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Contacts and Coils in PLC Ladder Logic

S Bharadwaj Reddy
The most elementary objects in Ladder Diagram programming are contacts and coils, intended to mimic the contacts and coils of electromechanical relays. Contacts and coils are discrete programming elements, dealing

Basics of PLC Programming

S Bharadwaj Reddy
In the late 1960’s an American company named Bedford Associates released a computing device they called the MODICON. As an acronym, it meant Modular Digital Controller, and later became the

Motor Speed Control using VFD and PLC Programming

S Bharadwaj Reddy
This is PLC Program to control motor speed using VFD drive. Motor Speed Control A VFD drive controls the motor speed. The VFD can be controlled remotely by using PLC/DCS

PLC Program for Food Processing Industry

S Bharadwaj Reddy
PLC Program Food Processing Industry This is PLC Program to detect burned chips and remove them by using PLC. Problem Description Potato chips are made in company and send to

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