Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 904 / 1218

(G) Control parameters Parameters
5 - 702
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.
●
DC injection brake operation frequency will be fixed to 0 Hz at the time of PM sensorless vector
control (low-speed range high-torque mode disabled).
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
0.5Hz
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 larger
Tab. 5-318: DC injection brake operation frequency and stopping method
Fig. 5-346:
When Pr. 11 is set to a value between 0.1 and 10s
I002753E
NOTES When executing pre-excitation (zero speed control) at the time of 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.
Initial value of Pr. 10 will automatically switch to 0.5 Hz at the time of vector control.
Ou
tp
u
t
fr
equenc
y
(H
z)
DC injection
brake
voltage
Pr. 12
Operation
voltage
Time
Time
Pr. 10 Operation
frequency
Pr. 11 Operation time