13 Troubleshooting
13-48
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
13-6 Troubleshooting
Use the following table to troubleshoot the system when the CPU Unit's ERR indicator is lit or flashing
when the EtherNet/IP Unit is mounted.
For details, refer to the CPU Unit's Operation Manual.
13-6-1 CPU Unit's ERR Lit or Flashing
An I/O verification error occurred. • Confirm that the Unit is connected properly.
• Compare the Unit Configuration with the actual configuration of Units
and correct the Unit Configuration.
A CPU Bus Unit setting error occurred. • A Unit model in the Unit Configuration is different from the Unit model
that is mounted in the Controller. Compare the Unit Configuration with
the actual configuration of Units and correct the Unit Configuration.
A CPU Bus error occurred. • Confirm that the Unit is connected properly.
• Restart the Unit. Replace the Unit if it doesn’t restart.
An I/O Bus error occurred. • Confirm that the Unit is connected properly.
• Restart the Unit. Replace the Unit if it doesn’t restart.
13-6-2 General Ethernet Problems
The 100M and 10M Indicators on the Ether-
Net/IP Unit are both OFF.
• Confirm that the cable being used has the correct ratings.
• Confirm that the cable is properly connected to the Ethernet switch,
and the Ethernet switch’s power supply is ON. (The 7-segment display
will indicate error E1.)
• If the Ethernet switch’s settings can be changed, confirm that the
Ethernet link settings are the same as the settings for the EtherNet/IP
Unit. (For details, refer to 2-4 Network Installation.)
The NS Indicator on the EtherNet/IP Unit is lit
red.
• Check whether the same IP address is set on another node. (The 7-
segment display will indicate error F0.)
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