ABB ACS280, Firmware Manual, Page: 143 / 430

Parameters 143
Flying start The drive automatically selects the correct output
frequency to start a rotating motor. If the motor is
already rotating, drive will start smoothly at the
current frequency. The mode will start the motor with
vector control and switch to scalar control on the fly
when the motor speed has been found. Compared to
the Automatic start mode, Flying start detects the
motor speed faster. Flying start requires more
accurate information about motor model. Therefore
standstill ID run is done automatically when the drive
is started for the first time after selecting Flying start.
Motor plate values should be accurate. Wrong plate
values may decrease the starting performance.
Note: Flying start cannot be used in multimotor
systems.
Note : During flying start, the drive will at first run in
vector control mode. This is why, when using flying
start, the drive nominal current setting must be in the
allowed range for vector control mode. See parameter
99.06
.
5
Flying start + boost Flying start with torque boost.
Flying start is performed first and the motor is
magnetized. If the speed is found to be zero, torque
boost is applied.
6
21.21 DC hold frequency Defines the DC hold frequency, which is used instead
of parameter
21.09 DC hold speed
when the operating
mode in use is
Scalar frequency mode
. See
parameters 19.01 Actual operation mode , 21.08 DC
current control
, and section
DC hold
on page
51
.
5.00 Hz
0.00…1000.00 Hz DC hold frequency. 1 = 1 Hz
21.22 Start delay
Defines the start delay. After the conditions for start
have been fulfilled, the drive waits until the delay has
elapsed and then starts the motor. During the delay,
warning
AFE9 Start delay
is shown.
Start delay can be used with all start modes.
0.00 s
0.00…60.00 s Start delay 1 = 1 s
21.23 Smooth start
Enables smooth start function. Smooth start function
restricts the motor current below the limit defined by
parameter
21.24 Smooth start current
when the
motor speed is below
21.25 Smooth start speed
.
Warning: Long run operation of smooth start at low
speed with high current may heat the motor.
Disabled
Disabled Smooth start disabled 0
Enabled always Smooth start function is always active when speed is
below limit.
1
Start only Smooth start function is only active after start while
the speed is below limit.
2
21.24 Smooth start current
Current applied to motor when the smooth start is
active.
50.0%
10.0... 100.0% Value in percent of the motor nominal current. 1=1%
21.25 Smooth start speed
Set the smooth start speed when the current is
applied.
10.0%
2.0... 100.0% Value in percent of the motor nominal speed. 1=1%
No. Name/Value Description Default
FbEq 16