Danfoss VLT AutomationDrive FC 361 Programming Guide

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.
4.4.7 3-8* Other Ramps
3-80 Jog Ramp Time
Range: Function:
Size
related*
[0.01 - 3600
s]
Enter the jog ramp time, that is the
acceleration/deceleration time
between 0 RPM and the rated
motor frequency n
s
. Ensure that 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.
130BA070.10
Time
P 3-80
RPM
P 4-13 RPM
high limit
P 1-25
Motor speed
Jog speed
P 3-19
P 3-80
Ramp up
(acc)
Ramp down
(dec)
t jog t jog
P 4-11 RPM
low limit
Illustration 4.20 Jog Ramp Time
Par . 3 − 80 = 
t
jog
 s xn
s
 RPM
Δ jogspeed par . 3 − 19  RPM
3-81 Quick Stop Ramp Time
Range: Function:
Size
related*
[0.01 - 3600
s]
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.
Parameter Descriptions Programming Guide
MG06J202 Danfoss A/S © 03/2019 All rights reserved. 59
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Danfoss VLT AutomationDrive FC 361 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 361
Category	DC Drives
Language	English