Vacon NX Series Applications Manual page 282

VACON · 282
Table 152: Selections for parameter ID505
Selection
number
Ramp
0
Flying start
1
Conditional flying start
2
506 STOP FUNCTION (2.4.7)
Use this parameter to select the type of the stop function.
9
Selection name
The AC drive starts from 0 Hz and accelerates to the set ref-
erence frequency within the set acceleration time. (Load
inertia or starting friction may cause prolonged acceleration
times).
The AC drive is able to start into a running motor by applying
small current pulses to motor and searching for the fre-
quency corresponding to the speed the motor is running at.
Searching starts from the maximum frequency towards the
actual frequency until the correct value is detected. There-
after, the output frequency will be increased/ decreased to
the set reference value according to the set acceleration/
deceleration parameters.
Use this mode if the motor is coasting when the start com-
mand is given. With the flying start it is possible to start the
motor from actual speed without forcing the speed to zero
before ramping to reference.
With this mode it is possible to disconnect and connect the
motor from the AC drive even when the Start command is
active. On re-connecting the motor, the drive will operate as
described in selection 1.
LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/
PARAMETER DESCRIPTIONS
Description