Dc braking settings – Hitachi L100 User Manual
Page 71
L100 Inverter
Confi
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3–15
DC Braking Settings
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.
DC braking
A53
A55
Free run
Running
+
–
0
time
“A” Function
Run-
time
Edit
Defaults
DOP,DRW,DOP+
Func.
Code
Name
Description
EU/
US
Units
Func.
Code
Name
A51
DC braking enable
Two options; select codes:
00... Disable
01... Enable
✘
00
—
F-20
DCB SW
A52
DC braking frequency
setting
The frequency at which DC
braking occurs,
range is 0.5 to 10 Hz
✘
0.5
Hz
F-20
DCB F
A53
DC braking wait time
The delay from the end of Run
command to start of DC
braking (motor free runs until
DC braking begins)
✘
0.0
sec.
F-20
DCB
WAIT
A54
DC braking force
setting
Applied level of DC braking
force, settable from 0 to 100%
✘
0
%
F-20
DCB V
A55
DC braking time
setting
Sets the duration for DC
braking, range is 0.1 to 60.0
seconds
✘
0.0
sec.
F-20
DCB T
Technologies Inc.
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