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PARAMETERS
72
Pr. 13 "starting frequency"
Pr. 71 "applied motor"
Related parameters
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 stopping DC dynamic brake voltage (torque), operation time and operation starting frequency,
the stopping accuracy of positioning operation, etc. or the timing of operating the DC dynamic brake to stop
the motor is adjusted according to the load.
Parameter
Number
Factory
Setting
Setting Range Remarks
10 3Hz 0 to 120Hz, 9999
9999: Operated at
or below Pr. 13
value.
11 0.5 s 0 to 10 s, 8888
8888: Operated
when X13 signal
switches on.
7.5K or less 4%
12
11K or more 2%
0 to 30%
Pr.10
Pr.12
Pr.11
Operation time
Output frequency (Hz)
Operation
frequency
Time
DC dynamic
brake voltage
Operation
voltage
Time
<Setting>
•
Use Pr. 10 to set the frequency at which the DC dynamic brake application is started.
By setting "9999" in Pr. 10, the motor is decelerated to the frequency set in Pr. 13 and braked.
•
Use Pr. 11 to set the period during when the brake is operated. By setting “8888” in Pr. 11, the DC dynamic
brake is operated while the X13 signal is on.
•
Use any of Pr. 180 to Pr. 186 to assign the terminal used to input the X13 signal.
•
Use Pr. 12 to set the percentage of the power supply voltage.
•
When using the inverter dedicated motor (constant-torque motor), change the Pr. 12 setting as follows:
3.7K or less...4%, 5.5K or more...2% (Note 1)
Note: 1. When the Pr. 12 setting is either of the following values for 5.5K and 7.5K, it is automatically
changed when the Pr. 71 setting is changed:
(1) When Pr. 12 setting is 4% (factory setting)
The Pr. 12 setting is changed to 2% automatically when the Pr. 71 setting is changed from
[general-purpose motor selection value (0, 2)] to [constant-torque motor selection value (1)].
(2) When Pr. 12 setting is 2%
The Pr. 12 setting is changed to 4% (factory setting) automatically when the Pr. 71 setting is
changed from [constant-torque motor selection value (1)] to [general-purpose motor selection
value (0, 2)].
2. When Pr. 11 = "0" or Pr. 12 = "0", DC dynamic brake operation cannot be performed.
CAUTION
Install a mechanical brake. No holding torque is provided.