PERSONAL TRAINING ENVIRONMENT

Build commissioning judgment by proving the circuit.

Step 5 unifies the cabinet, schematic, controls, faults, and meter into one live circuit model where every action propagates downstream.

BUILD STEP 5 Unified Circuit Engine

Safety100

Technical0

Scenarios Solved0 / 6

Readiness35%

STEP 3 CHALLENGE

Diagnose a hidden fault without guessing

Ready

A fault is selected at random. Use the cabinet, schematic, meter, and evidence log to prove the boundary before submitting a diagnosis.

100 session score 0 hidden faults solved — best score

CURRENT BUILD

Step 1: Prove control power

Not started

Complete the guided sequence, make the required meter readings, and document what each reading proves.

0% complete

Prepare the meter and work area
Prove the meter on a known live source
Test the circuit under investigation
Re-prove the meter on the known live source
Document the fault boundary

SIMULATOR ROADMAP

Build sequence

1

Control-power foundationGuided lesson, safe meter workflow, measurement history

2

Interactive schematic tracingWire paths, terminal-to-terminal highlighting, command and feedback

3

Advanced fault engineRandomized faults, hidden states, better scoring

4

Live tap-to-probe troubleshootingIntegrated meter, physical test points, automatic reference coaching

5

Unified live circuit engineOperable components, propagated states, shared meter and fault logic

6

Mission-critical systemsATS, generator, UPS, switchgear, EPMS/BMS, IST

GUIDED COMMISSIONING LESSON

Step 1 — Prove the control-power path

Scenario: the PLC and I/O modules are dark even though incoming control power is reported available.

Not started

STAGE 1 OF 5

Prepare before measuring

This simulator uses a simplified 120 VAC control circuit and 24 VDC PLC circuit. In the field, follow the approved energized-work, PPE, LOTO, and test-instrument procedures for the equipment and site.

Meter condition and display checked Test leads and probe insulation checked Instrument rating verified for the task Leads placed in COM and voltage input jacks Site procedure, boundaries, and PPE acknowledged

Commissioning habit

Before touching the circuit, state the expected voltage, the correct reference, and what the reading will prove.

STAGE 2 OF 5

Prove the meter on a known live source

Use AC Volts. Place the black lead on AC Neutral and the red lead on the Incoming AC Control Line. A normal simulator reading is approximately 120 VAC.

Required measurement AC Neutral → Incoming AC Control Line Function: AC Volts · Expected: approximately 120 VAC

Required reading not yet captured.

STAGE 3 OF 5

Move through the circuit and find the boundary

Start at the source and move toward the load. The last point with expected voltage and the first point without it define the fault boundary.

→ → → →

Reading AAC Neutral → F1 Line SideExpected: approximately 120 VAC

Reading BAC Neutral → F1 Load SideFault condition: 0 VAC

Capture both required readings.

STAGE 4 OF 5

Re-prove the meter

Return to the known live source and repeat the same AC reading. This confirms the meter and leads still respond after the circuit test.

Required measurement AC Neutral → Incoming AC Control Line Function: AC Volts · Expected: approximately 120 VAC

Required reading not yet captured.

STAGE 5 OF 5

Document the proven fault boundary

Write the exact test points, measured values, expected values, operating condition, and conclusion.

Commissioning note

INTERACTIVE SCHEMATIC TRACING

Step 2 — Trace the circuit path

Follow each path in order and prove how control power, command, output, and feedback move through the simulator.

Not started

TRACE MODE

Control power path

Trace the incoming control-power source to the PLC power input.

0% complete · 0 / 4 paths complete

CLICK NODES IN ORDER

CHECKPOINTS

Required path order

0 / 5

Why this matters

Separates power, command, output, and feedback paths
Teaches you when the reference changes from AC neutral to DC common
Reinforces the boundary between PLC logic and field control voltage
Builds the habit of tracing before guessing the failed device

UNIFIED LIVE CIRCUIT MODEL

Step 5 — Operate the circuit and watch it propagate

Open a breaker, remove a fuse, issue a PLC command, or inject a fault. The same calculated state drives the diagram, cabinet indicators, test points, meter readings, and evidence.

