Delta ASD-A2-0121 Series User Manual page 640

Chapter 10 Troubleshooting
AL079：Encoder parameter error
Causes
The encoder is not cycled
after the parameter is
written, so the parameter
value is not updated.
AL07A：Loss of encoder Z pulse
Causes
Loss of encoder Z pulse
position
AL07B：Encoder memory busy
Causes
Encoder memory is busy.
AL07C：Command to clear the absolute position is issued when the motor speed is over
200 rpm
Causes
The command to clear
the absolute position is
issued when the motor
speed is over 200 rpm.
Checking Method
Check if the parameter is written to
the encoder.
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.
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.
Checking Method
Do not issue a command to clear
the absolute position when the
motor speed is over 200 rpm.
Corrective Actions
Cycle power on the servo drive.
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. 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.
Corrective Actions
Follow the procedure for clearing
the absolute position to clear this
alarm.
ASDA-A2
10-25