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PLC

Comparison instructions of PLC

Introduction Comparison instructions in PLC are used to test pairs of values to condition the...
Control Valve

Control valve parameters

  The control valve is the instrument used to control or regulate the flow of...
Automation

Air compressor prime mover control

Compressed air delivery is regulated by control of the compressor drive. This is accomplished...
Electrical

What is a switchboard and what is it used for?

Definition The National Electrical Code® (NEC®) defines a switchboard as a large single panel, frame,...
Level Measurement

Level measurement using hydrostatic pressure measurement

Principle: The basis of hydrostatic pressure measurement for the level is such that the measured...
Pressure Measurement

Vibrating Wire pressure measurement

The Vibrating Wire sensor consists of an electronic oscillator circuit which causes a wire to vibrate...
Electrical

How switches and relays work ?

How switches work and their structure The switches are used to facilitate or interrupt a...
PLC

What is Sequential Function Chart?

Introduction Sequential function graphics (or SFC) are one of the five PLC programming languages defined...
Instrumentation

Functions and features of pneumatic valves

Introduction Pneumatic valves control the path of the compressed air. The direction of flow is...
Automation

Fuzzy control logic – basic, advantage

Fuzzy logic: Fuzzy control logic is all about this relative importance of precision in presence...
Instrumentation

Working of Positive displacement pump used in petroleum reservoir

The positive displacement pump used in reservoirs commonly works in Sucker Rod Pumping mechanism. Sucker rod...
PLC

3 Commonly used Programming languages for PLC

Introduction As PLCs have developed and expanded, programming languages have developed with them. Programming languages...
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