
Selection
number
Selection name
Description
0
OPEN
Ramp 1 Shape, Acceleration Time 1 and Deceleration Time 1
1
CLOSED
Ramp 2 Shape, Acceleration Time 2 and Deceleration Time 2
P3.4.2.5 RAMP 2 THRESHOLD FREQUENCY (ID 533)
Use this parameter to set the output frequency limit above which the Ramp 2 is used.
Use the function, for example, in applications for deep well pumps, where faster ramp times
are necessary when the pump starts or stops (operates below the minimum frequency).
Second ramp times are activated when the output frequency of the drive goes above the limit
specified by this parameter. To disable the function, set the value of the parameter to 0.
P3.4.5.2
P3.4.1.2
P3.4.1.3
P3.4.2.2
P3.4.2.3
f
out
t [s]
[Hz]
Fig. 51: Ramp 2 activation when the output frequency goes above the threshold level. (P.3.4.5.2 =
Ramp threshold freq., P3.4.1.2 = Acc. time 1, P3.4.2.2 = Acc. time 2, P3.4.1.3 =Dec. time 1, P3.4.2.3
= Dec. time 2)
10.5.3
START MAGNETISING
P3.4.3.1 START MAGNETISING CURRENT (ID 517)
Use this parameter to set the DC current that is fed into the motor at the start.
If the value of this parameter is set to 0, the Start Magnetising function is disabled.
P3.4.3.2 START MAGNETISING TIME (ID 516)
Use this parameter to set the time during which the DC current is fed to the motor before the
acceleration starts.
PARAMETER DESCRIPTIONS
VACON · 249
LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/
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Содержание 100 flow
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