Feature: 12-Lesson Curriculum

From button-to-light to PLC professional.

A structured path through the skills every PLC programmer needs — written for people who learn by doing, not by reading PDFs. Every lesson is paired with a live simulator exercise.

First 6 lessons free. No credit card required.

All 12 lessons

Each lesson takes 20–35 minutes and ends with a graded exercise in the live simulator.

1

PLC Fundamentals

Free
~20 min

What a PLC is, what it does, and how it fits into an automation system. Scan cycle, I/O modules, CPU, memory map.

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2

Ladder Logic Basics

Free
~25 min

Contacts, coils, and rungs. How ladder logic maps from a relay circuit. Writing your first motor start/stop program.

Start →
3

Timers & Counters

Free
~25 min

TON, TOF, CTU, CTD. Preset vs accumulator. Using timers to delay motor start and counters to count parts.

Start →
4

Seal-in Rungs

Free
~20 min

How a seal-in (self-latching) rung works. Why order matters. The classic start/stop motor control circuit with latch.

Start →
5

Latching & Unlocking

Hobby+
~25 min

SET/RESET coils vs seal-in rungs. When each is the right choice. Latch coil hazards and how to avoid them.

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6

Sensor Inputs

Hobby+
~30 min

Proximity, photoelectric, and inductive sensors. PNP vs NPN wiring. How sensor type maps to contact type in ladder logic.

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7

Motor Control Circuits

Hobby+
~30 min

Star-delta starter, overload relay, forward/reverse interlocking. Full motor control program from contactors to PLC.

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8

Sequencers

Hobby+
~25 min

Step-based control using integer comparison. Building a 4-step conveyor sequence that pauses and restarts reliably.

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9

Analog I/O Basics

Basic+
~30 min

Scaling raw counts to engineering units. 4–20 mA loop wiring. Reading a pressure sensor and triggering an alarm.

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10

PID Control

Basic+
~35 min

Proportional, integral, and derivative explained. Tuning a PID loop for a temperature controller in the simulator.

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11

Fault Finding

Basic+
~30 min

Systematic fault-finding using scan-cycle highlight, variable table, and cross-reference. Three injected-fault exercises.

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12

Structured Text

Basic+
~35 min

IEC 61131-3 ST syntax. IF/THEN/ELSE, FOR loops, function blocks. Rewriting a ladder program as Structured Text.

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What each lesson includes

Explanation

Plain-language concept explanations written for technicians and engineers — not textbook academics.

Live exercise

Write real ladder logic against a running machine simulation. Automated test cases tell you when you pass.

Scan-cycle walkthrough

Slow down the scan and watch each rung execute step by step. See why your logic works — or why it doesn't.

Start the curriculum today — free.

First 6 lessons free. No credit card required.

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Competency and practice field guide

PLC training curriculum feature: implementation, evidence and troubleshooting

Direct answer

PLC training curriculum feature becomes useful when it connects learner goal, prerequisite knowledge, competency sequence, practice ratio, scenario, assessment, feedback, remediation, accessibility, portfolio evidence and physical transfer with competency statement through lesson, worked example, runnable task, changed case, result, explanation, assessor or self-review and next decision, then proves one learning unit completed with a successful normal case and a changed case explained without copying under normal, boundary, fault and recovery conditions. The objective is a repeatable engineering or learning result, not merely activity inside a page or tool.

This guide is written for self-directed learners, instructors and training managers planning a route from Boolean I/O through timing, sequence, troubleshooting and integrated automation. The intended result is specific: the learner can choose the next competency by prerequisite, complete a runnable task and retain evidence of behavior, diagnosis and transfer boundaries.

an adult learner explaining PLC and machine evidence to an assessor in a vocational automation laboratory while studying sequenced PLC curriculum, practice and mastery evidence
The scene keeps sequenced PLC curriculum, practice and mastery evidence attached to declared conditions, observable results, diagnostic boundaries and evidence another person can reproduce.

System map / 02

Six concepts that control the result

Treat these as connected checkpoints. Each checkpoint has an expected state, an observable state and a boundary to the next part of the system. That structure prevents a software indication from being mistaken for physical proof.

NODE 01observable

Define the operating contract

learner goal, prerequisite knowledge, competency sequence, practice ratio, scenario, assessment, feedback, remediation, accessibility, portfolio evidence and physical transfer. For sequenced PLC curriculum, practice and mastery evidence, record the initial condition, actor, requested change, observable result and stopping condition before selecting a tool or implementation.

