ABB ACS280, Firmware Manual, Page: 137 / 430

Parameters 137
Automatic Automatic start guarantees optimal motor start in
most cases. It includes the flying start function
(starting into a rotating motor) and the automatic
restart function. The drive motor control program
identifies the flux as well as the mechanical state of
the motor and starts the motor instantly under all
conditions.
Note: If parameter
99.04 Motor control mode
is set to
Scalar , no flying start or automatic restart is possible
unless parameter
21.19 Scalar start mode
is set to
Automatic
.
2
21.02 Magnetization time
Defines the pre-magnetization time when
• parameter
21.01 Start mode
is set to
Const time
(in
vector motor control mode), or
• parameter
21.19 Scalar start mode
is set to
Const
time
(in scalar motor control mode).
After the start command, the drive automatically
premagnetizes the motor for the set time. To ensure
full magnetizing, set this parameter to the same value
as, or higher than, the rotor time constant. If not
known, use the rule-of-thumb value given in the table
below:
Note: This parameter cannot be changed while the
drive is running.
500 ms
0…10000 ms Constant DC magnetizing time. 1 = 1 ms
21.03 Stop mode
Selects the way the motor is stopped when a stop
command is received.
Additional braking is possible by selecting flux
braking (see parameter 97.05 Flux braking ).
Ramp
Coast Stop by switching off the output semiconductors of
the drive. The motor coasts to a stop.
WARNING! If a mechanical brake is used, make
sure it is safe to stop the drive by coasting.
0
Ramp Stop along the active deceleration ramp. See
parameter group
23 Speed reference ramp
or
28
Frequency reference chain
.
1
Torque limit Stop according to torque limits (parameters
30.19
and
30.20
). This mode is only possible in vector
motor control mode.
2
No. Name/Value Description Default
FbEq 16
Motor rated power Constant magnetizing time
< 1 kW > 50 to 100 ms
1 to 10 kW > 100 to 200 ms
10 to 200 kW > 200 to 1000 ms
200 to 1000 kW > 1000 to 2000 ms