Danfoss VLT AutomationDrive FC 300 Design Manual page 157

FC 300 Design Guide
Function:
The ramp-up time is the acceleration time from 0
RPM to the rated motor speed nM,N (par. 1-23),
provided that the output current does not reach
the torque limit (set in par. 4-16). The value 0.00
corresponds to 0.01 s in speed mode.
3-42 Ramp 1 Ramp-down Time
Range:
0.01 - 3600.00 s
Function:
The ramp-down time is the deceleration time from
the rated motor speed n
provided that there is no over-voltage in the inverter
due to regenerative operation of the motor, or if the
generated current reaches the torque limit (set in
par. 4-17). The value 0.00 corresponds to 0.01 s in
speed mode. See ramp-up time in par. 3-41
3-45 Ramp 1 S-ramp Ratio at Accel. Start
Range:
1 - 99%
Function:
Set the period of the total ramp-up time (par. 3-41)
where the acceleration torque is growing smoothly.
A large percentage minimizes torque jerks.
* default setting ( ) display text
How to Program
*
ExpressionLimits
(par. 1-23) to 0 RPM,
M,N
*
50%
[ ] value for use in communication via serial communication port
MG.33.B3.22 - VLT is a registered Danfoss trademark
3-46 Ramp 1 S-ramp Ratio at Accel. End
Range:
1 - 99%
Function:
Set the period of the total ramp-up time (par. 3-41)
where the acceleration torque is declining smoothly.
A large percentage minimizes torque jerks.
3-47 Ramp 1 S-ramp Ratio at Decel. Start
Range:
1 - 99%
Function:
Set the period of the total ramp-down time
(par. 3-42) where the deceleration torque
is growing smoothly. A large percentage
minimizes torque jerks.
3-48 Ramp 1 S-ramp Ratio at Decel. End
Range:
1 - 99%
Function:
Set the period of the total ramp-down time
(par. 3-42) where the deceleration torque
is declining smoothly. A large percentage
minimizes torque jerks.
3-5* Ramp 2
"
3-50 Ramp 2 Type
Option:
*
Linear
Function:
Selects the desired ramp type, depending on
requirements for acceleration/deceleration.
*
50%
*
50%
*
50%
[0]
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