4-77
4-2 Function Mode
4
Functions
•Allocate the brake release signal (19: BRK) to any of multi-function output terminals 11 to 15
(C021 to C025). Also, to use a brake error output signal, allocate the brake error signal (20:
BER).
•To use the brake control function, you are recommended to select "sensorless vector control"
(A044 = 03), "0-Hz sensorless vector control" (A044 = 04), or "sensor vector control" (A044 = 05)
so that the Inverter outputs high torque during startup. (Refer to page 4-21.)
Parameters Required for Brake Control Function
*1. Set a brake release frequency higher than the starting frequency (b082).
*2. If the set current is too low, sufficient torque may not be provided when the brake is released.
In any of the following cases, the Inverter trips and outputs the brake error signal (BER). (Brake error:
E36)
•The output current is lower than the release current after the brake release establishment wait time
(b121) elapses.
•When the brake confirmation (BOK) signal is used, the brake confirmation signal does not turn on
within the brake confirmation wait time (b124) during acceleration, or does not turn off within the
brake confirmation wait time (b124) during deceleration; or the brake confirmation signal turns off,
although the brake release signal is output.
Parameter No. Function name Data Default setting Unit
b120 Brake control selection
00: OFF (Disabled)
01: ON (Enabled)
00 
b121
Brake wait time for
release
0.00 to 5.00:
Set a time required for the output current to
reach the rate of the release current after
reaching the release frequency.
0.00 s
b122
Brake wait time for
acceleration
0.00 to 5.00:
Set a mechanical delay time from when the
release signal is output until the brake is
released.
0.00 s
b123
Brake wait time for
stopping
0.00 to 5.00:
Set a mechanical delay time from when the
release signal is turned off until the brake is
closed.
0.00 s
b124
Brake wait time for
confirmation
0.00 to 5.00:
Set a wait time longer than the time from
when the release signal is released until the
brake outputs the release completion signal
to the Inverter.
0.00 s
b125 Brake release frequency
0.00 to 400.00:
Set a frequency to output the brake release
signal.
*1
0.00 Hz
b126 Brake release current
0.0 to 2.00 x Rated current (0.4 to 55 kW)
0.0 to 1.80 x Rated current (75 to 132 kW)
Rated current 
b127 Brake input frequency
0.00 to 400.00:
Set a frequency to close the brake during
stop.
*1
0.00 Hz
Related functions C001 to C008, C021 to C025
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