It’s easy to learn, mimics electrical circuits, and is easy to troubleshoot once deployed. Each rung of the ladder spans from left to right and is executed from top to bottom by the PLC.Īs mentioned above, ladder logic is extremely popular among PLC programmers.
On the left side, ladder logic instructions are set as conditions, while the ones on the right side are instructions that are triggered if the conditions are met.
Ladder Logic is labeled as such because the software is laid out in the shape of a ladder. 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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