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Chart with Tag Query

Similarly to this post SPC Chart - Multi Line Display

I have a Tag Query pulling data for the past X number of days and then display it in a chart.

I want to add to 2 fixed lines into this chart, similar to an SPC Chart -

basically showing how close/off that tag is from these lines.

The only thing I can think off is changing my Tag Query to a SQL query and adding these two fixed values in there ---but I would rather not do that. I would prefer to keep the Tag Query (reusability purposes)

Come on applet lovers, show me the way and tell me what to do to get them in there!



'Applet Lovers' - is that a new at Pizza Hut?

If you wrap your TagQuery in a BLS trx and create an IllumDoc that looks like:

DateTime Line1 Line2

SD 12 34

ED 12 34

Then just merge the two documents (the TagQuery and the IllumDoc) so you will have a full OutputXML from the TRX that looks like:


<Rowset/> {Tag.1}

<Rowset/> {Tag.n}



The iChart will then see the limit lines as if they were tagnames all along and will plot two lines from SD to ED.

If you only have a single Rowset returning from you TagQuery, then even easier would just be to add a CalculatedColumn block onto it with 2 static number columns. The chart will like this format too (a lot like a multiple tagname Simulator query).



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