ABB ACS180 - Page 156

156 Parameters
21.08 DC current control Activates/deactivates the DC hold and post-magnetization
functions. See section DC magnetization on page 66.
Note: 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.
0b0000
0b0000…0b1111 DC magnetization selection. 1 = 1
21.09 DC hold speed Defines the DC hold speed in speed control mode. See
parameter 21.08 DC current control, and section DC hold
on page 66.
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 on page 66.
After 100 s post-magnetization time, the maximum
magnetization current is limited to the magnetization
current corresponding to the actual flux reference.
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
21.14 Pre-heating input
source
Selects the source for triggering pre-heating for the motor.
The status of the pre-heating is shown as bit 2 of 06.21
Drive status word 3.
Notes:
• The heating function requires that STO is not triggered.
• The heating function requires that the drive is not
faulted.
• Pre-heating uses DC hold to produce current.
Off
Off 0. Pre-heating is always deactivated. 0
On 1. Pre-heating is always activated when the drive is
stopped.
1
DI1 Digital input DI1 (10.02 DI delayed status, bit 0). 2
DI2 Digital input DI2 (10.02 DI delayed status, bit 1). 3
DI3 Digital input DI3 (10.02 DI delayed status, bit 2). 4
No. Name/Value Description Default
FbEq 16
Bit Name Value
0 DC hold 1 = DC hold. See section DC hold on page 66.
Note: The DC hold function has no effect if the start signal is switched
off.
1Post-
magnetization
1 = Post-magnetization. See section Post-magnetization on page 67.
Note: Post-magnetization is only available when ramping is the selected
stop mode (see parameter 21.03 Stop mode).
2 DC brake 1 = Enable DC brake.
3…15 Reserved
ACS180 FW.book Page 156 Tuesday, March 9, 2021 2:25 PM