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PARAMETERS
69
"
" DC dynamic brake (Pr. 10, Pr. 11, Pr. 12)
4.2.7 DC injection brake (Pr. 10 to Pr. 12)
Pr. 10 "DC injection brake operation frequency"
Pr. 11 "DC injection brake operation time"
Pr. 12 "DC injection brake voltage"
By setting the DC injection brake voltage (torque),
operation time and operation starting frequency, the stopping accuracy of positioning
operation, etc. or the timing of operating the DC injection brake to stop the motor can
be adjusted according to the load.
Parameter
Number
Factory
Setting
Setting
Range
10 3Hz 0 to 120Hz
11 0.5 s 0 to 10 s
12 6% 0 to 30%
Operation
frequenc
y
DC injection
brake voltage
Output frequency (Hz)
Time
Time
Pr.12
Operation time
Pr.11
Pr.10
Operation
voltage
<Setting>
!
Use Pr. 10 to set the frequency at which the DC injection brake operation is started.
!
Use Pr. 11 to set the period during when the brake is operated.
!
Use Pr. 12 to set the percentage of the power supply voltage.
!
The setting value for Pr. 12 when using the inverter-dedicated motor (constant-
torque motor).
FR-E520-0.1KND to 7.5KND ............................................................4% (Note)
Note: When the Pr. 12 value is as factory-set, changing the Pr. 71 value to the
setting for use of a constant-torque motor changes the Pr. 12 value to 4%
automatically.
CAUTION
Install a mechanical brake. No holding torque is provided.