Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 111

Selection and protection of a motor
 The following shows the monitor display/indicator on the operation panel or the parameter unit (FR-PU07) during tuning.
Pr.96 Setting
(1) Setting
(2) During tuning
(3) Normal completion
 When offline auto tuning ends during PU operation, press
OFF the start signal (STF or STR). 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.)
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. However, performing all parameter clear resets the tuning data.
 Changing Pr.71 after tuning completion will change the motor constant. For example, if the Pr.71 setting is changed to
"9090" after tuned with Pr.71 = "8090", the tuning data become invalid. To use the tuned data, set "8090" again in Pr.71.
 If offline auto tuning has ended in error (see the table below), the motor constants have not been set.
Perform a drive unit reset and restart tuning.
Error Code
8 Forced end
9 Drive unit protective function operation
The converter output voltage fell to 75% of the
92
rated voltage.
Calculation error
93
The motor is not connected.
 When tuning is ended forcibly by pressing
tuning does not end properly. (The motor constants have not been set.)
Perform a drive unit reset and restart tuning.
REMARKS
 An instantaneous power failure occurring during tuning will result in a tuning error.
After power is restored, the drive unit starts the normal operation. Therefore, when the STF (or STR) signal is ON, the motor
runs in the forward (or reverse) rotation.
 Any alarm occurring during tuning is handled as in the normal operation. However, if the retry function is set, retry is not
performed even when a protective function that performs a retry is activated.
 "0Hz" is displayed on the set frequency monitor during the offline auto tuning.
Note that the motor may start running suddenly.
108
Operation Panel Display/Indicator
1
Blinking
Cause of Error
or turning OFF the start signal (STF or STR) during tuning, offline auto
Parameter Unit (FR-PU07) Display
TUNE
TUNE
STF
TUNE
COMPLETION
STF
on the operation panel. During External operation, turn
Countermeasures
Set Pr.96 = "1" and try again.
 Make the setting again.
 Adjust the Pr.672 setting.
 Check for the power supply voltage fluctuation.
 Check the Pr.83 Rated motor voltage setting.
 Check the motor wiring or parameter settings, and
perform the tuning again.
 Adjust the Pr.672 setting.
CAUTION
1
READ:List
1
STOP PU
2
FWD PU
3
STOP PU