Omron CJ1G/H-CPU series Operation Manual page 154

Expanded System Configuration
Host Link
FINS
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.
Ethernet
TCP/IP FINS
FINS
Controller Link
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.
Note With CS/CJ-series CPU Units Ver. 2.0 or later, remote programming/monitor-
ing is possible up to 8 levels away. Refer to 1-5-2 Improved Read Protection
Using Passwords for details.
Access to CPU Unit Plus Other Devices on Racks
The CPU Unit, CPU Bus Units, personal computers (boards), and other
devices can be identified and specified using unit addresses.
Network 2
Network 1
CPU Bus Unit
CPU Unit
Section 2-5
CPU Bus Unit
FINS
Network 3
Personal
computer
board
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