latest standard (IEC 1131-3) (1 maio 1990 ano – 1 nov 1999 ano)

Descrição:

In the 1990’s there were less new communication protocols introduced and the latest standard (IEC 1131-3) tried to merge the PLC programming languages into on international standard. PLCs were also being programmed using functional block, instruction list and structured text and PCs started to replace the PLC in some applications.

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