Along with HART and Foundation Fieldbus, PROFIBUS is one of the most important communication protocols for digital field devices in the process industry. By supporting digital communication and manufacturer-independent device exchange, it offers the best conditions for controlling, monitoring, and streamlining production processes. But to make the communication architecture fit for the requirements of IIoT applications, faster data transmission is needed. For this purpose, modern Ethernet-based PLCs are available, which allow existing PROFIBUS networks in the process industry to be expanded with modern and highly functional segments.