Motor control
See the contactor fault, shutdown, supply isolation and realistic lockout/tagout before the motor-terminal inspection.
CONTROLS EXPLAINED · SEASON 3
Find the fault.
Follow the evidence.
A command is on. A machine is stopped. What happens between them? Follow the circuit through twelve short troubleshooting lessons.
12 visual lessonsAbout a minute eachFree to watch
ONE SYMPTOM. A CLOSER LOOK.
Choose a lesson.
12 lessons
Motor control
Follow the Start circuit and see how a failed auxiliary holding contact interrupts coil current.
Motor control
Follow the overload contact, contactor coil and motor through a protective trip.
Electrical faults
See why a high-resistance connection behaves differently when the circuit is under load.
PLC & sensors
Inspect the target, sensing face and mounting distance before blaming the wiring or PLC input.
Electrical faults
Trace the separately supplied controller and the open fuse in the output's field supply.
PLC & sensors
Compare the transmitter signal, analog input configuration and HMI scaling.
PLC & sensors
Follow a short input pulse and the program's sampled state in a slowed timing illustration.
Process & motion
Follow a filling station's level condition, missing conveyor-ready signal and inhibited output.
Electrical faults
Trace a welded normally open contact and see why a coil command does not isolate the load.
Process & motion
Follow a VFD, external motor and guarded flywheel through acceleration and an overcurrent trip.
Process & motion
Inspect a mechanical obstruction, cylinder end sensor, valve command and stored-energy controls.
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NOW PUT IT INTO PRACTICE
Read the clues.
Work the problem.
Explore the virtual panel, take measurements and troubleshoot the stopped conveyor in Level 2.
These animations illustrate training concepts. Follow equipment instructions and your workplace’s hazardous-energy-control procedures. Simulation and video lessons supplement practical training and do not authorize electrical work.