![]() ![]() As PLCs took over this process, it was essential to keep a similarity of the old system thus, ladder logic was created as the first PLC programming language. ![]() Relays were costly, required constant maintenance, and could not be easily reconfigured. Before Programmable Logic Controllers, manufacturing plants employed relay-based circuitry to energize different loads based on how the relays were wired together. Ladder Logic is one of the top 5 most popular types of PLC programming languages used in manufacturing environments.
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