ABB ACQ80, Firmware Manual

Page: 124 / 390

124 Parameters
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
0…10000 ms Constant DC magnetizing time. 1 = 1
21.03 Stop mode
Selects the way the motor is stopped when a
stop command is received.
Coast
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 that it is safe to stop the drive
by coasting.
0
Ramp Stop along the active deceleration ramp. See
parameter group
23 Speed reference ramp
on
page
129
or
28 Frequency reference chain
on
page
137
.
1
No. Name/Value Description Def/
FbEq16
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