internal power shuts down, the speed search operation accelerates the motor
back to its frequency reference before the low voltage trip.
If the current increases above the value set at CON-72, the voltage stops
increasing and the frequency decreases (t1 zone). If the current decreases
below the value set at CON-72, the voltage increases again and the frequency
stops decelerating (t2 zone). When the normal frequency and voltage are
resumed, speed search accelerates the motor back to its operating frequency
prior to the fault.
Starting with power-on: Set bit 3 to 1 (enabled) and ADV-10 (Power-on Run)
to 1 (Yes). If inverter input power is applied and the run command is active
(on), speed search accelerates the motor up to the frequency reference.
During Flying Start-1 (CON-70 set to 0), the amount of current is controlled.
The percentage is based on the motor’s rated current. If CON-70 (SS mode) is
set to 1 (Flying Start-2), this parameter is not visible.
CON-73 SS P-Gain
CON-74 SS I-Gain
The P/I gain of the speed search controller can be adjusted. If CON-70 (SS
Mode) is set to 1 (Flying Start-2), different factory defaults are used based on
motor capacity defined in MOT-01 (Motor Capacity).
CON-75 (SS Block Time) prevents overvoltage faults due to counter
electromotive force (emf).
If operated within the rated output, the inverter is designed to withstand instantaneous power
interruptions within 8 ms and maintain normal operation. The DC voltage inside the inverter
may vary depending on the output load. If the power interruption time is longer than 8 ms, a
low voltage trip may occur.
Select the normal acceleration speed search for proper operation during free-run. If the speed
search function is not set, an overcurrent trip or overload trip may occur.
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