Hitachi L100 Instruction Manual page 71

DC Braking Settings
Func.
Code
A51
A52
A53
A54
A55
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The DC braking feature provides
additional stopping power when compared
to just a normal deceleration to a stop. DC
braking is particularly useful at the low
frequency end of the deceleration ramp
where there is little or no motor torque
available for stopping. If you enable DC
braking, it turns on during deceleration at a
frequency you can specify. If desirable,
you can specify a delay time during which the motor coasts (free runs) before DC
braking helps stop the rotation.
Most importantly, the force and duration of DC braking are adjustable. Be careful to not
specify a long braking time that causes 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 page 4–17). Also refer to the motor manufacturer's specifications
for duty-cycle recommendations during DC braking.
"A" Function
Name
DC braking enable Two options; select codes:
00... Disable
01... Enable
DC braking frequency The frequency at which DC
setting braking occurs,
range is 0.5 to 10 Hz
DC braking wait time The delay from the end of Run
command to start of DC
braking (motor free runs until
DC braking begins)
DC braking force Applied level of DC braking
setting force, settable from 0 to 100%
DC braking time Sets the duration for DC
setting braking, range is 0.1 to 60.0
seconds
+
Running
0
–
Run-
time
Description
Edit
3–15
L100 Inverter
Free run DC braking
time
A53 A55
Defaults DOP,DRW,DOP+
EU/ Func.
Units Name
US Code
00 — F-20 DCB SW
0.5 Hz F-20 DCB F
0.0 sec. F-20 DCB
WAIT
0 % F-20 DCB V
0.0 sec. F-20 DCB T