Omron CJ - 08-2008 - Page 171

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Expanded System Configuration Section 2-5
FINS Messages
FINS (Factory Interface Network Service) messages are commands and
responses that are used as a message service in an OMRON Network. FINS
messages enable the user to control operations such as sending and receiv-
ing data and changing operating modes when necessary. The features of
FINS messages are as follows:
Flexible Communications
FINS messages are defined in the application layer and do not rely on the
physical layer, data link layer, or other lower-level layers. This enables flexible
communications on the CPU bus and different types of networks. Basically,
communications with Ethernet, Controller Link, or Host Link Networks, and
between the CPU Unit and CPU Bus Units is possible via the CPU bus.
Note A TCP/IP header must be attached to the FINS command for an Ethernet Net-
work, and a Host Link header must be attached to the FINS command for a
Host Link Network
Supports Network Relay
Up to three network levels (eight levels for unit version 2.0 or later), including
the local network, can be bypassed to access other Racks.
CMND(490)
FINS
FINS
FINS
FINS
Network
PLC (Host Link slave)
Serial Communications
Board/Unit with unit
version 1.2 or later
Serial
Gateway
PLC (Host Link Master)
Host Link
header
Host Link
terminator
Host Link
header
Host Link
terminator
FINS command
sent
CX-Programmer or other
Programming Device
that uses CX-Server as
the communications
driver
FINS
TCP/IP
FINS
FINS
FINS
Controller Link
Host Link
Ethernet
CPU Bus Uni
t