PLC Ladder Logic

PLCs (programmable logic controllers) are specialized, robust industrial computers. They are designed to continuously control equipment and processes based on process inputs and logical control programming. One of the most common ways to program this type of computer is a technique called ladder logic. This is a technique that provides a visual representation of the logic flow which helps with both initial programming and subsequent troubleshooting. This course discusses the background of ladder logic as well as basic instruction types such as examine if closed and examine if opened. This course also illustrates several varying ladder logic examples such as a lamp, motor starter, and garage door.