Omron CJ2 CPU UNIT SOFTWARE User Manual page 145

Network Symbol Usage Conditions and Handling
Handling Network Symbols from the Outside
Symbols set as network symbols in the CPU Unit are recognized as tags from outside the PLC
(such as by a host, PT, Network Configuration Tool, or other PLCs).
CPU Unit
User program
(network symbols)
Symbols table
Network Symbol Applications
Using Network Symbols as EtherNet/IP Data Link Tags
The data in a remote PLC can be specified with tags by using EtherNet/IP tag data link communica-
tions. Set to the network symbol to Input or Output in the Network Symbol Column in the Global
Symbol Table.
CJ2 CPU Unit
Node #1
Global symbol table
Address Data type Network Symbol
Name
A D100
CJ2 CPU Unit Software User's Manual
Tags
Tag access
(Access with network symbols using CIP
message communications or EtherNet/IP
data link communications)
Example: Data link from B to A
Name: A
EtherNet/IP
WORD INPUT
By using tag data link communications, the data in D200 of
the CJ2 CPU Unit at node #2 is copied to D100 of the CJ2
CPU Unit at node #1.
5 Understanding Programming
Outside the CPU Unit
(e.g., host, PT, other PLC,
Network Configuration Tool)
Host
NS-series
application
PT
Name: B
CJ2 CPU Unit
Node #2
Global symbol table
Address Data type
Name
B D200 WORD
Another
PLC
Network Symbol
OUTPUT
5-53
5