“A” Group: Standard Functions
Configur
ing Dr
iv
e
P
a
ra
meters
3–26
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.
time
Output frequency
time
Output frequency
time
Output frequency
time
Output frequency
time
Output frequency
time
Output frequency
time
Output frequency
time
Output frequency
Linear
Sigmoid
U-shape
Reverse U-shape
Accel
A97
Decel
A98
00
Set value
Curve
01
02
03
Linear acceleration
and deceleration for
general-purpose use
Avoid jerk on start/stop
for elevators; use for
delicate loads on con-
veyors
Tension control for winding applications, web
presses, roller/accumulators
Typical
applications
Func.
Code
Name/
Description
Keypad
Range and Settings
Defaults
Run
Mode
Edit
Lo Hi
SRW
OPE
xFE2
(EU)
xFU2
(USA)
xFF2
(Jpn)
A097
Acceleration curve selection
Linear
00
Linear
00
00
00
✘ ✘
Set the characteristic curve of
Accel1 and Accel2
S-curve
0 1
S-curve
U-curve
02
U-shape
RU-curve
03
Reverse U-shape
EL-curve
04
EL-S curve
A098
Deceleration curve selection
Linear
00
Linear
00
00
00
✘ ✘
Set the characteristic curve of
Decel1 and Decel2
S-curve
0 1
S-curve
U-curve
02
U-shape
RU-curve
03
Reverse U-shape
EL-curve
04
EL-S curve