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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Commissioning

Cold and Hot Loop Checking in Automation: Key Differences and Step-by-Step Procedures

Table of ContentsWhat is a Control Loop?What is Loop Checking?Understanding Control Loop Commissioning with...
Instrumentation Calculators

Gas Flow Unit Conversion Calculator: Cubic Meters per Hour (m³/h) to Standard Cubic Feet per Minute (SCFM)

Equipment sizing, system calibration, data reporting, and compliance depend on unit conversion between metric...
Documentation

82 Essential Drawings and Documents for Instrumentation and Control Engineers

Table of ContentsProject Engineering Stage (Design & Construction Phase)Automation Stage (DCS/PLC/SCADA Configuration)Maintenance & Commissioning...
PLC

Scaling Analog Values in Industrial Automation (PLC)

Table of ContentsKey Definitions -Scaling Analog ValuesWhat is Analog Signal Scaling?Why is Analog Scaling...
Instrumentation Calculators

Gas Flow Unit Conversion Calculator: Liters per Second (L/s) to Standard Cubic Feet per Minute (SCFM)

Accurate unit conversion is crucial in process industries, HVAC systems, and gas flow monitoring...
Instrumentation Questions

Advanced Profinet Protocol Quiz for Automation Engineers

Test your knowledge of Profinet, one of the most potent Ethernet-based communication protocols used...
PLC

Understanding NO vs NC Contacts is key for Logic Writing in PLC Programming

Table of ContentsWhat are NO and NC Contacts?Definition of NO and NC ContactsWhat is...
Engineering

Relief Valve Datasheet in Under 10 Minutes: 7 Must-Know Definitions

Table of ContentsImage 1: Sectional View of a Spring-Loaded Safety Relief ValveHow a Spring-Loaded...
Instrumentation Calculators

PSIA to PSIG Conversion Calculator

Table of ContentsUnderstanding PSIA (Pounds per Square Inch Absolute)Understanding PSIG (Pounds per Square Inch...
Automation

Understanding Differences of SIS, PLC, and BPCS in Industrial Automation

Table of ContentsWhat are SIS, PLC, and BPCS?What is SIS (Safety Instrumented System)?What is...
Instrumentation Calculators

Mass Flow Unit Conversion: Pounds per Hour (lb/h) to Kilograms per Hour (kg/h)

Engineers, plant operators, and technical professionals can use this Flow Unit Conversion Calculator to...
Instrumentation Questions

Top 25 MCQs on Turbine Supervisory Instrumentation (TSI) for Instrumentation Professionals

Monitoring and safeguarding rotating machinery like steam and gas turbines in process sectors depends...
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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...
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...