Programmable Logic Controllers (PLC) are often defined as miniature industrial computers that contain hardware and software used to perform control functions.

This manual describes the concepts behind programming PLC-3 family processors. Included in this manual is detailed information on how the PLC-3 programming instructions work.

Simplified Illustration of PLC Function in a SCADA System tographs of open SCADA PLC panels. The PLCs in the first photo appear in the center of the panel, while the PLCs in the second …

The PLC Technician’s Handbook was developed to be a compact collection of fundamental content for practicing automation and PLC technicians to reference through their career.

A PLC (Programmable Logic Controller) is an industrial computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, …

Most real programmable logic control systems are a combination of continuous and discrete sensors and actuators. Actuators produce Finite quantities (batch) of materials . The input …

Electrical continuity in an input circuit, occurs when there is a complete path for current to flow. When there is electrical continuity, a bit in the PLCs memory (sometimes called the input …