8.3 Common Specifications
8-9
Chap. 8 SPECIFICATIONS
Restart after momentary
power failure *1
• Trip at power failure: The inverter trips immediately after power failure.
• Trip at power recovery: Coast-to-stop at power failure and trip at power
recovery
• Deceleration stop: Deceleration stop at power failure, and trip after
stoppage. *2
• Start at the frequency selected before momentary stop: Coast-to-stop at
power failure and start after power recovery at the frequency selected before
momentary stop.
• Start at starting frequency: Coast-to-stop at power failure and start at the
starting frequency after power recovery.
Current limit *1
(Hardware current limiting)
Hardware current limiting is used avoiding over current tripping of the
inverter, when impact load change or momentary power failure that can be
responded software current limiting. (Hardware current limiting can be
inactive.)
Slip compensation *1 • Compensate the lowering the motor speed and get the stabilized operation.
Current limiter • Control output current so that output current is preset limiting value or less.
PID control
PID control for process control is possible.
• PID command: Keypad, Analog input (Terminal 12,C1), RS-485
communications
• Feed back value: Analog input (Terminal 12,C1)
• Accessory functions
Stop for Slow flow rate function, Normal operation/inverse operation
Integration reset/hold
Automatic deceleration
• If the calculated torque exceeds automatic deceleration level, the inverter
avoids overvoltage trip by automatically controlling the frequency. *1
• If the DC link bus voltage exceeds the overvoltage limitation level during
deceleration, the inverter automatically prolongs the deceleration time to
three times to avoid overvoltage trip.
Deceleration characteristics
Make the motor loss increase during deceleration so as to reduce the
regenerative energy from motor and avoid Overvoltage trip.
Auto-energy saving
operation *1
Control the output voltage so as to minimize the sum of motor loss and
inverter loss at constant speed.
Active drive
The output frequency is automatically reduced to suppress the overload
protection trip of the inverter caused by an increase in the IGBT junction
temperature or the ambient temperature, motor load or the like.
Off-line tuning *1 Tunes r1, Xσ, and no-load current.
Tunes r1, Xσ, no-load current, and slip frequency. *2
Cooling fan ON/OFF control
Detects inverter internal temperature and stops cooling fan when the
temperature is low.
Second motor parameters • A single inverter can drive two motors by switching.
Only induction motor can be set as second motor.
The function data set for second motor are base frequency, rated current,
torque boost, Electronic overload protection for motor, slip compensation,
etc.
• Second motor parameters can be preset in the inverter. Auto-tuning is
possible.
Control
Limiting the direction of the
motor rotation
Reverse rotation inhibited/Forward rotation inhibited selectable.
*1 Available only for induction motor drive.
*2 Available in the ROM version 0500 or later.
Item Explanation
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