OpenPLC: An Open Source Alternative to Automation

Project description

I. INTRODUCTION In early 60s, industrial automation was usually composed of electromechanical parts like relays, cam timers and drum sequencers. They were interconnected in electrical circuits to perform the logical control of a machine. To change a machine logic was to make an intervention on its electrical circuit, which was a long and complicated process. In 1968, the Hydra-Matic of General Motors requested proposals for an electronic replacement for hard-wired relay systems. The winning proposal came from Bedford Associates with their 084 project. The 084 was a digital controller made to…