HomeAuthorsPosts by Sundareswaran Iyalunaidu

Sundareswaran Iyalunaidu

With over 24 years of dedicated experience, I am a seasoned professional specializing in the commissioning, maintenance, and installation of Electrical, Instrumentation and Control systems. My expertise extends across a spectrum of industries, including Power stations, Oil and Gas, Aluminium, Utilities, Steel and Continuous process industries. Tweet me @sundareshinfohe
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SIS/ESD

Inhibit vs Bypass in Process Plants: DCS, PLC and ESD/SIS Differences

Table of ContentsWhy Understanding Inhibit vs Bypass in Process Plants MattersWhat Is an Inhibit in Process Automation?What Is a Bypass in Process Automation?What Is Override Control in Process Automation?Inhibit vs Bypass in DCS, PLC and SISHow Inhibit and Bypass Work in Control LogicInhibit and...
Instrumentation Calculators

Advanced Instrument Air Compressor Interlock Logic and Control Quiz for Automation and Instrumentation Professionals

Instrument Air Compressor Interlock Logic Quiz Introduction Instrument air compressors are critical utility equipment controlled through PLC based sequencing, pressure instrumentation, permissives, alarms, trips and automatic standby selection. For automation and instrumentation professionals, understanding this logic is essential for DCS configuration, PLC programming, control panel...
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Communication

CC-Link Industrial Network Protocol: Architecture, Variants, and Applications

Table of ContentsWhat is CC-Link?Origins and Development Timeline - CC-Link ProtocolApplications of CC-Link in...
Control Valve

Control Valve Selection and Recommended Practices for Harsh Process Conditions

Table of ContentsStep 1. Valve Body and Material SelectionStep 2. Trim Material and Cavitation...
Instrumentation Questions

Advanced I/O List Quiz for EPC Instrumentation Engineers – 25 Expert-Level MCQs with Explanations

For instrumentation engineers working on EPC projects, accurately creating an I/O list is absolutely...
Instrumentation Calculators

Rectangular Duct Air Velocity Calculator for HVAC Engineers

The Air Velocity in a Rectangular Duct Calculator is a useful and necessary tool...
Level Measurement

Guided Wave Radar Level Transmitters: Complete Troubleshooting & Maintenance Guide

Table of ContentsProbe Installation and Scarring IssuesFoam and Surface EffectsAntenna (Probe) Contamination and CleaningFlooding,...
DCS

Understanding Permissive Logic and Trip Interlocks in Industrial Systems

Table of ContentsExample of a Permissive ConditionImplementation Platforms for Permissive LogicBehavior of a Permissive...
Calibration

Why Calibration Isn’t the Same as Re-ranging in Process Instrumentation

Table of ContentsWhat is Calibration?What is Re-ranging?Calibration vs. Re-ranging: Key DifferencesPractical Understanding Through a...
Instrumentation Calculators

Gas Flow Unit Conversion Calculator: Standard Cubic Feet per Minute (SCFM) to Standard Liters per Minute (SLPM)

Engineers, technicians, and system designers can use the SCFM to SLPM Conversion Calculator to...
Instrumentation Questions

Top 25 Advanced MCQs on Boiler Control & Interlock Logic for Instrumentation and Control Engineers

This advanced quiz on Boiler Control Systems and Interlocks is for instrumentation and control...
Instrumentation Calculators

SLPM to SCFM Conversion Calculator | Standard Liters per Minute to Standard Cubic Feet per Minute

Table of ContentsWhy Use This SLPM to SCFM Calculator?What is Gas Flow Unit Conversion?Definition:...
Engineering

Top 10 Essential Maintenance Metrics Every Reliability Engineer Must Track

Table of Contents1. Mean Time Between Failure (MTBF)2. Mean Time to Repair (MTTR)3. Failure...
Instrumentation Calculators

Gas Flow Unit Conversion Calculator: Normal Cubic Meters per Hour (Nm³/h) to Normal Liters per Minute (NLPM)

The Nm³/h to NLPM Conversion Calculator is a quick and accurate way to change...
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Latest articles

SIS/ESD

Inhibit vs Bypass in Process Plants: DCS, PLC and ESD/SIS Differences

Table of ContentsWhy Understanding Inhibit vs Bypass in Process Plants MattersWhat Is an Inhibit...
Instrumentation Calculators

Advanced Instrument Air Compressor Interlock Logic and Control Quiz for Automation and Instrumentation Professionals

Instrument Air Compressor Interlock Logic Quiz Introduction Instrument air compressors are critical utility equipment controlled...
Procedures

Galvanic Isolator Troubleshooting Procedure in an Analog Input Loop

Table of ContentsIntroduction to Galvanic Isolator TroubleshootingUnderstanding a Typical 4 to 20 mA Analog...
Instrumentation Calculators

Pressure Transmitter Overrange Protection Calculator: Calculate Pressure Surge and Overpressure Risk

Table of ContentsWhat Is Pressure Transmitter Overrange Protection?Pressure Transmitter Overrange Protection Calculator ParametersHow to...