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PLC Problems Troubleshooting

S Bharadwaj Reddy
Troubleshooting PLCs can be started by checking the healthiness status of CPU, I/O Modules, Fuse Blow-out and different PLC Failure reasons including wiring, field transmitters healthiness status or transmitter configuration,

PLC Valve Control Ladder Logic Programming

S Bharadwaj Reddy
Objective : To understand the basic concept of PLC Valve Control Ladder Logic. Target Users : Students, Technicians, Freshers, Trainee engineers. Note : Barrier or Relay not shown in above

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

What is Ladder Diagram Programming ?

S Bharadwaj Reddy
Ladder Diagram (LD) Programming The most common language used to program PLCs is Ladder Diagram (LD), also known as Relay Ladder Logic (RLL). This is a graphical language showing the

PLC Memory Mapping and I/O addressing

S Bharadwaj Reddy
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

Heating and Mixing of Products using PLC Example Tutorial

S Bharadwaj Reddy
Heating and Mixing of Products This is PLC Program for automatic heating and mixing of products. Problem Description Make an automatic system in which two materials are collected in one

PLC Program for Continuous Filling Operation

S Bharadwaj Reddy
PLC Program : A Continuous Filling Operation requires boxes moving on a conveyor to be automatically positioned and filled. PLC Program for Continuous Filling Operation Purpose : Solenoid : To

PLC Analog I/O Potential Problems

S Bharadwaj Reddy
Analog I/O is generally handled internally to the PLC as register values. For most PLCs the values can be mathematically manipulated using software math operations. PLC Analog I/O Potential Problems

PLC Ladder Logic Example

S Bharadwaj Reddy
This topic is a continuous to Relays in Ladder Logic Article. Click here to Read the Previous Article. Here, we will emulate the exact same high-pressure alarm circuit using an

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