This document discusses PROFINET gateways and how they facilitate communication between PROFINET networks and other industrial networks like PROFIBUS, AS-I, IO-Link, and IIoT. It explains that gateways appear as an IO device on the PROFINET side and act as a master on the sub-network side. The document provides examples of configuration steps needed for different gateway types, such as adding their GSD/GSDML files to hardware configurations and mapping input/output channels. It also demonstrates a new PROFINET to PROFIBUS DP gateway product that allows a PROFINET controller to control PROFIBUS slaves.