Danfoss VLT AutomationDrive FC 300 Design Manual page 160

FC 300 Design Guide
Function:
Selects the desired ramp type, depending on
requirements for acceleration/deceleration.
3-71 Ramp 4 Ramp-up Time
Range:
0.01 - 3600.00 s
Function:
The ramp-up time is the acceleration time from
0 RPM to the rated motor speed n
1-23). The output current cannot reach the
torque limit (set in par. 4-16). The value 0.00
corresponds to 0.01 s in speed mode.
3-72 Ramp 4 Ramp-down Time
Range:
0.01 - 3600.00 s
default setting ( ) display text
*
160
How to Program
The ramp-down time is the deceleration time from
the rated motor speed n
There can be no overvoltage in the inverter due to
regenerative operation of the motor. Nor can the
generated current reach the torque limit (set in
par. 4-17). The value 0.00 corresponds to 0.01
s in speed mode. See ramp in par. 3-71.
Set the period of the total ramp-up time (par. 3-71)
*
s
where the acceleration torque is growing smoothly.
A large percentage minimizes torque jerks.
(par.
M,N
Set the period of the total ramp-up time (par. 3-71)
where the acceleration torque is declining smoothly.
A large percentage minimizes torque jerks.
Set the period of the total ramp-down time
(par. 3-72) where the deceleration torque
is growing smoothly. A large percentage
minimizes torque jerks.
Set the period of the total ramp-down time
(par. 3-72) where the deceleration torque
*
s
[ ] value for use in communication via serial communication port
MG.33.B3.22 - VLT is a registered Danfoss trademark
Function:
M,N
3-75 Ramp 4 S-ramp Ratio at Accel. Start
Range:
1 - 99%
Function:
3-76 Ramp 4 S-ramp Ratio at Accel. End
Range:
1 - 99%
Function:
3-77 Ramp 4 S-ramp Ratio at Decel. Start
Range:
1 - 99%
Function:
3-78 Ramp 4 S-ramp Ratio at Decel. End
Range:
1 - 99%
Function:
(par. 1-23) to 0 RPM.
*
50%
*
50%
*
50%
*
50%