I got an alarm that the value was over 10.679 (alarm setpoint) then checked the chart to confirm.
Then I noticed that the spikes disappear completely when this boolean is unchecked.
I couldn’t recreate it by using system.tag.queryTagHistory. According to the resulting dataset, the values inside the time ranges of the big spikes never exceeded 10.000.
Furthermore, if you zoom in the exact minute the spikes also disappear.
Is the chart showing the weird spikes because of my Tag History Resolution?
Aside from the visual represenatation, if I can’t retrieve it through a query does it mean that a value able to trigger the alrarm was not stored in the database ?
And lastly, the values are appearing when the boolean is ON. The tooltip suggests that these spikes should get hidden when the boolean is OFF. Purhaps the tooltip should state the opposite and it just hasn’t been corrected yet ?