5.11 S: Special Applicationu S1: Dynamic Audible Noise Control FunctionThe Dynamic Audible Noise Control Function reduces audible noise by suppressing the output voltage.This function is available when using V/f Control mode and can help to quickly restore output voltage after an impact hascaused a sudden increase in the time constant. Dynamic Audible Noise Control is useful in applications where load impact iscommon.Energy Saving (b8-01 = 1) and Dynamic Audible Noise Control (S1-01 = 1) cannot be used simultaneously.Procedure1. Set S1-01 to 1 to enable Dynamic Audible Noise Control.Note: 1. When S1-01 is set to 1, the tolerance to impact loading is reduced when compared to V/f Control (without EnergySaving).2. Disable Dynamic Audible Noise Control for applications without an impact load.2. Responsiveness is increased because the addition of a load causes the level of the current to rise.Increase the value of S1-02. The flux will become stronger and the torque will rise, but load movement will be minimizedby the Dynamic Audible Noise Control function.Set S1-03 and S1-04 to a small value. Voltage is recovered quicker during impact load conditions. Under certainconditions voltage stability may become poor.Lower the value of S1-05. The voltage level will drop and speed up voltage restoration when the load is increased.3. Increase the value of S1-03 to increase the effectiveness of Dynamic Audible Noise Control if the output voltageremains high.4. Decrease the value of S1-06 to increase drive response to an impact load.5. When the output voltage is unstable, increase the difference between S1-03 and S1-04 and increase S1-05 and S1-06to slow the load response.n S1-01: Dynamic Audible Noise Control SelectionReduces audible noise by decreasing the output voltage in variable torque applications with light loads.Note: Setting b8-01 to 1 and S1-01 to 1 will trigger an oPE16 error.No. Name Setting Range DefaultS1-01 Dynamic Audible Noise Control Selection 0 or 1 0Setting 0: DisabledSetting 1: Enabledn S1-02: Voltage Reduction RateSets the rate at which the output voltage will be reduced as a percentage of the V/f pattern when operating with no load.No. Name Setting Range DefaultS1-02 Voltage Reduction Rate 50.0 to 100.0% 50.0%n S1-03: Voltage Restoration LevelSets the level when the drive should start restoring the voltage as a percentage of the drive rated torque.The voltage is reduced when the torque output has decreased to the level set in S1-03.The method used to reduce the voltage level is selected in accordance with the characteristics of the voltage reduction ratedefined by the S1-03 and S1-04 settings.Note: Setting S1-04 to a value less than that of S1-03 + 10.0 will trigger an oPE02 error.No. Name Setting Range DefaultS1-03 Voltage Restoration Level 0.0 to 90.0% 20.0%5.11 S: Special ApplicationYASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual 2755 Parameter Details
