When a PLC is used primarily to replace relays, timers, and counters, it's hard to beat the simplicity and usefulness of ladder diagram programming. Their ability to accept programming in ladder ...

The PuffinPLC Project is an effort to produce a Linux-based GNU Public Licensed Programmable Logic Controller (PLC). PLCs were developed in the 1960s to replace the complex electrical relay circuits ...

The circuits successfully performed the sum-of-product operation at 2.8 kHz. The full potential of memristors was demonstrated when the devices were made to actively re-program themselves.

The software also implements PLCtype logic scan capable of submillisecond scan times and intuitive flow chart programming. Phoenix Contact Inc., Box 4100, Harrisburg, PA 17111, (800) 888-7388 ...

Wiring, safety PLC programming critical to machine safety performance. July 11, 2013. Some common pitfalls in machine safety have to do with not wiring devices correctly. Many devices today can cover ...