Delta ASDA-A3 Series User Manual page 759

Troubleshooting
AL017 Abnormal EEPROM
How to clear the
alarm?
13
AL018 Abnormal encoder signal output
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
13-14
If this alarm occurs when the drive is started, reset the parameters and then cycle
the power. If the alarm occurs during operation, reset the alarm.
Condition: output pulse frequency of the encoder is higher than the maximum output
frequency of the hardware.
Cause:
Pulse resolution of the encoder is set too high.
1.
There is interference or cable damage causing communication error.
2.
Encoder error.
3.
The setting of P1.076 and P1.046 should follow these requirements:
1.
P1.076 > motor speed and
Check the communication error status by setting P0.002 to -80. If the value
2.
continuously increases, it means there is interference. Check the following:
 Make sure the servo motor is properly grounded and connect the ground
of the UVW connector (green) to the servo drive heat sink.
 Check if the connection for the encoder signal cable is normal. Make
sure the encoder signal cable is separated from the power supply or any
high-current cables to avoid interference.
Use shielded cable for the encoder.

 Check the error log (P4.000 - P4.005) and see if an alarm has occurred
(AL011, AL024, AL025, and AL026). Use the checking methods and
corrective actions to clear the alarm if any of them occurs.
If you do not need to use the OA/OB pulse, set P2.065 Bit[13] to 1 to disable
3.
the encoder output error (AL018) detection function.
DI.ARST
1.
Contact the distributor.
2.
ASDA-A3