Rockwell Automation 1756-HIST2G FactoryTalk Historian ME 2.2 - Manual (Page 226)

F ACTORY T ALK H ISTORIAN ME U SER ’ S G UIDE
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5. (Optional) Create a tag attribute file. Go to “Creating Tag Attribute Files” for
details.
6. Add a rule to the current rule file. See “Defining Rules” for more details.
7. Click [Save] to save your work.
Defining Rules
Once you have your rule file created, use the following steps to add rules to the file.
When defining rules, note the following:
„
The data point (tag) name in a FactoryTalk Historian ME consists of multiple
nodes separated by a period “.”
„
When you search with a rule that has more than one condition defined, all
conditions have to be met within a single controller.
1. Click [New]. This opens the Define Discovery Rule dialog.
Use this dialog to specify the rule or condition for use in the point discovery
process. The data points (tags) that are found during the discovery process are
listed and can then be added to the FactoryTalk Historian ME server. This is also
where you associate a Tag Attribute file with a rule. The result of associating a
Tag Attribute file with a point discovery rule is that all FactoryTalk Historian ME
points discovered using that rule take on the attributes defined in the Tag
Attribute file. This is useful in cases where you want all points that were
discovered using the same rule to have the same set of attributes.