Rockwell Automation 1395 DC Drive, 800-1250 Hp, FRN 5.XX-9.30 - Manual (Page 137)

Chapter 5
Programming Parameters
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Parameter 652 – Decel Time [Decel Time]
Internal units : seconds x 10
Programming Terminal units: Seconds
Minimum Value: 0.1
Maximum Value: 6553.5
Default Value: 10.0
Description: This parameter determines the deceleration rate of the
velocity reference for all references. Units are measured in seconds
taken to decelerate from base speed to 0 speed. The deceleration
ramp applies to speed changes toward zero speed in either the
forward or reverse direction. The velocity ramp function can be
bypassed by setting a bit 5 to 1 in the logic command word.
Parameter 653 – Desired Contour [Desired Contour]
Internal units : 4096 = 1000h = 100% contour effect
Programming Terminal units: Percent of full contour
Minimum Value: 0%
Maximum Value: 100.0%
Default Value: 0%
Description: This parameter specifies the rounding of the edges of
the velocity profile or “S” filtering. This parameter affects the gain of
a single pole filter that is cascaded with the velocity ramp function.
Increasing the value of this parameter causes the edges of the velocity
reference curve to be more rounded. 100% contour represents
maximum velocity reference filtering. 0% contour will disable the
velocity filter function.
Parameter 657 – Droop Percent [Droop Percent]
Internal units : % droop effect x 10
Programming Terminal units: Percent of base speed @ full load
current.
Minimum Value: 0%
Maximum Value: 25.5%
Default Value: 0%
Description: This parameter specifies the percent of base speed that
the velocity reference will be reduced when at full load current. For
example; given a motor running at base speed and no load, for 5%
droop, the speed becomes 95% of base speed at full load current. 0%
Droop disables the Droop function.