ABB ACS255 - Page 39

40
Parameters in the Short parameter mode
No.
Name/Value
Description
Def
13 ANALOG INPUTS
Anolog input signal offset
1301
ANALOG INPUT 1 OFFSET
Sets an offset, as a percentage of the full scale range of the input, which is applied to the
analog input signal
0.0%
-500…500 %
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%
20 LIMITS
Maximum frequency
2008
MAXIMUM FREQUENCY /
SPEED LIMIT
Maximum output frequency or motor speed limit – Hz or rpm.
If parameter 9908 MOTOR RATED SPEED >0, the value entered / displayed is in Rpm
60.0 Hz
2007…500.0 Hz
Maximum frequency
21 START/STOP
Stop mode of the motor
2102
STOP MODE
Selects the motor stop function
0 = Ramp to
stop
0 : Ramp To Stop
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
1 : Coast to Stop
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.
2 : Ramp To Stop
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.
3 : Coast to Stop
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.
22 ACCEL/DECEL
Acceleration and deceleration times
2202
ACCELERATION RAMP
TIME
Acceleration ramp time from 0 to base speed (Parameter 9907 MOTOR RATED FREQUENCY)
in seconds.
5.0 s
0.00…600.0 s
Time
2203
DECELERATION RAMP
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.
5.0 s
0.00…600.0 s
Time