1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationControllers with analogue signals for use in industrial-process control systemsPart 2: Guidance for inspection and routine testingBS EN 60546-2:2010National forewordThis British
2、Standard is the UK implementation of EN 60546-2:2010. It isidentical to IEC 60546-2:2010. It supersedes BS EN 60546-2:1993, which willbe withdrawn on 1 September 2013.The UK participation in its preparation was entrusted by Technical CommitteeGEL/65, Measurement and control, to Subcommittee GEL/65/2
3、, Elements ofsystems.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 62204 5 ICS 25.040.
4、40Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2011.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60546-2:20
5、10EUROPEAN STANDARD EN 60546-2 NORME EUROPENNE EUROPISCHE NORM September 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 C
6、ENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60546-2:2010 E ICS 25.040.40 Supersedes EN 60546-2:1993English version Controllers with analogue signals for use in industrial-process control systems - Part 2: Guidance for inspectio
7、n and routine testing (IEC 60546-2:2010) 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 (CEI 60546-2:2010) Regler mit analogen Signalen fr die Anwendung in Systeme
8、n der industriellen Prozesstechnik - Teil 2: Anleitung fr die Abnahme- und Betriebsuntersuchung (IEC 60546-2:2010) This European Standard was approved by CENELEC on 2010-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving thi
9、s European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official version
10、s (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Au
11、stria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United
12、 Kingdom. BS EN 60546-2:2010EN 60546-2:2010 - 2 - Foreword The text of document 65B/660/CDV, future edition 2 of IEC 60546-2, prepared by SC 65B, Devices & process analysis, of IEC TC 65, Industrial-process measurement, control and automation, was submitted to the IEC-CENELEC parallel vote and was a
13、pproved by CENELEC as EN 60546-2 on 2010-09-01. This European Standard supersedes EN 60549-2:1993. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such paten
14、t rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-09-01
15、Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60546-2:2010 was approved by CENELEC as a European Standard without any modification. _ BS EN 60546-2:2010- 3 - EN 60546-2:2010 Annex ZA (normative) Normative references to international publications
16、with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NO
17、TE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60546-1 2010 Controllers with analogue signals for use in industrial-process control systems - Part 1: Methods of evaluating the perfo
18、rmanceEN 60546-1 201X1)1)At draft stage. BS EN 60546-2:2010 4 60546-2 IEC:2010 CONTENTS 1 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 function
19、s provided by test specimen need consideration) .6 5.2.1 Offset (full test: see Clause 6 of 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 6
20、0546-1) .9 5.3 Power supply variations (full test: see 8.5.1 of IEC 60546-1) . 10 5.4 Transfer 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 cl
21、osed loop tests7 Figure 3 Recorded characteristics of proportional action 8 Figure 4 Recorded characteristics of integral action .9 Figure 5 Recorded characteristics of derivative action .10 BS EN 60546-2:201060546-2 IEC:2010 5 CONTROLLERS WITH ANALOGUE SIGNALS FOR USE IN INDUSTRIAL-PROCESS CONTROL
22、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 in princi
23、ple 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 for acce
24、ptable 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. For date
25、d 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 performance1 3 Term
26、s, 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) y0 output signal at time t = 0 x measured value (see Figure 1) w set point value (see Figure 1) Xp proportional
27、band TI reset time TD rate time KP proportional action factor KI integral action factor KD derivative action factor 1To be published. BS EN 60546-2:2010 6 60546-2 IEC:2010 Controller wx wy xPID IEC 1620/10 Figure 1 Basic signals to/from an idealized controller 4 Sampling for test If, by agreement be
28、tween 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
29、at the 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 t
30、est applies only to controllers with integral action. a) Initial conditions Closed loop according to Figure 2, switch position B. Reverse action. Xp= 100 %, proportional band TI= minimum reset time TD= witched off, if possible, or at minimum rate time b) Test procedure Measure and record the offset,
31、 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
