Is there a way to “force” a timestamp of a tag ?
The idea would be to retrieve history information from an external system and to write them in Ignition tags (value and timestamp). Those tags would then be exposed to another external system that will suscribe using OPC-UA.
The tracks I have in my for that are:
- a Tag Consuming Provider. I can’t find anywhere if the timestamps source is managed by the database (stored in a column) or by Ignition (the time Ignition reads the value in the database becomes the tag timestamp)
- a module that would get history from a database and write in a SimpleTagProvider. But I’m not sure that I can write a timestamp with this solution nor that I can expose such a tag provider for OPCUA.
Any clues / Ideas welcomed.