IEC_61804-2-2006.pdf

INTERNATIONAL STANDARD IEC61804-2 Second edition2006-09 Function blocks(FB)for process control Part 2:Specification of FB concept Reference number IEC 61804-2:2006(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.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committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also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 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONAL STANDARD IEC61804-2 Second edition2006-09 Function blocks(FB)for process control Part 2:Specification of FB concept IEC 2006 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 XA For price,see current cataloguePRICE CODE Commission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 61804-2 IEC:2006(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms,definitions and abbreviated terms and acronyms.8 3.1 Terms and definitions.8 3.2 Abbreviated terms and acronyms.14 4 General Function Block(FB)definition and EDD model.14 4.1 Device structure(device model).14 4.2 Block combinations.25 5 Detailed block definition.28 5.1 General.28 5.2 Application FBs.28 5.3 Component FBs.36 5.4 Technology Block.36 5.5 Device(Resource)Block.45 5.6 Algorithms common to all blocks.47 6 FB Environment.49 7 Mapping to System Management.49 8 Mapping to Communication.49 9 Conformance statement.51 Annex A(informative)Parameter description.52 Annex B(normative)IEC 61804 Conformance Declaration.58 Bibliography.59 Figure 1 Position of the IEC 61804 series related to other standards and products.6 Figure 2 FB structure is derived out of the process(P&ID view).15 Figure 3 FB structure may be distributed between devices.16 Figure 4 IEC 61804 FBs can be implemented in different devices.17 Figure 5 General components of devices.17 Figure 6 Block types of IEC 61804.18 Figure 7 IEC 61804 block overview(graphical representation not normative).19 Figure 8 UML class diagram of the device model.22 Figure 9 Measurement process signal flow.26 Figure 10 Actuation process signal flow.26 Figure 11 Application process signal flow.27 Figure 12 Analog Input FB.28 Figure 13 Analog Output FB.30 Figure 14 Discrete input FB.31 Figure 15 Discrete Output FB.32 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61804-2 IEC:2006(E)3 Figure 16 Calculation FB.34 Figure 17 Control FB.35 Figure 18 Temperature Technology Block.36 Figure 19 Pressure Technology Block.39 Figure 20 Modulating actuation technology block.41 Figure 21 On/Off Actuation Technology Block.43 Figure 22 Harel state chart.46 Figure 23 Application structure of ISO OSI Reference Model.49 Figure 24 Client/Server relationship in terms of OSI Reference Model.50