224
Protocol Conversion Section 6-5
Note This configuration can be connected to other networks, as shown be-
low.
Sending FINS Messages or Sending/Receiving Data Using CMND(490), RECV(098),
SEND(090) in the CPU Unit’s Ladder Program
The Board/Unit converts the FINS messages to Host Link FINS in this opera-
tion.
Access from CPU Unit (on the Same PLC
)
Network-to-Serial-to-Network Details Routing tables to
treat serial
communications
path as network
Personal computers (e.g., CX-Pro-
grammer) connected through the
network to the PLC master can
access a PLC on another network
via a PLC slave that is connected
serially to the PLC master via Host
Link.
Required
FINS message
Serial Communications Unit/Board
Host Link header Terminator
CPU Unit
CX-Programmer, etc.
User-specified
FINS command
User-specified
FINS command
Protocol
conversion
Network (Ethernet,
Controller LInk, DeviceNet)
Used as Host
Link Master
User-specified
FINS command
RS-422A/485
(Host Link)
CS/CJ-series
or CVM1/CV-
series PLC
(Host Link
Slave)
Network (Ethernet,
Controller LInk,
DeviceNet)
CPU bus-to-Serial Details Routing tables to
treat serial
communications
path as network
Slave PLCs connected serially to
the Serial Communications Board/
Unit using Host Link can be
accessed from the CPU Unit in the
same PLC.
Optional
Serial Communications Unit/Board
Host Link header
Terminator
CMND(490)
CS/CJ-series or CVM1/CV-series PLC
Host Link Slave
CPU Unit
Protocol
conversion
FINS
mes-
sage
User-speci-
fied FINS
command
User-specified
FINS command
or
SEND(090)/
Used as Host
Link Master
RS-422A/485
(Host Link)
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