A specific implementation of IEC 61131-3 software model

@article{Plaza2004ASI,
  title={A specific implementation of IEC 61131-3 software model},
  author={Inmaculada Plaza and Carlos T Medrano},
  journal={Proceedings World Automation Congress, 2004.},
  year={2004},
  volume={16},
  pages={223-230}
}
In this paper, we review the main concepts of IEC 61131-3 software model and we discuss some of the weak and ambiguous points of the standard that should be clarified before implementing it. We also show the main guidelines of a specific implementation, based on POSIX/C and its Real- Time extensions, which is a much more general framework. This will facilitate the exccution of PLC-like system on a wide range of computers, provided their operating system is POSlX compliant. We consider the… CONTINUE READING

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