Edge Historian Scripting not working?

Ignition
1

Hi,

I can pull a tag history from the edge historian using script (system.tag.queryTagHistory()). This works fine in the Script Console but I can't seem to get a value (other than zero) when I run the same script in either a gateway scoped script, or even in a binding in Perspective.

Is there some limitation on using system.tag.queryTagHistory() in Edge?

Sample code that works in Designer but only gives zero else where:

	path = "[Edge Historian]rio/crc_t_1"
	start_date = system.date.parse("29/12/2024 0:00", "dd/MM/yyyy hh:mm")
	end_date = system.date.parse("1/1/2025 0:00", "dd/MM/yyyy hh:mm")
	v_avg = system.tag.queryTagHistory(paths=[path], startDate=start_date, endDate=end_date, aggregationMode="Average", returnSize=1)
	v_avg = v_avg.getValueAt(0,1)

A print(v_avg) in designer gives me 51.212...... where as in gateway event I get 0 ??

Thanks for your insights.

2

Sorry all,

I figured it out. The historical path should be:

[Edge Historian/edge]rio/crc_t_1

the "/edge" was crucial here - eventhout in the script console it didn't throw errors.