1、TECHNICAL SPECIFICATION IECTS 61804-1 First edition 2003-10 Function blocks (FB) for process control Part 1: Overview of system aspects Reference number IEC/TS 61804-1:2003(E)Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. For exam
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7、mation. 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 TECHNICAL SPECIFICATION IEC TS 61804-1 First edition 2003-10 Function blocks
8、(FB) for process control Part 1: Overview of system aspects PRICE CODE IEC 2003 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 th
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10、 Electrotechnical Commission 2 TS 61804-1 IEC:2003(E) CONTENTS FOREWORD 5 INTRODUCTION 7 1 Scope 9 2 Normative references11 3 Terms, definitions and abbreviated terms11 3.1 General definitions.11 3.2 Definitions based on IA/IM-channel17 3.3 Abbreviated terms .18 4 Engineering requirements .18 4.1 Ge
11、neral .18 4.2 Requirements for design phase .18 5 Compatibility levels.19 5.1 General .19 5.2 Incompatibility .21 5.3 Coexistence.21 5.4 Interconnectability .21 5.5 Interworkability 21 5.6 Interoperability.21 5.7 Interchangeability 21 6 Functional requirements .22 6.1 General .22 6.2 System (or chan
12、nel or device) status .22 6.3 Validity index (VI) 24 6.4 Signal processing 24 6.5 Measurement information processing.24 6.6 Device diagnostics and test support.26 6.7 Local interfaces attachment.27 6.8 Device (and system and channel) management .27 7 FB application requirements .31 7.1 System overvi
13、ew31 7.2 Overview of basic FB types33 7.3 FB requirements 35 7.4 Initial sets of FBs derived from I 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 par
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21、 this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare International Standards. In exceptional circumstances, a technical committee may propose the publication
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23、on an International Standard. Technical specifications are subject to review within three years of publication to decide whether they can be transformed into International Standards. IEC 61804-1, which is a Technical Specification, has been prepared by subcommittee 65C: Digital communications, of IE
24、C technical committee 65: Industrial-process measurement and control. This standard cancels and replaces IEC/PAS 61804-1 published in 2002. 6 TS 61804-1 IEC:2003(E) The text of this technical specification is based on the following documents: Enquiry draft Report on voting 65C/296/DTS 65C/310A/RVC F
25、ull information on the voting for the approval of this technical specification 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. IEC 61804 consists of the following parts under the general title Fun
26、ction blocks (FB) for process control Part 1: Overview of system aspects Part 2: Specification of FB concept and electronic device description language (EDDL) The committee has decided that the contents of this publication will remain unchanged until 2007. At this date, the publication will be trans
27、formed into an International standard; reconfirmed; withdrawn; replaced by a revised edition, or amended.TS 61804-1 IEC:2003(E) 7 INTRODUCTION This Technical Specification is an end-user driven specification of the requirements of distributed process control systems based on Function Blocks (FB). Th
28、is Technical Specification and its associated FB standard (IEC 61804-2) originate from the power-plant industrial sector. It is validated by applications in oil and gas, petrochemicals, pharmaceuticals and fine chemicals, pulp and paper, food and beverage, waste water treatment plants, steel milling
29、 and others. There will be other general requirement standards and associated specifications for other industrial sectors. Present and future digital process control systems need to fulfil the following requirements: increase security and safety; reduce time to market; be supportable with available
30、tools; reduce costs of development and support; minimize training costs; support integration of distributed control applications support integrated methodology for implementation; have increased maintainability, modifiability, agility, upgradeability, flexibility, ability to validate, accessibility,
31、 availability, compatibility of support tools, multi-vendor device/ application compatibility, re-usability of knowledge and designs, re-usability of software components; be made up of digital devices that are compatible, interworkable, interconnectable interoperable and interchangeable with each ot
32、her. Process control systems are required to fulfil these requirements in terms of their architecture and their operation during all the phases of the life cycle. The accepted basic concept for the design process control system is to describe all necessary implementation-specific functions with FB.
33、A FB is an encapsulation of data and algorithms to provide a specific function, which can be self-standing. Process control systems can involve many instances of many different FBs operating in an environment providing common services (for example, communications) and interfaces to other applications. See Figure 1.
