Engineering the logic
behind motion.
Practical PLC, automation, vision integration, sequencing, interlocks and analog-control notes. The reasoning and test conditions matter as much as the final ladder.
Practical controls guides
One search problem per article. Device addresses, module details and signal polarity must still be verified before machine deployment.
PLC SET/RESET Logic: Why Stop Priority Matters
How scan order, latching and reset conditions affect a machine Run state.
Read →ANALOGHow to Scale a 4–20mA Load Cell Signal in a PLC
Scale 0–4000 raw counts to 0.0–500.0 kg and understand quantization/noise.
Read →PLC BASICSWhy PLC One-Shot Logic Needs a PLS Pulse
Why ADD can repeat every scan and how a one-scan pulse fixes it.
Read →Lab Case P-001 — Continuous Dosing Machine
A training design case covering 4–20mA load-cell scaling, Auto/Manual logic, VFD Run and refill hysteresis.
Published as a training lab case, not as a commissioned client project.
Open case →MACHCTRL
PLC Programming · Automation · Control Systems. A growing library of practical controls notes and design reasoning.