Siemens SINAMICS G150 Operating Instructions Manual page 315

Application class 2 (standard drive with technology function)
The overall process is subdivided into a number of small subprocesses and distributed
among the drives. This means that the automation functions no longer reside exclusively in
the central automation device but are also distributed in the drive controllers.
Of course, this distribution assumes that communication is possible in every direction, i.e.,
also cross-communication between the technology functions of the individual drive
controllers. Specific applications include setpoint cascades, winding drives, and speed
synchronization applications for continuous processes with a continuous web.
Figure 6-30
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
Application class 2
6.7 Communication according to PROFIdrive
Operation
313