ABB ACS255 User Manual page 39

40
Parameters in the Short parameter mode
No. Name/Value
13 ANALOG INPUTS
1301 ANALOG INPUT 1 OFFSET
-500...500 %
20 LIMITS
2008 MAXIMUM FREQUENCY /
SPEED LIMIT
2007...500.0 Hz
21 START/STOP
2102 STOP MODE
0 : Ramp To Stop
1 : Coast to Stop
2 : Ramp To Stop
3 : Coast to Stop
22 ACCEL/DECEL
2202 ACCELERATION RAMP
TIME
0.00...600.0 s
2203 DECELERATION RAMP
TIME
0.00...600.0 s
Description
Anolog input signal offset
Sets an offset, as a percentage of the full scale range of the input, which is applied to the
analog input signal
Value in percent of the full scale range of the input
Example: If the analog input signal format is 0-10V, offset = 20% .
An analog input signal level of 7 Volts gives the following result :-
Analog input level (%) = 7/10 = 70%
Result = 70-20 (%) = 50%
Maximum frequency
Maximum output frequency or motor speed limit – Hz or rpm.
If parameter 9908 MOTOR RATED SPEED >0, the value entered / displayed is in Rpm
Maximum frequency
Stop mode of the motor
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 whilst 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 whilst 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.
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
Def
0.0%
60.0 Hz
0 = Ramp to
stop
5.0 s
5.0 s