Program features 53
into the motor. The current is set by parameter 21.10 DC current reference. When the
reference exceeds parameter 21.09 DC hold speed, normal drive operation
continues.
Notes:
• DC hold is only available in speed control in Vector motor control mode (see page
22).
• 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.
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.
Note: Continuous magnetization is only available in speed control in Vector motor
control mode (see page 22), and only when ramping is the selected stop mode (see
parameter 21.03 Stop mode).
WARNING: The motor must be designed to absorb or dissipate the thermal
energy generated by continuous magnetization, for example by forced
ventilation.
Settings
Parameters 06.21 Drive status word 3 (page 108), 21.01 Start mode, 21.02
Magnetization time, 21.08…21.12 (page 143).
Reference
Motor speed
DC hold
21.09 DC hold speed
t
t
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