There are some other posts that talk about the same subject , and the truth is that they conclude that it is not feasible to make the conversion
of OPC A&E tags ---> Event Frames. It is a pity but actually this will not be leveraged as the A&E specification is sort of "out of date". With the new OPC UA
specification the alarms and events are automatically converted into event frames using the standard PI Connector for OPC UA.
One thing you should foresee is to assign the custom fields of your DeltaV which relates to your Batch & equipment, to make it more distinguishable.
If you would need further analysis for your site, in my company (AG Solution Group) we created an off-the shelf solution for Alarm Management , what
it does is to acquire alarms and events data (from PI System) and we show the main standard reports and alarm KPI's defined in ISA 18.2 and EEMUA 191.