Normal

ENERGIZED PATH VIEW

Live control circuit

Waiting

AC CONTROL POWER

24 VDC CONVERSION & COMMAND

RELAY & FIELD OUTPUT

BREAKER FEEDBACK

HMIBREAKER OPEN

OPERATE / FAULT THE CIRCUIT

Component controls

Toggle a component and watch all downstream states and meter values change immediately.

Meter workflow

Select BLACK or RED in the meter dock, then tap any TP node above. The full Meter Lab and troubleshooting meter use the same probe positions.

CALCULATED STATE

What the circuit is doing

F1 load0 VAC

DC bus0 VDC

PLCDARK

R1 relayINACTIVE

XMS20 VAC

BreakerOPEN

Feedback0 VDC

HMIOPEN

EVENT LOG

Operations and propagation

No circuit operations recorded.

VISUAL CABINET

Cabinet Explorer

VIRTUAL DIGITAL MULTIMETER

Meter Lab

Cabinet Energized

Function Black Lead Red Lead Cabinet State Energized

I completed the safety setup for this training session

— — —VAC

BLACK

RED

MEASUREMENT HISTORY

Session readings

#	Function	Black lead	Red lead	Reading	Usefulness
No readings recorded.

RANDOMIZED FAULT ENGINE

Step 4 — Live Troubleshooting Bench

The root cause is hidden. Place the black and red probes directly on cabinet test points, adjust the meter, and prove the boundary without leaving this page.

Ready

Session score100

Elapsed00:00

Measurements0 / 12

Hints0

WORK ORDER

No active hidden fault

Tap Start Random Fault to begin.

Expected operation: —

Incoming AC—

PLC RUN—

Close DO—

R1 relay—

XMS2 output—

Closed feedback—

LIVE TAP-TO-PROBE METER

Measure directly while troubleshooting

Choose the active lead, then tap a test point. Keep the black lead on the proper reference and move the red lead down the circuit.

Tap black lead

Cabinet test-point map AC points reference AC Neutral. DC points reference 24 VDC Common.

AC CONTROL POWER

24 VDC POWER & PLC

COMMAND / RELAY COIL

FIELD OUTPUT

FEEDBACK INPUTS

FINAL SUBMITTAL

Root-cause diagnosis

No attempts

I verified the simulated meter setup, reference, and task conditions Select root cause

Proved source/control power Separated command, output, and feedback Found last known good and first failed point Added specific evidence

Recommended corrective action

SESSION REVIEW

Challenge measurements

0 useful

No challenge readings recorded.

FIELD DOCUMENTATION

Evidence Log

0 points

Observation

No evidence recorded.

AFTER-ACTION REVIEW

Instructor Debrief

Safety100

Useful Measurements0 / 0

Evidence0

Diagnosis—

Instructor notes

Complete a scenario to receive feedback.

Build commissioning judgment by proving the circuit.

Diagnose a hidden fault without guessing

Step 1: Prove control power

Build sequence

Step 1 — Prove the control-power path

Prepare before measuring

Prove the meter on a known live source

Move through the circuit and find the boundary

Re-prove the meter

Document the proven fault boundary

Step 2 — Trace the circuit path

Control power path

Required path order

Why this matters

Step 5 — Operate the circuit and watch it propagate

Live control circuit

What the circuit is doing

Operations and propagation

Cabinet Explorer

Meter Lab

Session readings

Step 4 — Live Troubleshooting Bench

No active hidden fault

Measure directly while troubleshooting

Root-cause diagnosis

Challenge measurements

Evidence Log

Instructor Debrief

Instructor notes

Preferred diagnostic path