Electrical-to-logic diagnosis
Follow a symptom from field input and address mapping through the PLC scan to the output and physical machine response.
Multi-craft controls coverage
From electrical symptoms to PLC root cause
The library concentrates on the controls layer of industrial maintenance: reading I/O, tracing ladder state, proving permissives, identifying timing and scan-order faults, and recovering equipment safely.
Motors and drives
Practise seal-in circuits, reversing interlocks, star-delta timing, VFD speed control and safe drive-fault reset.
Safety and permissives
Work with E-stop reset, two-hand control, light-curtain muting, guard and process permissives without touching live machinery.
Process utilities
Troubleshoot alternating pumps, level alarms, dosing, valves, temperature and other common plant utility patterns.
Scenario library
A controls-maintenance library, not a slideshow course.
Intermittent Double-Start Fault
Diagnose an edge-dependent intermittent failure that appears only under a specific operating sequence.
intermittentedge casediagnosis
Open scenario Motor Start / Stop
Build and verify a latched motor circuit with E-stop, overload and auxiliary feedback.
motoroverload
Open scenario VFD Safe Fault Reset
Detect a drive trip and allow reset only after a deliberate safe recovery sequence.
VFDrecovery
Open scenario Wrong I/O Address
Trace a healthy field signal mapped to the wrong PLC address and correct the logic fault.
I/Oaddressing
Open scenario Stuck Level Input
Separate a frozen process signal from a logic error using live state and controlled tests.
sensorstuck input
Open scenario Light Curtain Mute Logic
Commission and recover a safety muting sequence with timing and reset constraints.
safetymuting
Open scenario Training outcomes
Evidence beyond course completion
Assignments can grade normal operation, unsafe demands, boundary conditions and recovery behavior against the same machine model.
- Trace faults across field I/O, ladder state and machine response
- Demonstrate safe motor and VFD recovery
- Identify timing, counter and scan-order defects
- Produce scenario-level evidence for maintenance skills matrices
Scope, stated plainly
The platform covers PLC, electrical-control and automation-maintenance practice. It does not teach mechanical drives, bearings, hydraulics, pneumatics, welding, HVAC service or statutory lockout procedures as complete disciplines, so it should complement—not replace—a multi-craft maintenance curriculum.
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Turn recurring controls faults into repeatable maintenance drills
Use the existing labs immediately, then map assignments and pass criteria to the equipment, failure modes and competencies your team owns.