Omron SYSMAC CJ1W-EIP21 - Manual (Page 215)

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Overview Section 7-1
Overall Structure
Note With the EtherNet/IP Unit or built-in EtherNet/IP port, message communica-
tions are possible even if the I/O link function is disabled.
CPU Unit
CMND(490)
instruction
CMND(490)
instruction
(2810 Hex)
FINS message
FINS Explicit message
FINS
message
function
Explicit
message
function
FINS message
Explicit message
OMRON special message communications
EtherNet/IP message communications
EtherNet/IP Unit
Ethernet (EtherNet/IP) network