
A.TROUBLESHOOTING APPENDIX B-64014EN/03
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• Checking IP addresses for duplication
IP addresses can be checked for duplication by the procedure
described below.
(1) Disconnect the Ethernet cable from the CNC to isolate it
from the network.
(2) Execute a ping command on another personal computer as
described in "• Checking the communication path."
Since the CNC is disconnected from the network, no
response should be returned. If a response is returned, the IP
address is in use on another unit. Therefore, the IP address
cannot be used on the CNC from which the cable was
disconnected.
CAUTION
The purpose of this check is to check for a duplicate
IP address. It does not assure that the IP address is
left non-duplicated because a unit having the same
IP address may be turned on after the check or the
same address may be set later.
When setting an IP addressing, ask the network
manager about duplication.
• Checking for influence of electrical noise
The "ping" command "-t" option is used for checking for the
influence of electrical noise. This option sends ping packets until
"Ctrl+C" is pressed.