Hi,
Currently im involved in a project to read about 40k tags (energy meters) and store in a database, the problem is that the read process takes to long time and now i need some help to find a better solution for this. The initial conscept was to iterate thru the OPC server and then find all leafes that match a filter criteria, then readvalue and store.
But now i'm more into something like doing a subscribe and ceep the tags active so that the poll reads from a updated memory casche instead. Im not sure the conscept of changed value events is a good way for this approuch but im interested in any good ideas.
Also i might add that the available meters changes often in the OPC server and therefore te process needs to refresh the tags about 4 times per day.
Best regards
Fredric
Currently im involved in a project to read about 40k tags (energy meters) and store in a database, the problem is that the read process takes to long time and now i need some help to find a better solution for this. The initial conscept was to iterate thru the OPC server and then find all leafes that match a filter criteria, then readvalue and store.
But now i'm more into something like doing a subscribe and ceep the tags active so that the poll reads from a updated memory casche instead. Im not sure the conscept of changed value events is a good way for this approuch but im interested in any good ideas.
Also i might add that the available meters changes often in the OPC server and therefore te process needs to refresh the tags about 4 times per day.
Best regards
Fredric