Delta ASD-A2-0121 Series User Manual page 633

ASDA-A2
AL026：Unreliable internal data of the encoder
Causes
The encoder is in error.
(Errors occur in the
internal data for three
consecutive times.)
AL027：The internal of the motor is in error
Causes
The internal reset of the
encoder is in error.
AL028：Encoder voltage error or the internal of the encoder is in error
Causes
Battery voltage is too
high.
The internal encoder is in
error.
AL029：Gray code error
Causes
Absolute position is in
error.
10-18
Checking Method
1. Check if the servo is properly
grounded.
2. Check if the encoder cable
separates from the power supply
or the high-current circuit to avoid
the interference.
3. Check if the shielding cables are
used in the wiring of the encoder.
Checking Method
1. Check if the encoder cable is
firmly connected.
2. Check if the power supply for the
encoder is stable.
3. Check if the operation
temperature is over 95°C
(203°F).
Checking Method
1. Check if the charging circuit
exists in the servo drive.
2. Check if the battery is correctly
installed. (voltage > 3.8V)
1. Check if it is the absolute type
encoder.
2. Check if the servo is properly
grounded.
3. Check if the encoder cable
separates from the power supply
or the high-current circuit to avoid
the interference.
4. Check if the shielding cables are
used in the wiring of the encoder.
Checking Method
Re-power on to operate the motor
and check if the alarm will occur
again.
Chapter 10 Troubleshooting
Corrective Actions
1. Please connect the UVW
connector (color green) to the
heat sink of the servo drive.
2. Please check if the encoder
cable separates from the power
supply or the high-current circuit.
3. Please use shielding mesh.
4. If the issue persists, please send
the drive back to the distributors
or contact Delta.
Corrective Actions
1. Check if the encoder signal cable
works normally.
2. Use shielded cable for the
encoder signal cable.
3. If the situation is not improving,
please send the drive back to the
distributors or contact Delta.
Corrective Actions
According to the procedure of Over
voltage to check. When corrective
actions are done, AL028 will be
cleared automatically.
1. If the situation is not improving,
please send the drive back to the
distributors or contact Delta.
2. Please connect the UVW
connector (color green) to the
heat sink of the servo drive.
3. Please check if the encoder
cable separates from the power
supply or the high-current circuit.
4. Please use shielding mesh. If the
situation is not improving, please
send the drive back to the
distributors or contact Delta.
Corrective Actions
If the alarm occurs again, please
change the encoder.