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Troubleshooting

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ASDA-A3

14

AL024 Encoder initial magnetic field error

Trigger condition

and cause

Condition: the magnetic field of the encoder U, V, W signal is in error.

Cause: the initial magnetic field of the encoder is in error (magnetic field of the

encoder U, V, W signal is in 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

cables to avoid interference.

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

Checking method

correctly grounded.

and corrective action 4. If using a linear motor, check the wiring noise interference. For the noise filter

of the converter box, refer to PM.003. For the noise filter of the CN5 position

feedback signal connector, refer to P1.074.

How to clear the

alarm?

5. Check the Hall sensor wiring of the linear motor and monitor the Hall sensor

phase sequence by entering “0x1B42F” in the address field of the software

scope.

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

Cycle power on the servo drive.

AL025 Encoder internal error

Trigger condition

and cause

Condition: internal memory and counter of the encoder are in error.

Cause:

1. Encoder internal error (internal memory and counter are in error).

2. When power is applied, the motor rotates because of the inertia of the

mechanical parts or other causes.

1. If there is interference, check the following items:

(a) 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

(b) 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.

(c) Use shielded cable for the encoder cable. Pull out the wire mesh and

have it correctly grounded.

2. Make sure the motor shaft does not move when power is turned on.

How to clear the

alarm?

Cycle power on the servo drive.

14-20

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