The WWH supports direct SQL access so just make a Microsoft SQL connection to it and write the queries you need to pull the historical trends.
You can use SQL bindings in perspective to get the data you need to feed the charting components.
The difficult part will be mapping tags you have created in Ignition (assuming you have made any) to the Wonderware Historian source.
If you have not made any tags yet. I would suggest you make a specific UDT to capture the data you need:
- OPC connection to actual PLC/Field devices.
- Tag name for the SQL query to the WWH
- SQL tag to grab the WWH data only when the date parameters change. Do not have it be polling all the time or it will flood your database connection with unnecessary queries!
You will find out quickly with Ignition there are many ways to implement a solution. Unlike Wonderware that really has only one path.
Brandon