NODE 02observable

Map the evidence path

competency statement through lesson, worked example, runnable task, changed case, result, explanation, assessor or self-review and next decision. Separate request, internal state, output or service, physical or user-visible result and independent feedback so each boundary can be inspected.

NODE 03observable

Prove normal operation

one learning unit completed with a successful normal case and a changed case explained without copying. Run more than one cycle from a known state and retain the values, timings or artifacts that demonstrate repeatability.

NODE 04observable

Exercise a boundary case

skipped prerequisite, repeated failure, copied solution, accessibility barrier, long gap, unfamiliar interface, partial completion and retest. Choose minimum, maximum, simultaneous, delayed or restart conditions that reveal assumptions hidden by the happy path.

NODE 05observable

Diagnose a controlled fault

a prerequisite, explanation, practice, task, assessment, feedback, remediation, accessibility or transfer gap. Preserve the first symptom, divide the system at a measurable boundary and change one condition only after predicting the result.

NODE 06observable

Transfer and hand over

portfolio artifacts reviewed and paired with supervised electrical, instrument and target-controller practice. Restore normal state, remove temporary changes, repeat affected checks and document which claims remain limited to the learning environment.

Procedure / 03

A six-step practice and commissioning workflow

Run the steps in order the first time. Later, the same structure becomes a diagnostic loop: define the expected condition, observe the boundary, interpret the difference and choose one proving action.

  1. 01

    Write the acceptance case

    Convert learner goal, prerequisite knowledge, competency sequence, practice ratio, scenario, assessment, feedback, remediation, accessibility, portfolio evidence and physical transfer into initial conditions, one stimulus and observable pass criteria.

    Evidence: Another person can repeat the case without guessing the intended result.

    Avoid: Using page completion or an animation as the acceptance criterion.

  2. 02

    Build the map

    Document competency statement through lesson, worked example, runnable task, changed case, result, explanation, assessor or self-review and next decision and name who owns each state or decision.

    Evidence: Every request and result has a source, destination and useful inspection point.

    Avoid: Using the same value as command, status and independent feedback.

  3. 03

    Run the baseline

    Apply one learning unit completed with a successful normal case and a changed case explained without copying from a clean start and record the expected evidence.

    Evidence: Repeated runs produce the same bounded result.

    Avoid: Changing several parameters before a baseline exists.

  4. 04

    Challenge assumptions

    Test skipped prerequisite, repeated failure, copied solution, accessibility barrier, long gap, unfamiliar interface, partial completion and retest without changing the acceptance contract.

    Evidence: Limits, timing and restart behavior reach defined states.

    Avoid: Testing only one ideal sequence.

  5. 05

    Isolate one failure

    Introduce or analyse a prerequisite, explanation, practice, task, assessment, feedback, remediation, accessibility or transfer gap and locate the first disagreement.

    Evidence: The proving action distinguishes the leading hypotheses.

    Avoid: Resetting, forcing or replacing before evidence is retained.

  6. 06

    Close the evidence loop

    Complete portfolio artifacts reviewed and paired with supervised electrical, instrument and target-controller practice and repeat the affected regression cases.

    Evidence: A learner completes the surface by explaining the result, passing a changed case and identifying what still requires supervised target-equipment practice.

    Avoid: Treating an acknowledged message or one successful rerun as handover.

Diagnostic matrix / 04

Symptoms, proving points and next actions

The table is a reasoning aid, not a parts-replacement chart. Preserve the initial symptom, inspect the named boundary and use the interpretation to choose the next controlled test. Site safety procedures and equipment manuals remain authoritative.

Diagnostic symptoms, inspection points, interpretations and next actions for PLC training curriculum feature: implementation, evidence and troubleshooting
Observed symptomInspectInterpretationNext proving action
The expected result is unclearRequirement, initial state, actor, stimulus, units and pass conditionThe learner, instructor and assessor may be solving different versions of the task.Rewrite one observable acceptance case before continuing.
Internal state changes but the outcome does notRequest, final owner, output or service boundary and independent feedbackA software or interface indication proves intent at one layer, not the complete outcome.Trace the first boundary after the changing state.
Normal case passes but an edge case failsLimits, timing, simultaneous events, reset and restart assumptionsThe implementation contains a hidden assumption exposed by the changed condition.Add the failed boundary as a permanent regression case.
The failure disappears after resetOriginal symptom, histories, diagnostics, timestamps and active causeReset changed evidence or state without proving the initiating cause.Reproduce under a controlled condition and preserve pre/post-event data.
Simulator and target disagreeModel boundary, software version, task timing, I/O behavior, data types and configurationA learning model and the intended target do not share one of the recorded assumptions.Reduce the case and verify against current target documentation.
The result cannot be explainedPrediction, observation, proving action, alternative hypotheses and limitationsActivity occurred but the evidence is not yet transferable or reviewable.Have the learner defend the signal path and repeat a changed case.

