Dc Injection Brake - Mitsubishi Electric FR-F820-04750 Instruction Manual

Parameters
5.13.7

DC injection brake

Timing to stop or braking torque can be adjusted by applying DC injection brake at the time of stop-
ping motor.
By the DC injection brake operation, DC voltage is applied to the motor to prevent rotation of the mo-
tor shaft. The motor shaft will not return to its original position when it is rotated due to external force.
Pr.
10
G100
11
G101
12
G110
Initial value for the FR-F820-00340(7.5K) or lower and FR-F840-00170(7.5K) or lower.
Initial values for the FR-F820-00490(11K) to FR-F820-02330(55K), FR-F840-00250(11K) to FR-F840-
01160(55K).
Initial value for the FR-F820-03160(75K) or higher and FR-F840-01800(75K) or higher.
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
Tab. 5-277: DC injection brake operation frequency and stopping method
● DC injection brake operation frequency will be fixed to 0 Hz at the time of PM motor control.
DC injection
brake
voltage
FR-F800
Name
DC injection brake
operation frequency
DC injection brake
operation time
DC injection brake
operation voltage
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
⎯
Pr. 10 Operation
frequency
Time
Pr. 12
Operation
voltage
Time
Pr. 11 Operation time
Initial Setting
Description
value range
Set the operation frequency for the DC injection
0 to 120 Hz
brake.
3 Hz
9999 Operate at Pr. 13 or lower
0 Without DC injection brake
0.5 s 0.1 to 10 s Set the operation time for the DC injection brake
8888 Operate with X13 signal ON
4%
Set the DC injection brake voltage (torque).
0 to 30% When set to "0", there will be without DC injection
2%
brake.
1%
Fig. 5-251:
When Pr. 11 is set to a value between 0.1 and 10 s
(G) Control parameters
DC injection brake operation
frequency
Pr. 10 setting
0.5Hz
Pr. 10 or Pr. 13 setting, whichever larger
Pr. 13 setting or 0.5 Hz, whichever larger
I002753E
5 - 525