Delta ASDA-B3 Series User Manual page 726

ASDA-B3
AL07B Encoder memory is busy
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
AL07C Command to clear the absolute position is issued when the motor speed is over
200 rpm
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
AL07D Motor stops operating when servo drive power is cycled before AL07C is cleared
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
The encoder memory is busy.
Check if the motor is properly grounded. Make sure the power cable (green
1.
end) is grounded to the servo drive heat sink.
Check if the connection for the encoder signal cable is normal. Make sure the
2.
encoder signal cable is separated from the power supply or any high-current
cables to avoid interference.
Use a shielded cable for the encoder, pull out the shielded mesh, and ground
3.
it.
Check the motor speed and make sure it is within the rated range.
4.
If the issue persists, send your servo motor back to the distributor or contact Delta.
Cycle power on the servo drive.
The command to clear the absolute position is issued when the motor speed is
over 200 rpm.
Check if a command to clear the absolute position is issued while the motor
1.
speed is over 200 rpm. If so, follow the procedure for clearing the absolute
position to clear this alarm.
Do not issue a command to clear the absolute position when the motor speed
2.
is over 200 rpm.
Cycle power on the servo drive.
AL07C occurs and is not cleared before power is cycled on the servo drive,
causing the motor to stop operating.
Use DI.ARST to clear the alarm. Once this alarm is cleared, AL07C occurs.
Follow the checking method and corrective action to clear AL07C.
Cycle power on the servo drive.
Troubleshooting
13
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