Danfoss VLT AutomationDrive FC 300 Programming Manual page 72

Parameter Descriptions
3 3
Illustration 3.28 Quick Stop Ramp Time
3-82 Quick Stop Ramp Type
Option:
[0] Linear
[1] S-ramp Const
Jerk
[2] S-ramp Const
Time
3-83 Quick Stop S-ramp Ratio at Decel. Start
Range:
50 % [ 1 - 99
*
%]
3-84 Quick Stop S-ramp Ratio at Decel. End
Range:
50 % [ 1 - 99 %] Enter the proportion of the total ramp-down
*
70
RPM
P 4-13 RPM
high limit
Reference
P 1-25
Motor speed
P 4-11 RPM
low limit
P 3-81
Qramp
Qstop
Function:
Select the ramp type, depending on
requirements for acceleration and
deceleration. A linear ramp will give
constant acceleration during ramping. An
S-ramp will give non-linear acceleration,
compensating for jerk in the application.
Function:
Enter the proportion of the total ramp-down
time (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.
Function:
time (3-42 Ramp 1 Ramp Down Time) where
the deceleration torque decreases. The larger
the percentage value, the greater the jerk
compensation achieved, and thus the lower
the torque jerks in the application.
MG33MG02 - VLT
®
VLT AutomationDrive Programming Guide
3.5.8 3-9* Digital Pot.Meter
The digital potentiometer enables increase or decrease of
the actual reference by adjusting the set-up of the digital
inputs using the functions Increase, Decrease or Clear. To
activate the function, at least one digital input must be set
up to Increase or Decrease.
Speed
Time
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 [0 -
*
3600 s]
®
is a registered Danfoss trademark
P 3-95
P 3-95
Function:
[0.01 - Enter the increment size required for
200 %] INCREASE/DECREASE, as a percentage of
the synchronous motor speed, n
INCREASE/DECREASE is activated the
resulting reference will be increased/
decreased by the amount set in this
parameter.
Function:
Enter the ramp time, i.e. the time for adjustment
of the reference from 0% to 100% of the
specified digital potentiometer function (Increase,
Decrease or Clear).
If Increase/ Decrease is activated for longer than
the ramp delay period specified in 3-95 Ramp
Delay the actual reference will be ramped up/
down according to this ramp time. The ramp time
is defined as the time used to adjust the
reference by the step size specified in 3-90 Step
Size.
Time (s)
Time (s)
. If
s