ABB ACS380 Series - Page 159

Parameters 159
Automatic The drive automatically selects the correct output
frequency to start a rotating motor. This is useful for flying
starts: if the motor is already rotating, the drive will start
smoothly at the current frequency.
Note: Cannot be used in multimotor systems.
2
Torque boost Torque boost is applied at start, ending when output
frequency exceeds 20 Hz or when output frequency is
equal to reference.
3
Automatic + boost If the Flystart routine does not detect rotating motor,
torque boost is applied.
4
21.21 DC hold frequency Defines the DC hold frequency, which is used instead of
parameter 21.09 DC hold speed when the operating mode
in use is Scalar frequency mode. See parameters 19.01
Actual operation mode, 21.08 DC current control, and
section DC hold on page 72.
5.00 Hz
0.00…1000.00 Hz DC hold frequency. 1 = 1 Hz
21.22 Start delay Defines the start delay. After the conditions for start have
been fulfilled, the drive waits until the delay has elapsed
and then starts the motor. During the delay, warning AFE9
Start delay is shown.
Start delay can be used with all start modes.
0.00 s
0.00…60.00 s Start delay 1 = 1 s
21.23 Smooth start Enables smooth start function. Smooth start function
restricts the motor current below the limit defined by
parameter 21.24 Smooth start current when the motor
speed is below 21.25 Smooth start speed.
Disabled
Disabled Smooth start disabled 0
Enabled always Smooth start function is always active when speed is
below limit.
1
Start only Smooth start function is only active after start while the
speed is below limit.
2
21.24 Smooth start current Current applied to motor when the smooth start is active. 50.0%
10... 100% 1=1%
21.25 Smooth start speed Set the smooth start speed when the current is applied. 10.0%
2... 100% 1=1%
21.26 Torque boost current Defines the maximum supplied current to motor during
‘Torque boost’ –starting mode. Parameter value is in
percent of the motor nominal current. Nominal value of the
parameter is 100.0%. ‘Torque boost’ –starting mode can
be used only when motor control mode is ‘Scalar’. Torque
boost is only applied at start, ending when output
frequency exceeds 20 Hz or when output frequency is
equal to reference.
100.0%
15... 300% 0.01 = 1%
No. Name/Value Description Default
FbEq 16