Hitachi SJ7002 Series Instruction Manual page 106

Automatic
Voltage
Regulation (AVR)
Function
Func.
Code
A081 AVR function select
Automatic (output) voltage
regulation
A082 AVR voltage select
Energy Savings
Mode / Optimal
Accel/Decel
Func.
Code
A085 Operation mode selection
A086 Energy saving mode tuning
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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.
Keypad
Name/
Description
SRW
ON
OFF
DOFF
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.
Name/
Description
SRW
NOR
ECO
FUZZY
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).
Range and Settings
OPE
00
AVR enabled
0 1
AVR disabled
02
AVR enabled except during deceleration
200V class inverter settings:
200/215/220/230/240 (V)
400V class inverter settings:
380/400/415/440/460/480 (V)
Keypad
Range and Settings
OPE
00
Normal operation
0 1
Energy-saver operation
02
Optimal accel/decel operation
0.0 to 100 (seconds)
3–23
SJ700 Inverter
2
Defaults
Run
Mode
FEF2 FUF2 FF2
Edit
FE2 FU2 F2
Lo Hi
(EU) (USA) (Jpn)
✘ ✘
00 00 02
✘ ✘
230/ 230/ 200/
400 460 400
Defaults
Run
Mode
FEF2 FUF2 FF2
Edit
FE2 FU2 F2
Lo Hi
(EU) (USA) (Jpn)
✘ ✘
00 00 00
✘ ✘
✘ ✘
✔ ✔
50.0 50.0 50.0