Omron SYSDRIVE MX2 SERIES User Manual page 258

5-10 Brake Settings
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
(2) Allocate the Brake release (19: BRK) for releasing the brake, to any Multi-function Output
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
Parameter
5
C001 to C007
C021 to C022
*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.
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.
5-143
confirmation (44: BOK) to any of Multi-function Input Selections (C001 to C007).
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.
Function name
No.
Brake Control
b120
Function Selection
Brake Release Wait
b121
Time
Acceleration Wait
b122
Time
b123 Stop Wait Time
Brake Wait Time for
b124
Confirmation
Brake Release
b125
Frequency
Brake Release
b126
Current
b127 Break ON Frequency
Multi-function Input
Selection
Multi-function Output
Terminal Selection
C026 Multi-function Relay
Output Function Selection
Data
00: Disabled
01: Enabled
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 to 5.00
Set a mechanical delay time from when the
release signal is output until the brake is released.
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 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 to 400.0
Set a frequency to output the brake
*1
release signal.
0.0 to 2.0 × Inverter rated current
Set an output current that allows the
*2
brake to be released.
0.00 to 400.0
Set a frequency to close the brake
*1
during stop.
44: BOK (Brake confirmation)
19: BRK (Brake release)
20: BER (Brake error)
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
Default
Unit
setting
00 −
0.00 s
0.00 s
0.00 s
0.00 s
0.00 Hz
Inverter
rated A
current
0.00 Hz
− −
− −