TIA v.16 - how to handle multiple task with slow PLC and do not loose data?

[bigplik]

Hi, I heard about some strategy that we can use even slow version of PLC to make a lot of data calculations,
which could be too much for particular PLC, but for eg. if you use "data buffer in TIA Portal" we don't lose any data
on the loop.

However I couldn't find enough explanation article about that data buffer.

I appreciate your information in this case.