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How PLC Reads the Data from Field Transmitters

S Bharadwaj Reddy
Instrumentation and control rely on converting physical or process variables into a more useful format for the operator display. Pressure in a pipe is converted to mechanical deflection of a

PLC Motor Control Ladder Logic Programming

S Bharadwaj Reddy
Now we are discussing about How a PLC Motor Control ?. Before going into the article, let us assume some conditions here. A PLC has to start a Motor when the

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

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

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

PLC System Documentation

S Bharadwaj Reddy
The PLC documentation is a very important engineering record of the process control steps, and, as with all technical descriptions, accurate detailed engineering records are essential. Without accurate drawings, changes

PLC Program for Automatic Mixing Controlling in a Tank

S Bharadwaj Reddy
Automatic Mixing Controlling in a Tank This is PLC Program for automatic mixing controlling in a tank. Problem Description Material A and material B are collected in a tank. These

PLC Program for Control Valve Scaling

S Bharadwaj Reddy
Control Valve Scaling This is PLC Program to implement analog scaling in S7-300 PLC. Problem Description Implement PLC program in S7-300 for analog scaling. Problem Diagram Problem Solution Analog inputs

PLC Program for Water filling and Discharging Process

S Bharadwaj Reddy
Water filling and Discharging Process This is PLC Program for Water filling and discharging process using S7-1200 PLC. Problem Description Many industries or plant, there are lots of manual water

PLC Program for Latching and unlatching Circuit

S Bharadwaj Reddy
PLC Latching and unlatching Circuit This is PLC Program for Latching and unlatched circuit for output. Problem Description In some conveying system operator fills tank manually by operation water pump manually.

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