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-A700 Instruction Manual

Parameter
6.13

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
6.13.1 DC injection brake and zero speed control, servo lock (LX signal, X13
signal, Pr. 10 to Pr. 12, Pr. 802, Pr. 850)
The FR-A700 EC frequency inverter has an adjustable DC brake function.
The DC injection brake can be operated at a motor stop to adjust the stop timing and braking
torque. Zero speed control can be selected during real sensorless vector control and either zero
speed control or servo lock can be selected under vector control.In DC injection brake operation,
DC voltage is directly applied to the motor to prevent the motor shaft from rotating when a motor
decelerates to stop. While, in zero speed control, vector control is performed to maintain 0r/min.
In either control, the motor will not return to the original position if the motor shaft rotates due to
external force.
The motor shaft position is maintained with servo lock. The motor will return to the original posi-
tion if the motor shaft rotates due to external force.
FR-A700 EC
Parameters that must be set
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
Motor brake and stop operation
Refer to
Section
Pr. 10 to Pr. 12, 6.13.1
Pr. 802, Pr. 850
Pr. 30, Pr. 70 6.13.2
Pr. 30 6.13.2
Pr. 250 6.13.3
Pr. 270, Pr. 275, 6.13.4
Pr. 276
Pr. 278 to Pr. 285, 6.13.5
Pr. 292
Pr. 350 to Pr. 366, 6.13.6
Pr. 369, Pr. 393,
Pr. 396 to Pr. 399
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