Hitachi SJ700-2 instruction manual Acceleration/deceleration curve selection, Inverter

Chapter 4 Explanation of Functions

4.2.25 Acceleration/deceleration curve selection		Related code
	A097: Acce	leration curve sel	ection
You can set different patterns of motor acceleration and	A098: Deceleration curve setting
deceleration according to the type of system to be driven by the	A131: Acceleration curve constants setting
	A132: Deceleration curve constants setting
inverter.	A150: Curvature for EL-S-curve acceleration
	A151: Curvature for EL-S-curve acceleration
Use functions "A097" and "A098" to select acceleration and	A152: Curvature for EL-S-curve deceleration
deceleration patterns, respectively.	A153: Curvature for EL-S-curve deceleration

You can individually set an acceleration pattern for acceleration and a deceleration pattern for deceleration.

When the acceleration/deceleration pattern is set other than 00 (linear) using analog input as frequency source is to be avoided because it prolongs the acceleration or deceleration time.

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Item	Function code	Data or range of data	Description
		00	Linear acceleration/deceleration
Acceleration/deceleration	A097/A098	01	S-curve acceleration/deceleration
		02	U-curve acceleration/deceleration
curve selection
		03	Inverted-U-curve acceleration/deceleration
		04	EL-S-curve acceleration/deceleration
Acceleration/deceleration			01 (small degree of swelling)
	A131/ A132	01 to 10
curve constants setting
			10 (large degree of swelling)
Curvature for EL-S-curve	A150/A151	0 to 50 (%)	Curvature of EL-S curve (for acceleration)
acceleration 1/2
Curvature for EL-S-curve	A152/A153	0 to 50 (%)	Curvature of EL-S curve (for deceleration)
deceleration 1/2

(1)Acceleration/deceleration pattern selection

Select acceleration and deceleration patterns with reference to the following table:

Setting	00	01	02	03	04
Curve	Linear	S curve	U curve	Inverted-U curve	EL-S curve

A097

(accele-

ration

pattern)

Output frequency

Time

Output frequency

Time

Output frequency

Time

Output frequency

Time

Output frequency

Time

A098

(decele-

ration

pattern)

Output frequency

Time

Output frequency

Time

Output frequency

Time

Output frequency

Time

Output frequency

Time

	With this pattern, the	This pattern is	This pattern is effective for the tension control
	motor is accelerated or	effective for preventing	on a winding machine driven by the inverter (to
	decelerated linearly	the collapse of cargo	prevent cutting of the object to be wound).
Descrip- until its speed reaches		carried by a lift or
tion	the set output	conveyor driven by the
	frequency.	inverter.

This pattern is similar to the S-curve pattern for the shockless starting and stopping of the motor, except that the middle section of this pattern is linear.

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