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control program Archive
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History of Programmable Logic Controllers
Posted on October 21, 2011 | 2 CommentsThe primary goal of PLC ( Programmable Logic Controller) was eliminate the high costs of inflexible, relay controlled systems. General Motors Corporation specified the design criteria for the first programmable controller in 1968. . The... -
Importance of documentation in PLC programming process
Posted on April 21, 2011 | 1 CommentPLC programming is important for a well-run application program, but all that work is lost without adequate system documentation. Without documentation, system activities, such as changes, installation and maintenance, are difficult...