Product evidence / 05

What the browser practice can actually demonstrate

The browser platform can retain programs, scenario results, attempts and observable machine state so practice is attached to evidence rather than seat time alone.

Where simulation stops

A digital curriculum cannot create occupational authorization, accredited credit, physical wiring competence or vendor certification without the responsible institution and supervised practice.

Commissioning notebook / 06

Six cases that turn the concepts into evidence

Use these as written briefs rather than click-through instructions. For every case, state the expected condition before acting, retain the first useful observation and explain why the final result proves the requirement. A different program or component choice can still be correct when it produces the same bounded behavior and evidence.

Case 01

predict → observe → prove

Prove define the operating contract

Engineering context. learner goal, prerequisite knowledge, competency sequence, practice ratio, scenario, assessment, feedback, remediation, accessibility, portfolio evidence and physical transfer. For sequenced PLC curriculum, practice and mastery evidence, record the initial condition, actor, requested change, observable result and stopping condition before selecting a tool or implementation. Begin with a written normal condition and identify which request, state, physical result or communication value will provide independent confirmation. Do not begin by changing the configuration; the initial state is part of the evidence and should remain reproducible.

Controlled setup. Use the “Write the acceptance case” stage of the workflow: convert learner goal, prerequisite knowledge, competency sequence, practice ratio, scenario, assessment, feedback, remediation, accessibility, portfolio evidence and physical transfer into initial conditions, one stimulus and observable pass criteria. The acceptance record should show this result: another person can repeat the case without guessing the intended result. Record initial conditions, the exact stimulus and the observation point so another learner can repeat the case without relying on your memory.

Fault challenge. Introduce or analyse “The expected result is unclear” as one bounded deviation. Inspect requirement, initial state, actor, stimulus, units and pass condition The working interpretation is that the learner, instructor and assessor may be solving different versions of the task. The next proving action is to rewrite one observable acceptance case before continuing. Change only one condition before observing the result, and preserve timestamps or measurements where timing matters.

Review and recovery. The most common trap here is using page completion or an animation as the acceptance criterion. After restoring the cause, repeat the normal case and at least one stop, timeout, disconnect or restart boundary relevant to this topic. Remove temporary forces and bypasses, return the model to a known state and retain the evidence that both operation and recovery are deliberate.

Explain it aloud: What order should a PLC curriculum follow? A defensible short answer is: Begin with I/O and scan truth, then start-stop logic, timers, counters, state, sensors, motors, analog values, HMI, networks and troubleshooting.

Case 02

predict → observe → prove

Prove map the evidence path

Engineering context. competency statement through lesson, worked example, runnable task, changed case, result, explanation, assessor or self-review and next decision. Separate request, internal state, output or service, physical or user-visible result and independent feedback so each boundary can be inspected. Begin with a written normal condition and identify which request, state, physical result or communication value will provide independent confirmation. Do not begin by changing the configuration; the initial state is part of the evidence and should remain reproducible.

Controlled setup. Use the “Build the map” stage of the workflow: document competency statement through lesson, worked example, runnable task, changed case, result, explanation, assessor or self-review and next decision and name who owns each state or decision. The acceptance record should show this result: every request and result has a source, destination and useful inspection point. Record initial conditions, the exact stimulus and the observation point so another learner can repeat the case without relying on your memory.

Fault challenge. Introduce or analyse “Internal state changes but the outcome does not” as one bounded deviation. Inspect request, final owner, output or service boundary and independent feedback The working interpretation is that a software or interface indication proves intent at one layer, not the complete outcome. The next proving action is to trace the first boundary after the changing state. Change only one condition before observing the result, and preserve timestamps or measurements where timing matters.

