Delta ASD-A2-0121 Series User Manual page 638

Chapter 10 Troubleshooting
AL070：Encoder does not complete the command which is issued by servo drive
Causes
The servo drive has not
completely written
barcode into the encoder
or the encoder does not
complete the command
issued by the servo
drive.
：
AL072 Encoder overspeed
Causes
When encoder is
powered by the servo
drive: the speed is over
8,800 rpm or the
acceleration exceeds
1×10 5 rad/s 2 .
When the encoder is
powered by the battery:
the speed is over
10,000 rpm or the
acceleration is over
4×10 3 rad/s 2 .
AL073：Encoder memory error
Causes
An error occurs when the
encoder is reading data
from or writing data to
EEPROM.
Checking Method
Check if the encoder wiring is
correct or there is any loose
connection.
Checking Method
1. Check if the motor is well
grounded.
2. Check if the encoder cable is
separated from the power
supply or any high-current cable
to avoid interference.
3. Check if the encoder uses
shielded cable.
4. Check the motor speed. When
the application has a high
reduction ratio and the
connecting mechanism is
moved, it results in motor
overspeed.
Checking Method
1. Check if the motor is well
grounded.
2. Check if the encoder cable is
separated from the power
supply or any high-current cable
to avoid interference.
3. Check if the encoder uses
shielded cable.
4. Check the motor speed.
Corrective Actions
Correctly connect the encoder
wiring again.
Corrective Actions
1. Make sure the UVW connector
is grounded to the heat sink of
the servo drive.
2. Make sure the encoder signal
cable is separated from the
power supply or any high-
current cable.
3. Use shielded cable for the
encoder.
4. Make sure the motor speed is
within the rated range.
5. Create the absolute origin
coordinate again.
6. If the issue persists, please
send your servo drive back to
the distributor or contact Delta.
Corrective Actions
1. Make sure the UVW connector
is grounded to the heat sink of
the servo drive.
2. Make sure the encoder signal
cable is separated from the
power supply or any high-
current cable.
3. Use shielded cable for the
encoder.
4. Make sure the motor speed is
within the rated range.
5. If the issue persists, please
send your servo drive back to
the distributor or contact Delta.
ASDA-A2
10-23