................................................................................... 18 4.2 Communication model ........................................................................................... 19 4.3 Programming model .............................................................................................. 20

5 Compliance .................................................................................................................... 22 5.1 General ................................................................................................................. 22 5.2 Feature tables ....................................................................................................... 22 5.3 Implementer’s compliance statement ..................................................................... 22

6 Common elements .......................................................................................................... 24 6.1 Use of printed characters ...................................................................................... 24

6.1.1 Character set ............................................................................................. 24 6.1.2 Identifiers .................................................................................................. 24 6.1.3 Keywords .................................................................................................. 24 6.1.4 Use of white space .................................................................................... 25 6.1.5 Comments ................................................................................................. 25

6.2 Pragma ................................................................................................................. 26 6.3 Literals – External representation of data .............................................................. 26

6.3.1 General ..................................................................................................... 26 6.3.2 Numeric literals and string literals .............................................................. 26 6.3.3 Character string literals ............................................................................. 28 6.3.4 Duration literal ........................................................................................... 29 6.3.5 Date and time of day literal ........................................................................ 30

6.4 Data types ............................................................................................................. 30 6.4.1 General ..................................................................................................... 30 6.4.2 Elementary data types (BOOL, INT, REAL, STRING, etc.) ........................... 30 6.4.3 Generic data types .................................................................................... 33 6.4.4 User-defined data types ............................................................................. 34

6.5 Variables ............................................................................................................... 47 6.5.1 Declaration and initialization of variables ................................................... 47 6.5.2 Variable sections ....................................................................................... 49 6.5.3 Variable length ARRAY variables ................................................................ 51 6.5.4 Constant variables ..................................................................................... 53 6.5.5 Directly represented variables ( % ) ........................................................... 54 6.5.6 Retentive variables (RETAIN, NON_RETAIN) .............................................. 56

6.6 Program organization units (POUs) ....................................................................... 58 6.6.1 Common features for POUs ....................................................................... 58 6.6.2 Functions................................................................................................... 70 6.6.3 Function blocks ......................................................................................... 99 6.6.4 Programs ................................................................................................. 117 6.6.5 Classes ................................................................................................... 118

BS EN 61131-3:2013

This is a preview of "BS EN 61131-3:2013". Click here to purchase the full version from the ANSI store.