Automatic Start; Settings; Dc Magnetizing; Dc Hold - ABB ACS800 Series Firmware Manual

Automatic Start

Since the drive can detect the state of the motor within a few milliseconds, starting is
immediate under all conditions. There is no restart delay, e.g. the starting of
turbining pumps or windmilling fans is easy.

Settings

Parameter

DC Magnetizing

When DC Magnetizing is activated, the drive automatically magnetizes the motor
before the start. This feature guarantees the highest possible breakaway torque, up
to 200% of motor nominal torque. By adjusting the premagnetizing time, it is possible
to synchronize the motor start and e.g. a mechanical brake release. The Automatic
Start and DC Magnetizing features cannot be activated at the same time.
Settings
Parameters

DC Hold

By activating the motor DC Hold feature it is possible to
lock the rotor at zero speed. When both the reference
and the motor speed fall below the preset DC hold
speed, the drive stops the motor and starts to inject DC
into the motor. When the reference speed again
exceeds the DC hold speed, the normal drive operation
resumes.
Settings
Parameters
.
21.01
and .
21.01 21.02
... .
21.04 21.06
Motor
Speed
DC Hold
DC hold
speed
Speed
Reference
DC hold
speed
Program features
33
t
t