Danfoss VLT AutomationDrive FC 300 Design Manual page 159

FC 300 Design Guide
3-61 Ramp 3 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.
3-62 Ramp 3 Ramp-down Time
Range:
0.01 - 3600.00 s
Function:
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
* default setting ( ) display text
How to Program
*
(par.
M,N
*
(par. 1-23) to 0 RPM.
M,N
[ ] value for use in communication via serial communication port
MG.33.B3.22 - VLT is a registered Danfoss trademark
par. 4-17). The value 0.00 corresponds to 0.01
s in speed mode.See ramp in par. 3-61.
3-65 Ramp 3 S-ramp Ratio at Accel. Start
Range:
1 - 99%
Function:
Set the period of the total ramp-up time (par. 3-61)
s
where the acceleration torque is growing smoothly.
A large percentage minimizes torque jerks.
3-66 Ramp 3 S-ramp Ratio at Accel. End
Range:
1 - 99%
Function:
Set the period of the total ramp-up time (par. 3-61)
where the acceleration torque is declining smoothly.
A large percentage minimizes torque jerks.
3-67 Ramp 3 S-ramp Ratio at Decel. Start
Range:
1 - 99%
Function:
Set the period of the total ramp-down time
(par. 3-62) where the deceleration torque
is growing smoothly. A large percentage
minimizes torque jerks.
3-68 Ramp 3 S-ramp Ratio at Decel. End
Range:
1 - 99%
Function:
Set the period of the total ramp-down time
(par. 3-62) where the deceleration torque
is declining smoothly. A large percentage
minimizes torque jerks.
s
3-7* Ramp 4
"
3-70 Ramp 4 Type
Option:
*
Linear
*
50%
*
50%
*
50%
*
50%
[0]
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