Dc Injection Brake, Zero Speed Control, And Servo Lock - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters
5.16.7

DC injection brake, zero speed control, and servo lock

● Timing to stop or braking torque can be adjusted by applying DC injection brake at the time of
stopping motor.
● Zero speed control can also be selected at the time of the Real sensorless vector control, and zero
speed control and servo lock can be selected at the time of vector control or PM sensorless vector
control.
● DC injection brake is preventing the motor shaft to turn by applying DC voltage to the motor, and
the other hand, zero speed control is using vector control to maintain 0 r/min. Either way, the
motor shaft will not return to its original position when it is rotated due to external force.
● Servo lock will maintain the position of the motor shaft. When a motor shaft is rotated by external
force, it goes back to the original position.
● Select the magnetic flux decay output shutoff function to decay the magnetic flux before shutting
off the output at a stop.
Pr.
10
G100
11
G101
12
G110
802
G102
1299
G108
850
G103
Initial value for the FR-A820-00490(7.5K) or lower and FR-A840-00250(7.5K) or lower.
Initial values for the FR-A820-00630(11K) to FR-A820-03160(55K), FR-A840-00310(11K) to FR-A840-
01800(55K).
Initial value for the FR-A820-03800(75K) or higher and FR-A840-02160(75K) or higher.
FR-A800
Name Initial value
DC injection brake
operation frequency
DC injection brake
operation time
DC injection brake
operation voltage
Pre-excitation selection
Second pre-excitation
selection
Brake operation selection
Setting
Description
range
Set the operation frequency for the DC injection
0 to 120 Hz
brake (zero speed control and servo lock).
3 Hz
9999 Operate at Pr. 13 or lower
Without DC injection brake (zero speed control and
0
servo lock)
Set the operation time for the DC injection brake (zero
0.5 s
0.1 to 10 s
speed control and servo lock).
8888 Operate with X13 signal ON
4%
Set the DC injection brake voltage (torque). When set
0 to 30%
2%
to "0", there will be without DC injection brake.
1%
0 Zero speed control
0
1 Servo lock
0 Zero speed control
0
1 Servo lock
0 DC injection brake operation
1 Zero speed control (Real sensorless vector control)
0
Magnetic flux decay output shutoff (Real sensorless
2
vector control)
(G) Control parameters
The pre-excitation
operation of the second
Servo lock motor can be
selected.
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