User Manual
Table Of Contents
- Logix5000 Controllers I/O and Tag Data
- Summary of changes
- Table of contents
- Preface
- Communicate with I/O modules
- Organize tags
- Force I/O
- Data access control
- Introduction
- External access
- Configure external access
- External access availability
- User-defined type considerations
- Add-on instructions external access considerations
- Tag mapping considerations
- Imported tag behavior
- Constant value tags
- Configure constant tags
- Constant check box availability
- Add-on instructions constant value considerations
- Index
Data access control Chapter 4
2. In the Parameter/Local Tag Properties dialog box, select the Constant
check box.
3. Click OK.
See Constant check box availability on page 80
for considerations.
Designate a constant in the Tag Editor
The Constant column in the Tag Editor lets you designate tags that cannot be
modified in the Logix Designer program. The Constant property applies to an
entire tag; all members of the tag take on the same setting. The Constant column
cells are blank for members of the constant tag.
An error message appears if you try to change the data type of a constant tag to a
data type that cannot be constant.
Follow these steps to add a constant value in the Tag Editor.
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