Operation selection at power failure and instantaneous power failure
To force tuning to end, use the MRS or RES signal or press
signal or STR signal) OFF also ends tuning.)
During offline auto tuning, only the following I/O signals are valid: (initial value)
Input terminal <Valid signal> MRS, RES, STF, STR
Output terminal RUN, FM, A, B, C
Note that the progress status of offline auto tuning is output in eight steps from FM when speed and output frequency
Since the RUN signal turns ON when tuning is started, caution is required especially when a sequerence 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.
Do not perform ON/OFF switching of the second function selection signal (RT) during execution of offline auto
tuning. Auto tuning is not executed properly.
2) Monitor is displayed on the operation panel and parameter unit (FR-PU04, FR-PU07) during tuning as below.
Pr. 96 setting
(2) Tuning in progress
(3) Normal end
(4) Error end
(when inverter protective function
operation is activated)
Reference: Offline auto tuning time (when the initial value is set)
Offline Auto Tuning Setting
Tune motor constants (R1) only
(Pr. 96 = "21")
3) When offline auto tuning ends, press
OFF the start signal (STF signal or STR signal) once.
This operation resets the offline auto tuning and the PU's monitor display returns to the normal indication.
(Without this operation, next operation cannot be started.)
Do not change the Pr. 96 setting after completion of tuning (23).
If the Pr. 96 setting is changed, tuning data is invalid.
If the Pr. 96 setting is changed, tuning must be performed again.
Approx. 9s (Tuning time differs according to the inverter capacity
and motor type.)
of the operation panel during PU operation. For External operation, turn
of the operation panel. (Turning the start signal (STF
Operation Panel Indication