Rockwell Automation 1756-HIST2G FactoryTalk Historian ME 2.2 - Manual (Page 78)

F ACTORY T ALK H ISTORIAN ME M ODULE U SER ’ S G UIDE
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When selecting a scan rate, it is important to be aware that points that have an
invalid scan rate configured will not be created. The valid scan rates are as
follows:
‡
Advised and Polled - equal to or greater than 0.5 seconds.
‡
High Speed - equal to or greater than 0.01 seconds and equal to or less than
0.5 seconds.
Any point that was not created is listed in the Review Results page with the
reason it was not created.
4. Click the checkbox next to the name of the controller that you wish to use for a
data search.
A list of all online controllers in the same chassis is displayed next to the Start
Search In checkbox by default. FactoryTalk Historian ME supports Data
Collection from a maximum of four controllers.
5. Click [Show Tags] to search for tags in the selected controllers.
6. An informational message will appear to indicate data is being retrieved from the
controller.
See “Reviewing Results” for an image of the Review Results page.