Hitachi SJ300 Series Accel/Decel Characteristics

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“A” Group: Standard Functions

Accel/Decel Characteristics

Standard (default) acceleration and deceleration is linear with time. The inverter CPU can also calculate other curves shown in the graphs below. The sigmoid, U-shape, and reverse U-shape curves are useful for favoring the load characteristics in particular applications. Curve settings for acceleration and deceleration are independently selected via parameters A097 and A098, respectively. You can use the same or different curve types for acceleration and deceleration.

Configuring Drive Parameters

Set value

00

01

02

03

Curve

Linear

Sigmoid

U-shape

Reverse U-shape

Output frequency

Output frequency

Output frequency

Output frequency

Accel

A97

time

time

time

time

Output frequency

Output frequency

Output frequency

Output frequency

Decel

A98

time

time

time

time

Typical

Linear acceleration

Avoid jerk on start/stop

Tension control for winding applications, web

and deceleration for

for elevators; use for

presses, roller/accumulators

applications

general-purpose use

delicate loads on con-

veyors

	“A” Function			Run		Defaults
				Mode				Units	SRW Display
Func.				Edit	–FE	–FU	–FR
	Name		Description
Code				Lo Hi	(EU)	(US)	(JP)
A097	Acceleration curve	Set the characteristic curve		✘ ✘	00	00	00	—	>A097 ACCEL
	selection	of Accel1 and Accel2, four							LINE	Linear
		options:
		00	Linear
		01	S-curve
		02	U-shape
		03	Reverse U-shape
A098	Deceleration curve	Set the characteristic curve		✘ ✘	00	00	00	—	>A098 DECEL
	selection	of Decel1 and Decel2, four							LINE	Linear
		options:
		00	Linear
		01	S-curve
		02	U-shape
		03	Reverse U-shape