Delta ASDA-A3 Series User Manual page 522

ASDA-A3
Checking methods
and corrective
actions
How to clear the
alarm?
AL027 Internal motor error
Trigger condition
and causes
Checking methods
and corrective
actions
How to clear the
alarm?
AL028 Encoder voltage error or encoder internal error
Trigger condition
and causes
Checking methods
and corrective
actions
Revision December, 2017
To correct the interference, check the following descriptions:
1. Make sure the servo motor is properly grounded and connect the UVW
connector (color green) to the A3 servo drive heat sink.
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.
4. Set P0.002 to -80 by using the panel to monitor the communication error
status. If the value is greater than 0 and the value increases
continuously, please check steps 1—3 again. If the value is 0, send the
motor back to the distributor or contact Delta.
Re-power on the servo drive.
Condition: encoder reset error.
Cause: encoder reset.
1. Check if the encoder cable is firmly connected.
2. Check if the power supply for the encoder is stable and make sure to use
shielded cable.
3. Check if the operation temperature is over 95℃. Identify the cause for
the high temperature and do not restart operation before the
temperature falls back into the allowable range.
If issue persists, please send your servo drive back to the distributor or
contact Delta.
Re-power on the servo drive.
Condition: servo drive charging circuit is not removed so the battery voltage
is higher than the specification (>3.8 V) or the encoder signal is in error.
Causes:
1. Voltage level of the battery is too high.
2. Internal encoder error.
1. Follow the testing procedure for over-voltage/over-current and
troubleshoot. This automatically clears AL028.
(A) Check the servo drive charging circuit. Avoid incorrect wiring; if Pin
1 (5V) of CN2 is connected to BAT+, it means the power (5V) of the
servo drive is being charged to the battery.
(B) Check if the battery is correctly installed (voltage > 3.8V).
2. Make sure the encoder is the absolute type. Check and remove the
Troubleshooting
11
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