Lenze E94AxHE Servo Drives 9400 HighLine (Firmware 01-37) - Manual (Page 91)

L
Firmware 1.37 - 09/2006 91
9400 HighLine | Parameter setting & configuration
Motor interface
Extended commissioning | Set current setpoint filter
M
How to set the current setpoint filters:
1. Adjust the current control loop.
2. In
C00071 adjust the reset time of the speed controller to the filter time constant
of the speed filter ( C00497 ) and the equivalent time constant of the current control
loop: C00071 = 16 * ( C00497 + 200 μs)
3. Slowly increase the proportional gain n C00070 , until the speed control loop starts
to become unstable (noticed acoustically or by measuring the motor current).
4. Measure the oscillation frequency using an oscilloscope (observe current or speed).
5. Set the measured oscillation frequency in
C00270/1 as filter frequency.
6. Set "50%" of the filter frequency in C00271/1 as filter width.
• Example: Filter frequency = 200 Hz  filter width = 100 Hz.
7. Set "40 dB" in C00272/1 as filter depth.
• If the filter depth is set to "0 dB" (default setting), the filter is not active.
8. Continue to increase the proportional gain in C00070 until the speed control loop
starts to become instable again.
• If the oscillation frequency has changed now, readjust the filter frequency by
trimming. The use of a second filter is ineffective here.
• If the oscillation frequency remains the same, readjust the filter depth and/or
the filter width by trimming (the first reduces the amplitude, the second lets the
phase rotates faster).
• Repeat step 8 until the desired behaviour or the limit of a sensible speed
controller gain has been reached.
9. Save parameter set ( C00002 = "11").
Note!
Readjust the speed controller after setting the current setpoint filter.
Optimise speed controller
. (C 88)