Omron RX Series User Manual page 431

Precautions for Correct Use Precautions for Correct Use
The above operation chart applies to a case where 44: BOK (Brake confirmation signal) is
allocated to one of the Multi-function Input S1 to S8 Selection (C001 to C008). If BOK is not
selected, the Acceleration Wait Time on Brake Control (b122) starts when the brake release
signal turns ON and the Stop Wait Time on Brake Control (b123) starts when the brake release
signal turns OFF.
• 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 one of the
Multi-function Input S1 to S8 Selection (C001 to C008) to 44: BOK (Brake confirmation
signal).
(2) To release a brake, allocate one of the multi-function output terminals P1 to P5 (C021 to
C025) to 19: BRK (Brake release signal). Also, to use a brake error output signal, allocate
one of them to 20: BER (Brake error).
• When using the brake control function, it is recommended to use sensorless vector control (A044
= 03), 0-Hz sensorless vector control (A044 = 04), or Sensor vector control (A044 = 05), which
generates a high torque during startup.
Parameter
No.
Brake Control Function
b120
Selection
Brake Release Wait
b121
Time
Acceleration Wait Time
b122
on Brake Control
Stop Wait Time on
b123
Brake Control
Brake Error Detection
b124
Time
Brake Release
b125
Frequency
b126 Brake Release Current
b127 Break Force Frequency
Related functions
*1. Set this to a value larger than the Starting Frequency (b082).
*2. If the set value is too low, the inverter may not output a sufficient torque when the brake is released.
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Function name
00: Disabled
01: Enabled
0.00 to 5.00:
Set the time required for the output current to
reach the brake release current after
reaching the brake release frequency.
0.00 to 5.00:
Set the mechanical delay time from when the
brake release signal is output until the brake
is released.
0.00 to 5.00:
Set the mechanical delay time from when the
brake release signal turns OFF until the
brake is applied.
0.00 to 5.00:
Set this to longer than the time from when
the release signal is output until the release
completion signal output by the brake is input
to the inverter.
0.00 to 99.99/100.0 to 400.0 [Hz]: Set the
frequency at which the brake release signal
is output.
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)
0.00 to 99.99/100.0 to 400.0:
Set the frequency at which the brake is
closed during stop.
C001 to C008, C021 to C025
Data
*1
*1
7 Detailed Functions
Default data Unit
00 –
0.00 s
0.00 s
0.00 s
0.00 s
0.00 Hz
*2
Rated current
–
value
*2
0.00 Hz
7 - 105
7