Danfoss VLT FC 51 Series User Manual

3-40 Ramp1 Type
Option: Function:
[0]
*
Linear Constant acceleration/deceleration.
[2] S-ramp Smooth jerk compensated acceleration/deceleration.
3-41 Ramp1 Ramp-up Time
Range: Function:
3.00 s
*
[0.05 - 3600 s ] Enter ramp-up time from 0 Hz to rated motor frequency (f
M,N
)
set in par. 1-23.
Choose a ramp-up time ensuring that torque limit is not excee-
ded, see par. 4-16.
3-42 Ramp1 Ramp-down Time
Range: Function:
3.00
*
[0.05 - 3600 s] Enter ramp down time from rated motor frequency (f
M,N
) in par.
1-23 to 0 Hz.
Choose a ramp down time that does not cause over-voltage in
inverter due to regenerative operation of motor. Furthermore,
regenerative torque must not exceed limit set in par. 4-17.
4.4.5. 3-5* Ramp2
See par. 3-4* for a description of ramp types.
NB!
Ramp2 - alternative ramp times:
Changing from Ramp1 to Ramp2 is done via the digital input. See par. 5-1*, selection
[34].
3-50 Ramp2 Type
Option: Function:
[0]
*
Linear Constant acceleration/deceleration.
[2] S-ramp Smooth jerk compensated acceleration/deceleration.
3-51 Ramp2 Ramp-up Time
Range: Function:
3.000
*
[0.100 - 3600 s] Enter ramp-up time from 0 Hz to rated motor frequency (f
M,N
)
set in par. 1-23.
Choose a ramp-up time ensuring that output current does not
exceed current limit set in par. 4-18 during ramping.
3-52 Ramp2 Ramp-down Time
Range: Function:
3.000 s [0.100 - 3600 s] Enter ramp down time from rated motor frequency (f
M,N
) in par.
1-23 to 0 Hz.
4. Parameter Descriptions VLT Micro Drive FC 51
34 MG.02.C2.02 - VLT
®
is a registered Danfoss trademark
4

Danfoss VLT FC 51 Series Specifications

General

Brand	Danfoss
Model	VLT FC 51 Series
Category	DC Drives
Language	English