Omron SYSMAC CJ1W-EIP21 Operation Manual page 217

Section 7-2
FINS Message Communications
Up to 8 network levels, including the EtherNet/IP network, can be crossed.
Controller Link Unit
Controller Link Unit
CS/CJ-series EtherNet/IP Unit
CS/CJ-series CPU Unit
Remote I/O communications
CS/CJ-series EtherNet/IP Unit
Controller Link
Ethernet (EtherNet/IP)
CS/CJ-series EtherNet/IP Unit
Ethernet (EtherNet/IP)
Note FINS commands sent and received by the CS/CJ-series EtherNet/IP
Unit include commands addressed to the CS/CJ-series CPU Unit
and commands addressed to the CS/CJ-series EtherNet/IP Unit.
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