32、Figure 2 is used with the switch in position A. a) Initial conditions Open loop according to Figure 2, switch position A. Xp= 100 %, proportional band Stabilize output y at 50 %. BS EN 60546-2:201060546-2 IEC:2010 7 TI= switched off, if possible, or at maximum reset time after stabilization TD= swit
33、ched off, if possible, 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. 100spanOutput/ spanvalueMeasured100%p = yxyxX NOTE 1 If integral action cannot be made negligible, y shou
34、ld be determined in accordance with Figure 3. Set point generator No. 1 Measured value generator No. 2 Bias generator No. 3 Offset measurement Controller under test Measured value/ output recorder Set point Measured value Output Load Damping Switch A B 1A = open loop B = closed loop IEC 1621/10 Gene
35、rator No. 1 D.C. or pressure for steady-state input Generator No. 2 Step for proportional and integral action tests Generator No. 3 D.C. or pressure for fixed bias levels for test in closed loop Figure 2 Arrangement for open loop or closed loop tests b) Test procedure Introduce a step change of 20 %
36、 of input signal from generator No. 2. Record corresponding change (y %) of output y. 100spanOutput/ spanvalueMeasured100%p = yxyxX NOTE 2 If integral action cannot be made negligible, y should be determined in accordance with Figure 3. BS EN 60546-2:2010 8 60546-2 IEC:2010 Measuredvalue(x) Outputsi
37、gnal(y) xy Time (t) Time (t) Xp= 100 x % y %tOIEC 1622/10 Figure 3 Recorded characteristics of proportional action 5.2.3 Integral action (full test: see 7.3 of IEC 60546-1) The open loop circuit arrangement in Figure 2 is used with the switch in position A. a) Initial conditions Open loop according
38、to Figure 2, switch position A. Xp = 100 %, proportional band TD= switched off, if possible, or at minimum rate time TI= 1 min or at nearest marking of its scale X = w = 50 % b) Test procedure Stabilize output y at 50 % then introduce 20 % step of input signal, by generator No. 2. Record the corresp
39、onding output change, y. Determine reset time TIas shown in Figure 4. BS EN 60546-2:201060546-2 IEC:2010 9 Measuredvalue(x) Outputsignal(y) tOy0Time (t) Time (t) TITID3/ D2D2(asymptote) IEC 1623/10 TI= time interval between D2and D3Figure 4 Recorded characteristics of integral action 5.2.4 Derivativ
40、e action (for a more accurate test: see 7.4 of IEC 60546-1) Applicable to controllers with derivative action on x w and not on those with derivative action on x only. a) Initial conditions Open loop according to Figure 2, switch position B. Xp = 100 %, proportional band Stabilize output y at 50 %. T
41、I= switched off, if possible, or at maximum reset time after stabilization TD= 1 min w = 50 % b) Test procedure Introduce step change of 10 % to 20 % of set point span from generator No. 1. Record corresponding change of output signal y. Determine rate time TDas shown in Figure 5. BS EN 60546-2:2010
42、 10 60546-2 IEC:2010 Set point (w) Outputsignal(y) wKDTime (t) Time (t) tOKpKp+ 1 wKDKpT D = IEC 1624/10 Figure 5 Recorded characteristics of derivative action 5.3 Power supply variations (full test: see 8.5.1 of IEC 60546-1) Routine testing of power supply variations can be made under the following
43、. a) Initial conditions See 5.1.1 of IEC 60546-1 and with controller connected to maximum rated load. b) Test procedure Measure the effect on offset of the following variations in power supply or the manufacturers stated limits, if smaller. Voltage variation: 1015+ % of nominal a.c. or d.c. voltage.
44、 Air pressure variation: 10 % of nominal pressure. BS EN 60546-2:201060546-2 IEC:2010 11 5.4 Transfer between manual and automatic The method of assessment of the performance of the automatic/manual transfer facility shall be agreed between manufacturer and user. 5.5 Set point generator NOTE For con
45、trollers with no accessible set point connections, suitable test procedures should be agreed between manufacturer and user. Test procedure Determine that w is able to reach at least 0 % and 100 % and compare its value with scale indication if possible. 5.6 Manual loading transmitter Test manual load
46、ing transmitter to determine that y is able to reach at least 0 % and 100 %. Check the corresponding scale indication, if existing. NOTE If these tests of the manual loading function are not applicable, equivalent tests should be agreed between manufacturer and user. BS EN 60546-2:2010 12 60546-2 IE
47、C:2010 Bibliography IEC 60050-351, International Electrotechnical Vocabulary Part 351: Control technology IEC 60381-1, Analogue signals for process control systems Part 1: Direct current signals IEC 60381-2, Analogue signals for process control systems Part 2: Direct voltage signals IEC 60410, Sampl
48、ing plans and procedures for inspection by attributes _ BS EN 60546-2:2010This page deliberately left blankBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Char
49、ter.British Standards Institution (BSI)raising standards worldwideBSI Group Headquarters389 Chiswick High Road London W4 4AL UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments ored
