6602		5

	Host-servo com. IC error (2:host-2)
	Controller internal error (A receiving error was detected just before host data was sent or when periodical check was done.)
	1. Check that the FG (frame ground) terminals of the robot and the controller are grounded. 2. Check that the robot and the controller are away from noise source such as a welding machine. 3. Check that the cable between the robot and the controller is firmly plugged.