ABB ACS580 Firmware Manual page 111

DC hold
The function makes it possible to lock the rotor at (near) zero speed in the middle of
normal operation. DC hold is activated by parameter
both the reference and motor speed drop below a certain level (parameter
hold speed), the drive will stop generating sinusoidal current and start to inject DC
into the motor. The current is set by parameter
reference exceeds parameter
continues.
Motor speed
Reference
21.09 DC hold speed
Settings
Parameters 21.08 DC current control
Post-magnetization
The function keeps the motor magnetized for a certain period (parameter
magnetization time) after stopping. This is to prevent the machinery from moving
under load, for example before a mechanical brake can be applied. Post-
magnetization is activated by parameter
current is set by parameter
Note: Post-magnetization is only available when ramp stop is selected (see
parameter 21.03 Stop
Settings
Parameters 21.01 Vector start
(page 188).
Pre-heating (Motor heating)
The pre-heating function keeps the motor warm and prevents condensation inside the
motor by feeding it with DC current when the drive has been stopped. The heating
21.09 DC hold
and
21.08 DC current
21.10 DC current
mode).
mode, 21.02 Magnetization time
21.08 DC current
21.10 DC current
speed, normal drive operation
DC hold
21.09 DC hold speed
control. The magnetization
reference.
Program features 107
control. When
21.09 DC
reference. When the
t
t
21.11 Post
and 21.08...21.11