21 Start/Stop - ABB ACS350 User Manual

Parameters – complete descriptions
Index Name/Selection

21 START/STOP

2101 START FUNCTION
AUTO
DC MAGN
TORQ BOOST
SCAN START
SCAN + BOOST
2102 STOP FUNCTION
COAST
RAMP
Description
Start and stop modes of the motor
Selects the motor starting method.
The drive starts the motor instantly from zero frequency if parameter
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
TIME. See selection DC MAGN.
The drive pre-magnetises the motor with DC current before the start. The
pre-magnetising time is defined by parameter
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.
Torque boost should be selected if a high break-away torque is required.
Used only when parameter
SCALAR:FREQ.
The drive pre-magnetises the motor with DC current before the start. The
pre-magnetising time is defined by parameter
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.
Frequency scanning flying start (starting to a rotating machine). Based on
frequency scanning (interval
FREQ) to identify the frequency. If frequency identification fails, DC
magnetisation is used (see selection DC MAGN).
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
SCALAR:FREQ.
Selects the motor stop function.
Stop by cutting off the motor power supply. The motor coasts to a stop.
Stop along a ramp. See parameter group
2103 DC MAGN TIME.
9904 MOTOR CTRL MODE setting is
2103 DC MAGN TIME.
2008 MAXIMUM FREQ...2007
9904 MOTOR CTRL MODE setting is
22 ACCEL/DECEL.
Def, FbEq
AUTO
9904 1
2103 DC MAGN
2
4
6
MINIMUM
7
COAST
1
2
Actual signals and parameters
183