The Siemens Industry Automation Division has enhanced the Profinet functionality of its Simatic S7-300 and S7-400 controllers with Shared Device, Intelligent Device (I-Device) and Media Redundancy Protocol (MRP). These features facilitate easier system configuration, for example in failsafe applications, leaner and more versatile topology architectures with multiple networked controllers and higher plant availability. The new firmware also provides improved diagnostic functions via user-definable Web pages and supports isochronous mode via Profinet.