Top 13 Automation Engineer Interview Questions & Answers (Part 2 of 2)

Summary

This video provides insights into key automation job interview questions, covering topics like programming languages, control systems, and sensors. It explains concepts such as PID control, PLC vs DCS, and the role of transmitters in automation. The video also explores common interview questions, like handling diverse teams and leading projects. Viewers are encouraged to like, subscribe, and download the Real Pars app for more in-depth training. Whether you're preparing for an automation job or seeking further knowledge, this video is designed to help you excel in your interview and career.

Takeaways

• 😀 The video discusses common job interview questions for automation-related roles, focusing on automation job types and their associated skills.
• 😀 It introduces different programming languages used in industrial automation, such as Structured Text, Ladder Diagram, Function Block, and Sequential Function Chart.
• 😀 The video explains PID (Proportional-Integral-Derivative) control systems, which are essential in closed-loop automation processes.
• 😀 A key distinction is made between PLCs (Programmable Logic Controllers) and DCS (Distributed Control Systems), highlighting their roles and differences in automation.
• 😀 The role of encoders in automation is clarified, describing them as rotary devices that output digital pulses to measure angular motion.
• 😀 Various components used in automation are outlined, including sensors, transmitters, control systems, and actuators.
• 😀 Leading PLC providers like Rockwell Automation, Siemens, and Schneider are mentioned, along with leading DCS providers such as Yokogawa and Honeywell.
• 😀 SCADA (Supervisory Control and Data Acquisition) software companies like Aviva Wonderware and Siemens WinCC are introduced.
• 😀 The video also discusses the advantages of using 4-20 milliamp signals over 0-10 volt signals in automation systems, particularly for long-distance transmission and fault detection.
• 😀 The differences between 2-wire, 3-wire, and 4-wire transmitters are explained, emphasizing the configurations for power and signal transmission in automation systems.

Q & A

What are the five IEC 61131 programming languages used in automation?

The five IEC 61131 programming languages are: Structured Text, Ladder Diagram, Function Block, Sequential Function Chart, and Instruction List.

Can you explain the concept of PID (Proportional Integral Derivative) control?

PID is a widely used closed-loop control system. It maintains the output to a device so that there is zero error between the process variable input and the setpoint.

What is the difference between a PLC and a DCS?

A PLC (Programmable Logic Controller) is a ruggedized computer used for automating processes. A DCS (Distributed Control System) is similar to a PLC but contains multiple autonomous controllers distributed throughout a system.

What is an encoder in the context of automation?

An encoder is a rotary device that outputs digital pulses representing angular motion. It typically consists of a wheel with alternating clear stripes detected by optical sensors to produce digital outputs.

What are the different components used in automation systems?

Components of automation systems include sensors (for temperature, pressure, flow, level), transmitters (for sending raw signals), control systems (like PLCs, DCSs, and PID controllers), and output devices/actuators such as drives and control valves.

Who are some of the leading PLC providers?

Leading PLC providers include Rockwell Automation (Allen Bradley), Siemens, Schneider Electric (Modicon), and GE Fanuc.

Who are some of the leading DCS providers?

Leading DCS providers include Yokogawa, Honeywell, Fisher Rosemount, ABB, and Foxboro.

What are the leading SCADA software companies?

Leading SCADA software companies include Aviva Wonderware, GE Simplicity, GE iFix, Siemens WinCC, Inductive Automation Ignition, Rockwell Software FactoryTalk View, and Ikonics Genesis 64.

Why is the 4-20 milliamp signal preferred over a 0-10 volt signal?

The 4-20 milliamp signal is preferred because it can travel longer distances without losing signal strength. If the signal drops below 4 milliamps, it can indicate a fault or open wire, whereas a 0-10 volt signal weakens over long distances due to resistance.

What is the difference between 2-wire, 3-wire, and 4-wire transmitters?

A 2-wire transmitter uses the same cable for both power and signal transmission. A 3-wire transmitter separates the power and signal, with respect to a common ground. A 4-wire transmitter uses two wires for power and two wires for signals.