Hitachi SJ7002 Series Instruction Manual page 109

3–26
"A" Group: Standard Functions
Accel/Decel
Characteristics
Set value
Curve
Accel
A97
Decel
A98
Typical
applications
Func.
Code Description
A097 Acceleration curve selection
Set the characteristic curve of
Accel1 and Accel2
A098 Deceleration curve selection
Set the characteristic curve of
Decel1 and Decel2
Clearwater Tech - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.clrwtr.com - Email: info@clrwtr.com
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
Keypad
Name/
SRW
Linear
S-curve
U-curve
RU-curve
EL-curve
Linear
S-curve
U-curve
RU-curve
EL-curve
01 02
Sigmoid U-shape
Output frequency
time
Output frequency
time
Tension control for winding applications, web
presses, roller/accumulators
Range and Settings
OPE
00
Linear
0 1
S-curve
02
U-shape
03
Reverse U-shape
04
EL-S curve
00
Linear
0 1
S-curve
02
U-shape
03
Reverse U-shape
04
EL-S curve
03
Reverse U-shape
Output frequency
time time
Output frequency
time time
Defaults Run
Mode
xFE2 xFU2 xFF2
Edit
(EU) (USA) (Jpn) Lo Hi
✘ ✘
00 00 00
✘ ✘
00 00 00