Execution of tuning
Before performing tuning, check the monitor display of the operation panel or
parameter unit (FR-PU04/FR-PU07) if the inverter is in the status for tuning (refer to
Tab. 6-13). When the start command is turned on under V/f control, the motor starts.
When performing tuning or PU operation, press the RUN key of the operation panel or the FWD
or REV key of the parameter unit (FR-PU04/FR-PU07).
For external operation, turn on the run command (STF signal or STR signal). Tuning starts.
To force tuning to end, use the MRS or RES signal or press the STOP/RESET key of the
operation panel. (Turning the start signal (STF signal or STR signal) off also ends tuning.)
During offline auto tuning, only the following I/O signals are valid: (initial value)
– Input terminal:
MRS, RES, STF, STR
– Output terminal:
RUN, AM, A, B, C
Note that the progress status of offline auto tuning is output in eight steps from AM when
speed and output frequency are selected.
Since the RUN signal turns on when tuning is started, caution is required especially when a
sequence which releases a mechanical brake by the RUN signal has been designed.
When executing offline auto tuning, input the run command after switching on the main cir-
cuit power (R/L1, S/L2, T/L3) of the inverter.
Do not perform ON/OFF switching of the second function selection signal (RT) during execu-
tion of offline autotuning. Auto tuning is not excecuted properly.
Do not connect a surge voltage suppression filter (FFR-DT) between the inverter and motor.
Selection and protection of a motor
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