156Ld.25VmaxregulationSets the output voltage level as a percentage of the available with 100% equal tothe maximum available. The drive will attempt to regulate the output voltage fromgoing above this value by reducing the magnetizing current of induction motorsor de-fl uxing for PM motors. The nominal value is 97% which will regulate thevoltage to just under 100%.Current control proportional gain. Calculated from the motor data.Current control integral gain. Calculated from the motor data.The acceleration torque is used to calculate the system inertia. By entering a torquevalue in this parameter, the corresponding inertia is calculated from the mechanicaldata in LF.20...LF23 and the acceleration rate adjusted in 2.LF.51. The resultinginertia value is loaded into Ld.30 and the feed forward torque control turned on.The total system inertia, motor and load in kgm 2 for gearless and kgcm 2 forgeared applications. The torque value is determined by using the I Lrn functionin parameter LF.3. The value is the acceleration torque minus the torque whilerunning at contract speed. The I Lrn function will automatically bring you to thisparameter to enter the torque value.This is the system inertia in kgm 2 as calculated through parameter Ld.29 or viameasurements made via PC software. When this value is not equal to zero andthe gain value in Ld.32 is also not equal to zero the FFTC function is active.Feed forward torque control filter. Provides a filter on the output of the FFTC. Fordigital speed or position control a value of 8 mSec is recommended. For analogcontrol a value of 16 mSec is recommended.Unit: -Value range: off, 4, 8, 6, 32, 64, 128, 256, 512, 1024 mSecDefault: 0; 0ffDetermines the relative gain of the feed forward torque command. 100% = unitycommand. A value of 90% is recommend. Higher values strengthen the response,lower values weaken the response. It may be necessary when using FFTC tolower the value of LF.32 and LF.33.Provides a PT1 filter on the torque command signal before it is feed into the currentcontrol.Unit: -Value range: off, 4, 8, 6, 32, 64, 128, 256, 512, 1024, 2048 mSecDefault: 1; 0.5msLd.27KP currentLd.28KI currentLd.30System inertiaLd.31FFTC filterLd.32FFTC gainLd.33Torquecommand filterLd.29AccelerationtorqueAdvanced Drive Data
