Danfoss VLT AutomationDrive FC 301 Programming Manual page 69

Parameter Descriptions
3-75 Ramp 4 S-ramp Ratio at Accel. Start
Range: Function:
50 % [ 1 - Enter the proportion of the total ramp-up time
*
99 %] (3-71 Ramp 4 Ramp up Time) in which the
acceleration torque increases. The larger the
percentage value, the greater the jerk compen-
sation achieved, and thus the lower the torque
jerks in the application.
3-76 Ramp 4 S-ramp Ratio at Accel. End
Range: Function:
50 % [ 1 - Enter the proportion of the total ramp-up time
*
99 %] (3-71 Ramp 4 Ramp up Time) in which the
acceleration torque decreases. The larger the
percentage value, the greater the jerk compen-
sation achieved, and thus the lower the torque
jerks in the application.
3-77 Ramp 4 S-ramp Ratio at Decel. Start
Range: Function:
50 % [ 1 - Enter the proportion of the total ramp-down
*
99 %] time (3-72 Ramp 4 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.
3-78 Ramp 4 S-ramp Ratio at Decel. End
Range: Function:
50 % [ 1 - Enter the proportion of the total ramp-down
*
99 %] 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:
Size [0.01 Enter the jog ramp time, i.e. the acceleration/
related - 3600 deceleration time between 0 RPM and the
*
s] rated motor frequency n
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 communication port. When jog
state is disabled then the normal ramping
times are valid.
®
VLT AutomationDrive FC 301/302 Programming Guide
Illustration 3.27 Jog Ramp Time
Par . 3 − 80 =
3-81 Quick Stop Ramp Time
Range:
Size
related
. Ensure that the
s
Illustration 3.28 Quick Stop Ramp Time
MG33MH02 - Rev. 2013-09-30
RPM
P 4-13 RPM
high limit
P 1-25
Motor speed
P 3-19
Jog speed
P 4-11 RPM
low limit
t jog
P 3-80
Ramp up
(acc)
t jog s x n s RPM
Δ jog speed ( par . 3 − 19) RPM
Function:
[0.01 Enter the quick–stop ramp-down time, i.e.
- 3600 the deceleration time from the synchronous
*
s] 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
3
t jog Time
P 3-80
Ramp down
(dec)
Time
P 3-81
Qramp
Qstop
67
3