Mitsubishi Electric FR-E720-600 Instruction Manual page 119

3) When offline auto tuning ends, press
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.)
REMARKS
Do not change the Pr. 96 setting after completion of tuning (3 or 13).
If the Pr. 96 setting is changed, tuning data is made invalid.
If the Pr. 96 setting is changed, tuning must be performed again.
4) If offline auto tuning ended in error (see the table below), motor constants are not set.
Perform an inverter reset and restart tuning.
Error
Display
8 Forced end
9 Inverter protective function operation
91 Current limit (stall prevention) function was activated.
92 Converter output voltage reached 75% of rated value.
Calculation error
93
A motor is not connected.
5) When tuning is ended forcibly by pressing
tuning does not end normally. (The motor constants have not been set.)
Perform an inverter reset and restart tuning.
NOTE
The motor constants measured once in the offline auto tuning are stored as parameters and their data are held until
the offline auto tuning is performed again.
An instantaneous power failure occurring during tuning will result in a tuning error.
After power is restored, the inverter goes into the normal operation mode. Therefore, when STF (STR) signal is on,
the motor runs in the forward (reverse) rotation.
Any alarm occurring during tuning is handled as in the ordinary mode. Note that if a fault retry has been set, retry is
ignored.
As the motor may run slightly during offline auto tuning, fix the motor securely with a mechanical brake or make sure
that there will be no problem in safety if the motor runs. Note that if the motor runs slightly, tuning performance is
unaffected.
of the operation panel during PU operation. For external operation, turn off
Error Cause
or turning off the start signal (STF or STR) during tuning, offline auto
CAUTION
Selection and protection of a motor
Remedy
Set "1" or "11" in Pr. 96 and perform tuning again.
Make setting again.
Set "1" in Pr. 156.
Check for fluctuation of power supply voltage.
Check the motor wiring and make setting again.
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