Danfoss VLT AutomationDrive FC 300 Programming Manual page 63

Parameter Descriptions
RPM
P 4-13 RPM
high limit
P 1-25
3 3
Motor speed
P 3-19
Jog speed
P 4-11 RPM
low limit
Par . 3 − 80 =
Δ
3-81 Quick Stop Ramp Time
Range:
Application
dependent
*
Par . 3 − 81 =
Δ
62
t jog t jog
P 3-80 P 3-80
Ramp up Ramp down
(acc) (dec)
t jog s x n s RPM
log speed ( par . 3 − 19 ) RPM
Function:
[0.01 - Enter the quick–stop ramp-down time,
3600.00 s] i.e. the deceleration time from the
synchronous motor speed to 0 RPM.
Ensure that no resultant over-voltage
will arise 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
4-18 Current Limit). Quick-stop is
activated by means of a signal on a
selected digital input, or via the serial
communication port.
RPM
P 4-13 RPM
high limit
Reference
P 1-25
Motor speed
P 4-11 RPM
low limit
P 3-81
Qramp
Qstop
t Qstop s x n s RPM
jog ref ( par . 3 − 19 ) RPM
MG.33.MB.02 - VLT
FC 300 Programming Guide
3-82 Quick Stop Ramp Type
Option:
[0] Linear
*
Time
[1] S-ramp Const
Jerk
[2] S-ramp Const
Time
3-83 Quick Stop S-ramp Ratio at Decel. Start
Range:
50 %
*
dependant]
3-84 Quick Stop S-ramp Ratio at Decel. End
Range:
50 %
*
dependant]
Time
®
is a registered Danfoss trademark
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:
[Application 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 compen-
sation achieved, and thus the lower the
torque jerks in the application.
Function:
[Application Enter the proportion of the total ramp-
down time (3-42 Ramp 1 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.