Rockwell Automation Logix5000 Controllers I/O and Tag Data Programming Manual - Manual (Page 65)

Data access control Chapter 4
Important: For alias type tags, the External Access list is unavailable. You are not allowed to change the external
access of an alias tag. However, the External Access list updates its value to be the same as the external
access of the base target.
See
Find a base tag with Go To on page 69 for procedures to locate the base tag for an alias.
See External access availability on page 70 for additional tag considerations.
Configure external access in the New Tag dialog box
You can create the following types of tags in the New Tag dialog box.
• Base
• Alias
• Produced
• Consumed
The parameters on the dialog box depend on the type of tag you are creating. For
tag descriptions, see
Tag type on page 22 .
You choose the external access attribute for a new tag in the External Access list
on the New Tag dialog box. Follow these steps.
1. In the Controller Organizer, right-click Controller Tags and then click
New Tag.
2. In the New Tag dialog box, in the Type list, choose a tag type.
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