ZIEHL-ABEGG FXDM25 Operating Instructions Manual

Contents

9.9.7 Reverse action of the control functionController Setup For the effect of the regulation there are two functions:• ON for “Val>Set=n+” increasing Fanlevel for increasing actual value overSetpoint.• OFF for “Val>Set=n+” increasing Fanlevel for decreasing actual value belowSetpoint.Display for operation with two control circuits:“1. Actual>Set=n” for control circuit 1“2. Actual>Set=n” for control circuit 2For special applications an external switch over of the control function is possible (IO Setup).ONVal>Set=n+Factory setting dependingon selected modeExample for temperature control (Idealized principle diagram)Mode ControllerfunctionnM100 %IS RROFF ON10.05.2007v_umkehr_regelfunktion.vsdnM Motor speedR PbandS SetpointI Actual valueOFF for Val > Set = n+ = heating functionON for Val > Set = n+ = cooling function1.01 non2.01 ... ON3.01 ... ON4.01 ... OFF5.01 ... OFF6.01 ... OFF9.9.8 Controller configurationThe “controller configuration” is automatically carried out during selection of the application relatedmode of operation (Base setup). The factory presets in accordance with the mode of operation arebased on many years of experience, which is suitable for many applications. Under special circum-stances, these can be individually adapted ( Menu group “setting”).Controller Setup The type of control determines the method with which the controlled value behaves incase of a difference between the target and current values. For this, the controltechnology has standard algorithms, which consist of a combination of three methods:Selection P, PID:• P control (Proportional component, proportion of the absolute deviation)• I control (Integral component, proportion of the sum of all deviations)• D control (Differential component, proportion of the last difference)Display for operation with two control circuits:“1.Controller type” for control circuit 1“2.Controller type” for control circuit 2PType of controlWith pure P controllers (controller type P), the following described settings do not have any function.If needed, the most suitable combination for the respective control system can be determined from theseproportions.The control configuration (KP, KI, KD, TI) is identical for both control circuits in operation with two control circuits.Fine adjustment is possible for each control circuit by the separate “Pband” setting.Controller Setup P-component = reaction timeSetting range: 0 - 200 %smaller = more slowlybigger = faster50 %KPOperating Instructions Fcontrol – model series FXDM25/32AM ProgrammingL-BAL-E212-GB 1451 Index 003 Part.-No.59/123