Danfoss FC 300 Series User Manual

3-78 Ramp 4 S-ramp Ratio at Decel. End
Range: Function:
50 % * [Application
dependant]
Enter the proportion of the total ramp-
down time (3-72 Ramp 4 Ramp-down
Time) where the deceleration torque
decreases. The larger the percentage
value, the greater the jerk compen-
sation achieved, and thus the lower the
torque jerks in the application.
3.5.7 3-8* Other Ramps
3-80 Jog Ramp Time
Range: Function:
Application
dependent
*
[0.01 -
3600.00 s]
Enter the jog ramp time, i.e., the
acceleration/deceleration time
between 0 RPM and the rated motor
frequency n
s
. Ensure that the resultant
output current required for the given
jog ramp time does not exceed the
current limit in 4-18 Current Limit. The
jog ramp time starts upon activation of
a jog signal via the LCP, a selected
digital input, or the serial communi-
cation port. When jog state is disabled,
the normal ramping times are valid.
Par . 3 − 80 =
t
jog
s x n
s
RPM
Δ log speed
(
par . 3 − 19
)
RPM
3-81 Quick Stop Ramp Time
Range: Function:
Application
dependent
*
[0.01 -
3600.00 s]
Enter the quick stop ramp-down time,
i.e., the deceleration time from the
synchronous motor speed to 0 RPM.
Ensure that no resultant overvoltage
will arise in the inverter due to
regenerative operation of the motor
required to achieve the given ramp-
3-81 Quick Stop Ramp Time
Range: Function:
down time. Ensure also that the
generated current required to achieve
the given ramp-down time does not
exceed the current limit (set in
4-18 Current Limit). Quick stop is
activated by means of a signal on a
selected digital input, or via the serial
communication port.
Par . 3 − 81 =
t
Qstop
s x n
s
RPM
Δ jog ref
(
par . 3 − 19
)
RPM
3-82 Quick Stop Ramp Type
Option: 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.
[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 % * [Application
dependant]
Enter the proportion of the total ramp-
down time (par. 3-42) during which 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.
Parameter Descriptions FC 300 Programming Guide
3-40 MG.33.MA.22 - VLT
®
is a registered Danfoss trademark
3
3

Danfoss FC 300 Series Specifications

General

Brand	Danfoss
Model	FC 300 Series
Category	DC Drives
Language	English