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ASDA-A3

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Troubleshooting

AL011 CN2 communication failed

Condition: connection to the encoder is in error.

Cause:

1. CN2 wiring is incorrect.

Trigger condition

and cause

2. CN2 connector is loose.

3. CN2 wiring is poor.

4. Connection to the encoder is cut off due to interference.

5. Encoder is damaged.

6. A motor not supported by the A3 series servo drives is used.

1. Check if the wiring follows the instructions in the user manual. If not, connect

the wire correctly.

2. Check the connection between the CN2 port of the servo drive and the CN2

connector. If the connection is loose, reconnect the CN2 connector to the CN2

port of the servo drive.

3. Check for the encoder cable and connector which connect the motor and

CN2 port of the servo drive to see if there is any poor wiring or damaged

wires.

If so, replace the connector and cable.

4. Check the communication error rate by setting P0.002 to -80. If this value

Checking method

and corrective action

increases continuously, it means 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.

(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.

How to clear the

alarm?

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

have it correctly grounded.

5. If you took all corrective actions but the issue persists, replace the motor.

6. Contact the distributor for the supported motor models or encoder

specifications.

Cycle power on the servo drive.

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