Omron CX-INTEGRATOR - V1.1 Operation Manual page 123

3-1 Routing Table Overview
3-1-2 Network Conditions That Require Routing Tables
3-1-2 Network Conditions That Require Routing Tables
Routing tables must be set for the following network conditions.
Mounting Two or More Communications Units (See Note) to a Single CPU Unit
Routing table required.
Routing tables are not required when just one Communications Unit is installed in
each PLC and those Communications Units are connected in a single network.
Routing table not required.
Note: Network Communications Units include Controller Link Units, Ethernet Units,
Communicating with a PLC in Another Network
Routing tables are required when transferring FINS messages between networks or
using the CX-Programmer's remote programming/monitoring functions between
networks.
Setting Routing Tables in Two or More Nodes in the Same Network
Note
The following, however, is an exception. In this case, a local network table does not
need to be registered even if there is more than one Network Communications Unit.
If a local network table is not registered, network access will be possible to only the
network of the Communications Unit with the smallest unit number when a direct serial
connection is made to a target PLC.
3-4
CS/CJ-series DeviceNet Units, SYSMAC LINK Units, and SYSMAC NET Link Units.