plc examples with ladder logic Archives

Contacts and Coils in PLC Ladder Logic

S Bharadwaj ReddyDecember 13, 2018December 13, 2018

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...

History of Programmable Logic Controllers (PLC)

S Bharadwaj ReddyDecember 13, 2018May 8, 2019

Every control system may be divided into three general sections: input devices (sensors), controllers, and output devices (actuators). The input devices sense what is happening in the process, the controller...

PLC Memory Mapping and I/O addressing

S Bharadwaj ReddyDecember 12, 2018May 7, 2019

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...

PLC Analog I/O and Network I/O

S Bharadwaj ReddyDecember 12, 2018December 12, 2018

In the early days of programmable logic controllers, processor speed and memory were too limited to support anything but discrete (on/off) control functions. Consequently, the only I/O capability found on...

Oil and Water Separation Process using PLC Programming

S Bharadwaj ReddySeptember 10, 2018May 27, 2019

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

S Bharadwaj ReddySeptember 7, 2018March 21, 2019

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

S Bharadwaj ReddyAugust 20, 2018September 5, 2019

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 ReddyAugust 19, 2018March 21, 2019

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

S Bharadwaj ReddyAugust 9, 2018August 10, 2019

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

S Bharadwaj ReddyJuly 17, 2018May 12, 2020

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...

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