Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 600 / 727

(G) Control parameters
PARAMETERS
599
5
GROUP
G
Parameters referred to
Pr.0 Torque boost page 589
Pr.3 Base frequency, Pr.19 Base frequency voltage page 591
Pr.12 DC injection brake operation voltage page 599
Pr.47 Second V/F (base frequency), Pr.113 Third V/F (base frequency) page 598
Pr.60 Energy saving control selection page 597
Pr.71 Applied motor, Pr.450 Second applied motor page 423
5.16.7
DC injection brake, zero speed control, and
servo lock
 Setting of operating frequency (Pr.10)
• By setting the frequency to operate the DC injection brake (zero speed control and servo lock) to Pr.10 DC injection brake
operation frequency , the DC injection brake (zero speed control and servo lock) will operate when it reaches this
frequency at the time of deceleration.
• When Pr.10 = "9999", DC injection brake (zero speed control, servo lock) will start when the frequency reaches Pr.13
Starting frequency .
• The DC injection brake operation frequency depends on the stopping method.
• 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. Name
Initial
value Setting
range
Description
10
G100 DC injection brake
operation frequency
3 Hz
0 to 120 Hz
Set the operation frequency for the DC injection brake (zero
speed control and servo lock).
9999 Operate at Pr.13 or lower
11
G101 DC injection brake
operation time
0.5 s
0
Without DC injection brake (zero speed control and servo
lock)
0.1 to 10 s
Set the operation time for the DC injection brake (zero speed
control and servo lock).
8888 Operate with X13 signal ON
12
G110 DC injection brake
operation voltage
1% 0 to 30%
Set the DC injection brake voltage (torque). When set to "0",
there will be without DC injection brake.
802
G102
Pre-excitation selection
0
0 Zero speed control
1 Servo lock
1299
G108 Second pre-excitation
selection
0
0 Zero speed control
The pre-excitation
operation of the second
motor can be selected.
1 Servo lock
850
G103 Brake operation
selection
0
0 DC injection brake operation
1 Zero speed control (Real sensorless vector control)
2
Magnetic flux decay output shutoff (Real sensorless vector
control)
Stopping method Parameter setting DC injection brake operation frequency
Press the STOP key on the
operation panel
Turning OFF of the STF/STR
signal
0.5 Hz or higher in Pr.10 Pr.10 setting
Lower than 0.5 Hz in Pr.10 , and 0.5 Hz or
higher in Pr.13
0.5 Hz
Lower than 0.5 Hz in both Pr.10 and Pr.13 Pr.10 or Pr.13 setting, whichever larger
Set the frequency to 0 Hz ─ Pr.13 setting or 0.5 Hz, whichever smaller