1、 IEC 60546-2 Edition 2.0 2010-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Controllers with analogue signals for use in industrial-process control systems Part 2: Guidance for inspection and routine testing Rgulateurs signaux analogiques utiliss pour les systmes de conduite des processus industrie
2、ls Partie 2: Recommandations pour les essais dinspection et les essais individuels de srie IEC 60546-2:2010 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in an
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16、 donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60546-2 Edition 2.0 2010-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Controllers with analogue signal
17、s for use in industrial-process control systems Part 2: Guidance for inspection and routine testing Rgulateurs signaux analogiques utiliss pour les systmes de conduite des processus industriels Partie 2: Recommandations pour les essais dinspection et les essais individuels de srie INTERNATIONAL ELEC
18、TROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE M ICS 25.040.40 PRICE CODE CODE PRIX ISBN 978-2-88912-040-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 60546-2 IEC:2010 CONTENTS FOREWORD.3 1
19、Scope.5 2 Normative references .5 3 Terms, definitions and symbols 5 3.1 Symbols used in this standard.5 4 Sampling for test 6 5 Performance tests 6 5.1 General .6 5.2 Tests of controller action (only functions provided by test specimen need consideration) .6 5.2.1 Offset (full test: see Clause 6 of
20、 IEC 60546-1).6 5.2.2 Proportional action (full test: see 7.2 of IEC 60546-1)6 5.2.3 Integral action (full test: see 7.3 of IEC 60546-1).8 5.2.4 Derivative action (for a more accurate test: see 7.4 of IEC 60546-1) .9 5.3 Power supply variations (full test: see 8.5.1 of IEC 60546-1) .10 5.4 Transfer
21、between manual and automatic .11 5.5 Set point generator11 5.6 Manual loading transmitter 11 Bibliography12 Figure 1 Basic signals to/from an idealized controller.6 Figure 2 Arrangement for open loop or closed loop tests7 Figure 3 Recorded characteristics of proportional action8 Figure 4 Recorded ch
22、aracteristics of integral action.9 Figure 5 Recorded characteristics of derivative action .10 60546-2 IEC:2010 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CONTROLLERS WITH ANALOGUE SIGNALS FOR USE IN INDUSTRIAL-PROCESS CONTROL SYSTEMS Part 2: Guidance for inspection and routine testing FOREWORD 1)
23、 The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical
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31、 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 the publication, use
32、 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 the possibility that s
33、ome 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. International Standard IEC 60546-2 has been prepared by subcommittee 65B: Devices and process analysis, of IEC technical committee 65: Ind
34、ustrial-process measurement, control and automation. This second edition cancels and replaces the first edition, published in 1987. This second edition constitutes a minor technical revision made to bring some terms, measurement units and references up to date. The text of this standard is based on
35、the following documents: CDV Report on voting 65B /660/CDV 65B /718A/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. 4 60546-2 IEC:2010 This publication has been drafted in accordance with the ISO/IEC Directives,
36、 Part 2. A list of all parts of the IEC 60546 series, under the general title: Controllers with analogue signals for use in industrial-process control systems, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability d
37、ate indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60546-2 IEC:2010 5 CONTROLLERS WITH ANALOGUE SIGNALS FOR USE IN INDUSTRIAL-PROCESS
38、 CONTROL SYSTEMS Part 2: Guidance for inspection and routine testing 1 Scope This International Standard applies to pneumatic and electrical industrial-process controllers using analogue signals which are in accordance with IEC 60381-1 and IEC 60381-2. The provisions of this standard are applicable
39、in principle to controllers having different, but continuous signals. This standard is intended to provide technical guidance for inspection and routine testing of controllers, for instance, as acceptance tests or after repair. For a full evaluation, IEC 60546-1 should be used. Quantitative criteria
40、 for acceptable performance are established by agreement between manufacturer and user. The requirements of this standard are effective when agreed upon by the manufacturer and the user. 2 Normative references The following referenced documents are indispensable for the application of this document.
41、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60546-1:_, Controllers with analogue signals for use in industrial-process control systems Part 1: Methods of evaluating the performanc
42、e 13 Terms, definitions and symbols For the purposes of this document, the terms and definitions given in IEC 60546-1 apply. 3.1 Symbols used in this standard t time y output signal (see Figure 1) y 0output signal at time t = 0 x measured value (see Figure 1) w set point value (see Figure 1) X p pro
43、portional band T Ireset time T D rate time K Pproportional action factor K I integral action factor K Dderivative action factor 1To be published. 6 60546-2 IEC:2010 Controller w x w y x PID IEC 1620/10 Figure 1 Basic signals to/from an idealized controller 4 Sampling for test If, by agreement betwee
44、n manufacturer and user, tests are to be performed on a sample lot, it is recommended that a sampling method such as presented in IEC 60410 be selected. When sampling is used, controllers to be tested may be chosen by the users inspector. 5 Performance tests 5.1 General Environmental conditions at t
45、he location of testing shall be recorded. Recommended conditions can be found in 5.1.1 of IEC 60546-1. The following tests shall be performed. 5.2 Tests of controller action (only functions provided by test specimen need consideration) 5.2.1 Offset (full test: see Clause 6 of IEC 60546-1) This test
46、applies only to controllers with integral action. a) Initial conditions Closed loop according to Figure 2, switch position B. Reverse action. X p = 100 %, proportional band T I= minimum reset time T D= witched off, if possible, or at minimum rate time b) Test procedure Measure and record the offset,
47、 on the differential measuring device, for set point w = 50 %. Note x and w indications, and check corresponding scale indications, if existing. Repeat the measurement with w = 10 % and then w = 90 %. 5.2.2 Proportional action (full test: see 7.2 of IEC 60546-1) The open loop circuit arrangement in
48、Figure 2 is used with the switch in position A. a) Initial conditions Open loop according to Figure 2, switch position A. X p= 100 %, proportional band Stabilize output y at 50 %. 60546-2 IEC:2010 7 T I= switched off, if possible, or at maximum reset time after stabilization T D= switched off, if po
49、ssible, or at minimum rate time X = w = 50 % b) Test procedure Introduce a step change of 20 % of input signal from generator No. 2. Record corresponding change (y %) of output y. 100 span Output / span value Measured 100 % % p = = y x y x X NOTE 1 If integral action cannot be made negligible, y should be determined in accordance with Figure 3. Set point
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