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Chapter 4
4.2.25 Acceleration/deceleration curve selection
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
Acceleration/deceleration
curve selection
Acceleration/deceleration
curve constants setting
Curvature for EL-S-curve
acceleration 1/2
Curvature for EL-S-curve
deceleration 1/2
(1) Acceleration/deceleration pattern selection
Select acceleration and deceleration patterns with reference to the following table:
Setting
00
Curve
Linear
A097
(accele-r
ation
pattern)
Time
A098
(decele-r
ation
pattern)
Time
With this pattern, the
motor is accelerated or
decelerated linearly until
Descrip-
its speed reaches the set
tion
output frequency.
Function code
Data or range of data
A097/A098
A131/ A132
01 to 10
0 to 50 (%)
A150/A151
0 to 50 (%)
A152/A153
01
S curve
Time
Time
This pattern is effective
This pattern is effective for the tension control on a
for preventing the
winding machine driven by the inverter (to prevent
collapse of cargo carried
cutting of the object to be wound).
by a lift or conveyor
driven by the inverter.
Explanation of Functions
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
00
Linear acceleration/deceleration
01
S-curve acceleration/deceleration
02
U-curve acceleration/deceleration
03
Inverted-U-curve acceleration/deceleration
04
EL-S-curve acceleration/deceleration
01 (small degree of swelling)
10 (large degree of swelling)
Curvature of EL-S curve (for acceleration)
Curvature of EL-S curve (for deceleration)
02
U curve
Inverted-U curve
Time
Time
4-31
Related code
Description
03
04
EL-S curve
Time
Time
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.
Time
Time
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