Regenerative overflix upper limit

Function
These parameters are used to temporarily maintain the output frequency constant or increase the frequency to prevent overvoltage tripping when the voltage in the DC section rises during deceleration or while constant speed run is in progress (overvoltage limit operation).
Important:
• During overvoltage limit operation, deceleration time may be longer than the time set.
• During overvoltage limit operation, the overvoltage (OP) pre-alarm is displayed.

F305 Parameter Range:
0: Enabled
1: Disabled
2: Enabled (quick deceleration)
3: Enabled (dynamic quick deceleration)

Difference in specific settings
[F305: Overvoltage limit operation] = "2"
This value sets quick deceleration.
When the voltage reaches the overvoltage limit operation level during deceleration, the motor may be decelerated more quickly than normal deceleration by increasing the voltage to be applied to the motor (over-excitation control) to increase the amount of energy consumed by the motor.
[F305: Overvoltage limit operation] = "3"
This value sets dynamic quick deceleration.
The motor may be decelerated more quickly than quick deceleration by increasing the voltage to be applied to the motor (over-excitation control) to increase the amount of energy consumed by the motor as soon as the motor starts decelerating.
[F319: Regenerative over-flux upper limit] is enabled when [F305: Overvoltage limit operation] is set to "2" or "3".
This parameter is used to adjust the maximum value of energy the motor consumes during deceleration. Increase this value if overvoltage tripping occurs during deceleration. [F626: Overvoltage limit operation level] also serves as the parameter to set the dynamic braking level.

Please reference latest AS3 Instruction Manual more details or latest information.

AS3 fault codes, descriptions, symptoms and suggested remedies can be found in the below links. Each fault code can also be linked to directly from the AS3 by accessing the QR code on a mobile device while the AS3 is currently experiencing the fault.