Automatic Voltage Regulation (Avr) Function; Energy Savings Mode / Optimal Accel/Decel - Hitachi SJ300 Series Instruction Manual

Automatic
Voltage
Regulation (AVR)
Function
"A" Function
Func.
Name
Code
A081 AVR function select
A082 AVR voltage select
Energy Savings
Mode / Optimal
Accel/Decel
"A" Function
Func.
Name
Code
A085 Operation mode
selection
A086 Energy saving mode
tuning
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.
Description
Automatic (output) voltage
regulation, selects from
three type of AVR functions,
three option codes:
00 AVR enabled
01 AVR disabled
02 AVR enabled except
during deceleration
200V class inverter settings:
200/215/220/230/240
400V class inverter settings:
380/400/415/440/460/
480
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.
Description
Three options:
00 Normal operation
01 Energy-saver operation
02 Optimal accel/decel
operation
Range is 0.0 to 100 sec.
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.
Defaults
Run
Mode
Edit
–FE –FU –FR
Lo Hi
(EU) (US) (JP)
✘ ✘
00 00 00
✘ ✘
230/ 230/ 200/
400 460 400
Defaults
Run
Mode
Edit
–FE –FU –FR
Lo Hi
(EU) (US) (JP)
✘ ✘
00 00 00
✔ ✔
50.0 50.0 50.0
3–23
SJ300 Inverter
SRW Display
Units
— >A081 AVR
MODE DOFF
V >A082 AVR
AC 230
Units SRW Display
— >A085 RUN
MODE NOR
sec. >A086 RUN
ECO 0050.0s