ABB ACS880 - Page 295

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
- / uint16Activates/deactivates the DC hold and
post-magnetization functions. See section DC
magnetization (page 106).
Note:
• DC hold is only available with speed control in DTC
motor control mode (see page 42).
• 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.
DC current control21.8
1 = Enable DC hold. See section DC hold (page 106).
Note: The DC hold function has no effect if the start
signal is switched off.
DC holdb0
1 = Enable post-magnetization. See section
Post-magnetization (page 107).
Note: Post-magnetization is only available when
ramping is the selected stop mode (see parameter 21.3
Stop mode).
Post magnetizationb1
Reservedb2…15
1 = 10000h…FFFFh
5.00 rpm / real32Defines the DC hold speed. See parameter 21.8 DC
current control, and section DC hold (page 106).
DC hold speed21.9
- / -DC hold speed. For scaling, see parameter 46.1.0.00 ... 1000.00 rpm
30.0 % / real32Defines the DC hold current in percent of the motor
nominal current. See parameter 21.8 DC current control,
and section DC magnetization (page 106).
DC current reference21.10
1 = 1 % / 10 = 1 %DC hold current.0.0 ... 100.0 %
0 s / uint32Defines 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 21.8 DC current control.
Post magnetization
time
21.11
1 = 1 s / 1 = 1 sPost-magnetization time.0...3000 s
Parameters 295