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1 International Journal of Electronics and Telecommunications

1 2014

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About Implementation of IEC 61131-3 IL Function Blocks in Standard Microcontrollers

Chmiel M., Mocha J., Hrynkiewicz E., Polok D.

International Journal of Electronics and Telecommunications

2014

Vol. 60, No. 1

42-46

The paper presents considerations on implementation of function blocks of the IL language, as fragments of control programs that use these blocks. Subsequently, the predefined function blocks of the IL language have been applied to implementation in a Central Processing Unit for a programmable controller based on standard microcontroller from such families as MCS-51, AVR and ARM with the Cortex-M3 core. The considerations refer to the IL language revision that is fully compliant with the IEC-61131-3 standards. The completed theoretical analysis demonstrated that the adopted method of the module description is really reasonable and offers substantial advantages as compared to direct calls of function modules already developed as subroutines. Also the executed experiments have proved the feasibility to arrange central units of programmable controllers on the basis of standard microcontrollers and such central units may be competitive to compact CPUs available on the market for typical PLCs.