4-62
GV3000/SE 230 VAC Drive, Software Reference Version 6.04
H.008 DC Braking Time
This parameter sets
the time period for
which DC braking
will be applied.
With DC braking enabled (H.005 = ON), braking will be activated after a stop
command when the decelerating drive reaches a speed corresponding to DC
Braking Start Frequency (H.006). The braking period ends after the programmed
time regardless of the actual motor speed. The value should be set to a level that
avoids activation at rest.
Parameter Range:
0.1 to 20.0 seconds
Default Setting:
3.0
Parameter Type:
Tunable
Refer also to parameters: H.005 DC Braking Enable
H.006 DC Braking Start Frequency
H.007 DC Braking Current
H.009 Avoidance Frequency Enable
This parameter
enables the
avoidance frequency
bands selected in
H.011, H.013, and
H.015.
Parameter Range:
OFF = Disable avoidance frequency processing
ON = Enable avoidance frequency processing
Default Setting:
OFF
Parameter Type:
Tunable
Refer also to parameters: P.003 Minimum Speed
P.004 Maximum Speed
H.010 to H.015 Avoidance Frequency Midpoint and
Band 1, 2, and 3
Operating a motor continuously at a particular frequency may cause vibrational
resonance within some machines. Three independent parameter pairs can be
configured for avoidance frequency and frequency band to prevent motor vibration
by preventing the drive output frequency from operating within the selected band(s).
Refer to figure 4.12.
The actual avoidance frequency selection is limited by Minimum Speed (P.003) and
Maximum Speed (P.004). Normal acceleration and deceleration is not affected by
this function.
