Danfoss VLT AutomationDrive FC 300 Design Manual page 158

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FC 300 Design Guide
3-51 Ramp 2 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 must not reach the
torque limit (set in par. 4-16). The value 0.00
corresponds to 0.01 sec. in speed mode.
3-52 Ramp 2 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 must be no overvoltage in the inverter
because of 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. 3-51.
3-55 Ramp 2 S-ramp Ratio at Accel. Start
Range:
1 - 99%
default setting
( )
display text
*
158
How to Program
*
(par.
M,N
*
(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
Function:
Set the period of the total ramp-up time (par. 3-51)
where the acceleration torque is growing smoothly.
s
A large percentage minimizes torque jerks.
3-56 Ramp 2 S-ramp Ratio at Accel. End
Range:
1 - 99%
Function:
Set the period of the total ram-up time (par. 3-51)
where the acceleration torque is declining smoothly.
A large percentage minimizes torque jerks.
3-57 Ramp 2 S-ramp Ratio at Decel. Start
Range:
1 - 99%
Function:
Set the period of the total ramp-down time
(par. 3-52) where the deceleration torque
is growing smoothly. A large percentage
minimizes torque jerks.
3-58 Ramp 2 S-ramp Ratio at Decel. End
Range:
1 - 99%
Function:
Set the period of the total ramp-down time
(par. 3-52) where the deceleration torque
is declining smoothly. A large percentage
minimizes torque jerks.
s
3-6* Ramp 3
"
3-60 Ramp 3 Type
Option:
*
Linear
Function:
Selects the desired ramp type, depending on
requirements for acceleration/deceleration.
*
50%
*
50%
*
50%
[0]

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