Hitachi WJ200 Series Instruction Manual page 108

CAUTION: Be careful to avoid specifying a braking time that is long enough to cause
motor overheating. If you use DC braking, we recommend using a motor with a built-in
thermistor, and wiring it to the inverter's thermistor input (see "Thermistor Thermal
Protection" in chapter 4). Also refer to the motor manufacturer's specifications for
duty-cycle recommendations during DC braking.
DC braking performance at start can also be set separately (a057 and a058).
And carrier frequency of DC braking performance can also be set separately (a059).
CAUTION: Be careful to avoid specifying a braking carrier frequency that is high
enough to cause inverter and motor overheating. If you use DC braking, we recommend
using a motor with a built-in thermistor, and wiring it to the inverter's thermistor input
(see "Thermistor Thermal Protection" in chapter 4). Also refer to the motor
manufacturer's specifications for duty-cycle recommendations during DC braking.
Func.
Name
Code
DC braking enable
A051
DC braking frequency
A052
DC braking wait time
A053
DC braking force for
A054
deceleration
DC braking time for
A055
deceleration
DC braking / edge or level
A056
detection for [DB] input
DC braking force at start
a057
DC braking time at start
a058
Carrier frequency during DC
a059
braking
"A" Function
Description
Three options; select codes:
00...Disable
01...Enable during stop
02...Frequency detection
The frequency at which DC
braking begins,
range is from the start
frequency (B082) to 60Hz
The delay from the end of
controlled deceleration to start
of DC braking (motor free runs
until DC braking begins),
range is 0.0 to 5.0 sec.
Level of DC braking force,
settable from 0 to 100%
Sets the duration
braking, range is from 0.0 to
60.0 seconds
Two options; select codes:
00...Edge detection
01...Level detection
Level of DC braking force at
start, settable from 0 to 100%
Sets the duration
braking, range is from 0.0 to
60.0 seconds
Carrier frequency of DC
braking performance, range is
from 2.0 to 15.0kHz
Run
Mode
Lnitial data
Edit
0.5
50.
for DC
for DC
3−27
Defaults
Units
00 −
Hz
0.0 sec.
%
0.5 sec.
01 −
0. %
0.0 sec.
5.0 sec.