E6582233
F-33
6
6.13.5 Avoiding overvoltage tripping
: Overvoltage limit operation
f626 : Over-voltage stall protection level
Function
These parameters are used to keep the output frequency constant or increase it to prevent
overvoltage tripping in case the voltage in the DC section rises during deceleration or varying speed
operation. The deceleration time during overvoltage limit operation may increase above the
designated time.
Overvoltage limit operation level
DC Voltage
Output
Frequency
Over-voltage stall protection level
[Parameter setting]
Title Function Ad
ustment ran
e Default settin
Overvoltage limit operation
(Slowdown stop mode
selection)
0: Enabled
1: Disabled
2: Enabled (Quick deceleration control)
3: Enabled (Dynamic quick deceleration
control
2
Over-voltage stall protection
level
100-150 (%) *1 136
*1: 100% corresponds to an input voltage of 400V for 400V models.
★ If is set to 2 (quick deceleration control), the inverter will increase the voltage to the motor (over-
excitation control) to increase the amount of energy consumed by the motor when the voltage reaches the
overvoltage protection level, and therefore the motor can be decelerated more quickly than normal
deceleration.
★ If is set to 3 (dynamic quick deceleration control), the inverter will increase the voltage to the
motor (over-excitation control) to increase the amount of energy consumed by the motor as soon as the
motor begins to slow down, and therefore the motor can be decelerated still more quickly than quick
deceleration.
★ During overvoltage limit operation, the overvoltage pre-alarm ( blinks) is displayed.
★ Parameter serves also as a parameter for setting the regenerative braking level.
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