Danfoss VLT AutomationDrive FC 301 Programming Manual page 78

Parameter Descriptions
3.4.8 3-8* Other Ramps
3-80 Jog Ramp Time
Range:
3.00 [0.01 -
3 3
s 3600.00 s]
*
RPM
P 4-13 RPM
high limit
P 1-25
Motor speed
P 3-19
Jog speed
P 4-11 RPM
low limit
Illustration 3.27 Jog Ramp Time
Par . 3 − 80 =
Δ jog speed par . 3 − 19 RPM
3-81 Quick Stop Ramp Time
Range:
3.00 s [0.01 -
*
3600.00 s]
76
VLT
Function:
Enter the jog ramp time, that is the
acceleration/deceleration time between 0 RPM
and the rated motor frequency n
the resulting output current required for the
given jog ramp time does not exceed the
current limit in parameter 4-18 Current Limit.
The jog ramp time starts after activation of a
jog signal via the LCP, a selected digital input,
or the serial communication port. When jog
state is disabled, then the normal ramping
times are valid.
t jog t jog
P 3-80 P 3-80
Ramp up
Ramp down
(acc) (dec)
t s x n RPM
jog s
Function:
Enter the quick–stop ramp-down time, that
is the deceleration time from the
synchronous motor speed to 0 RPM. Ensure
that no resulting overvoltage occurs in the
inverter due to regenerative operation of
the motor required to achieve the given
ramp-down time. Ensure also that the
generated current required to achieve the
given ramp-down time does not exceed the
current limit (set in parameter 4-18 Current
Limit). Quick stop is activated with a signal
on a selected digital input, or via the serial
communication port.
Danfoss A/S © 01/2018 All rights reserved.
®
AutomationDrive FC 301/302
. Ensure that
s
Illustration 3.28 Quick Stop Ramp Time
3-82 Quick Stop Ramp Type
Option:
Time
[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 %]
3-89 Ramp Lowpass Filter Time
Range:
1 ms [1 - 200 ms] Use this parameter to set how smoothly
*
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 gives constant
acceleration during ramping. An S-ramp
gives non-linear acceleration, compen-
sating for jerk in the application.
Function:
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.
Function:
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 thus the
lower the torque jerks in the application.
Function:
the speed changes.
Time
MG33MO02