25.07.2014 Views

RSView Supervisory Edition Installation Guide

RSView Supervisory Edition Installation Guide

RSView Supervisory Edition Installation Guide

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

5. Repeat steps 1 through 4 until all derived tags for the particular<br />

component are defined.<br />

6. Select Derived Tag Setup from the Setup menu.<br />

7. In the Derived Tag Setup dialog box type a description of the<br />

component and specify a maximum update rate, and then click<br />

OK.<br />

8. In the Derived Tag editor, click Close.<br />

9. Specify the name of the derived tags component and then click<br />

OK.<br />

About the maximum update rate<br />

The maximum update rate is the fastest rate at which the value of any<br />

derived tag in the derived tag component can be updated. Expressions<br />

containing derived tags are evaluated only when the value of a tag or<br />

function in the expression changes.<br />

Set a maximum update rate for each derived tag component.<br />

The maximum update rate also determines the fastest rate at which<br />

data servers can send changes in tag values.<br />

Set the update rate as fast as, or faster than, the rate at which the values<br />

of tags used in the expressions change, unless it is desirable to miss<br />

changes in tag values.<br />

Starting and stopping derived tag processing<br />

There are many ways to start and stop derived tag processing. Choose<br />

the way that works best for the individual application.<br />

For distributed applications it is best to start derived tag processing<br />

using a server component such as the startup macro, or using even<br />

processing. Having clients start and stop derived tags is not advised as<br />

one client could stop processing that another client still requires.<br />

Creating derived tags 10–5

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!