“A” Group: Standard Functions
Configur
ing Dr
iv
e
P
a
ra
meters
3–24
NOTE:
DO NOT use Optimal Accel/Decel (A085 = 02) when an application...
• has a requirement for constant acceleration or deceleration
• has a load inertia more than (approx.) 20 times the motor inertia
• uses internal or external regenerative braking
• uses any of the vector control modes (A044 = 03, 04, or 05). This function is ONLY
compatible with V/F control.
NOTE:
If the load exceeds the rating of the inverter, the acceleration time may be increased.
NOTE:
If using a motor with a capacity that is one size smaller than the inverter rating, enable
the Overload Restriction function (B021/B024) and set the Overload Restriction Level (B022/
B025) to 1.5 times the motor nameplate current.
NOTE:
Be aware that the acceleration and deceleration times will vary, depending on the
actual load conditions during each individual operation of the inverter.
Second
Acceleration and
Deceleration
Functions
The SJ700
2
inverter features two-stage acceleration and deceleration ramps. This gives flexibil-
ity in the profile shape. You can specify the frequency transition point, the point at which the
standard acceleration (F002) or deceleration (F003) changes to the second acceleration (A092)
or deceleration (A093). These profile options are also available for the second motor settings
and third motor settings. All acceleration and deceleration times are time to ramp from zero
speed to full speed or full speed to zero speed. Select a transition method via A094 as depicted
below. Be careful not to confuse the
second acceleration/deceleration settings
with settings for
the
second motor
!
Func.
Code
Name/
Description
Keypad
Range and Settings
Defaults
Run
Mode
Edit
Lo Hi
SRW
OPE
FEF2
FE2
(EU)
FUF2
FU2
(USA)
FF2
F2
(Jpn)
A092
Acceleration (2) time setting
0.01 to 99.99, 100.0 to 999.9,
1000. to 3600. (seconds)
15.0
15.0
15.0
✔ ✔
Duration of 2nd segment of acceleration
A292
Acceleration (2) time setting, 2nd motor
0.01 to 99.99, 100.0 to 999.9,
1000. to 3600. (seconds)
15.0
15.0
15.0
✔ ✔
Duration of 2nd segment of acceleration, 2nd motor
A392
Acceleration (2) time setting, 3rd motor
0.01 to 99.99, 100.0 to 999.9,
1000. to 3600. (seconds)
15.0
15.0
15.0
✔ ✔
Duration of 2nd segment of acceleration, 3rd motor
Accel 1
Accel 2
2CH
input
Accel 1
Accel 2
Frequency
transition point
A095
A094=00
A094=01
t
t
frequency
frequency
0
0
1