(A) Application parameters
Before performing tuning, check the monitor display of the operation panel or the parameter unit
if the inverter is in the state ready for tuning. Turning ON the start command while tuning is una-
vailable starts the motor.
● In the PU operation mode, press FWD/REV key on the operation panel.
For External operation, turn ON the start command (STF signal or STR signal). Tuning will start. (At
this time, excitation noise occurs.)
It takes about 10 seconds for tuning to complete. (The time depends on the inverter capacity and
Satisfy the required inverter start conditions to start offline auto tuning. For example, stop the
input of MRS signal.
To force tuning to end, use the MRS or RES signal or press STOP/RESET key on 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 terminals <valid signals> STP (STOP), OH, MRS, RT, RES, STF, STR, S1 and S2
● Output terminals: RUN, OL, IPF, FM/CA, AM, A1B1C1 and SO
When the rotation speed and the output frequency are selected for terminals FM/CA and AM, the
progress status of offline auto tuning is output in fifteen steps from FM/CA and AM.
During execution of offline auto tuning, do not switch the second function selection signal (RT)
ON or OFF. Auto tuning is not executed properly.
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 circuit
power (R/L1, S/L2, T/L3) of the inverter.
While Pr. 79 "Operation mode selection" = "7", turn the PU operation external interlock (X12) signal
ON to tune in the PU operation mode.
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