Ladder Logic Basics


The terms software and firmware both refer to digitally stored programs and data structures that are read and written by computers. In the PLC world, software is usually reserved for computer applications that allow the logical creation, monitoring, and troubleshooting of a PLC program. One example of PLC software is the RSLogix program developed by [...]

Ladder Logic Basics2014-09-16T08:48:41-04:00

The Basics of PLC Operation


The operation of a PLC is very simple. The processor makes decisions based on a ladder logic program written by the user. In order to use the program properly, the PLC must communicate with the various field devices it is tasked with monitoring and controlling. It then compares the actual conditions of the field devices [...]

The Basics of PLC Operation2014-09-09T12:52:51-04:00

Valve Actuator Fundamentals


A single facility can have hundreds, if not thousands, of valves to control everything from turbine operation to ventilation, to systems that ensure the safety of personnel and equipment. The valves used can range in size from less than an inch to several feet in diameter. While some of these valves are designed to be [...]

Valve Actuator Fundamentals2014-09-10T15:03:43-04:00

Programmable Logic Controllers


Programmable logic controllers, or PLCs, are used to automate processes in industry. In the 1960s, the computerized processor replaced the relay logic control system. With the widespread use of PLCs in today’s […]

Programmable Logic Controllers2014-09-10T15:27:51-04:00
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