Delta ASDA-A3 Series User Manual page 521

Troubleshooting
How to clear the
alarm?
11
AL024 Encoder initial magnetic field error
Trigger condition
and causes
Checking methods
and corrective
actions
How to clear the
alarm?
AL025 Encoder internal error
Trigger condition
and causes
Checking
methods and
corrective actions
How to clear the
alarm?
AL026 Encoder unreliable internal data
Trigger condition
and causes
11-16
DI.ARST
Condition: the magnetic field of the encoder U, V, W signal is in error.
Cause: the initial magnetic field of the encoder is in error (Signal U, V, W of
the encoder magnetic field is in error.)
1. Make sure the servo motor is properly grounded and connect the UVW
connector (color green) to the heat sink of the servo drive.
2. Make sure the encoder cable is separated from the power supply or any
high-current cables to avoid interference.
3. Use shielded cable for the encoder.
If the issue persists, please send your servo drive back to the distributor or
contact Delta.
Re-power on the servo drive.
Condition: internal memory and counter of the encoder are in error.
Causes:
1. Internal encoder error (internal memory and counter are in error).
2. When applying power, the motor rotates because of inertia of the
machinery or other causes.
1. (A) Make sure the servo motor is properly grounded and connect the
UVW connector (color green) to the A3 servo drive heat sink.
(B) Make sure the encoder cable is separated from the power supply or
any high-current cables to avoid interference.
(C) Use shielded cable for the encoder.
2. Make sure the motor shaft does not move when power is turned on.
Cycle the power to the servo drive.
Condition: internal data error occurs three consecutive times.
Causes:
1. External interference.
2. Malfunction of encoder hardware.
ASDA-A3
Revision December, 2017