We have a instance of Ignition collecting data from OPC servers and recording history both locally and on another Ignition instance in the cloud.
A question came up regarding the engineering units of the tags. Users are able to change the engineering units on local site depending on available sensors.
The problem we are encountering is how to reflect any changes to tags engineering units to the Ignition on the cloud.
From what have seen sqlth_* tables have no record of the tags attributes. So if user changes the source tag the cloud will not be aware of change.
Is this statement correct?
Alternatively, we are thinking of using external tag provider or have script that records the engineering units of each internal tag on an interval . Any time it changes it will record this change locally/cloud in SQL table.
Would this we good way to approach this issue?
Appreciate any thoughts and thanks in advanced