5-143
5-10 Brake Settings
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
5
Functions
To use the Brake Control function, allocate the following functions to multi-function I/O
terminals, as required.
(1) To input a brake release signal from an external brake to the Inverter, allocate the Brake
confirmation (44: BOK) to any of Multi-function Input Selections (C001 to C007).
(2) Allocate the Brake release (19: BRK) for releasing the brake, to any Multi-function Output
Terminal Selections (C021 to C022) or Multi-function Relay Output Function Selection. Also, to
use a brake error output signal, allocate the Brake error (20: BER). When the Brake Control
function is used, it is recommended to use Sensorless Vector Control (A044 = 03) in which high
torque is generated at start. For details, refer to "Sensorless Vector Control" on page 5-144.
When the Brake Control function is used, it is recommended to use Sensorless Vector Control (A044 = 03)
in which high torque is generated at start. For details, refer to "Sensorless Vector Control" on page 5-144.
Parameters Required for Brake Control Function
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 Wait Time (b121) elapses.
When the brake confirmation signal (BOK) is used. The brake confirmation signal did not turn ON within
the Brake Wait Time for Confirmation (b124) during acceleration. Or the brake confirmation signal did
not turn OFF within the Brake Wait Time for Confirmation (b124) during deceleration. In case that Brake
Confirmation Signal (BOK) is turned OFF when Brake Release Signal (BRK) is output.
Parameter
No.
Function name Data
Default
setting
Unit
b120
Brake Control
Function Selection
00: Disabled
00 −
01: Enabled
b121
Brake Release Wait
Time
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
Acceleration Wait
Time
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 Stop Wait Time
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 output until the brake sends
the release completion signal to the Inverter.
0.00 s
b125
Brake Release
Frequency
0.00 to 400.0
Set a frequency to output the brake
release signal.
*1
0.00 Hz
b126
Brake Release
Current
0.0 to 2.0 × Inverter rated current
Set an output current that allows the
brake to be released.
*2
Inverter
rated
current
A
b127 Break ON Frequency
0.00 to 400.0
Set a frequency to close the brake
during stop.
*1
0.00 Hz
C001 to C007
Multi-function Input
Selection
44: BOK (Brake confirmation)
−−
C021 to C022
C026
Multi-function Output
Terminal Selection
Multi-function Relay
Output Function Selection
19: BRK (Brake release)
−−
20: BER (Brake error)
*1.Set a value greater than what is set in Starting Frequency (b082).
*2.If the set current is too low, sufficient torque may not be provided when the brake is released.
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