National Instruments BridgeVIEW 用户手册

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页码 455
Chapter 3
Tag Configuration
© National Instruments Corporation
3-5
Note
Communication between the BridgeVIEW Engine and any device server is 
stopped temporarily when the Engine shuts down and restarts.
How Do You Create a Tag?
From the main panel of the Tag Configuration Editor, press one of the 
following buttons: Create Analog Tag(s)…Create Discrete Tag(s)…
Create String Tag(s)…, or Create Bit Array Tag(s)…. A separate 
window prompts you to define a new tag. The tag name must be unique 
within a given configuration (
.scf
) file. Select OK on the pop-up window 
when you finish creating the new tag, or Create New Tag to finish creating 
the new tag and create another tag of the same type. Any changes are not 
written to disk until you select Save from the File menu. For step by step 
instructions on using the Tag Configuration Editor to create a tag, see 
Activity 3-1, later in this chapter.
How Do You Edit a Tag?
From the main panel of the Tag Configuration Editor, select one or more 
tags from the tags listed and press the Edit Tag(s)... button. A separate 
window displays the attributes for the tags you select, which you can then 
edit. When you finish editing a tag, select OK to save your changes and 
return to the main panel, Edit Next Tag to save your changes and go on 
to the next tag, or Cancel to discard your changes and return to the main 
panel. Selecting Cancel only cancels the changes made to the current tags. 
Any changes you make are not permanent until you save the configuration 
file.
You also can use a spreadsheet to edit multiple tags. Use File»Export… to 
export the tag information to a spreadsheet file, edit the fields, and then use 
File»Import… to import the tag configuration information from the edited 
spreadsheet file. For more information, see the section 
 in this chapter.
How Do You Delete a Tag?
To delete a tag from a configuration, select the tag(s) from the main panel 
of the Tag Configuration Editor and press the Delete Tag(s) button, and 
then save the SCF. Tags that will be deleted when you save the SCF are 
marked with a trashcan symbol. The Delete Tag(s) button also serves as an 
Undelete Tag(s) button if all selected tags have a trash can symbol. If you 
decide you want to keep one or more deleted tags, select those tags and 
press the Undelete Tag(s) button.