Danfoss VLT AutomationDrive FC 301 Programming Manual page 103

Parameter Descriptions
RPM
P 4-13 RPM
high limit
Reference
P 1-25
Motor speed
P 4-11 RPM
low limit
Illustration 3.28 Quick Stop Ramp Time
3-82 Quick Stop Ramp Type
Option: Function:
Select the ramp type, depending on
requirements for acceleration and
deceleration. A linear ramp gives
constant acceleration during
ramping. An S-ramp gives non-
linear acceleration, compensating
for jerk in the application.
[0] Linear
*
[1] S-ramp Const
Jerk
[2] S-ramp Const
Time
3-83 Quick Stop S-ramp Ratio at Decel. Start
Range: Function:
50 % [ 1 - 99 %] Enter the proportion of the total
*
ramp-down time
(parameter 3-42 Ramp 1 Ramp Down
Time) where the deceleration
torque increases. The larger the
percentage value, the greater the
jerk compensation achieved, and
thus the lower the torque jerks in
the application.
3-84 Quick Stop S-ramp Ratio at Decel. End
Range: Function:
50 % [ 1 - 99 %] Enter the proportion of the total
*
ramp-down time
(parameter 3-42 Ramp 1 Ramp Down
Time) where the deceleration
torque decreases. The larger the
percentage value, the greater the
jerk compensation achieved, and
M0013101
Programming Guide
3-84 Quick Stop S-ramp Ratio at Decel. End
Range:
3-89 Ramp Lowpass Filter Time
Range:
1 ms
3.4.9 3-9* Digital Pot.Meter
Time
P 3-81
Qramp
The digital potentiometer enables increase or decrease of
Qstop
the actual reference by adjusting the set-up of the digital
inputs using the functions increase, decrease, or clear. To
activate the function, set at least 1 digital input to increase
or decrease.
Speed
Inc
Illustration 3.29 Increase Actual Reference
Speed
Dec
Inc
Illustration 3.30 Increase/Decrease Actual Reference
3-90 Step Size
Range:
0.10 %
3-91 Ramp Time
Range:
1 s
*
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Function:
thus the lower the torque jerks in
the application.
Function:
[1 - 2000 ms] Use this parameter to set how
*
smoothly the speed changes.
P 3-95
P 3-95
Function:
[0.01 - Enter the increment size required
*
200 %] for increase/decrease as a
percentage of the synchronous
motor speed, n
decrease is activated, the resulting
reference is increased or decreased
by the value set in this parameter.
Function:
[0 - 3600 s] Enter the ramp time, that is the
time for adjustment of the
3
Time (s)
Time (s)
. If increase/
s
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