Hitachi SJ700-2 - Manual (Page 94)

Chapter 4 Explanation of Functions
4.2.25 Acceleration/deceleration curve selection Related code
A097: Acceleration curve selection
A098: Deceleration curve setting
A131: Acceleration curve constants setting
A132: Deceleration curve constants setting
A150: Curvature for EL-S-curve acceleration 1
A151: Curvature for EL-S-curve acceleration 2
A152: Curvature for EL-S-curve deceleration 1
A153: Curvature for EL-S-curve deceleration 2
You can set different patterns of motor acceleration and
deceleration according to the type of system to be driven by the
inverter.
Use functions "A097" and "A098" to select acceleration and
deceleration patterns, respectively.
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.
Item Function code Data or range of data Description
00 Linear acceleration/deceleration
01 S-curve acceleration/deceleration
02 U-curve acceleration/deceleration
03 Inverted-U-curve acceleration/deceleration
Acceleration/deceleration
curve selection
A097/A098
04 EL-S-curve acceleration/deceleration
Acceleration/deceleration
curve constants setting
A131/ A132 01 to 10
01 (small degree of swelling)
10 (large degree of swelling)
Curvature for EL-S-curve
acceleration 1/2
A150/A151
0 to 50 (%)
Curvature of EL-S curve (for acceleration)
Curvature for EL-S-curve
deceleration 1/2
A152/A153
0 to 50 (%)
Curvature of EL-S curve (for deceleration)
(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)
A098
(decele-
ration
pattern)
Descrip-
tion
With this pattern, the
motor is accelerated or
decelerated linearly
until its speed reaches
the set output
frequency. This pattern is
effective for preventing
the collapse of cargo
carried by a lift or
conveyor driven by the
inverter. This pattern is effective for the tension control
on a winding machine driven by the inverter (to
prevent cutting of the object to be wound). 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.
Outpu
t frequ
ency
Time
Outpu
t frequ
ency
Time
Outpu
t frequ
ency
Time
Outpu
t frequ
ency
Time
Outpu
t frequ
ency
Time
Outpu
t frequ
ency
Time
Outpu
t frequ
ency
Time
Outpu
t frequ
ency
Time
Outpu
t frequ
ency
Time
Outpu
t frequ
ency
Time
4 - 3
1