Rockwell Automation GV3000/SE AC Gen. Purpose & Vector Bookshelf Drive Start-Up and Reference Manual - Manual (Page 144)

4-58 GV3000/SE AC Bookshelf Drive Software Reference, Version 6.06
H.004 Slip Compensation (continued)
Synchronous RPM = 120 x F
No. of Motor Poles
Example: 1722 RPM
Motor Nominal Current = 78% of Maximum Power Module Amps (P.095)
V/Hz regulation
2
kHz
H.004 = 100 x 1800 - 1722 x 100% = 5.56%
1800 78%
If the parameter is set to zero, motor speed will not be proportional to reference, but
will vary depending on load.
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.
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