Scan Class and OPC Data Mode - Read


I have question about how Scan Class and OPC Data Mode set as read in the transactions groups. If I have tags setup in the default scan class of 1 secs but I set my Transactions to OPC Data Mode Read does it overrides the scan class.

I assume the transaction trigger will be updated based on the scan class but when the condition is true SQL Bridge will force a tag read since I have OPC Data Mode set to read.