Actual signals and parameters
84
21 START/STOP
Start and stop modes of the motor
2101 START FUNCTION Selects the motor starting method. 1 = AUTO
1 = AUTO Frequency reference ramps immediately from 0 Hz.
2 = DC MAGN The drive pre-magnetises the motor with DC current before the start.
The pre-magnetising time is defined by parameter 2103 DC MAGN TIME.
Note: Starting to a rotating machine is not possible when DC MAGN is
selected.
WARNING! The drive will start after the set pre-magnetising time has passed
even if the motor magnetisation is not completed. Ensure always in
applications where a full break-away torque is essential, that the constant
magnetising time is long enough to allow generation of full magnetisation and
torque.
4 = TORQ BOOST Torque boost should be selected if a high break-away torque is required.
The drive pre-magnetises the motor with DC current before the start.
The pre-magnetising 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 to a rotating machine is not possible when TORQ BOOST is
selected.
WARNING! The drive will start after the set pre-magnetising time has passed
although the motor magnetisation is not completed. Ensure always in
applications where a full break-away torque is essential, that the constant
magnetising time is long enough to allow generation of full magnetisation and
torque.
6 = SCAN START Frequency scanning flying start (starting to a rotating machine). Based on
frequency scanning (interval 2008 MAXIMUM FREQ...2007 MINIMUM
FREQ) to identify the frequency. If frequency identification fails, DC
magnetisation is used (see selection DC MAGN).
7 = SCAN+BOOST Combines frequency scanning flying start (starting to a rotating machine) and
torque boost. See selections SCAN START and TORQ BOOST. If frequency
identification fails, torque boost is used.
2102 STOP FUNCTION Selects the motor stop function. 1 = COAST
1 = COAST Stop by cutting off the motor power supply. The motor coasts to a stop.
2 = RAMP Stop along a ramp. See parameter group 22 ACCEL/DECEL.
2103 DC MAGN TIME Defines the pre-magnetising time. See parameter 2101 START FUNCTION.
After the start command, the drive automatically pre-magnetises the motor
the set time.
0.3
0.00…10.00 s Magnetising time. Set this value long enough to allow full motor
magnetisation. Too long time heats the motor excessively.
2104 DC HOLD CTL Activates the DC braking function. 0 = NOT SEL
0 = NOT SEL Inactive
2 = DC BRAKING DC current braking function active.
If parameter 2102 STOP FUNCTION is set to COAST, DC braking is applied
after the start command is removed.
If parameter 2102 STOP FUNCTION is set to RAMP, DC braking is applied
after the ramp.
Parameters in the Long Parameter mode
Index Name/Selection Description Def
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