ABB ACS860 - Page 147

Parameters 147
21.08 DC current control Activates/deactivates the DC hold and post-magnetization
functions. See section DC magnetization (page 52).
Notes:
• These functions are only available in speed control in
Vector 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 52).
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 52).
30.0%
0.0 … 100.0% DC hold current. 1 = 1%
21.12 Continuous
magnetization
command
Activates/deactivates (or selects a source that
activates/deactivates) continuous magnetization. See section
Continuous magnetization (page 53).
The magnetization current is calculated on the basis of flux
reference (see parameter group 97 Motor control).
Notes:
• This function is only available when ramping is the selected
stop mode (see parameter 21.03 Stop mode), and only in
speed control in Vector motor control mode (see page 22).
• 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
Other [bit] Source selection (see Terms and abbreviations on page 92). -
No. Name/Value Description Def/FbEq16
Bit Value
0 1 = Enable DC hold. See section DC hold (page 52).
Note: The DC hold function has no effect if the start signal is switched off.
2…15 Reserved