DCS Archives - Instrumentation Tools

PLC Connection between Instrument, Junction Box, Marshalling & System Cabinet

S Bharadwaj ReddyJanuary 3, 2019January 3, 2019

A PLC connection represents the signal flow starting from the field transmitters, junction box, marshalling cabinet, system cabinet and Human-Machine Interface for the operator graphic display. PLC Connection between Instrument,

PLC Digital Signals Wiring Techniques

S Bharadwaj ReddyDecember 16, 2018December 16, 2018

Ina process plant, on/off control is done through the PLC or DCS. The below Figure is an overview of one discrete/digital (on/off) circuit, showing the entire process from the power supply

PLC Analog Signals Wiring Techniques

S Bharadwaj ReddyDecember 16, 2018January 9, 2019

Unlike the discrete/digital (on/off) circuit, analog signals vary across a range of voltage or current. Taking the same vessel described previously in Digital wiring example, how would the wiring change

What is Distributed Control Systems (DCS) ?

S Bharadwaj ReddyJanuary 22, 2018November 24, 2018

A radically new concept appeared in the world of industrial control in the mid-1970’s: the notion of distributed digital control. Direct digital control during that era suﬀered a substantial problem:

How to Troubleshoot a PLC System

S Bharadwaj ReddyOctober 8, 2016December 15, 2018

At this post i will give some basic instructions which are from my personal experience in order to give you a guide for how troubleshooting in automation systems (PLC/DCS) is

PID Controllers with Output High Select Logic

S Bharadwaj ReddyMarch 26, 2016April 14, 2018

The below figure 1 shows a typical control scheme with two controllers driving the same control valve via high select logic. The controller PIC-1 is the main pressure controller and

Overview of Split Range Control

S Bharadwaj ReddyMarch 26, 2016November 28, 2018

A very common control scheme is split range control in which the output of a controller is split to two or more control valves. For example: Controller output 0%

Blast Furnace Panel Modification to Reduce Down Time by 60 to 70%

S Bharadwaj ReddyFebruary 20, 2016October 4, 2017

With the time demand of increasing the efficiency of production facilities to achieve Target, it is required to made the engineering system robust and fool proof .The below described is

Difference between DCS & PLC Systems

S Bharadwaj ReddyDecember 23, 2015December 3, 2018

Difference between DCS & PLC Systems DCS stands for “Distributed Control System” DCS’s were designed to control processes, not discrete operations. As such, a large number of the inputs and

Switch or Transmitter

S Bharadwaj ReddyDecember 23, 2015November 13, 2018

For decades, process instrumentation specifiers have faced the decision whether to use a switch or a continuous transmitter for a given application. Either type of instrument can be used to

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Tag : DCS