Programmable Logic Controller Overview in Industrial Automation –…
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What Are PLCs?
Traditionally, programmable logic controllers (PLCs) are single-use electronic computing devices that are deployed to manage the operation of machines and electromechanical processes, primarily in an industrial context. Today, manufacturers and other industrial organizations are embracing soft PLCs: software-based controllers that can run on widely available general-purpose PC hardware. Multiple soft PLCs can be hosted on a single device. Both traditional and soft PLCs are commonly used in conjunction with SCADA systems and human-machine interfaces (HMIs).
How PLCs Work
PLCs use the ladder logic programming language to enable engineers to build virtual circuits that can control electromechanical systems. They feature rugged designs that can tolerate harsh conditions and strenuous industrial applications. Because PLCs are often used in time-sensitive applications, they’re capable of scanning inputs and executing programming extremely quickly. Input/output (I/O) connections enable the PLC to receive information from connected equipment and output the appropriate instructions.
