Danfoss VLT AutomationDrive FC 300 Programming Guide

3-51 Ramp 2 Ramp up Time
Range: Function:
Application
dependent*
[Application dependant] Enter the ramp-up time, i.e. the acceleration time from 0 RPM to the rated motor speed n
s
. Choose
a ramp-up time such that the output current does not exceed the current limit in par. 4-18
Current
Limit
during ramping. The value 0.00 corresponds to 0.01 sec. in speed mode. See ramp-down time
in par. 3-52
Ramp 2 Ramp down Time .
Par . 3 − 51 =
t
acc
s x n
s
RPM
ref RPM
3-52 Ramp 2 Ramp down Time
Range: Function:
Application
dependent*
[Application dependant] Enter the ramp-down time, i.e. the deceleration time from the rated motor speed n
s
to 0 RPM.
Choose a ramp-down time such that no over-voltage arises in the inverter due to regenerative
operation of the motor, and such that the generated current does not exceed the current limit set
in par. 4-18
Current Limit . The value 0.00 corresponds to 0.01 s in speed mode. See ramp-up time
in par. 3-51
Ramp 2 Ramp up Time .
Par . 3 − 52 =
t
dec
s x n
s
RPM
ref RPM
3-55 Ramp 2 S-ramp Ratio at Accel. Start
Range: Function:
50 %* [Application dependant] Enter the proportion of the total ramp-up time (par. 3-51 Ramp 2 Ramp up Time ) in which the
acceleration torque increases. The larger the percentage value, the greater the jerk compensation
achieved, and thus the lower the torque jerks in the application.
3-56 Ramp 2 S-ramp Ratio at Accel. End
Range: Function:
50 %* [Application dependant] Enter the proportion of the total ramp-up time (par. 3-51 Ramp 2 Ramp up Time ) in which the
acceleration torque decreases. The larger the percentage value, the greater the jerk compensation
achieved, and thus the lower the torque jerks in the application.
3-57 Ramp 2 S-ramp Ratio at Decel. Start
Range: Function:
50 %* [Application dependant] Enter the proportion of the total ramp-down time (par. 3-52 Ramp 2 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.
3-58 Ramp 2 S-ramp Ratio at Decel. End
Range: Function:
50 %* [Application dependant] Enter the proportion of the total ramp-down time (par. 3-52 Ramp 2 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.
3.5.6 3-6* Ramp 3
Configure ramp parameters, see 3-4*.
3-60 Ramp 3 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, com-
pensating for jerk in the application.
[0] * Linear
FC 300 Programming Guide 3 Parameter descriptions
MG.33.M8.02 - VLT
®
is a registered Danfoss trademark 79
3

Danfoss VLT AutomationDrive FC 300 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300
Category	DC Drives
Language	English