Delta ASDA-A3 Series User Manual page 763

Troubleshooting
AL028 Encoder voltage error or encoder internal error
13
Trigger condition
and cause
Checking method
and corrective
action
How to clear the
alarm?
AL029 Gray code error
Trigger condition
and cause
Checking method
and corrective
action
How to clear the
alarm?
13-18
Condition: servo drive charging circuit is not removed so the battery voltage is higher
than the specification (> 3.8V) or the encoder signal is in error.
Cause:
Voltage level of the battery is too high.
1.
Encoder internal error.
2.
Follow the testing procedure for overvoltage / overcurrent and troubleshoot.
1.
This automatically clears AL028.
Check the servo drive charging circuit. Avoid incorrect wiring. If Pin 1
(a)
(5V) of CN2 is connected to BAT+, it means the power (5V) of the servo
drive is being charged to the battery.
Check if the battery is correctly installed (voltage > 3.8V).
(b)
(a) Make sure the encoder is the absolute type. Check and remove the
2.
cause for the alarm. If the issue persists, send your servo drive back to
the distributor or contact Delta.
Make sure the servo motor is properly grounded and connect the
(b)
ground of the UVW connector (green) to the servo drive heat sink.
Make sure the encoder signal cable is separated from the power supply
(c)
or any high-current cables to avoid interference.
Use shielded cable for the encoder. If the issue persists, send your
(d)
servo drive back to the distributor or contact Delta.
Cycle power on the servo drive.
Absolute position error
Cycle the power to the servo drive to operate the motor. Then, check if the alarm
occurs again.
If the issue persists, replace the encoder.
Cycle power on the servo drive.
ASDA-A3