Danfoss FC 300 Programming Manual page 60

Parameter Descriptions
3 3
Par
. 3 − 80 =
3-81 Quick Stop Ramp Time
Range:
Applica- [0.01 -
tion 3600.00 s]
depend-
ent
*
Par
. 3 − 81 =
60
FC 300 Programming Guide
t s x n RPM
jog s
log speed ( par . 3 − 19 )
Δ
Function:
Enter the quick–stop ramp-down time, i.e.
the deceleration time from the synchro-
nous 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 par. 4-18 Current
Limit). Quick-stop is activated by means of
a signal on a selected digital input, or via
the serial communication port.
t s x n RPM
Qstop s
jog ref ( par . 3 − 19 ) RPM
Δ
MG.33.M9.02 - VLT
3-82 Quick Stop Ramp Type
Option:
[0] Linear
*
[1] S-ramp Const
Jerk
[2] S-ramp Const
Time
3-83 Quick Stop S-ramp Ratio at Decel. Start
Range:
RPM
50 % [Application
*
dependant]
3-84 Quick Stop S-ramp Ratio at Decel. End
Range:
50 % [Application
*
dependant]
®
is a registered Danfoss trademark
Function:
Select the ramp type, depending on
requirements for acceleration and decelera-
tion. A linear ramp will give constant
acceleration during ramping. An S-ramp will
give non-linear acceleration, compensating
for jerk in the application.
Function:
Enter the proportion of the total ramp-
down time (par. 3-42) where the deceler-
ation 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 (par. 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.