17
The restart time is usually set to about 1 second and some
motors have longer residual time.
Set restart time t so that the restart is performed after
Vo x 100=30% or below.
Vm
4-2-11 Restart after error has occurred
When protection oU (DC overvoltage protection) or Fu (fuse of the main circuit is blown) is performed, reset is
automatically performed to restart the inverter.
1) No. 42 Retrial.cnt (retry count)........................................... Set the number of restart retries.
4-2-12 Reference control functions
1) No. 43 F.Control (frequency control mode selection)
[1] Standard: ........................................................ Open control
This is selected when the V/F constant, square law
reduction, or bend characteristics are used for operation.
[2] Slip Compen: .................................................. Slip compensation control
This is selected to compensate the slip amount of the
motor; corrects the output frequency so that the number of
motor rotations is not reduced when the load increases.
[3] Freq.Droop: .................................................... Frequency droop control
This is selected to droop the frequency when the load
increases.
[4] ASR Control: .................................................. ASR control (option)
This is selected to use feedback from the pulse generator
(PG) mounted to the motor so that the specified number of
motor rotations is kept even when the load changes. ASR
control requires the optional board.
2) No. 44 Droop (frequency droop quantity)
The frequency droop quantity is obtained using the
following expression:
Droop quantity= Drooped frequency x 100%
Maximum frequency
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