Delta ASDA-A3 Series User Manual page 780

ASDA-A3
AL08C Auto-tuning function - Inertia estimation error
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
AL095 Regenerative resistor disconnected
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
AL099 DSP firmware update
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
Condition: inertia estimation error occurs when the servo drive starts the auto-tuning
procedure.
Cause:
Acceleration / deceleration time is too long.
1.
Rotation speed is too slow.
2.
Inertia of the machine is too large.
3.
Inertia variation is too drastic.
4.
The time for the motor to accelerate from 0 rpm to 3,000 rpm or decelerate from
1.
3,000 rpm to 0 rpm must be within 1.5 seconds.
The slowest speed must be no less than 200 rpm; above 500 rpm is suggested.
2.
The load inertia must be no more than 50 times the motor inertia.
3.
Avoid applications that require drastic variation in the inertia.
4.
DI.ARST
The value of P1.053 (regenerative resistor capacity) is not 0 and the external
regenerative resistor or the brake is not connected. Only servo drives of 5.5 kW or
above show this alarm because there is no built-in regenerative resistor.
If the regenerative brake is required, connect the regenerative resistor.
1.
Once you connect the resistor, make sure that the value of P1.053 is correct.
If not using the regenerative brake, set P1.053 (regenerative resistor capacity)
2.
to 0.
If the issue persists, send your servo drive back to the distributor or contact Delta.
DI.ARST
EEPROM is not reset after DSP firmware is updated.
Check if the firmware is updated. Set P2.008 to 30 first and then set it to 28.
Next, cycle power on the servo drive.
Set P2.008 to 30 and then 28. Cycle power on the servo drive.
Troubleshooting
13
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