ABB ACS580 - Page 201

Parameters 197
21.02 Magnetization time Defines the pre-magnetization time when
• parameter 21.01 Vector start mode is set to Const time (in
vector motor control mode), or
• parameter 21.19 Scalar start mode is set to Const time (in
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:
Note: This parameter cannot be changed while the drive is
running.
500 ms
0…10000 ms Constant DC magnetizing time. 1 = 1 ms
21.03 Stop mode 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).
Coast
Coast 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.
0
Ramp Stop along the active deceleration ramp. See parameter
group 23 Speed reference ramp on page 212 or 28
Frequency reference chain on page 226.
1
Torque limit Stop according to torque limits (parameters 30.19 and 30.20).
This mode is only possible in vector motor control mode.
2
21.04 Emergency stop
mode
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 source.
Ramp stop
(Off1)
Ramp stop (Off1) With the drive running:
• 1 = Normal operation.
• 0 = Normal stop along the standard deceleration ramp
defined for the particular reference type (see section Rush
control [page 118]). 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.
0
No. Name/Value Description Def/FbEq16
Motor rated power Constant magnetizing time
< 1 kW >
50 to 100 ms
1 to 10 kW >
100 to 200 ms
10 to 200 kW >
200 to 1000 ms
200 to 1000 kW >
1000 to 2000 ms
ACS580 FW.book Page 197 Wednesday, September 21, 2016 9:48 PM