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What OS Actually Runs Inside a Siemens PLC?
What's actually running inside a Programmable Logic Controller? The answer is far more complex than a simple "bare-metal" vs. "full OS" binary. This episode explores the surprising diversity of operating systems powering industrial automation — from Siemens' proprietary S7 firmware and the shift to Mentor Graphics' Nucleus RTOS in newer S7-1200/1500 controllers, to Rockwell's long-standing use of VxWorks, Beckhoff's radical Windows-based TwinCAT architecture, and the cautious emergence of Linux and Codesys. We trace the evolution from monolithic firmware blobs to modern RTOS kernels with…
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