Danfoss VLT AutomationDrive FC 300 Programming Manual page 62

Parameter Descriptions
3-71 Ramp 4 Ramp up Time
Range: Function:
Application [Application Enter the ramp-up time, i.e. the
dependent dependant] acceleration time from 0 RPM to the
*
rated motor speed n
up time such that the output current
does not exceed the current limit in
4-18 Current Limit during ramping. The
value 0.00 corresponds to 0.01 sec. in
speed mode. See ramp-down time in
3-72 Ramp 4 Ramp Down Time.
Par . 3 − 71 =
3-72 Ramp 4 Ramp Down Time
Range: Function:
Application Enter the ramp-down time, i.e. the
dependent [Application deceleration time from the rated
*
dependant] motor speed n
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 4-18 Current Limit. The value 0.00
corresponds to 0.01 sec. in speed
mode. See ramp-up time in 3-71 Ramp
4 Ramp up Time.
Par . 3 − 72 =
3-75 Ramp 4 S-ramp Ratio at Accel. Start
Range: Function:
50 % [Application Enter the proportion of the total ramp-
*
dependant] up time (3-71 Ramp 4 Ramp up Time) in
which the acceleration torque
increases. The larger the percentage
value, the greater the jerk compen-
sation achieved, and thus the lower the
torque jerks in the application.
FC 300 Programming Guide
3-76 Ramp 4 S-ramp Ratio at Accel. End
Range:
50 %
. Choose a ramp-
s
3-77 Ramp 4 S-ramp Ratio at Decel. Start
Range:
t acc s x n s RPM
ref RPM
50 %
to 0 RPM. Choose a
s
3-78 Ramp 4 S-ramp Ratio at Decel. End
Range:
50 %
t dec s x n s RPM
ref RPM
3.5.7 3-8* Other Ramps
3-80 Jog Ramp Time
Range:
Application
dependent
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MG.33.MB.02 - VLT is a registered Danfoss trademark
Function:
[Application Enter the proportion of the total ramp-
*
dependant] up time (3-71 Ramp 4 Ramp up Time) in
which the acceleration torque
decreases. The larger the percentage
value, the greater the jerk compen-
sation achieved, and thus the lower the
torque jerks in the application.
Function:
[Application Enter the proportion of the total ramp-
*
dependant] down time (3-72 Ramp 4 Ramp Down
Time) where the deceleration torque
increases. The larger the percentage
value, the greater the jerk compen-
sation achieved, and thus the lower the
torque jerks in the application.
Function:
[Application Enter the proportion of the total ramp-
*
dependant] down time (3-72 Ramp 4 Ramp Down
Time) where the deceleration torque
decreases. The larger the percentage
value, the greater the jerk compen-
sation achieved, and thus the lower the
torque jerks in the application.
Function:
[0.01 - Enter the jog ramp time, i.e. the
3600.00 s] acceleration/deceleration time
*
between 0 RPM and the rated motor
frequency n
output current required for the given
jog ramp time does not exceed the
current limit in 4-18 Current Limit. The
jog ramp time starts upon activation of
a jog signal via the LCP, a selected
digital input, or the serial communi-
cation port. When jog state is disabled
then the normal ramping times are
valid.
. Ensure that the resultant
s
61
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