How to extract partial data from total kwh

Emoncms version: 9.8.31
Installation: Azure Vmachine
I have one wattmeter, It sends every 10 seconds the total consumption data, not the instantaneous ones, and I would like starting from this data to obtain the partial data in periods of 5 or 10 minutes, I imagine that I must do it with the virtual feeds, but I have not managed to find how

@nchaveiro created Virtual Feeds, he might be able to help.