Accel/Decel Characteristics - Hitachi SJ300 Series Instruction Manual

3–26
"A" Group: Standard Functions
Accel/Decel
Characteristics
Set value
Curve
Accel
A97
Decel
A98
Typical
applications
Func.
Name
Code
A097 Acceleration curve
selection
A098 Deceleration curve
selection
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.
00
Linear
Output frequency Output frequency
time
Output frequency Output frequency
time
Linear acceleration Avoid jerk on start/stop
and deceleration for for elevators; use for
general-purpose use delicate loads on con-
veyors
"A" Function
Description
Set the characteristic curve
of Accel1 and Accel2, four
options:
00 Linear
01 S-curve
02 U-shape
03 Reverse U-shape
Set the characteristic curve
of Decel1 and Decel2, four
options:
00 Linear
01 S-curve
02 U-shape
03 Reverse U-shape
01 02
Sigmoid U-shape
Output frequency
time
Output frequency
time
Tension control for winding applications, web
presses, roller/accumulators
Defaults
Run
Mode
Edit
–FE –FU
Lo Hi
(EU) (US)
✘ ✘
00 00
✘ ✘
00 00
03
Reverse U-shape
Output frequency
time
Output frequency
time
SRW Display
Units
–FR
(JP)
00 — >A097 ACCEL
LINE Linear
00 — >A098 DECEL
LINE Linear
time
time