Mis-conceptions of PLC Ladder Logic
Perhaps the most important yet elusive concept to grasp when learning to program PLCs is the relationship between the electrical status of the PLC’s I/O points and the status of...
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Contacts and Coils in PLC Ladder Logic
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...
PLC Memory Mapping and I/O addressing
A wise PLC programmer once told me that the first thing any aspiring programmer should learn about the PLC they intend to program is how the digital memory of that...
Oil and Water Separation Process using PLC Programming
Oil and Water Separation Process This is PLC Program for automatic water separation process. Problem Description Implement oil and water separation process in PLC using ladder diagram programming language. Problem...
T Flip Flop PLC Ladder Diagram
T Flip Flop Logic using PLC This is PLC Program to implement T flip flop. Problem Description Implement T flip flop in PLC using ladder diagram programming language. Problem Diagram...
Motor Speed Control using VFD and PLC Programming
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
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...
PLC Program to Drain Same Products from Two Tanks
Drain Same Products from Two Tanks This is PLC Program to drain same products from two tanks. Problem Description Two tanks are filled with same products. Draining materials from these...
PLC Program for Alarm Security System
Alarm Security System This is PLC Program for Alarm Security System. Problem Description Make burglar alarm system program in S7-1200 PLC for the house. Consider one house, in this we...
PLC Program for Alternate Output Circuit with Latched Function
Alternate Output Circuit This is PLC Program for an Alternate output circuit (with latched function). Problem Description Setting the light ON by pressing a SWITCH on 1st time, 3rd time,...