Hitachi L200 ユーザーズマニュアル

“A” Group: Standard Functions

Configur

ing

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The DC braking feature can provide 
additional stopping torque when 
compared to a normal deceleration to a 
stop. DC braking is particularly useful 
at low speeds when normal decelera-
tion torque is minimal. When you 
enable DC braking, the inverter injects 
a DC voltage into the motor windings 
during deceleration below a frequency you can specify (A052). The braking power 
(A054) and duration (A055) can both be set. You can optionally specify a wait time 
before DC braking (A053), during which the motor will free run (coast).

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 

). Also refer to the motor manufacturer’s specifications for 

duty-cycle recommendations during DC braking.

t

0

+

–

A053

A055

A051 DC braking enable

Two options; select codes:
00... Disable
01... Enable

✘

00

00

—

DCB Mode     OFF

A052 DC braking frequency 

setting

The frequency at which DC 
braking begins,
range is from the start 
frequency (B082) to 60 Hz

✘

0.5

0.5

Hz

DCB F   0000.5Hz

A053 DC braking wait time

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.

✘

0.0

0.0

sec.

DCB Wait 0000.0s

A054 DC braking force for 

deceleration

Level of DC braking force, 
settable from 0 to 100% 

✘

0.

0.

%

DCB V     00000%

A055 DC braking time for 

deceleration

Sets the duration for DC 
braking, range is 0.0 to 60.0 
seconds

✘

0.0

0.0

sec.

DCB T    0000.0s

A056 DC braking / edge or 

level detection for [DB] 
input

Two options; select codes:
00... Edge detection
01... Level detection

✘

01

01

—

DCB KIND   LEVEL