
A.TROUBLESHOOTING APPENDIX B-63354EN/04
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A.1 CHECKING HUB CONNECTION
1) Make sure that the STP cable between the hub and the Ethernet
board is connected.
2) Make sure that cables are properly wired.
• Though communication is carried out when the cable pair
(see "2.3.1 Cable connection") at the send and receive sides
is not properly mounted, communications errors may occur
more frequently.
3) Make sure that the hub for 10BASE-T is being used.
4) Make sure that the hub is ON.
5) Make sure that the TPPIL LED on the Ethernet board is lit at all
times.
• The TPPIL LED will not light if the Ethernet board is not
connected to the hub or if the hub is not ON.
6) Make sure that the LED (LINK indicator LED) on the connected
hub is lit at all times.
• Some hubs do not have a LINK indicator LED.
• The LINK indicator LED will not light if the hub is not
connected to the Ethernet board or the Ethernet board is not
ON.
• For details on how to connect, see "V. Connecting the FANUC
Ethernet Board."