Hitachi SJ300 Series Voltage, Function, Automatic, Accel/Decel, Energy Savings, Mode / Optimal, Regulation (AVR), SRW Display, SRW Display, “A” Function, “A” Function

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SJ300 Inverter

Automatic

Voltage

Regulation (AVR)Function

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 installation 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.

	“A” Function		Run		Defaults
			Mode				Units	SRW Display
Func.			Edit	–FE	–FU	–FR
	Name	Description
Code			Lo Hi	(EU)	(US)	(JP)
A081	AVR function select	Automatic (output) voltage	✘ ✘	00	00	00	—	>A081 AVR
		regulation, selects from						MODE	DOFF
		three type of AVR functions,
		three option codes:
		00 AVR enabled
		01 AVR disabled								DriveConfiguring Parameters
		02 AVR enabled except
		during deceleration
A082	AVR voltage select	200V class inverter settings:	✘ ✘	230/	230/	200/	V	>A082 AVR
		200/215/220/230/240		400	460	400		AC	230
		400V class inverter settings:
		380/400/415/440/460/
		480

Energy SavingsMode / OptimalAccel/Decel

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.

“A” Function

Run

Defaults

Mode

Units

SRW Display

Func.

Edit

–FE

–FU

–FR

Name

Description

Code

Lo Hi

(EU)

(US)

(JP)

A085

Operation mode

Three options:

✘ ✘

00

00

00

—

>A085 RUN

selection

00 Normal operation

MODE

NOR

01 Energy-saver operation

02 Optimal accel/decel

operation

A086

Energy saving mode

Range is 0.0 to 100 sec.

✔ ✔

50.0

50.0

50.0

sec.

>A086 RUN

tuning

ECO

0050.0s

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.