PLCs are single-use electronic computing devices that are deployed to manage the operation of machines and electromechanical processes, primarily in an industrial context.
PLCs are often used in industrial applications to control manufacturing equipment, often alongside SCADA systems. They’re also used in nonindustrial use cases such as traffic lights and elevators.
Traditional PLCs are fixed-function appliances that are typically used for a single, specific purpose on the plant floor. Soft PLCs are software-based PLCs that can be run on general-purpose commercial hardware. Multiple soft PLCs can run on a single device.