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7-7
7 Tag Data Link Functions
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
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In this manual, the connection information that is set is called tag data link parameters. This section
describes how to set tag data links with the Sysmac Studio and the Network Configurator.
First, create any variables that you want to use for tag data links as network variables in the Sysmac
Studio.
1
Set the Network Publish attribute to Input or Output in the Global Variable Table for the variables
you want to use for tag data links (i.e., as tags).
2
To maintain concurrency in tag data within a tag set, set all tags (i.e., variables with a Network
Publish attribute) within the same tag set as follows:
Set a refreshing task for variables with a Network Publish attribute to maintain concurrency as
described below for tag data link data.*
Note If a variable that uses an AT specification is used as a tag, you do not need to set a refreshing task. It is
refreshed in the primary periodic task.
Refer to 7-1-7 Concurrency of Tag Data Link Data for details on the concurrency of tag data link
data.
• Maintain concurrency in the tag data in a tag set.
• The timing of updating network variables that are assigned to tags is synchronized with the
execution period of the program that accesses the network variables.
Precautions for Correct Use Precautions for Correct Use
You cannot use the following notation, which specifies an I/O memory address, in the variable
name of any variable used in a tag data link.
1) Variable names that contain only single-byte numerals (Example: 001)
2) Variable names with the following single-byte letters (uppercase or lowercase) followed by sin-
gle-byte numerals
• H (Example: H30)
• W (Example: w30)
• D (Example: D100)
• E0_ to E18_
7-1-4 Overview of Operation
Setting Network Variables (Sysmac Studio)