ABB ACS350 Series, User Manual

Page: 183 / 314

Actual signals and parameters
183
21 START/STOP Start and stop modes of the motor
2101 START FUNCTION Selects the motor starting method. AUTO
AUTO The drive starts the motor instantly from zero frequency if parameter 9904
MOTOR CTRL MODE setting is SCALAR:FREQ. If flying start is required use
selection SCAN START.
If parameter
9904 MOTOR CTRL MODE value is VECTOR:SPEED/
VECTOR:TORQ, the drive pre-magnetises the motor with DC current before
the start. The pre-magnetising time is defined by parameter
2103 DC MAGN
TIME. See selection DC MAGN.
1
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.
If parameter 9904 MOTOR CTRL MODE value is VECTOR:SPEED/
VECTOR:TORQ, DC magnetising guarantees the highest possible
break-away torque when the pre-magnetising is set long enough.
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.
2
TORQ BOOST Torque boost should be selected if a high break-away torque is required.
Used only when parameter
9904 MOTOR CTRL MODE setting is
SCALAR:FREQ.
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.
4
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).
6
SCAN + BOOST Combines scanning start (starting to a rotating machine) and torque boost.
See selections SCANSTART and TORQ BOOST. If frequency identification
fails, torque boost is used.
Used only when parameter
9904 MOTOR CTRL MODE setting is
SCALAR:FREQ.
7
2102 STOP FUNCTION Selects the motor stop function. COAST
COAST Stop by cutting off the motor power supply. The motor coasts to a stop. 1
RAMP Stop along a ramp. See parameter group 22 ACCEL/DECEL . 2
Parameters – complete descriptions
Index Name/Selection Description Def, FbEq