Baelz Automatic 6490B Device Manual
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Contents
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Page 14Device manual 6490B / 6490B-y / 6590BW. Bälz & Sohn GmbH & Co. Koepffstraße 5 D-74076 Heilbronn Telefon (07131) 1500-0 Telefax (07131) 1500-213.2 Proportional band PbSetting range: 1.0% to 999.9%Proportional action of the PI(D) three-position step controller3.2.1 Three-position controllerPb = 0.0tn > 0Control action adjustable via dead band db(see also 3.5 db)3.3 Integral action time tnSetting range: 1s to 2600sIntegral action of the PI(D) three-positionstep controller3.3.1 Two-position controllertn = 0Control action adjustable via dead band db(see also 3.5 db)3.4 Derivative action time tdDerivative action of the PID three-position step controllerSetting range: 1s to 255s3.5 Dead band dbNo actuating pulses if control deviation is smaller than dbHysteresis: db/2Setting range:0 to 10th part of the scope of the measuring range[phys. units]0 to + scope of the measuring range [phys. units] at dP = 3(see also 3.2.1 three-position controller3.3.1 two-position controller)3.6 Actuating time t.P(Valve actuation time)Setting range: 5s to 300sTime to pass through the setting range 0% to 100% (stroke) at constant OPEN or CLOSE pulseSetting the valve actuating time t.P has got a very important meaning. It has to be ascertained asexact as possible for each valve and set to the controller. A bad valve actuating time causes a wrongmanipulated variable.3.2.1 Three-position controller3.3.1 Two-position controller3.5 Dead band |
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