ABB ACS880 Firmware Manual page 298

298 Parameters
No. Name / Range /
Selection
21.18 Auto restart time
0.0 ... 10.0 s
21.19 Scalar start mode
Normal
Const time
Description
The motor can be automatically started after a short
supply power failure using the automatic restart
function. See section Automatic restart (page
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.
0.0 s = Automatic restarting disabled.
0.1 ... 5.0 s = Maximum power failure duration.
Selects 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
• With permanent magnet motors,
mode must be used.
See also section DC magnetization (page
Immediate start from zero speed.
The drive pre-magnetizes the motor before start. The
premagnetizing time is defined by parameter
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.
119).
21.1 Start mode.
Automatic start
106).
21.2
Def / Type
FbEq 16b / 32b
5.0 s / real32
1 = 1 s / 10 = 1 s
Normal / uint16
0
1