The programmable automation controller has sprung from the personal computer that came to life in the early 1980's. Before that time manufacturing automation was depending on a very structured, but very capable set of logic controllers. These ladder logic-based computers were extremely good at the jobs they had to do, even though they were limited in he scope of tasks that they could perform.
Source: http://EzineArticles.com/6334203
No comments:
Post a Comment