Using Ignition 7.8.2
I am testing with the code below where spectrumCompressed has been tried as both a string array and an integer array because the strings actually just represent integers:
[code]import datetime
startTime = datetime.datetime.now() - datetime.timedelta(minutes=5)
endTime = datetime.datetime.now()
dataSet = system.tag.queryTagHistory(paths=[‘spectrumCompressed’], startDate=startTime, endDate=endTime, returnSize=1200, returnFormat=‘Wide’)
print dataSet.getValueAt(0,0)[/code]
When I try various elements of the array (whether as string array type or integer array type) the first item (ie. print dataSet.getValueAt(0,0), or print dataSet.getValueAt(1,0), or print dataSet.getValueAt(2,0)…) always returns a proper timestamp. However the second item (ie. print dataSet.getValueAt(0,1), or print dataSet.getValueAt(1,1), or print dataSet.getValueAt(2,1)…) always returns “None”. I can see in the designer that these individual items are getting actual non-zero integer values (or integers as strings).
Trying to understand why I am getting the “None” values. Perhaps the actual values are not being stored or I’m not retrieving the values properly?
My Historical Scan class is set to “Evaluate on Change”
Thank you