The first PLCs were produced in the late 1960's early 70's. Starting in 1964 with a GM requirment document. The Modicon 084 dated 1968 was the first, unless you know better.
So one way or another we are reaching the 50th aniversery of these devices.
Since I finished on the C & A executive I have become involved with the IET History of Technology TPN and I am writting a paper on the introduction and developement of PLCs.
Having started work with them in the mid 70's they cover a good part of my working life at Schneider Electric. Throught tthis I have knowledge on Telemecanique, Modicon, Suare D, April and Merlin Gerin Brands but only general information on the rest.
Can you help with any of the following?
Early Development of the PLCs, not much appears to have been published.
Background of PLCs from outside USA & EU, I realy know nothing about the Japanese.
Any photographs of early installations.
Your experiances with early systems, Languages, Training, Selling the concept.
Regards
John Pittwood
