External Brake Control - Hitachi SJ300 Series Instruction Manual

3–46
"B" Group: Fine-Tuning Functions
External Brake
Control
Func.
Name
Code
B120 Brake Control Enable
B121 Brake Wait Time for
Release
B122 Brake Wait Time for
Acceleration
B123 Brake Wait Time for
Stopping
B124 Brake Wait Time for
Confirmation
B125 Brake Release
Frequency Setting
B126 Brake Release Current
Setting
The brake control function in the inverter controls external braking used in systems such as
elevators. The purpose of this function is to ensure the inverter is powering the motor before
releasing external brakes that would permit the load to move or coast. This function requires the
configuration and wiring of intelligent input and output terminals. See
Function" on page 4–39
"B" Function
Description
Two option codes:
00 Disable
01 Enable
Sets time delay between
arrival at release frequency
and the brake release signal.
Range is 0.00 to 5.00 sec.
Sets time delay after brake
confirmation signal is
received until the inverter
begins acceleration
Range is 0.00 to 5.00 sec.
Sets time delay after brake
confirmation signal turns
OFF until decelerating the
inverter to 0 Hz.
Range is 0.00 to 5.00 sec.
Sets the wait time for confir-
mation after turn ON/OFF of
brake release. If confirma-
tion is not received during
the specified wait time, the
inverter will trip with an
external brake error.
Range is 0.00 to 5.00 sec.
Sets the frequency at which
the inverter will output the
brake release signal after
delay set by B121.
Range is 0.00 to 99.99 /
100.0 to 400.0Hz
Sets the minimum inverter
current level above which
the brake release signal will
be permitted.
Range is 0% to 200% of
rated current
Inverter
for more information.
Defaults
Run
Mode
Edit –FE –FU
Lo Hi
(EU) (US)
✘ ✔
00
✘ ✔
0.00 0.00
✘ ✔
0.00 0.00
✘ ✔
0.00 0.00
✘ ✔
0.00 0.00
✘ ✔
0.00 0.00
✘ ✔
Rated current for
each inverter model
[BRK] Brake release
[BOK] Brake confirmation
[BER] Brake error

"External Brake Control

SRW Display
Units
–FR
(JP)
00 00 — >b120 BRAKE
Mode
0.00 sec. >b121 BRAKE
STA-WAIT
0.00 sec. >b122 BRAKE
ACC-WAIT
0.00 sec. >b123 BRAKE
STP-WAIT
0.00 sec. >b124 BRAKE
BRK-WAIT
0.00 Hz >b125 BRAKE
OPEN-F
A >b126 BRAKE
OPEN-A
External Brake
System
Emergency Brake
(or alarm, etc.)
OFF
0.00s
0.00s
0.00s
0.00s
000.00Hz
00.16.5A