EGR exchanger exclusion valve: meaning

[DonGebhado]

Dear All!

Fiat Ducato 2.3 Multijet
Marelli 9DF

What is the meaning of the entry:
"EGR exchanger exclusion valve"?

The values seem to be ON/OFF or in live data "Active/Not Active".

To which EGR does it refer, high pressure or low pressure?
Which exchanger (assume heat exchanger/intercooler) is controlled by this?

Thank you!