Delta ASDA-A3 Series User Manual page 535

Troubleshooting
11
Checking methods
and corrective
actions
How to clear the
alarm?
AL08C Auto-tuning function - Pause time is too short
Trigger condition
and causes
Checking methods
and corrective
actions
How to clear the
alarm?
AL095 Regenerative resistor disconnected
Trigger condition
and causes
Checking methods
and corrective
actions
How to clear the
alarm?
11-30
4. Inertia variation is too drastic.
1. The acceleration/deceleration time for the motor to rotate from 0 rpm to
3000 rpm must be within 1.5 sec.
2. The slowest speed must be no less than 200 rpm; above 500 rpm is
suggested.
3. The load inertia must be no more than 50 times the motor inertia.
4. Avoid applications that require drastic variation in the inertia.
DI.ARST
Condition: the pause time is too short when the controller is the command
source in the auto-tuning procedure. The auto-tuning algorithm requires a
certain amount of time to perform the calculation. The tuning result is
affected if the pause time is too short.
Cause: pause time in the cycle is too short.
1. For a reciprocating motion between two points, pausing is required on
the return, which has to be longer than 1 sec.
2. For rotation in a single direction, pause time is required when the motor
rotates a certain number of cycles (> 2 cycles).
DI.ARST
The value of P1.053 (capacity of regenerative resistor) is not 0 and the
external regenerative resistor or the brake is not connected. Only servo
drives of 5.5 kW or above that have built-in regenerative resistors show this
alarm.
1. If the regenerative brake is required, please connect the regenerative
resistor. Once you connect the resistor, make sure that the value of
P1.053 is correct.
2. If not using the regenerative brake, set P1.053 (capacity of regenerative
resistor) to 0.
If the issue persists, please send the servo drive back to the distributor or
contact Delta.
DI.ARST
ASDA-A3
Revision December, 2017