186
Selection and protection of a motor
3)When offline auto tuning ends, press of the operation panel during PU operation. For external operation, turn
off the start signal (STF signal or STR signal).
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.)
4)If offline auto tuning ended in error (see the table below), motor constants are not set.
Perform an inverter reset and restart tuning.
5)When tuning is ended forcibly by pressing or turning off the start signal (STF or STR) during tuning, offline
auto tuning does not end normally. (The motor constants have not been set.)
Perform an inverter reset and restart tuning.
REMARKS
· Do not change the Pr. 96 setting after completion of tuning (3 or 103).
If the Pr. 96 setting is changed, tuning data is made invalid.
If the Pr. 96 setting is changed, tuning must be performed again.
Error Display Error Cause Remedy
8 Forced end
Set "1" or "101" in Pr. 96 and perform tuning
again.
9 Inverter protective function operation Make setting again.
91
Current limit (stall prevention) function was
activated.
Increase acceleration/deceleration time.
Set "1" in Pr. 156 .
92
Converter output voltage reached 75% of
rated value.
Check for fluctuation of power supply voltage.
93
Calculation error
A motor is not connected.
Check the motor wiring and make setting
again.
CAUTION
· 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 an error retry has been set, retry is ignored.
· The set frequency monitor displayed during the offline auto tuning is 0Hz.
CAUTION
Note that the motor may start running suddenly.
When the offline auto tuning is used in vertical lift application, e.g. a lifter, it may drop due to insufficient torque.
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