ABB ACS880 - Page 259

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
5.0 s / real32The motor can be automatically started after a short supply
power failure using the automatic restart function. See
section Automatic restart (page 82).
When this parameter is set to 0.0 seconds, automatic
restarting is disabled. Otherwise, the parameter defines
the maximum duration of the power failure after which
restarting is attempted. Note that this time also includes
the DC precharging delay.
WARNING!
The function restarts the drive automatically and
continues operation after a supply break. Make
sure that no dangerous situations can occur.
Auto restart time21.18
1 = 1 s / 10 = 1 s0.0 s = Automatic restarting disabled.
0.1 … 5.0 s = Maximum power failure duration.
0.0 ... 10.0 s
Normal / uint16Selects the motor start function for the scalar motor control
mode, ie. when 99.4 Motor control mode is set to Scalar.
Note:
• The start function for the DTC motor control mode is
selected by parameter 21.1 Start mode.
•
With permanent magnet motors, Automatic start mode
must be used.
See also section DC magnetization (page 68).
Scalar start mode21.19
0Immediate start from zero speed.Normal
1The drive pre-magnetizes the motor before start. The
premagnetizing time is defined by parameter 21.2
Magnetization time. This mode should be selected if
constant pre-magnetizing time is required (e.g. if the motor
start must be synchronized with the release of a mechanical
brake). This setting also guarantees the highest possible
break-away torque when the pre-magnetizing time is set
long enough.
Note: This mode cannot be used to start into a rotating
motor.
WARNING!
The drive will start after the set magnetizing time
has passed even if motor magnetization is not
completed. In applications where a full break-away
torque is essential, ensure that the constant
magnetizing time is long enough to allow
generation of full magnetization and torque.
Const time
2This setting should be used
• in applications where flying starts (ie. starting into a
rotating motor) are required, and
• with permanent magnet motors.
Automatic
Parameters 259