IEC_TR_61131-4-2004.pdf

TECHNICAL REPORT IEC TR 61131-4 Second edition2004-07 Programmable controllers Part 4:User guidelines Reference number IEC/TR 61131-4:2004(E)Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editions The IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2.Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating to this publication,including its validity,is available in the IEC Catalogue of publications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication,as well as the list of publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publications The on-line catalogue on the IEC web site(www.iec.ch/searchpub)enables you to search by a variety of criteria including text searches,technical committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also available by email.Please contact the Customer Service Centre(see below)for further information.Customer Service Centre If you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-TECHNICAL REPORT IECTR 61131-4 Second edition2004-07 Programmable controllers Part 4:User guidelines PRICE CODE IEC 2004 Copyright-all rights reserved No part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch XF For price,see current catalogueCommission Electrotechnique InternationaleInternational Electrotechnical Commission Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-2 TR 61131-4 IEC:2004(E)CONTENTS FOREWORD.5 INTRODUCTION.7 1 General.8 1.1 Scope and object.8 1.2 Normative references.9 1.3 Use of this report.9 2 Terms and definitions.10 3 General recommendations for installation.11 3.1 Environmental conditions.11 3.2 Field wiring.11 3.3 Electromagnetic compatibility.12 3.4 User system markings.13 4 PLC in functional safety applications.13 4.1 Functional safety and safety-related-system concept.13 4.2 Using a PLC in a safety-related application.15 4.3 Requirements on PLCs in a safety-related system.16 4.4 Integration of PLC into a safety-related system.16 Annex A(informative)Overview of normative parts of IEC 61131.19 A.1 Overview of IEC 61131-1.19 A.2 Overview of IEC 61131-2.26 A.3 Overview of IEC 61131-3.59 A.4(blank).88 A.5 Overview of IEC 61131-5.88 A.6(blank).100 A.7 Overview of IEC61131-7.100 A.8(blank).107 Annex B(informative)Conformity to IEC 61131 and product certification.108 B.1 General.108 B.2 Conformity to standards.108 B.3 Declaration of conformity and certification.109 B.4 The inter-relation of standards to laws in European Community.109 B.5 CE-marking of PLCs in the European Union.111 B.6 Transition periods.113 B.7 Other juristictions.114 B.8 Reference documents.115 Annex C(informative)Use of PLC programming languages and examples.116 C.1 Preamble.116 C.2 Advance planning.116 C.3 Structure and organization.117 C.4 Use of PLC languages.120 Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-TR 61131-4 IEC:2004(E)3 C.5 User Defined Function Block(DFB).127 C.6 Language implementation.130 Figure 1 Object of user guidelines.8 Figure 2 SRS in risk reduction concept.14 Figure 3 Event tree analysis for deployment of SRS.18 Figure A.1 Basic functional structure of a PLC system.21 Figure A.2 PLC h