[foxboro] PI question

Here's a question for all you PI-on-Foxboro gurus out there.  I was trying
to build my first PI output tag, meaning a tag whose value I can change from
a spreadsheet, for example, and have it automatically update on the I/A
system.  It took several attempts using trial and error to identify a
Foxboro "object" that was compatible with this kind of operation.  I
eventually ended up with getting a CALC.RI01 parameter as the
"InstrumentTag" in PI to work.  I tried a REAL.VALUE and a CALC.M01, and
neither one of those worked.  

Does anyone have a list of which types of Foxboro objects can be written to
by PI?  I really wanted to use the REAL.VALUE, because those blocks don't
take up any scan time.  Are those available to be written to, and I just
didn't do it right?  Are AOS objects an even better solution?  What do most
people use for PI output tags?

Tim Lowell
Control Systems Engineer
ConocoPhillips, Trainer Refinery
Phone:  610-364-8362
Fax:    610-364-8211
Tim.C.Lowell@xxxxxxxxxxxxxxxxxx


 
 
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