OpenPLC: how industrial are you?
summary
OpenPLC is a tiny C runtime that runs on Raspberry Pi, Arduino and in Docker and gets compared to commercial virtual PLCs like codices and seammens using a synthetic Fibonacci load test. Under identical loads OpenPLC shows three times as much jitter and uses about three times the CPU, yet jitter stays in the few-hundred-microsecond range so it handles mid-speed automation. EtherCAT via a MacVLAN kernel module adds only 2–10 microseconds latency but requires manual compilation; recommended fixes are CPU pinning, resource control and automated stack builds.
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chapters (8)
- 0:00Introduction and background
- 1:31What is a PLC
- 3:18Proprietary limitations of PLCs
- 4:00OpenPLC overview and features
- 6:33Performance comparison setup
- 8:45Jitter analysis and results
- 10:56Networking and field buses
- 12:44Conclusions and future work
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