Hitachi SJ300-037HFE 사용자 설명서

SJ300 Inverter

Configur

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The automatic voltage regulation (AVR) feature keeps the inverter output voltage at a 
relatively constant amplitude during power input fluctuations. This can be useful if the installa-
tion is subject to input voltage disturbances. However, the inverter cannot boost its motor 
output to a voltage higher than the power input voltage. If you enable this feature, be sure to 
select the proper voltage class setting for your motor.

Energy Savings Mode – This function allows the inverter to deliver the minimum power 
necessary to maintain speed at any given frequency. This works best when driving variable 
torque characteristic loads such as fans and pumps. Parameter A085=01 enables this function 
and A086 controls the degree of its effect. A setting of 0.0 yields slow response but high 
accuracy, while a setting of 100 will yield a fast response with lower accuracy.

Optimal Accel/Decel Operation – This feature uses “fuzzy” logic to optimize acceleration 
and deceleration curves in real time. It is enabled by A085=02. Optimal accel/decel operation 
automatically adjusts the acceleration and deceleration times in response to changes in load or 
inertia to take advantage of the maximum output current capability of the inverter. In general, 
optimal accel/decel will allow for the shortest accel and decel times based on the actual load 
conditions. The function continuously monitors output current and DC bus voltage to avoid 
reaching their respective trip levels.

NOTE: In this mode, the settings of acceleration and deceleration times (F002 and F003) are 
disregarded.

A081 AVR function select

Automatic (output) voltage 
regulation, selects from 
three type of AVR functions, 
three option codes:
00 AVR enabled
01 AVR disabled
02 AVR enabled except 

during deceleration

✘ ✘

00

00

00

—

>A081 AVR

MODE        DOFF

A082 AVR voltage select

200V class inverter settings:

200/215/220/230/240

400V class inverter settings:

380/400/415/440/460/
480

✘ ✘

230/

400

230/

460

200/

400

V

>A082 AVR

AC          230

A085 Operation mode

selection

Three options:
00 Normal operation
01 Energy-saver operation
02 Optimal accel/decel 

operation 

✘ ✘

00

00

00

—

>A085 RUN

MODE       NOR

A086 Energy saving mode 

tuning

Range is 0.0 to 100 sec.

✔ ✔ 50.0 50.0 50.0

sec.

>A086 RUN

ECO      0050.0s