So I just got my results back and I finally passed my PLC certification exam on the third attempt. Honestly, I'm still in shock. The first two times I went in thinking I knew enough from my day job as an electrician, and both times I walked out feeling like I'd been hit by a truck. The ladder logic questions alone destroyed me.
What actually made the difference this time was being way more systematic about it. I spent about six weeks using a structured PLC study guide instead of just skimming YouTube videos, and I started running through a PLC practice test every single evening for the last two weeks. Timed myself strictly — 90 minutes, no pauses. My scores went from like 58% to consistently hitting 74–78% before I sat for the real thing.
The areas that tripped me up most were data handling, timer/counter instructions, and troubleshooting I/O faults. If anyone else is grinding through this, happy to share more specific exam tips that helped me. What topics are you all finding hardest?