Creating a calculated PI tag using PI Performance Equation

So now, DOE requested for a reading from our CEMS system. They wanted a 30 mins average tag for NOx and CO reading.

PI Performance Equation can be used to provide average reading for CEMS_NOX and store it using new tag name.

In this case, we use a new tag called CEMS_NOX_2.

the most important part is to correctly specify the calculation formula under ExDesc attribute.

this is what i used.

TagAvg('CEMS_NOX','*-30m','*')

the format is actually...

TagAvg(tagname,start time, end time)

using PI Processbook, u can verify the tag's attribute..