Danfoss VLT AutomationDrive FC 361 Programming Manual page 61

Parameter Descriptions
3-77 Ramp 4 S-ramp Ratio at Decel. Start
Range: Function:
50 % [ 1 - 99 %] Enter the proportion of the total
*
ramp-down time
(parameter 3-72 Ramp 4 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.
3-78 Ramp 4 S-ramp Ratio at Decel. End
Range: Function:
50 % [ 1 - 99 %] Enter the proportion of the total
*
ramp-down time
(parameter 3-72 Ramp 4 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.
MG06J202
Programming Guide
4.4.7 3-8* Other Ramps
3-80 Jog Ramp Time
Range:
Size
related
*
P 4-13 RPM
high limit
Motor speed
Jog speed
P 4-11 RPM
Illustration 4.20 Jog Ramp Time
Par . 3 − 80 =
3-81 Quick Stop Ramp Time
Range:
Size
related
*
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Function:
[0.01 - 3600 Enter the jog ramp time, that is the
s] acceleration/deceleration time
between 0 RPM and the rated
motor frequency n
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.
RPM
P 1-25
P 3-19
low limit
t jog
P 3-80 P 3-80
Ramp up Ramp down
(acc)
(dec)
t s x n RPM
jog s
Δ jog speed par . 3 − 19 RPM
Function:
[0.01 - 3600 Enter the quick–stop ramp-down
s] 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.
. Ensure that the
s
4
t jog Time
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