Parameters 209
21.08 DC current control Activates/deactivates the DC hold and post-magnetization
functions. See section DC magnetization (page 63).
Notes:
• DC hold is only available with speed control in DTC motor
control mode (see page 22).
• DC magnetization causes the motor to heat up. In
applications where long DC magnetization times are
required, externally ventilated motors should be used. If the
DC magnetization period is long, DC magnetization cannot
prevent the motor shaft from rotating if a constant load is
applied to the motor.
0000b
0000b…0011b DC magnetization selection. 1 = 1
21.09 DC hold speed Defines the DC hold speed. See parameter 21.08 DC current
control, and section DC hold (page 63).
5.00 rpm
0.00 … 1000.00
rpm
DC hold speed. See par.
46.01
21.10 DC current
reference
Defines the DC hold current in percent of the motor nominal
current. See parameter 21.08 DC current control, and section
DC magnetization (page 63).
30.0%
0.0 … 100.0% DC hold current. 1 = 1%
21.11 Post magnetization
time
Defines the length of time for which post-magnetization is
active after stopping the motor. The magnetization current is
defined by parameter 21.10 DC current reference.
See parameter 21.08 DC current control.
0 s
0…3000 s Post-magnetization time. 1 = 1 s
21.12 Continuous
magnetization
command
Activates/deactivates (or selects a source that
activates/deactivates) continuous magnetization. See section
Continuous magnetization (page 64).
The magnetization current is calculated on the basis of flux
reference (see parameter group 97 Motor control).
Notes:
• This function is only available in DTC motor control mode.
• Continuous magnetization causes the motor to heat up. In
applications where long magnetization times are required,
externally ventilated motors should be used.
• Continuous magnetization may not be able to prevent the
motor shaft from rotating during a long period if a constant
load is applied to the motor.
0 = Normal operation
1 = Magnetization active
Off
Off 0. 0
On 1. 1
No. Name/Value Description Def/FbEq16
Bit Value
0 1 = Enable DC hold. See section DC hold (page 63).
Note: The DC hold function has no effect if the start signal is switched off.
1 1 = Enable post-magnetization. See section Post-magnetization (page 64).
Note: Post-magnetization is only available when ramping is the selected stop mode (see
parameter 21.03 Stop mode).
2…15 Reserved
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