
A.TROUBLESHOOTING APPENDIX B-63354EN/04
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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
This procedure can be used to just check whether the
IP address duplicates any one already in use at that
time. 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.
1 About the influence of electrical noise from peripheral
machinery (devices)
1) Turn the machine in which the Ethernet board is
mounted ON to enable communications.