EDN

Reference Design: Introduction to PLCs (Programmable Logic Controllers)

This tutorial offers an in-depth introduction into programmable logic controllers (PLCs). The article starts with an overview of the history and the role PLCs in factory automation. The basic ...
Hackaday

CPLD Tutorial: Learn Programmable Logic The Easy Way

The guys over at hackshed have been busy. [Carl] is making programmable logic design easy with an 8 part CPLD tutorial. (March 2018: Link dead. Try the Wayback Machine.) Programmable logic devices are ...
Machine Design

Programmable Controllers

A programmable logic controller, or PLC, is a software-based equivalent of a relay panel. A PLC is a general-purpose device. One model can be programmed to control a variety of machines, and programs ...
EDN

Programmable Logic Controller Block Diagram

are process and control implementations that cover everything from test labs and fabrication plants to military and medical electronics to basic data acquisition. They leverage various sensor types ...