ABB ACS880 Firmware Manual page 152

152 Parameters
No. Name/Value
21.02 Magnetization time
0 ... 10000 ms
21.03 Stop mode
Coast
Ramp
Torque limit
21.04 Emergency stop
mode
Ramp stop (Off1)
Coast stop (Off2)
Description
Defines the pre-magnetization time when
• parameter 21.01 Start mode
motor control mode), or
• parameter 21.19 Scalar start mode
scalar motor control mode).
After the start command, the drive automatically
premagnetizes the motor for the set time. To ensure full
magnetizing, set this parameter to the same value as, or
higher than, the rotor time constant. If not known, use the
rule-of-thumb value given in the table below:
Motor rated power
< 1 kW
1 to 10 kW
10 to 200 kW
200 to 1000 kW
Note: This parameter cannot be changed while the drive is
running.
Constant DC magnetizing time.
Selects the way the motor is stopped when a stop command
is received.
Additional braking is possible by selecting flux braking (see
parameter 97.05 Flux braking).
Stop by switching off the output semiconductors of the drive.
The motor coasts to a stop.
WARNING! If a mechanical brake is used, ensure it is
safe to stop the drive by coasting.
Stop along the active deceleration ramp. See parameter
group 23 Speed reference ramp
Stop according to torque limits (parameters
Selects the way the motor is stopped when an emergency
stop command is received.
The source of the emergency stop signal is selected by
parameter 21.05 Emergency stop
With the drive running:
• 1 = Normal operation.
• 0 = Normal stop along the standard deceleration ramp
defined for the particular reference type (see section
Reference ramping [page 37]). After the drive has stopped,
it can be restarted by removing the emergency stop signal
and switching the start signal from 0 to 1.
With the drive stopped:
• 1 = Starting allowed.
• 0 = Starting not allowed.
With the drive running:
• 1 = Normal operation.
• 0 = Stop by coasting. The drive can be restarted by
restoring the start interlock signal and switching the start
signal from 0 to 1.
With the drive stopped:
• 1 = Starting allowed.
• 0 = Starting not allowed.
is set to Const time (in DTC
is set to Const time
Constant magnetizing time
> 50 to 100 ms
> 100 to 200 ms
> 200 to 1000 ms
> 1000 to 2000 ms
on page 164.
30.19 and 30.20). 2
source.
Def/FbEq16
500 ms
(in
1 = 1 ms
Coast
0
1
Ramp stop
(Off1)
0
1