6428		4

	J8 encoder data not received
	A communication error has occurred on the 8th-axis encoder.
	1. Check that the encoder backup battery connector is firmly plugged. 2. Check that the robot and the controller are away from noise source such as a welding machine. 3. Check if the cable between the robot and the controller is firmly plugged. 4. If this error occurs after you change the motor, check if the encoder ID number of the motor is correctly set. Using the error log, check that encoder-data-no-reception error occurs on the other axes. If this error occurs on six axes starting from the specific axis, check if the first axis encoder connector for normal connection. If this error occurs on all axes, follow the above step 3.