PLC Interview Questions: Top 10 Questions & What Interviewers Really Expect | Controls Engineer

Join this channel to get access to perks:    / @electricalandautomation_guru   Preparing for a PLC or Controls Engineer interview? ⚡ In this video, we break down the *Top 10 PLC & Controls Interview Questions* and, more importantly, explain what the interviewer is actually trying to evaluate with each question. An interviewer asking you to define Ladder Logic is not simply looking for a textbook definition—they want to know whether you understand industrial control systems well enough to work safely and confidently with live equipment. In this video, you will learn how to answer important *PLC interview questions* related to: 🔹 What are the 5 PLC programming languages defined under IEC 61131-3? 🔹 Why is Ladder Logic still widely used in industrial plants? 🔹 Ladder Logic vs Structured Text (ST) 🔹 PLC Scan Cycle and Scan Order 🔹 Why outputs may operate at the wrong time because of scan sequence 🔹 PLC, HMI, VFD/Drive & Industrial Ethernet documentation 🔹 IP Address, Subnet Mask, Gateway, MAC Address & Port Assignments 🔹 Ethernet/IP vs Modbus TCP 🔹 Sinking vs Sourcing in PLC I/O 🔹 Why 4-20 mA is preferred over 0-10 V in many industrial applications 🔹 Broken-wire/fault detection using 4-20 mA 🔹 A practical PLC troubleshooting methodology 🔹 Troubleshooting from operator feedback and alarms to field devices 🔹 How to answer “Tell me about a time something went wrong” using the STAR method 🔹 The important interview question: “Do you have any questions for us?” 💡 The goal is not just to memorize answers. You should understand *what the interviewer is really measuring behind each question* and learn how to explain your technical knowledge like a real Controls/Automation Engineer. If you are preparing for a career in **PLC Programming, Industrial Automation, Control Systems, SCADA, HMI, VFD, DCS or Controls Engineering**, this video can help you prepare more effectively for your next technical interview. 📌 Watch till the end and make sure you are ready for these commonly asked PLC interview questions. 👍 Like the video if you found it useful. 🔔 Subscribe for more *PLC, DCS, Industrial Automation & Controls Engineering* content. #PLCInterview #PLCProgramming #IndustrialAutomation #ControlsEngineer #AutomationEngineer #LadderLogic #PLCTroubleshooting #IEC611313 #ControlSystems #PLCQuestions