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Foreword If you have ever worked with Profibus PA networks, you surely will know about the so called Profibus DP/PA couplers. If not, please allow me to give you a brief resume:   The IEC61158-2 standard The IEC 61158-2 standard, finally approved in 1999, allowed the coexistence of two different technologies for process fieldbus communication …

A tale of two couplers: A (not too) brief story of Profibus linking devices Read More »

Being a Sci-Fi fan, I have a kind of affection for B class movies that feature aliens. One of my long time favorites is the 1982 version of “The Thing”, John Carpenter’s take on the Howard Hawks 1951 film called “The Thing from Another World”, which was adapted from a John W. Campbell novella titled …

The Thing from Process Control Read More »

A long time ago In the 90’s, I worked as sysadmin in a small automation supplies distribution company, how I got that job is an interesting story but I’ll reserve it for another time. Back then, broadband Internet access was a corporate luxury, and both cable modem and ADSL services were scarce and really expensive. …

A proxy story, part 1, V1.0 (A brief snapshot of Profibus PA to Profinet proxies, with a twist…) Read More »