Programmable Logic Controllers Principles And Applications [TRUSTED]

While PCs handle event-driven operations (e.g., "when the user clicks the mouse, run this code"), PLCs are deterministic. Given the same inputs at the start of a scan, the outputs will always be the same at the end of the scan. This reliability is non-negotiable when controlling a 1,000-ton hydraulic press.

A Programmable Logic Controller (PLC) is an industrial computer control system that continuously monitors the state of input devices and controls the state of output devices based on a custom-stored user program. Programmable Logic Controllers Principles And Applications