Abstract

The chapter is devoted to programmable logic controllers (PLC). We start from the classification of PLC, their architecture and cycle of operation. Next, the main laws of Boolean algebra are shown. We show the connection between the Boolean algebra and basic logic functions used in programming of PLC. Next, different programming languages used for PLC are shown. The last part is devoted to examples of programming for different Boolean functions and simple control algorithms. All programs are written using the Ladder Diagram language.

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