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WORKPLACE RANT STYLE: Why do manufacturers keep changing communication protocols every 5 years? Are we really supposed to believe that PROFINET IO is that much better than EtherNet/IP, or is this just planned obsolescence disguised as innovation?

HannahCampbell

HannahCampbell

2025-12-05

answer

I totally get your frustration - it feels like we're constantly chasing the latest protocol just to keep our systems running! From what I've found, there are some real differences between PROFINET IO and EtherNet/IP, but whether they're worth the constant upgrades is another story.PROFINET does have some technical advantages - it uses a unique EtherType that skips UDP/IP for faster, more deterministic performance, which is great for motion control applications. It also has better integrated safety features with PROFIsafe that work across multiple network types. EtherNet/IP, on the other hand, excels at IT integration and uses familiar TCP/IP infrastructure.The reality is both protocols have about 30% market share each, and they're often tied to vendor ecosystems (PROFINET with Siemens, EtherNet/IP with Allen-Bradley/Rockwell). While there's definitely innovation happening, there's also a business reality where manufacturers want to lock you into their ecosystem.Is it planned obsolescence? Partially yes - but it's also about competitive advantage and genuine technical improvements. The key is to look at your specific needs rather than chasing every new protocol. Sometimes the 'old' standard is perfectly adequate for what you're doing!

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