The international standard IEC 61131-3 defines the five most common PLC programming languages, which are split into two categories: graphical and textual. Graphical Languages: Ladder Logic (LD): The most popular language, it visually mimics electrical relay logic circuits, making it intuitive for electricians and technicians. It’s excellent for discrete control...
Digital vs. Analog I/O: Key Differences in PLC Systems In the world of industrial automation, Programmable Logic Controllers (PLCs) are the brains of the operation. They control everything from simple machine sequences to complex manufacturing processes. But for a PLC to control anything, it needs to interact with the real...
In today’s fast-paced industrial world, automation is king. 👑 At the heart of modern industrial automation lies a robust and reliable device: the Programmable Logic Controller (PLC). From massive automotive assembly lines to the local car wash, PLCs are the unseen brains making everything happen. But what exactly is inside...
What is a PLC? A Simple Explanation for Beginners Have you ever wondered how a car is assembled with perfect precision, a beverage is bottled and capped in seconds, or an elevator knows exactly which floor to go to? The unsung hero behind these and countless other automated tasks is...
Top 30 PLC Basics Interview Questions and Answers Top 30 PLC Basics Interview Questions and Answers I. Fundamental Concepts 1. What is a PLC? A PLC, or Programmable Logic Controller, is a ruggedized industrial computer used to automate specific processes, machine functions, or even entire production lines. It continuously monitors...
Purdue Model for ICS Cyber Security: 30 Interview Questions & Answers Purdue Model for ICS Cyber Security 30 Comprehensive Interview Questions & Answers Part 1: Fundamental Concepts Part 2: Security Principles & Implementation Part 3: Advanced & Scenario-Based Questions © 2025 Instrunexus. All Rights Reserved...
DCS Architecture & Fundamentals  Q: What is the fundamental difference between a DCS and a PLC? A: The core difference is architectural. A PLC (Programmable Logic Controller) is a centralized, standalone controller optimized for high-speed discrete logic and machine control. A DCS (Distributed Control System) is a process-oriented system...
Top 50 Advanced DCS Interview Questions and Answers Top 50 Advanced DCS Interview Q&A For Experienced Control System Engineers...
Top 10 Thermocouple Troubleshooting Tips for Field Engineers Thermocouples are the workhorses of temperature measurement in countless industrial applications. From massive furnaces to sensitive chemical reactors, these simple, robust sensors provide critical data for process control and safety. However, when a temperature reading goes awry, the humble thermocouple is often...