IEC-PAS-62424-2005.pdf
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1、 PUBLICLY AVAILABLE SPECIFICATION IEC PAS 62424 Pre-Standard First edition 2005-06 Representation of process control engineering requests in P any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental or
2、ganizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technica
3、l matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC N
4、ational Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformit
5、y, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC
6、provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, em
7、ployees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of
8、the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to th
9、e possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. A PAS is a technical specification not fulfilling the requirements for a standard, but made available to the public. I
10、EC-PAS 62424 has been processed by IEC technical committee 65: Industrial-process measurement and control. The text of this PAS is based on the following document: This PAS was approved for publication by the P-members of the committee concerned as indicated in the following document Draft PAS Repor
11、t on voting 65/356/NP 65/361/RVN Following publication of this PAS, which is a pre-standard publication, the technical committee or subcommittee concerned will transform it into an International Standard. This PAS shall remain valid for an initial maximum period of three years starting from 2005-06.
12、 The validity may be extended for a single three-year period, following which it shall be revised to become another type of normative document or shall be withdrawn. Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=NASA Marshall Space Flight Center/9
13、972545001 Not for Resale, 03/07/2007 02:40:45 MSTNo reproduction or networking permitted without license from IHS -,-,- PAS 62424 IEC:2005(E) 7 INTRODUCTION Efficient process engineering requires highly sophisticated tools for the different needs of the departments involved. These engineering tools
14、are normally specialised in process design (PD), in process control engineering (PCE), etc. Therefore, working interoperability is essential to optimise the engineering process in total. Thus, the definition of a harmonised interface and data management is a core task to ensure a smooth workflow thr
15、oughout the whole project and to guarantee data consistency in the different tools. This document defines procedures and specifications for the exchange of PCE relevant data provided by the P b) Foil strain gauge; c) pH electrode. 3.5 Actuator functional unit that generates from the controller outpu
16、t variable the manipulated variable required to drive the final controlling element NOTE If the final controlling element is mechanically actuated, it is controlled via an actuating drive. The actuator drives the actuating drive in this case. EXAMPLE A practical example of an actuator acting directl
17、y on the final controlling element is a d.c. drive. The control unit takes the function of an actuator. The final controlling element is formed by the thyristor assembly that delivers a variable d.c. voltage as an output variable. The control unit and the thyristor assembly together form the final c
18、ontrolling equipment. 3.6 CE loop collection of PCE requests and PCE control functions depicting their functional coherence 3.7 Bubble symbol used to denote and identify a process function. It contains an identification 3.8 process function function in a process IEC 61512-1 Copyright International E
19、lectrotechnical Commission Provided by IHS under license with IECLicensee=NASA Marshall Space Flight Center/9972545001 Not for Resale, 03/07/2007 02:40:45 MSTNo reproduction or networking permitted without license from IHS -,-,- PAS 62424 IEC:2005(E) 11 3.9 PCE control function function in a PCE con
20、trol IEC 61512-1 3.10 process category letter that designates the kind of process control request 4 Abbreviations Table 1 shows the abbreviations used in this specification. Table 1 Abbreviations CAD Computer Aided Design CAE Computer Aided Engineering CAEX Computer Aided Engineering eXchange CCR Ce
21、ntral Control Room E it shall not allow unguided automatic changes. The configurable Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=NASA Marshall Space Flight Center/9972545001 Not for Resale, 03/07/2007 02:40:45 MSTNo reproduction or networking pe
22、rmitted without license from IHS -,-,- 12 PAS 62424 IEC:2005(E) checking step shall include functionality for automatic or manual acceptance of data changes, allowing single decisions up to bulk data management. All changes in the proprietary database and all data inconsistencies discovered shall be
23、 reported by the import application. The generation of the report shall be configurable. The import/export application shall assure that the intersection of the different databases holds the same information and that additional division specific data is handled in a consistent way. Data manipulation
24、 by a project division is an ongoing process during the whole project and beyond it. Thus, the creation, changing and deletion of data shall be possible during the life-cycle of the plant. CAEX databases shall be consistent. This requires a consistency check before exporting the data. This procedure
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