Omron CJ2 User Manual page 118

4 Support Software
Precautions for Correct Use Precautions for Correct Use
Connecting to a Programming Device though the built-in EtherNet/IP port will not be possible if
the following errors occur:
• I/O bus error
• Too many I/O points error
• Duplicated number error
• Duplicated rack number error
• I/O setting error
If any of the above errors occurs and connecting to the Programming Device though the built-in
EtherNet/IP port is not possible, connect through the USB port.
4-12 CJ2 CPU Unit Hardware User's Manual