Rockwell Automation Liqui-Flo AC GP Vector Drive Version 6.4 - Manual (Page 140)

4-58 LiquiFlo AC Drive, Software Reference Version 6.4
Important: This function will not provide holding torque as a mechanical brake. DC
braking is only operative when Stop Type (P.025) is set to 1 (ramp stop).
DC braking is used to provide additional motor braking (by DC current flow through
motor windings) at speeds below DC Braking Start Frequency (H.006). If DC braking
is required, DC braking functions (H.008, H.007) must be greater than zero (0).
When the motor decelerates to the preset DC Braking Start Frequency (H.006), the
DC Braking Current (H.007) is applied to the motor after a Power Module-dependent
delay time.
With DC braking enabled (H.005 = ON), braking will be activated after a stop
command when the motor speed is less than or equal to DC Braking Start Frequency
(H.006).
Note that if H.005 is set to ON, and this value is set too high, faults may occur (OC,
OCb, or PUo will be displayed).
H.005 DC Braking Enable
This parameter
enables or disables
DC braking. Parameter Range: ON = Enable DC braking
OFF = Disable DC braking
Default Setting: OFF
Parameter Type: Tunable
Refer also to parameters: P.025 Stop Type
H.006 DC Braking Start Frequency
H.007 DC Braking Current
H.008 DC Braking Time
H.017 Input Power/Snubber Configuration
H.006 DC Braking Start Frequency
This parameter sets
the frequency at
which DC braking
begins. Parameter Range: 0.5 to P.004 (Maximum Speed)
Default Setting: 1.0
Parameter Type: Tunable
Refer also to parameters: H.005 DC Braking Enable
H.007 DC Braking Current
H.008 DC Braking Time