Fuji Electric FRENIC-HVAC User Manual page 44

Item
• SW50 ("Switch to commercial power 50 Hz") or SW60 ("Switch to commercial power
Run by commercial
60 Hz") switches the inverter to 50 or 60 Hz output, respectively.
power supply
• Built-in commercial power supply switching sequence
Slip compensation Compensates for decrease in speed according to the load.
Torque limiter Switchable between 1st and 2nd torque limit values.
Software current Automatically reduces the frequency so that the output current becomes lower than the
limiter preset operation level.
• PID processor for process control
• Switchable between forward and reverse operations
• Slow flowrate stop function (Pressurized operation is possible before the slow flowrate
stop.)
• Automatic frequency updating function for slow flowrate stop
• PID command: Keypad, analog input (terminals [12], [C1] and [V2]), RS-485
communication, Terminal command UP/DOWN control
• PID feedback value (terminals [12], [C1] and [V2])
• Alarm output (absolute value alarm, deviation alarm)
PID control
• PID feedback error detection
• Sensor input amount scaling
• Sensor input amount conversion/calculation
• PID output limiter
• Integration reset/hold
• Anti-reset wind-up function
• PID auto-tuning function
• Application-specific initialization
• External PID processor for process control/ On/ Off controller (3 channels)
The inverter automatically searches for the idling motor speed to be harmonized and starts
Auto search for idling
to drive it without stopping it.
motor speed
(Motor constants need tuning: Auto-tuning (offline))
• 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.
Automatic deceleration (It is possible to select forcible deceleration to be applied when the deceleration time
becomes three times longer.)
control
• 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 Increases the motor loss during deceleration to reduce the regenerative energy to the
(improved braking inverter to avoid an overvoltage trip.
capacity)
Auto energy saving Controls the output voltage to minimize the total sum of the motor loss and inverter loss.
operation
Overload prevention If the ambient temperature or IGBT joint temperature increases due to overload, the
control inverter lowers the output frequency to avoid overload.
Voltage Shortage
Continues to run by decreasing the output frequency when the input voltage drops.
Avoidance Operation
Input Phase Loss
Selectable from trip or continuous low power operation.
Protection Avoidance
Operation
Auto-tuning (offline) Tuning the motor while the motor is stopped or running, for setting up motor parameters.
• Detects the inverter internal temperature and stops the cooling fan when the
Cooling fan ON/OFF
temperature is low.
control
• The fan control signal can be output to an external device.
Transfers the status of an external digital signal connected to the universal digital input
Universal DI
terminal to the host controller.
Outputs a digital command signal sent from the host controller to the universal digital
Universal DO
output terminal.
Outputs an analog command signal sent from the host controller to the analog output
Universal AO
terminal.
Explanation
2-11
2.2 Common Specifications
Remarks