Mitsubishi Electric 800 Series Instruction Manual page 547

5.13.7 DC injection brake
• Timing to stop or braking torque can be adjusted by applying DC injection brake at the time of stopping motor. By the DC
injection brake operation, DC voltage is applied to the motor to prevent rotation of the motor shaft. The motor shaft will not
return to its original position when it is rotated due to external force.
Pr.
10 DC injection brake operation
G100 frequency
11 DC injection brake operation
G101 time
12 DC injection brake operation
G110 voltage
 Setting of operating frequency (Pr.10)
• By setting the frequency to operate the DC injection brake to Pr.10 DC injection brake operation frequency, the DC
injection brake will operate when it reaches this frequency at the time of deceleration.
• When Pr.10 = "9999", DC injection brake will start when the frequency reaches Pr.13 Starting frequency.
• The DC injection brake operation frequency depends on the stopping method.
Stopping method
Press the STOP key on the
operation panel
Turning OFF of the STF/STR
signal
Set the frequency to 0 Hz
• DC injection brake operation frequency will be fixed to 0 Hz at the time of PM motor control.
546
5. PARAMETERS
5.13 (G) Control parameters
Name Initial value
3 Hz
0.5 s
1%
Parameter setting
0.5 Hz or higher in Pr.10
Lower than 0.5 Hz in Pr.10, and 0.5 Hz or
higher in Pr.13
Lower than 0.5 Hz in both Pr.10 and Pr.13
─
Output
frequency
(Hz)
DC injection
brake
voltage
Setting range
0 to 120 Hz Set the operation frequency for the DC injection brake.
9999 Operate at Pr.13 or lower
0 Without DC injection brake
0.1 to 10 s Set the operation time for the DC injection brake.
8888 Operate with X13 signal ON
0 to 30% Set the DC injection brake voltage (torque). When set to "0",
there will be without DC injection brake.
DC injection brake operation frequency
Pr.10 setting
0.5 Hz
Pr.10 or Pr.13 setting, whichever larger
Pr.13 setting or 0.5 Hz, whichever smaller
Pr.10 Operation
frequency
Time
Pr.12
Operation
voltage
Time
Pr.11 Operation time
Description