ABB ACS560 Firmware Manual page 215

No. Name/Value
Automatic
Torque boost
Automatic+boost
Flying start
Flying start+boost
21.21 DC hold frequency
0.00...1000.00 Hz
21.22 Start delay
0.00...60.00 s
Description
The drive automatically selects the correct output frequency
to start a rotating motor. This is useful for flying starts: if the
motor is already rotating, the drive will start smoothly at the
current frequency.
Note: Cannot be used in multimotor systems.
The drive pre-magnetizes the motor before the start. The pre-
magnetizing time is defined by parameter
Magnetization time.
Torque boost is applied at start. Torque boost is stopped
when output frequency exceeds 20 Hz or when it is equal to
the reference value. See parameter
current.
This mode should selected if a high break-away torque is
required.
Note: This mode cannot be used to start into a rotating motor.
WARNING! The drive will start after the set pre-
magnetizing time has passed even if motor
magnetization is not completed. In applications where
a full break-away torque is essential, ensure that the constant
magnetizing time is long enough to allow generation of full
magnetization and torque.
Automatic start with torque boost.
Automatic start is performed first and the motor is
magnetized. If the speed is found to be zero, torque boost is
applied.
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 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
current.
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.
Defines the DC hold frequency, which is used instead of
parameter 21.09 DC hold speed
frequency mode. See parameter
and section DC hold (page 70).
DC hold frequency.
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
delay is shown.
Start delay can be used with all start modes.
Start delay
Parameters 215
21.02
21.26 Torque boost
99.06 Motor nominal
when the motor is in scalar
21.08 DC current control,
AFE9 Start
Def/FbEq16
2
3
4
5
6
5.00
1 = 1
0.00
1 = 1