A Programmable Logic Controller (PLC) is a ruggedized industrial logic controller that can control a specific process, machine function, or even an entire production line for industries, including but not limited to: petroleum, steel, automotive, aerospace, printing, food, textile, medical, corrugating, plastics, etc. PLCs are flexible and adaptable to almost any application.

A PLC functions by collecting knowledge from sensors or input devices, preparing the data collected, and creating outputs based on guidelines pre-programmed within the device. Each PLC is comprised of three main parts: Input, CPU, and Output. Depending on the inputs and outputs, a PLC can:

Start and stop processes automatically
Use Inputs and Outputs for the PLC comparing one machine to interface with different machines.
Precisely time operations and accurately count actions of the machine or items being processed.
Control a variable device (e.g. heater or pump) based on information measured from the Input side of the PLC.
Perform complex math
Receive data information from remote or distant locations and send output management to remote or distant locations.
Generate alarms if a machine malfunctions
Carefully monitor fast methods, lengths, and speeds with special functionality within the PLC.
Communicate with devices (e.g. weighing scales, bar code readers, etc.) to perform tasks such as monitoring and recording run-time data to measure machine productivity or operating temperature