Rockwell Automation 22A PowerFlex 4 Custom Firmware - DA Option - Manual (Page 3)

PowerFlex 4 Custom Firmware 3
Parameter Settings
The following parameters need to be adjusted for the fast stop application.
P037 [Stop Mode]
Set this parameter to one of the DC braking modes (2, 3, 6, or 7).
Mode 3 is probably the preferred mode, but mode 2 may provide slightly better
performance if there is mechanical inertia and/or mechanical backlash. Mode 3
applies braking until the drive stops, then releases the brake. If there is still some
external mechanical inertia when the brake is released, the drive (system) may
coast for a short period. Mode 2 applies the brake for the full period of time
specified in parameter 80 acting as a holding brake, even after the motor comes to
rest. Mode 6 is the same as Mode 2 and Mode 7 is the same as Mode 3, except that
Mode 6 and 7 do not permit a simple stop to clear faults if they occur.
P042 [DC Brk Pressure]
It is adjustable from 80 (minimum initial braking pressure) to 2000 (maximum
initial braking pressure). The standard software version applied minimum initial
brake “pressure” to minimize “jerk”, but let the drive coast an extended period
before braking became effective. A higher value in the parameter increases the
initial braking force. A value of 2000 during testing with some motors resulted in
some “cogging” and noise. Values between 1200 and 1600 achieved good
performance in general, but some modification in this range may yield better
operation.
P080 [DC Braking Time]
Set to 0.1 sec for testing.
This is the maximum amount of time the DC brake will be applied.
P081 [DC Braking Current]
Set to maximum for testing (1.8 times drive rated output current).