5.3 Description of Function Codes 5.3.1 F codes (Fundamental functions)
Restart mode after momentary power failure (Basic operation: With auto search setting)
Auto search is not performed normally if there is residual voltage of the motor.
Therefore, it is necessary to secure the time until residual voltage runs out.
Restart mode after momentary power failure secures the necessary time with function code H46 starting mode
(auto search delay time 2). Even if starting conditions are satisfied, the inverter does not start unless auto-search
delay time elapses after inverter goes into OFF state. The inverter starts after elapse of auto search delay time. (
Function codes H09, d67)
• When operating auto search, it is necessary to perform auto-tuning in advance.
• When the estimated speed exceeds the maximum frequency or the upper limit frequency, the inverter
disables auto search and starts running the motor with the maximum frequency or the upper limit
frequency, whichever is lower.
• During auto search, if an overcurrent or overvoltage trip occurs, the inverter will restart the auto search.
• Use 60 Hz or below for auto search
• Note that auto search may not fully provide the performance depending on load conditions, motor
parameters, wiring length, and other external factors.
• When output circuit filter OFL- -2, -4 is equipped on the output side of the inverter, auto search
must be disabled. Use OFL- - A type.
• Do not set d67 to 0 if using a permanent magnet synchronous motor.
Motor speed/output
frequency
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