PLC Troubleshooting 101 Hardware fault vs. logic error — how do you actually tell the difference? 🔴 Hardware faults: PLC will light up red Software points out the exact fault ⚙️ Logic errors: Much trickier to spot Show up as process failures, not flashing lights Could be wrong instructions, missing decimals, PID mistakes… 💡 Pro tip: If the PLC’s been running for months without issue, it’s probably not the logic. Look at wiring, fuses, relays, or devices first. 📌 Save this for the next time yo