Rockwell Automation Liqui-Flo AC GP Vector Drive Version 6.4 - Manual (Page 107)

Programming Reference 4-25
In V/Hz regulation, this parameter specifies the time in which motor speed ramps from
Maximum Speed (P.004) to zero speed.
In vector regulation, this parameter specifies the time in which motor speed ramps
from Motor Top Speed (U.017) to zero speed.
The time it takes the motor to make any speed decrease (except a coast-to-rest stop)
is directly proportional to the value in this parameter.
This parameter does not apply if JOG is selected.
Important: This parameter does not apply to the Jog Ramp Accel Time (P.021) or
Jog Ramp Decel Time (P.022) parameters.
P.018 Decel Time 2 (RAMP 2)
This parameter
specifies the
deceleration time
when a second ramp
selection is
configured as a
digital input.
When the RAMP 2
deceleration time
digital input is
asserted, the RAMP
2 acceleration time
also takes effect.
Parameter Range: 1.0 to 999.9 seconds (V/Hz)
0.1 to 999.9 seconds (vector)
Default Setting: 20.0
Parameter Type: Tunable
Refer also to parameters: P.002 Decel Time 1
P.007 Terminal Strip Digital Inputs Configure
P.019 S-Curve Enable
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