Mitsubishi Electric FR-E800 Series Instruction Manual page 436

• The DC injection brake operation frequency depends on the stopping method.
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
• The DC injection brake operation frequency will be fixed to 0 Hz under PM sensorless vector control.
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 starts when the X13 signal is turned ON even while operating.
• For the X13 signal input, set "13" in any of Pr.178 to Pr.189 to assign the function.
NOTE
• Under Real sensorless vector control, when the X13 signal turns ON while Pr.11 = "8888", the zero speed control is activated
regardless of the Pr.850 Brake operation selection setting.
• Under Vector control, zero speed control or servo lock starts depending on the setting of Pr.802.
 Setting of operation voltage (torque) (Pr.12)
• Set the percentage against the power supply voltage in Pr.12 DC injection brake operation voltage. (The setting is not
used for zero speed control or servo lock.)
• The DC injection brake operation is not available when the setting of Pr.12 is 0%. (The motor starts to coast when the
output frequency drops to the Pr.10 setting or lower at a stop.)
• The Pr.12 setting is disabled under PM sensorless vector control.
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 ≠ "8888"
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"
—
DC injection Pr.12
Operation
brake
voltage
voltage
Pr. 11 Operation time
16.6 DC injection brake, zero speed control, servo lock, and magnetic flux decay output shutoff
DC injection brake operation
0.5 Hz
Pr.10 or Pr.13 setting, whichever larger
0.5 Hz
Pr.13 setting or 0.5 Hz, whichever
smaller
0 Hz
Motor coasts at the frequency set in
Pr.10 or lower.
0.5 Hz
0 Hz
Pr. 10 Operation
frequency
Time
Time
frequency
435
16. (G) Control Parameters
11
12
13
14
15
16
17
18
19
20