Fout [Hz]Fedge = FmaxUstart = 10 %26.07.2012v_u_f_dia_icontr_d.vsd2 3 4 5 6 7 8 9 10Analog In 145 504035302520151052 4 6 8 10 12 14 16 18 200...10 V0...20 mA10 20 30 40 50 60 70 80 90 100 0...100 % PWMUout100 %0.515FoffFonUstart = 0 %LQUout Output voltageFout: Output frequencyAnalog In Speed setting signal (0 - 10 V, 0...20 mA, 0...100 % PWM)Ustart Start-up voltageFoff Shutdown Freq.Fon: Switch on Freq.Fedge EdgefrequencyFmax Maximum frequencyL Linear (factory setting)Q SquareStartvoltageStartvoltageThe start voltage is used to apply enough torque to the motors to insure they will run atlow speed.Attention! In order to prevent over current and unnecessarily high thermal load of themotor, do not select to high a setting.Adjustment range: 0 - 25 % (percentage of the maximum output voltage)Factory setting: 0 %VF quadraticVF quadraticU/f curve linear or squareFactory setting“UF quadratic” = “OFF” i.e linear curve pre-programmed.In the case of linear characteristic curves, the motor achieves full torquethroughout the entire speed range. For fans operation a optimal speed control isgenerally achieved through this.Switching over to square characteristic curve (only permisible in fans and pumps withsquare torque moment) might make sense in order to reduce the electromagneticmotor noises. “UF square”= “ON”9.12.4 Setting for Rampup time and Rampdown timeBy separate menus for Rampup time and Rampdown time an adjustment is possible to individualsystem conditions.This function is switched behind the actual controller function.Rampup timeRampup timeTime setting in which the automatic controller output from 0 % to 100 % rises.Setting range: 0...250 sec.Factory setting: 10 / 20 / 30 / 40 sec. (depending on device type)Rampdown timeRampdown timeTime setting in which the automatic controller output from 100 % to 0 % reduces.Setting range: 0...250 sec.Factory setting: 10 / 20 / 30 / 40 sec. (depending on device type)Operating Instructions Icontrol – model series FXDM ProgrammingL-BAL-E036-GB 1422 Index 008 Part.-No. 00154773-GB67/96