ABB ACS255 User Manual page 48

Parameters in the Long parameter mode
Index Name/Selection
2102 STOP MODE
0 : RAMP TO STOP
1 : COAST TO STOP
2 : RAMP TO STOP
3 : COAST TO STOP
2103 V/F MODE MAGNETISING
PERIOD
0...5000 ms
2106 DC INJECTION BRAKING
VOLTAGE
, 0.0...25.0 %
2108 START MODE SELECT /
AUTOMATIC RESTART


 
to
2110 LOW FREQUENCY TORQUE
BOOST
0.0...100.0 %
2111 TORQUE BOOST
FREQUENCY LIMIT
0.0...50.0 %
2112 ZERO SPEED HOLDING
TIME
0.0...60.0 s
22 ACCEL/DECEL
2202 ACCELERATION RAMP
TIME
0.00...600.0 s
2203 DECELERATION RAMP
TIME
0.00...600.0 s
Description
Selects the motor stop function
When the enable signal is removed, the drive will ramp to stop, with the rate controlled by
parameter 2203 DECEL RAMP TIME as described above. In this mode, the drive brake
transistor is disabled
When the enable signal is removed, the drive output is immediately disabled, and the motor
will coast (freewheel) to stop. If the load can continue to rotate due to inertia, and the drive
may possibly be re-enabled while the motor is still rotating, the spin start function
(Parameter 2101 SPIN START ENABLE) should be enabled. In this mode, the drive brake
transistor is disabled.
When the enable signal is removed, the drive will ramp to stop, with the rate controlled by
Parameter 2203 DECEL RAMP TIME as described above. The ACS255 Brake chopper is also
enabled in this mode.
When the enable signal is removed, the drive output is immediately disabled, and the motor
will coast (freewheel) to stop. If the load can continue to rotate due to inertia, and the drive
may possibly be re-enabled while the motor is still rotating, the spin start function
(Parameter 2101 SPIN START ENABLE) should be enabled. The drive brake chopper is enabled
in this mode, however it will only activate when required during a change in the drive
frequency setpoint, and will not activate when stopping.
This parameter is used to set up a minimum delay time for the magnetising current control in
V/F mode when drive run signal is given. Too small a value may cause the drive to trip on
over-current if the acceleration ramp is very short.
Sets the amount of dc voltage as a percentage of the nominal voltage (9905 MOTOR RATED
VOLTAGE) that is applied to the motor when a stop command is received. This parameter is
enabled only for V/f control.
Defines the behaviour of the drive relating to the enable digital input and also configures the
Automatic Restart function.
Following Power on or reset, the drive will not start if Digital Input 1 remains closed. The
Input must be closed after a power on or reset to start the drive.
Following a Power On or Reset, the drive will automatically start if Digital Input 1 is closed.
Following a trip, the drive will make up to 5 attempts to restart at 20 second intervals. The
drive must be powered down to reset the
counted, and if the drive fails to start on the final attempt, the drive will fault with, and will
require the user to manually reset the fault
DANGER! " modes allow the drive to Auto-start, therefore the impact on
System/Personnel safety needs to be considered.
Boost current applied at start-up, as % of motor rated current (Parameter 9906 Motor Rated
Current). The drive provides a boost function that can inject some current into the motor at
low speed to help ensure the rotor alignment is maintained and to allow effective operation
of the motor at lower speeds. To implement low speed boost, run the drive at the lowest
frequency required by the application and increase boost levels to provide both required
torque and smooth operation.
Frequency range for applied boost current (Parameter 2110 LOW FREQUENCY TORQUE
BOOST) as a % of motor rated frequency (Parameter 9907 Motor Rated Frequency). This sets
the frequency cut-off point above which boost current is no longer applied to the motor.
Determines the time for which the drive output frequency is held at zero when stopping,
before the drive output is disabled
Acceleration and deceleration times
Acceleration ramp time from 0 to base speed (Parameter 9907 MOTOR RATED FREQUENCY)
in seconds.
Time
Deceleration ramp time from base speed (Parameter 9907 MOTOR RATED FREQUENCY) to
standstill in seconds. When set to zero, fastest possible ramp time without trip is activated.
Time
counter. The numbers of restart attempts are
49
Def
0 : RAMP TO
STOP
-
0.0

0.0 %
0.0 %
0.2 s
5.0 s
5.0 s