✓ ON THE JOBThe conveyor stops on night shift and the drawing is three revisions old. Start at the output, split the circuit in half and find the open before anyone swaps parts.
Open map 17.03 · Half-Split on a Control Circuit
Maintenance tech, back shift
✓ ON THE JOBA level transmitter reads 0% with a full tank. Clamp the loop, check for 4 mA and decide in two minutes if it is wiring, the transmitter or the scaling.
Open map 04.13 · Measuring Loop Current
Electrician moving into controls
✓ ON THE JOBThe PLC shows the input on but the cylinder never moves. Follow the map from the solenoid back to the valve and the air supply.
Open map 14.14 · Cylinder Will Not Move
Maintenance fitter
✓ ON THE JOBA VFD trips on overvoltage every time the fan slows down. Read the fault, check the decel time and the braking options before calling the supplier.
Open map 10.11 · Braking and DC Bus Overvoltage
Industrial electrician
✓ ON THE JOBThe contactor chatters and the coil gets hot. Check coil voltage, VA and the aux contacts with the meter in the right order.
Open map 17.08 · Bad Coil or Bad Contact?
Qualified electrician, commercial to industrial
✓ ON THE JOBFirst week with ladder logic and the timer bits make no sense. One page shows the TON, its bits and its values on a real rung.
Open map 02.07 · Timer Bits and Values
Apprentice, second year
✓ ON THE JOBA small firm asks for a duplex pump panel that alternates. Use the project page to plan the logic and the I/O before you quote the job.
Open map 19.02 · Duplex Pump Alternator
Electrician taking side jobs
✓ ON THE JOBAn interview question about sinking and sourcing inputs. Review the one-page answer with the wiring drawn, the night before.
Open map 03.03 · Sinking vs Sourcing Inputs
Applying for a controls tech job
✓ ON THE JOBThe conveyor stops on night shift and the drawing is three revisions old. Start at the output, split the circuit in half and find the open before anyone swaps parts.
Open map 17.03 · Half-Split on a Control Circuit
Maintenance tech, back shift
✓ ON THE JOBA level transmitter reads 0% with a full tank. Clamp the loop, check for 4 mA and decide in two minutes if it is wiring, the transmitter or the scaling.
Open map 04.13 · Measuring Loop Current
Electrician moving into controls
✓ ON THE JOBThe PLC shows the input on but the cylinder never moves. Follow the map from the solenoid back to the valve and the air supply.
Open map 14.14 · Cylinder Will Not Move
Maintenance fitter
✓ ON THE JOBA VFD trips on overvoltage every time the fan slows down. Read the fault, check the decel time and the braking options before ringing the supplier.
Open map 10.11 · Braking and DC Bus Overvoltage
Industrial electrician
✓ ON THE JOBThe contactor chatters and the coil gets hot. Check coil voltage, VA and the aux contacts with the meter in the right order.
Open map 17.08 · Bad Coil or Bad Contact?
Qualified electrician, commercial to industrial
✓ ON THE JOBFirst week with ladder logic and the timer bits make no sense. One page shows the TON, its bits and its values on a real rung.
Open map 02.07 · Timer Bits and Values
Apprentice, second year
✓ ON THE JOBA small workshop asks for a duplex pump panel that alternates. Use the project page to plan the logic and the I/O before you quote the job.
Open map 19.02 · Duplex Pump Alternator
Electrician taking on side jobs
✓ ON THE JOBAn interview question about sinking and sourcing inputs. Revise the one-page answer with the wiring drawn, the night before.
Open map 03.03 · Sinking vs Sourcing Inputs
Applying for a controls technician job
PLC From Zero
Ladder Logic Step by Step
Digital I/O
Analogue I/O: 4‑20 mA and 0‑10 V
Industrial Sensors
Process Instrumentation
Reading Electrical Drawings
Contactors, Relays and Overloads
Motor Starting Circuits
Variable Frequency Drives
HMI Basics
SCADA Systems
Industrial Networks
Industrial Pneumatics
Industrial Hydraulics
Industrial Symbols
Fault Finding
Preventive and Predictive Maintenance
Practice Projects
Solved Exercises