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Alarm Display: A.820. Alarm Name: Encoder Checksum Error on Sony SI-F209 Electronic Part Mounter

Alarm Display: A.820

Alarm Name: Encoder Checksum Error

1. Situation at Alarm Occurrence: Occurred when the control power supply was turned ON or during operation

Cause: A fault occurred in the encoder and was detected by encoder self-diagnosis.
Corrective Actions: Set up the encoder. If this alarm occurs frequently, replace the servomotor.

Cause: A SERVOPACK fault occurred.
Corrective Actions: Replace the SERVOPACK.

2. Situation at Alarm Occurrence: Occurred when Sensor ON (SENS_ON) command was sent.

Cause: A fault occurred in the encoder and was detected by encoder self-diagnosis.
Corrective Actions: Set up the encoder. If this alarm occurs frequently, replace the servomotor.

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