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ASDA-A3
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Troubleshooting
AL08B Auto-tuning function - dwell time is too short
Trigger condition
and cause
Condition: the dwell time is too short when the command source is the controller 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 dwell time is too
short.
Cause: dwell time in the cycle is too short.
1. For a reciprocating motion between two points, a dwell is required on the
return, which has to be longer than 1 second. Furthermore, the duration of a
Checking method
and corrective action
single command cannot exceed 20 seconds.
2. For rotation in a single direction, dwell time is required when the motor rotates
a certain number of cycles (> 2 cycles).
How to clear the
alarm?
DI.ARST
14
AL08C Auto-tuning function - inertia estimation error
Condition: inertia estimation error occurs when the servo drive starts the
auto-tuning procedure.
Trigger condition
and cause
Cause:
1. Rotation speed is too slow.
2. Acceleration or deceleration time is too long.
3. Load inertia of the machine is too large.
4. Inertia variation of the machine is too drastic.
1. The lowest speed should be no less than 200 rpm. It is suggtested that you
set the speed to 500 rpm or higher.
Checking method
and corrective
action
2. The time for the motor to accelerate from 0 rpm to 3,000 rpm or decelerate
from 3,000 rpm to 0 rpm must be within 1.5 seconds.
3. The load inertia should be less than 50 times the motor inertia.
How to clear the
alarm?
4. Avoid applications that require drastic variation in the inertia.
DI.ARST
AL095 Regenerative resistor is disconnected
Trigger condition The value of P1.053 (Regenerative resistor capacity) is not 0 and the external
and cause
regenerative resistor or the brake wiring is in error.
1. If the servo braking requires the regenerative resistor, correctly connect the
Checking method
and corrective action
external regenerative resistor. Once you connect the resistor, make sure that
the value of P1.053 is correct.
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