SJ700
2
Inverter
Configur
ing Dr
iv
e
P
a
ra
met
e
rs
3–23
Automatic
Voltage
Regulation (AVR)
Function
The Automatic Voltage Regulation (AVR) feature keeps the inverter output voltage at a
relatively constant amplitude during power input fluctuations. This can be useful if the installa-
tion is subject to input voltage disturbances. However, the inverter cannot boost its motor
output to a voltage higher than the power input voltage. If you enable this feature, be sure to
select the proper voltage class setting for your motor.
Energy Savings
Mode / Optimal
Accel/Decel
Energy Savings Mode
– This function allows the inverter to deliver the minimum power
necessary to maintain speed at any given frequency. This works best when driving variable
torque characteristic loads such as fans and pumps. Parameter A085=01 enables this function
and A086 controls the degree of its effect. A setting of 0.0 yields slow response but high
accuracy, while a setting of 100 will yield a fast response with lower accuracy.
Optimal Accel/Decel Operation
– This feature uses “fuzzy” logic to optimize acceleration
and deceleration curves in real time. It is enabled by A085=02. Optimal accel/decel operation
automatically adjusts the acceleration and deceleration times in response to changes in load or
inertia to take advantage of the maximum output current capability of the inverter. In general,
optimal accel/decel will allow for the shortest accel and decel times based on the actual load
conditions. The function continuously monitors output current and DC bus voltage to avoid
reaching their respective trip levels.
NOTE:
In this mode, the settings of acceleration and deceleration times (F002 and F003) are
disregarded.
The acceleration time is controlled to maintain output current below the level set by the
Overload Restriction Function if enabled (Parameters B021/B024, B022/B025, and B023/
B026). If Overload Restriction is not enabled, then the current limit used is 150% of the
inverter’s rated output current.
The deceleration time is controlled so that the output current is maintained below 150% of
the inverter’s rated current,
and
the DC bus voltage is maintained below the OV Trip level
(358V or 770V).
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)
A081
AVR function select
ON
00
AVR enabled
00
00
02
✘ ✘
Automatic (output) voltage
regulation
OFF
0 1
AVR disabled
DOFF
02
AVR enabled except during deceleration
A082
AVR voltage select
200V class inverter settings:
200/215/220/230/240 (V)
400V class inverter settings:
380/400/415/440/460/480 (V)
230/
400
230/
460
200/
400
✘ ✘
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)
A085
Operation mode selection
NOR
00
Normal operation
00
00
00
✘ ✘
ECO
0 1
Energy-saver operation
✘ ✘
FUZZY
02
Optimal accel/decel operation
✘ ✘
A086
Energy saving mode tuning
0.0 to 100 (seconds)
50.0
50.0
50.0
✔ ✔