154 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 Vector 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
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