Hitachi SJ300 Series Instruction Manual page 178

4–40
Using Intelligent Input Terminals
Code
B123
B124
B125
B126
Brake release output [BRK]
Brake OK input [BOK]
Brake error output [BER]
Function
Brake wait time
for stopping
Brake wait time
for confirmation
Break release 0.00 to 99.99 Hz /
frequency setting 100.0 to 400.0 Hz
Brake release
current setting
The diagram below shows the event sequence described in the steps on the previous page.
Output
frequency
Brake wait time for accel
B122
B125
Brake release
frequency
0
Run command
The following table pertains to the brake confirmation input.
Opt.
Symbol Function Name
Code
44 BOK Brake confirmation
C001, C002, C003, C004,
Valid for inputs:
C005, C006, C007, C008
B120=01
Required
B121 to B126 set
settings:
Notes:
• The signal [BOK] turns ON to indicate that an
external brake system has released. If external
brake control is enabled (B120=01), then the
[BOK] signal must work properly to avoid an
inverter trip event.
If [BOK] is not assigned to an intelligent
•
input, then setting B124 is ignored.
Data or Range
0.00 to 5.00 sec. Sets the time delay after brake confirmation signal
[BOK] turns OFF (after [BRK] turns OFF) until
decelerating the inverter to 0 Hz
0.00 to 5.00 sec. Sets the wait time for [BOK] signal after turn ON/
OFF of [BRK] signal. If [BOK] is not received
during the specified time, the inverter will trip with
an external brake error [BER].
Sets the frequency at which the inverter outputs the
brake release signal [BRK] after delay set by B121
0% to 200% of Sets the minimum inverter current level above
rated current which the brake release signal [BRK] will be
permitted
B121
Brake wait time to release
Brake wait time
for confirmation
B124
Input
State
ON
OFF
Description
Brake wait time for stop-
B123
B124
Description
Indicates external brake is not engaged
Indicates external brake is engaged
Example: (Requires input configuration—
see page 3–47. Jumper position shown is
for –xFU/-xFR models; for –xFE models,
see page 4–12.)
BOK
TH FW CM1
8 5
P24 PLC CM1
7 6 4
See I/O specs on page 4–9.
B125
t
3 1
2