par.3 − 41 = tacc × nnorm par.1 − 25
ref rpm
s
3-42 Ramp 1 Ramp Down Time
Range:
Function:
Size
related
*
[ 1.00 -
3600.00 s]
Enter the ramp-down time, i.e. the
deceleration time from
to 0 RPM. Choose a
ramp-down time such that no over-
voltage arises in the inverter due to
regenerative operation of the motor,
and such that the generated current
does not exceed the current limit set in
. See ramp-up time in
.
par.3 − 42 = tdec × nnorm
par.1 − 25
ref rpm
s
3-45 Ramp 1 S-ramp Ratio at Accel. Start
Range:
Function:
50 %
*
[1 - 99. %] Enter the proportion of the total ramp-up
time (
3-41 Ramp 1 Ramp up Time
) in which
the acceleration torque increases. The larger
the percentage value, the greater the jerk
compensation achieved, and thus the lower
the torque jerks occurring in the application.
3-46 Ramp 1 S-ramp Ratio at Accel. End
Range:
Function:
50 %
*
[1 - 99. %] Enter the proportion of the total ramp-up
time (
3-41 Ramp 1 Ramp up Time
) in which
the acceleration torque decreases. The larger
the percentage value, the greater the jerk
compensation achieved, and thus the lower
the torque jerks in the application.
3-47 Ramp 1 S-ramp Ratio at Decel. Start
Range:
Function:
50 %
*
[1 - 99. %] Enter the proportion of the total ramp-down
time (
3-42 Ramp 1 Ramp Down Time
) where
the deceleration torque increases. The larger
the percentage value, the greater the jerk
compensation achieved, and thus the lower
the torque jerks in the application.
3-48 Ramp 1 S-ramp Ratio at Decel. End
Range:
Function:
50 %
*
[1 - 99. %] Enter the proportion of the total ramp-down
time (
3-42 Ramp 1 Ramp Down Time
) where
the deceleration torque decreases. The larger
the percentage value, the greater the jerk
compensation achieved, and thus the lower
the torque jerks in the application.
3.5.4 3-5* Ramp 2
Choosing ramp parameters, see parameter group 3-4*.
3-51 Ramp 2 Ramp Up Time
Range:
Function:
Size
related
*
[ 1.00 -
3600.00
s]
Enter the ramp-up time, i.e. the acceleration
time from 0 RPM to
. Choose a ramp-up time such that the
output current does not exceed the current
limit in
during ramping.
See ramp-down time in
.
par. 3 − 51 = tacc × nnorm par. 1 − 25
ref rpm
s
3-52 Ramp 2 Ramp Down Time
Range:
Function:
Size
related
*
[ 1.00 -
3600.00
s]
Enter the ramp-down time, i.e. the
deceleration time from
to 0 RPM. Choose a ramp-down time
such that no over-voltage arises in the
inverter due to regenerative operation of the
motor, and such that the generated current
does not exceed the current limit set in
. See ramp-up time in
.
par.3 − 52 = tdec × nnorm par. 1 − 25
ref rpm
s
3-55 Ramp 2 S-ramp Ratio at Accel. Start
Range:
Function:
50 %
*
[1 - 99. %] Enter the proportion of the total ramp-up
time (
3-51 Ramp 2 Ramp up Time
) in which
the acceleration torque increases. The larger
the percentage value, the greater the jerk
compensation achieved, and thus the lower
the torque jerks in the application.
3-56 Ramp 2 S-ramp Ratio at Accel. End
Range:
Function:
50 %
*
[1 - 99. %] Enter the proportion of the total ramp-up
time (
3-51 Ramp 2 Ramp up Time
) in which
the acceleration torque decreases. The larger
the percentage value, the greater the jerk
compensation achieved, and thus the lower
the torque jerks in the application.
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CC.02 - VLT
®
is a registered Danfoss trademark
55
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