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Troubleshooting

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ASDA-A3

AL075 Encoder absolute number of revolutions is in error

How to clear the

alarm?

Cycle power on the servo drive.

14

AL077 Encoder internal error

Trigger condition

and cause

Encoder internal error (internal computing error).

1. Check if the motor is properly grounded. Make sure the ground end (green) of

the power cable is grounded to the servo drive heat sink.

2. Check if the connection for the encoder signal cable is normal. Make sure the

encoder signal cable is separated from the power supply or any high-current

Checking method

and corrective action

cables to avoid interference.

3. Use shielded cable for the encoder cable. Pull out the wire mesh and have it

correctly grounded.

4. Check the motor speed and make sure it is within the rated range.

If the issue persists, send your servo motor back to the distributor or contact Delta.

How to clear the

alarm?

Cycle power on the servo drive.

AL079 Encoder parameter setting incomplete

Trigger condition

and cause

The servo drive is not cycled after the encoder parameter is written to the encoder,

so the parameter value is not updated.

Checking method Check if the encoder parameter is written. If so, cycle power to activate the

and corrective action parameter.

How to clear the

alarm?

Cycle power on the servo drive.

AL07A Encoder Z phase position is lost

Trigger condition

and cause

Encoder Z phase position is in error.

Checking method

and corrective action

Send your servo motor back to the distributor or contact Delta.

How to clear the

alarm?

N/A

AL07B Encoder memory is busy

Trigger condition

and cause

The encoder memory is busy.

1. Check if the motor is properly grounded. Make sure the ground end (green) of

the power cable is grounded to the servo drive heat sink.

Checking method

and corrective action 2. Check if the connection for the encoder signal cable is normal. Make sure the

encoder signal cable is separated from the power supply or any high-current

cables to avoid interference.

14-44

Send Quote Requests to info@automatedpt.com

Call +1(800)985-6929 To Order or Order Online At Deltaacdrives.com