Mitsubishi Electric FR-A800 Series Instruction Manual page 548

• If offline auto tuning has ended in error (see the following table), motor constants are not set.
Perform an inverter reset and restart tuning.
Error display
8
9
92
93
94
• When tuning is ended forcibly by pressing
tuning does not end properly. (The motor constants have not been set.)
Perform an inverter reset and perform tuning again.
NOTE
• An instantaneous power failure occurring during tuning will result in a tuning error.
After power is restored, the inverter starts normal operation. Therefore, when the STF (STR) signal is ON, the motor starts
forward (reverse) rotation.
• Any fault occurring during tuning is handled as in the normal operation. However, if the retry function is set, no retry is
performed even when a protective function that performs a retry is activated.
• The set frequency monitor displayed during the offline auto tuning is 0 Hz.
CAUTION
• Note that the motor may start running suddenly.
 Parameters updated by tuning results after tuning
Pr.
90 (458)
92 (460)
93 (461)
711 (739)
712 (740)
859 (860)
96 (463)
*1 *2
373 871
*1 *2
1105 887
○: Tuned, ―: Not tuned
*1 The setting is available when the FR-A8AL/FR-A8APR/FR-A8APS/FR-A8APA is installed.
*2 The setting is available when the FR-A8TP is installed.
NOTE
• If the offline auto tuning is started before the encoder position tuning is finished (Pr.1105 (Pr.887) = "65535") for a PM motor,
the protective function (E.MP) is activated.
 Tuning adjustment (Pr.1002)
• The overcurrent protective function may be activated during Lq tuning for an easily magnetically saturated motor (motor
with a large Lq decay ratio). In such case, adjust the target flowing current used for tuning with Pr.1002 Lq tuning target
current adjustment coefficient.
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Error cause
Forced end
Inverter protective function operation
The converter output voltage fell to 75% of the rated voltage.
Calculation error.
The motor is not connected.
Rotation tuning frequency setting error.
(The frequency command for the tuning was given to exceed
the maximum frequency setting, or to be in the frequency
jump range.)
Name
Motor constant (R1)
Motor constant (L1)/d-axis inductance
(Ld)
Motor constant (L2)/q-axis inductance
(Lq)
Motor Ld decay ratio
Motor Lq decay ratio
Torque current/Rated PM motor current ○
Auto tuning setting/status
Encoder position tuning setting/status
Encoder magnetic pole position offset
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Set Pr.96 (Pr.463)="1 or 101" and try again.
Make the setting again.
Check for the power supply voltage fluctuation.
Check the Pr.83 Rated motor voltage setting.
Check the motor wiring and make the setting again.
Check the Pr.1 Maximum frequency and Pr.31 to Pr.36
Frequency jump settings.
or turning OFF the start signal (STF or STR) during tuning, offline auto
Tuning according to Pr.96 (Pr.463) setting
101 1
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Countermeasures
Description
11
○ Resistance per phase
— d-axis inductance
— q-axis inductance
— d-axis inductance decay ratio
— q-axis inductance decay ratio
—
○
Encoder position tuning status
—
Turning data of encoder
—
position tuning
5. PARAMETERS
5.13 (C) Motor constant parameters
1
2
3
4
5
6
7
8
9
10
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