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Motor Brake And Stop Operation; Dc Injection Brake And Zero Speed Control, Servo Lock (lx Signal, X13 Signal, Pr. 10 To Pr. 12, Pr. 802, Pr. 850) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Fr-a700 series.
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Motor brake and stop operation

4.14 Motor brake and stop operation
Purpose
Motor braking torque adjustment
Improve the motor braking torque
with an option
Performing operation by DC current
input
Coast the motor to a stop
Used to stop the motor with a
mechanical brake (vibration restraint
at stop-on-contact)
Used to stop the motor with a
mechanical brake (operation timing
of a mechanical brake)
Perform position stop (orientation)
control of the rotation shaft
4.14.1 DC injection brake and zero speed control, servo lock (LX signal, X13 signal,
Pr. 10 to Pr. 12, Pr. 802, Pr. 850)
The DC injection brake can be operated at a motor stop to adjust the stop timing and braking torque.
Pr.9
page 176
Zero speed control can be selected during real sensorless vector control and either zero speed control or servo
Pr.13
lock can be selected under vector control.
page 170
In DC injection brake operation, DC voltage is directly applied to the motor to prevent the motor shaft from
Pr.849
rotating. In zero speed control, vector control is performed to maintain 0r/min. In either control, the motor will not
page 279
return to the original position if the motor shaft rotates due to external force.
Pr.858
The motor shaft position is maintained with servo lock. The motor will return to the original position if the motor
page 98
shaft rotates due to external force.
Pr.858
page 148
Parameter
Pr.858
Number
page 273
DC injection brake
10
operation frequency
DC injection brake
11
operation time
DC injection brake
12
operation voltage
Pre-excitation
802 *
selection
Brake operation
850
selection
* This parameter can be set when the FR-A7AP (option) is mounted.
194
DC injection brake and zero speed
control, servo lock
Selection of a regenerative brake
DC current feeding mode
Selection of motor stopping method
Stop-on-contact control
Brake sequence function
Orientation control
Name
Initial Value
3Hz
0.5s
7.5K or less
11K to 55K
75K or more
0
0
Parameter that must be Set
Pr. 10 to Pr. 12,
Pr. 802, Pr. 850
Pr. 270, Pr. 275,
Pr. 278 to Pr. 285,
Pr. 350 to Pr. 366,
Pr. 369, Pr. 393,
Pr. 396 to Pr. 399
Setting Range
Set the operation frequency of the DC
0 to 120Hz
injection brake (zero speed control, servo
lock).
9999
Operated at Pr. 13 or less.
DC injection brake (zero speed control)
0
disabled
Set the operation time of the DC injection
0.1 to 10s
brake (zero speed control, servo lock).
4%
Set the DC injection brake voltage (torque).
2%
0 to 30%
When "0" is set, DC injection brake is disabled.
1%
0
Zero speed control
1
Servo lock
0
DC injection brake operation
1
Zero speed control
Refer to Page
Pr. 30, Pr. 70
Pr. 30
Pr. 250
Pr. 276
Pr. 292
Description
194
197
197
203
204
207
210

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