Fuji Electric FRENIC-AQUA series, User Manual

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2-6
Item Explanation Remarks
Auto search for idling
motor speed
The inverter automatically searches for the idling motor speed to be harmonized and starts
to drive it without stopping it.
(Motor constants need tuning: Auto-tuning (offline)
Automatic deceleration
control
• If the DC link bus voltage or calculated torque exceeds the automatic deceleration level
during deceleration, the inverter automatically prolongs the deceleration time to avoid
an overvoltage trip.
(It is possible to select forcible deceleration to be applied when the deceleration time
becomes three times longer.)
• If the calculated torque exceeds automatic deceleration level during constant speed
operation, the inverter avoids an overvoltage trip by increasing the frequency.
• The automatic deceleration level can be specified.
Deceleration
characteristic
(improved braking
capacity)
Increases the motor loss during deceleration to reduce the regenerative energy to the
inverter to avoid an overvoltage trip.
Auto energy saving
operation
Controls the output voltage to minimize the total sum of the motor loss and inverter loss.
(Auto energy saving mode can be switched ON or OFF by a digital input signal sent from
an external device.)
Overload prevention
control If the ambient temperature or IGBT joint temperature increases due to overload, the
inverter lowers the output frequency to avoid overload.
Continue to run at low
voltage Continues to run by decreasing the output frequency when the input voltage drops.
(Available soon)
Continue to run at input
phase loss After an alarm output, there are two choices: Stop due to a trip or Continue to run (at low
output or normal output) with a warning output. (Available soon)
Auto-tuning (offline) Tuning the motor while the motor is stopped or running, for setting up motor parameters.
Cooling fan ON/OFF
control
• Detects the inverter internal temperature and stops the cooling fan when the
temperature is low.
• The fan control signal can be output to an external device.
Universal DI
Transfers the status of an external digital signal connected to the universal digital input
terminal to the host controller.
Universal DO
Outputs a digital command signal sent from the host controller to the universal digital
output terminal.
Universal AO
Outputs an analog command signal sent from the host controller to the analog output
terminal.
Restriction on rotation
direction
Reverse or forward rotation prevention.
Dew condensation
prevention When the motor is stopped, current is automatically supplied to the motor to keep the
motor warm and avoid condensation.
Customizable logic
interface 2 inputs, 1 output, logical operation, timer function, four arithmetic operations of analog
amount, comparison and conversion, choice of maximum/minimum, 14 steps
Pump control
• Cascade control
(FIXED: 8 + 1 units, FLOATING: 4 units (when optional cards are used))
• Running time equalization
• Anti-jam function
• Auxiliary motor control • Check valve protection
• Control of maximum starts per hour • Boost function
• Dry pump detection
• Filter clogging prevention
• End of curve detection
Fire mode
(Forced operation)
Ignores the inverter alarm and forcibly performs retry operation.
Real-time clock (RTC)
• Displays the current date & time and the alarm info date & time, and enables timer
operation. (The RTC can be maintained by an optional battery.)
• Has the correction function for daylight saving time (DST).
Allows
the
inverter
to keep
time.
Timer operation
• 4 timers for operation in a week.
• Maximum of 20 pause dates per year.
• Capable of running/stopping the inverter or outputting external signals.
Password function Protects function code data from unintentional change and hides data (at 2 levels).
Control
Mutual operation RTU communication allows up to three inverters to connect with each other.