Omron CJ - REFERENCE MANUAL 07-2009

77
Serial Gateway Overview Section 3-6
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 PC
)
Access from CPU Unit (on Network PC)
Note This configuration can be connected to other networks, as shown be-
low
Note (1) The FINS header contains the following information.
CPU bus-to-Serial Details Routing tables to treat serial
communications path as network
Slave PCs connected serially to
the Serial Communications Board/
Unit using Host Link can be
accessed from the CPU Unit in the
same PC.
Optional
Serial Communications Unit/Board
Host Link header
Terminator
CMND(490)
CS/CJ-series or CVM1/CV-series PC (Host Link Slave)
CPU Unit
Protocol
conversion
FINS
mes-
sage
User-speci-
fied FINS
command
User-specified
FINS command
or
SEND(090)/
RECV(098)
Used as Host
Link Master
RS-422A/485
(Host Link)
Network-to-Serial Details Routing tables to treat serial
communications path as network
Slave PCs connected serially to
the Serial Communications Board/
Unit using Host Link can be
accessed from a CPU Unit in a PC
connected to the network.
Required
FINS message
Host Link header
Terminator
CS/CJ-series or CVM1/CV-series PC (Host Link Slave)
Serial Communications Unit/Board
CPU Unit
CMND(490)
or
SEND(090)/RECV(098)
User-specified
FINS command
Protocol
conversion
User-specified
FINS command
Used as Host
Link Master
RS-422A/485
(Host Link)
Network (Ethernet,
Controller LInk, DeviceNet)
Network-to-Serial-to-Network Details Routing tables to treat serial
communications path as network
CPU Units in PCs connected to
the network can access a PC on
another network via a PC slave
that is connected serially to the
Serial Communications Board/Unit
via Host Link.
Required
FINS message
Serial Communications Unit/Board
CPU Unit
Host Link header
Terminator
CMND(490)
or
SEND(090)/
RECV(098)
User-specified
FINS command
Network (Ethernet, Controller
LInk, DeviceNet)
Protocol
conversion
User-specified
FINS command
RS-422A/485
(Host Link)
Used as Host
Link Master
CS/CJ-series or
CVM1/CV-series PC
(Host Link Slave)
User-specified
FINS command
Network (Ethernet,
Controller LInk, DeviceNet)