Data not being returned when system.historian.queryRawPoints
Hi all,
When I query for raw data points nothing is being returned?
Im using Canary Module version 26.0.0 (b260821045) on Ignition 8.3.8
end = system.date.now()
start = system.date.addMinutes(end, -60)
print system.historian.queryRawPoints(
paths=["[canary-historian]280QWP7SVR3/strandfontein-mar/site/mar-54_sim/flow/pulse_count"],
startTime=start,
endTime=end
)
Using the powerchart I can see the data is there.
No error is being thrown in the logs or console just getting a empty dataset
4 replies
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Is there something obvious that I am doing wrong?
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Hi ,
It looks like the syntax has been updated since we've last looked at this. I got this to work following Code Snippet 2 seen here.
My example is below:
I think this will work for you based on your screenshot:
end = system.date.now() start = system.date.addMinutes(end, -60) print system.historian.queryRawPoints( paths=["histprov:canary-historian:/sys:ignition-280qwp7svr1:/prov:default:/tag:strandfontein-mar/site/mar-54_sim/flow/pulse_count"], startTime=start, endTime=end )I updated the documentation for the module to include the new syntax: Module Installation & Configuration (Canary v24+ and Ignition v8.3) - Ignition Module Release Notes - Canary Community.
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Unfortunately doesn't work, here is the powerchart path:
histprov:canary-historian:/drv:ignition-280qwp7svr1:default:/tag:280QWP7SVR3/strandfontein-mar/site/mar-54_sim/flow/pulse_count -
Okay Claude figured it out:
end = system.date.now() start = system.date.addMinutes(end, -60) result = system.historian.queryRawPoints( paths=["histprov:canary-historian:/drv:ignition-280qwp7svr1:default:/tag:280QWP7SVR3/strandfontein-mar/site/mar-54_sim/flow/pulse_count"], startTime=start, endTime=end ) print(result)
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