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64 Program features
Notes:
• DC hold is only available in speed control in DTC motor control mode (see page
• The function applies the DC current to one phase only, depending on the position
of the rotor. The return current will be shared between the other phases.
Post-magnetization
This feature keeps the motor magnetized for a certain period (parameter
) 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
. The magnetization
current is set by parameter
.
Note:
Post-magnetization is only available when ramping is the selected stop mode
(see parameter
Continuous magnetization
A digital signal, such as a user bit in the fieldbus control word, can be selected to
activate continuous magnetization. This can be especially useful in processes
requiring motors to be stopped (for example, to stand by until new material is
processed), then quickly started without magnetizing them first.
Notes:
• Continuous magnetization is only available in speed control in DTC motor control
). If parameter
Continuous magnetization command
is
on, the motor will be kept magnetized after a ramp stop. To enable continuous
magnetization after a coast stop, the command (
) must be cycled (on, off,
Reference
Motor speed
DC hold
t
t
Summary of Contents for ACS880-x04
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Page 4: ......
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 112: ...112 Application macros ...
Page 496: ...496 Additional parameter data ...
Page 544: ...544 Fault tracing ...
Page 602: ...602 Control chain diagrams ...