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5-5SectionR: Routing Table
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5-5-1 Outline of Routing Tables
Routing tables must be set when the local node communicates with PCs, com-
puters, and other nodes on remote networks. Routing tables need not be set
when the node communicates only with other nodes on the local network.
Note For CVM1 or CV-series CPU Units manufactured before April 1996 (lot No.:
jj46), always set routing tables. Refer to the Controller Link Units Operation
Manual (W309) for details.
Routing tables define communications paths when a local node communicates
with nodes on remote networks.
The following is a network example and the data required to create routing tables
is explained below.
Computer
Programming Device
(Controller Link Support
Software)
SYSMAC NET
(network 2)
Controller Link Network
(network 1)
Controller Link Unit
(unit number 0)
Gateway
SYSMAC NET Link Unit
Controller Link Unit
(node address 5)
In this network example, when the PC connected to the Programming Device on
network 1 is to communicate with a PC on network 2, you need to create routing
tables containing the following information and transfer them to the PCs and
computer on network 2.
• The local node belongs to network 1 (local network).
• The unit number of the Communications Unit is 0 (link unit number).
• Communications is performed via the Communications Unit with node ad-
dress 5 that belongs to network 1 (relay node).
• The local node communicates with the remote network via network 1 (relay
network).
• The local node communicates with a node on network 2 (end network).
Routing Tables for PC (A)
Local Network Table
Local network Link unit number
001 00
Relay Network Table
End network Relay network Relay node
002 001 005
About Routing Tables