Actual signals and parameters 201
TORQ BOOST Torque boost should be selected if a high break-away
torque is required.
The drive pre-magnetizes the motor with DC current before
the start. The pre-magnetizing time is defined by parameter
2103 DC MAGN 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 2110 TORQ BOOST
CURR.
Note: Starting the drive connected to a rotating motor is not
possible when TORQ BOOST is selected.
WARNING! The drive starts after the set pre-
magnetizing time has passed although the motor
magnetization is not completed. In applications where a full
break-away torque is essential, always ensure that the
constant magnetizing time is long enough to allow
generation of full magnetization and torque.
4
SCAN START Frequency scanning flying start (starting the drive
connected to a rotating motor). Based on frequency
scanning (interval 2008 MAXIMUM FREQ…2007 MINIMUM
FREQ) to identify the frequency. If frequency identification
fails, DC magnetization is used (see selection DC MAGN).
6
SCAN +
BOOST
Combines scanning start (starting the drive connected to a
rotating motor) and torque boost. See selections SCAN
START and TORQ BOOST. If frequency identification fails,
torque boost is used.
7
2102 STOP
FUNCTION
Selects the motor stop function. COAST
COAST Stop by cutting off the motor power supply. The motor
coasts to stop.
1
RAMP Stop along a ramp. See parameter group 22
ACCEL/DECEL.
2
2103 DC MAGN
TIME
Defines the pre-magnetizing time. See parameter 2101
START FUNCTION. After the start command, the drive
automatically pre-magnetizes the motor for the defined time.
0.30 s
0.00…10.00 s Magnetizing time. Set this value long enough to allow full
motor magnetization. Too long a time heats the motor
excessively.
1 = 0.01 s
2104 DC HOLD CTL Enables motor heating function in which direct current (DC)
is injected into the motor to keep it warm in low
temperatures.
The amount of current to use for motor heating is defined in
parameter 2114 HEATING CURR REF [%].
NOT SEL
NOT SEL Motor heating is disabled 0
MOT HEATING Motor heating is enabled and can be activated by parameter
2115. When motor heating is active, drive shows the alarm
20381) MOTOR HEATING.
3
All parameters
No. Name/Value Description Def/FbEq
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