The reluctant rise of wireless in industrial control

Our understanding of electromagnetic waves and practical uses for them have been around for well over a century. This is where our friend Marconi pops up, with the first practical use of radio waves at the turn of the 20^th century.  How odd then that well into the 21^st century we have a technology that hasn’t been made obsolete by new advances yet whose application still remains a mystery and a fear to many of us working in the world of machine control and automation.

Let us put this into context – the discovery of electricity and how to harness it safely has ensured that this remains the key source of energy used worldwide. No better means to deliver energy to the majority of our machines exists today and it is even starting to replace more recent inventions – how much longer will the internal combustion engine be the source of motion for most of the worlds transport?

Conversely, many new technologies have led to the premature downfall of their predecessors – today I can stream the music I want to listen to using Spotify, which replaces the need for me to buy MP3 files from iTunes, which in turn replaced the need for me to buy CDs that I could play at home or in my car, which replaced the compact cassette that I put into my Walkman during my teenage years….you get  the idea –  each new step in technology makes the previous obsolete for the mass market.

Meanwhile in the world of industrial control, wireless communications is seen by many as a risk to the reliability of our machines and factories.  Yet we trust electromagnetic waves in practically every other part of our daily life, and even accept its occasional quirks.

Restricting new technologies

And yet for our machines and factories we often impose restrictive technologies that are perhaps the accepted norm. We vehemently demand that machine operators be fixed to a single point of a machine and not be mobile, whist at the same time expecting them to be more efficient or perhaps manage many machines simultaneously. And we think nothing of fitting pieces of copper between every input and output device in our control panels despite the cost and time taken to do so – perhaps it gives us the confidence that the signals will be transmitted and received?

Doesn’t this contradiction seem a little odd? We have no fear of wireless technologies in pretty much all of our lives and yet there is reluctance in the world of industrial control.  Perhaps we unwittingly stick our head in the sand (like the misunderstood and metaphorical ostrich) when faced with such “new” technologies that in fact should cause us no fear, and can bring many benefits in machine design and use, if we choose to embrace them.

See Jim Clark’s full article on the Schneider blog