PLC Programming
PLC Programming involves creating instructions for specialized industrial computers (PLCs) that control manufacturing equipment and automated processes. Think of it like creating a detailed recipe that tells machines exactly what to do in a factory. These programs help run assembly lines, control robotic equipment, and manage industrial processes automatically. PLC stands for Programmable Logic Controller, which is basically a rugged computer designed to work reliably in harsh factory environments. Similar terms you might see include Industrial Automation Programming or Machine Control Programming.
Examples in Resumes
Developed PLC Programming solutions for automotive assembly line, improving production efficiency by 25%
Created and maintained PLC control systems for food packaging equipment
Led team of 3 technicians in implementing PLC Program updates across 5 production lines
Typical job title: "PLC Programmers"
Also try searching for:
Where to Find PLC Programmers
Online Communities
Professional Networks
Industry Events
Example Interview Questions
Senior Level Questions
Q: How would you approach troubleshooting a complex automation system that has stopped working?
Expected Answer: A senior candidate should explain a systematic approach: checking error logs, using diagnostic tools, isolating the problem area, and having a methodical process to identify and fix issues while minimizing production downtime.
Q: How do you ensure safety in PLC programs?
Expected Answer: Should discuss implementation of safety interlocks, emergency stops, proper testing procedures, and following industry safety standards, explaining these in terms of protecting both equipment and personnel.
Mid Level Questions
Q: Can you explain how you would set up communication between different control systems?
Expected Answer: Should be able to explain basic networking concepts and how different machines or systems can share information, using examples from their experience.
Q: How do you document your PLC programs?
Expected Answer: Should discuss the importance of clear documentation, including comments in code, maintaining updated diagrams, and keeping records of changes for future maintenance.
Junior Level Questions
Q: What is a PLC and what are its basic components?
Expected Answer: Should be able to explain that a PLC is an industrial computer that controls machinery, and describe basic parts like inputs, outputs, and the main processor in simple terms.
Q: Can you explain what a basic PLC program looks like?
Expected Answer: Should be able to describe simple concepts like input/output relationships, basic logic operations, and timers in straightforward terms.
Experience Level Indicators
Junior (0-2 years)
- Basic PLC programming concepts
- Understanding of safety systems
- Reading electrical diagrams
- Basic troubleshooting
Mid (2-5 years)
- Multiple PLC platforms experience
- Complex system programming
- Network communication setup
- Project implementation
Senior (5+ years)
- System architecture design
- Team leadership
- Advanced troubleshooting
- Project management
Red Flags to Watch For
- No hands-on experience with actual PLC hardware
- Lack of understanding about industrial safety protocols
- No experience with any major PLC brands (like Allen-Bradley, Siemens)
- Unable to read basic electrical diagrams
