Processing Unit

Processing Unit 1:
Expand Solution Explorer > TwinCAT Project > SYSTEM
Right-click on TcCOM Objects to open the context menu
Click Add New Item... in the context menu
Processing Unit 2:

The Insert TcCOM Object dialog box opens.

Expand Beckhoff Automation GmbH > XTS Modules
Select XtsProcessingUnit [Module]
Double click on the selection or confirm with OK

A Processing Unit is added to the TcCom objects.