Omron SYSMAC 3G8F7-CLK13-E Operation Manual page 32

Overview
Message Service
12
Computer
User application
ClkWriteDatalink( )
CIO
Event
memory
FinsGateway
Controller Link Support Board
FINS commands and FINS responses can be sent and received for specified
nodes on the network by executing FINS message send/receive functions
ClkSendFins( ) and ClkRecvFins( ) from the user program.
Computer
User application
ClkSendFins( )
FinsGateway
Controller Link (PCI) Embedded Edition
Controller Link Support Board
A maximum of 4 PCI Bus Controller Link Support Boards can be mounted to
one computer. Consequently, multiple user applications can be executed
simultaneously.
ClkReadDatalink( )
DM
Data link
Controller Link Network
ClkRecvFins( )
Controller Link Network
Section 1-1
PC
PC