Ethernet APL is often viewed as the next step in industrial communication within the process industry. Technologically, this picture is accurate. The components are available, suppliers deliver quality, and initial applications prove that it works. Yet, widespread adoption remains elusive. This raises an uncomfortable question: what are we waiting for?
The honest answer: not on technology. But on clarity.
In practice, it appears that the foundations are not yet clear within the chain, and this starts with the definition of terms (what is Ethernet APL and what is it not...). Incorrect assumptions carry the risk that users choose solutions that do not fit their application. That is not a minor detail. If the market lacks a clear understanding of the fundamentals, every subsequent step becomes shaky. In that case, more technology will not help; what is needed first is a shared understanding.
This brings us to a second point. Ethernet APL operates within an open ecosystem. Its strength lies in combining components, suppliers, and protocols. But that is precisely where the problem lies. The industry knows that collaboration is necessary, yet for years it has struggled to bring all parties together. Openness is embraced in theory but proves stubborn in practice.
Meanwhile, the discussion is shifting. It is not the engineer – because technically it works fine – but the decision-maker who asks the decisive question: what are the benefits? Less downtime, lower costs, more flexibility. Without a convincing business case, Ethernet APL remains stuck in pilots and demos. Promising, but not decisive.
And then there is the promise of a single Ethernet standard. One language for the industry. But a closer look reveals that this reality is more complex. Multiple protocols can simply continue to exist. Perhaps that is not a problem, but a given. The real challenge lies not in uniformity, but in interoperability — systems working together despite the differences.
At the same time, this raises a significant cybersecurity issue. This is hardly an issue with traditional I/O loops, but on APL, multiple protocols can run side-by-side—an attractive starting point for hackers. If we do not address this problem seriously, cybersecurity could become a potential showstopper for this innovation.
Ethernet APL therefore no longer requires a technological breakthrough. That already exists. What is missing is something more fundamental: a clear language, genuine collaboration, and the willingness to make choices.
The question is not whether Ethernet APL will become the standard.
The question is who dares to act with the confidence that the foundation is already in order.
