Tag Data Links - Omron NXEIP202 User Manual

8 EtherNet/IP Communications
8-2

Tag Data Links

Tag data links enable cyclic data exchanges on an EtherNet/IP network between PLCs and EtherNet/IP
Coupler Units.
The settings for tag data links are made using the Network Configurator or other Support Software that
can edit settings for EtherNet/IP. Refer to 9-5 Setting Tag Data Links on page 9-36 for information on
how to make the settings.
Additional Information
For details on the tag data link setting procedure when connecting a master from another man-
ufacturer, refer to the manual for the master from the another manufacturer.
Tag Sets
The output data and input data for each node for which data is exchanged are set in the connection
information. These data are called the output tag set and input tag set. A tag set must specify at least
one tag. The size of the data for data exchange is the total size of the tags included in the tag set. The
size of the output tag set and the size of the input tag set must match.
Additional Information
If an I/O device is used, the Network Configurator must have an EDS file installed that includes
connection information for the I/O device.
Precautions for Correct Use
The EtherNet/IP Coupler supports one tag for the tag set. Multiple tags within a tag set are not
supported.
Originator and Target Devices
With a tag data link, one node requests the connection of a communications line to exchange data with
another node. The node that requests the connection is called the originator, and the node that receives
the request is called the target.
Variables in the EtherNet/IP Master
I/O memory addresses (e.g., in the CIO or DM Area) and symbols can be assigned to tags in the Ether-
Net/IP master.
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NX-series EtherNet/IP Coupler Unit User's Manual (W536)