Mitsubishi Electric 800 Series Instruction Manual (Function page 478

• The frequency values to start brake operation are as follows.
Motor Stopping method
Press the STOP/RESET key on
the operation panel.
Induction
Turn OFF the STF/STR signal.
motor
Set frequency to 0 Hz
Press the STOP/RESET key on
the operation panel.
PM motor
Turn OFF the STF/STR signal.
Set frequency to 0 Hz
NOTE
• When executing pre-excitation (zero speed control) under Real sensorless vector control, set Pr.10 DC injection brake
operation frequency to 0.5 Hz or lower since it may cause motor vibration, etc., at the time of deceleration stop.
• The initial value of Pr.10 will automatically switch to 0.5 Hz under Vector control.
 Operation time setting (X13 signal, Pr.11)
• Set the operation time for DC injection brake (zero speed control / servo lock) in Pr.11 DC injection brake operation time.
• When the motor does not stop due to large load moment (J), increase the setting to ensure the effect.
• When Pr.11 = "0 s", DC injection brake (zero speed control / servo lock) does not start. (The motor starts to coast when
the output frequency drops to the Pr.10 setting or lower at a stop.)
• When Pr.11 = "8888", DC injection brake (zero speed control / servo lock) starts when the X13 signal is turned ON. DC
injection brake (zero speed control / servo lock) will start when the X13 signal is turned ON, even during operation, during
automatic restart after instantaneous power failure, or during offline auto tuning.
Parameter setting
0.5 Hz or higher in Pr.10 Pr.10 setting
Lower than 0.5 Hz in
Pr.10, and 0.5 Hz or
Pr.11 ≠ "0, 8888"
higher in Pr.13
Lower than 0.5 Hz in
both Pr.10 and Pr.13
0.5 Hz or higher in Pr.10
Lower than 0.5 Hz in
Pr.11 = "0" Pr.10, and 0.5 Hz or
higher in Pr.13
Lower than 0.5 Hz in
both Pr.10 and Pr.13
Pr.11 = "8888"
—
Pr.11 ≠ "0, 8888"
Pr.11 = "0"
Pr.11 = "8888"
—
Output
frequency
(Hz)
DC injection
Pr.12
Operation
brake
voltage
voltage
Pr.11 Operation time
17.6 DC injection brake, zero speed control, servo lock, and magnetic flux decay output shutoff
Frequency to start brake operation
0.5 Hz
Pr.10 or Pr.13 setting, whichever larger
Output shutoff at the Pr.10 setting value
or lower
Output shutoff at 0.5 Hz or lower
Output shutoff at the Pr.10 or Pr.13
setting value (whichever larger) or lower
Output shutoff at 0.5 Hz or lower
Pr.13 setting or 0.5 Hz, whichever
smaller
0 Hz
Output shutoff at the Pr.10 setting value
or lower
Output shutoff at 0 Hz
0 Hz
Frequency to start
brake operation
Time
Time
477
17. (G) Control Parameters
11
12
13
14
15
16
17
18
19
20