Rockwell Automation GV3000/SE 230VAC 1-20 HP GP & Vector Drive Ver. 6.04 Software Start-Up and Ref. - Manual (Page 111)

4-25 Programming Reference
When S-Curve
accel/decel is
selected, the accel or
decel ramp time
begins and ends
slowly, creating an
S-Curve function.
Refer to figure 4.5.
For V/Hz regulation,
this parameter is
always set = ON.
Parameter Range: OFF = Use linear accel/decel function
ON = Use S-Curve accel/decel function
Default Setting: ON (V/Hz)
OFF (vector)
Parameter Type: Configurable
Refer also to parameters: P.001 Accel Time 1
P.002 Decel Time 1
P.017 Accel Time 2
P.018 Decel Time 2
P.019 S-Curve Enable
Important: This parameter does not apply to the Jog Ramp Accel Time (P.021) or
Jog Ramp Decel Time (P.022) parameters.
The acceleration and deceleration times must be set the same for the S-Curve ramp
to function the same for acceleration as for deceleration. If the deceleration time is
set lower than the acceleration time, the deceleration time specified may not be met.
Figure 4.5 – S-Curves
t t
20% 20%
accel time decel time
P.004 (V/Hz)
U.017 (Vector)
S-Curve Acceleration S-Curve Deceleration