IE_61131-1.pdf

INTERNATIONALSTANDARDIEC61131-1Second edition2003-05Programmable controllers Part 1:General informationAutomates programmables Partie 1:Informations gnralesReference numberIEC 61131-1:2003(E)Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Technip Abu Dabhi/5931917101 Not for Resale,02/12/2006 06:57:29 MSTNo reproduction or networking permitted without license from IHS-,-,-Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe 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,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(http:/www.iec.ch/searchpub/cur_fut.htm)enables you to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just Published This summary of recently issued publications(http:/www.iec.ch/online_news/justpub/jp_entry.htm)is also available by email.Please contact the CustomerService Centre(see below)for further information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Technip Abu Dabhi/5931917101 Not for Resale,02/12/2006 06:57:29 MSTNo reproduction or networking permitted without license from IHS-,-,-INTERNATIONALSTANDARDIEC61131-1Second edition2003-05Programmable controllers Part 1:General informationAutomates programmables Partie 1:Informations gnrales IEC 2003 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,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.chRFor price,see current cataloguePRICE CODECommission Electrotechnique InternationaleInternational Electrotechnical Commission Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Technip Abu Dabhi/5931917101 Not for Resale,02/12/2006 06:57:29 MSTNo reproduction or networking permitted without license from IHS-,-,-2 61131-1 IEC:2003(E)CONTENTSFOREWORD.3INTRODUCTION.51Scope.62Normative references.63Terms and definitions.74Functional characteristics.84.1Basic functional structure of a programmable controller system.84.2Characteristics of the CPU function.114.3Characteristics of the interface function to sensors and actuators.134.4Characteristics of the communication function.144.5Characteristics of the human-machine interface(HMI)function.144.6Characteristics of the programming,debugging,monitoring,testing anddocumentation functions.144.7Characteristics of the power-supply functions.165Availability and reliability.16Bibliography.18Figure 1 Basic functional structure of a PLC-system.8Figure 2 Programmable controller hardware model(from IEC 61131-5).9Figure 3 Typical interface/port diagram of a PLC-system(from IEC 61131-2).10Table 1 Summary of programmable functions.12Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Technip Abu Dabhi/5931917101 Not for Resale,02/12/2006 06:57:29 MSTNo reproduction or networking permitted without license from IHS-,-,-61131-1 IEC:2003(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION_PROGRAMMABLE CONTROLLERS Part 1:General informationFOREWORD1)The IEC(International Electrotechnical Commission)is a worldwide organization for standardization comprisingall national electrotechnical committees(IEC National Committees).The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields.Tothis end and in addition to oth