Review and recovery. The most common trap here is using the same value as command, status and independent feedback. After restoring the cause, repeat the normal case and at least one stop, timeout, disconnect or restart boundary relevant to this topic. Remove temporary forces and bypasses, return the model to a known state and retain the evidence that both operation and recovery are deliberate.

Explain it aloud: How do I know a PLC lesson is mastered? A defensible short answer is: The learner should predict and produce the required behavior, solve a changed or faulted case and explain what remains unproven outside simulation.

Case 03

predict → observe → prove

Prove prove normal operation

Engineering context. one learning unit completed with a successful normal case and a changed case explained without copying. Run more than one cycle from a known state and retain the values, timings or artifacts that demonstrate repeatability. Begin with a written normal condition and identify which request, state, physical result or communication value will provide independent confirmation. Do not begin by changing the configuration; the initial state is part of the evidence and should remain reproducible.

Controlled setup. Use the “Run the baseline” stage of the workflow: apply one learning unit completed with a successful normal case and a changed case explained without copying from a clean start and record the expected evidence. The acceptance record should show this result: repeated runs produce the same bounded result. Record initial conditions, the exact stimulus and the observation point so another learner can repeat the case without relying on your memory.

Fault challenge. Introduce or analyse “Normal case passes but an edge case fails” as one bounded deviation. Inspect limits, timing, simultaneous events, reset and restart assumptions The working interpretation is that the implementation contains a hidden assumption exposed by the changed condition. The next proving action is to add the failed boundary as a permanent regression case. Change only one condition before observing the result, and preserve timestamps or measurements where timing matters.

Review and recovery. The most common trap here is changing several parameters before a baseline exists. After restoring the cause, repeat the normal case and at least one stop, timeout, disconnect or restart boundary relevant to this topic. Remove temporary forces and bypasses, return the model to a known state and retain the evidence that both operation and recovery are deliberate.

Explain it aloud: What should I learn first about sequenced PLC curriculum, practice and mastery evidence? A defensible short answer is: Start with the operating contract and evidence path: learner goal, prerequisite knowledge, competency sequence, practice ratio, scenario, assessment, feedback, remediation, accessibility, portfolio evidence and physical transfer, followed by competency statement through lesson, worked example, runnable task, changed case, result, explanation, assessor or self-review and next decision. Add advanced features only after the baseline is predictable.

Case 04

predict → observe → prove

Prove exercise a boundary case

Engineering context. skipped prerequisite, repeated failure, copied solution, accessibility barrier, long gap, unfamiliar interface, partial completion and retest. Choose minimum, maximum, simultaneous, delayed or restart conditions that reveal assumptions hidden by the happy path. Begin with a written normal condition and identify which request, state, physical result or communication value will provide independent confirmation. Do not begin by changing the configuration; the initial state is part of the evidence and should remain reproducible.

Controlled setup. Use the “Challenge assumptions” stage of the workflow: test skipped prerequisite, repeated failure, copied solution, accessibility barrier, long gap, unfamiliar interface, partial completion and retest without changing the acceptance contract. The acceptance record should show this result: limits, timing and restart behavior reach defined states. Record initial conditions, the exact stimulus and the observation point so another learner can repeat the case without relying on your memory.

Fault challenge. Introduce or analyse “The failure disappears after reset” as one bounded deviation. Inspect original symptom, histories, diagnostics, timestamps and active cause The working interpretation is that reset changed evidence or state without proving the initiating cause. The next proving action is to reproduce under a controlled condition and preserve pre/post-event data. Change only one condition before observing the result, and preserve timestamps or measurements where timing matters.

Review and recovery. The most common trap here is testing only one ideal sequence. After restoring the cause, repeat the normal case and at least one stop, timeout, disconnect or restart boundary relevant to this topic. Remove temporary forces and bypasses, return the model to a known state and retain the evidence that both operation and recovery are deliberate.

Explain it aloud: How do I practise sequenced PLC curriculum, practice and mastery evidence effectively? A defensible short answer is: Use short cases with known initial conditions, a written prediction, one action and an observable result. Then alter a boundary or fault and explain why the evidence changed.

Case 05

predict → observe → prove

Prove diagnose a controlled fault

Engineering context. a prerequisite, explanation, practice, task, assessment, feedback, remediation, accessibility or transfer gap. Preserve the first symptom, divide the system at a measurable boundary and change one condition only after predicting the result. Begin with a written normal condition and identify which request, state, physical result or communication value will provide independent confirmation. Do not begin by changing the configuration; the initial state is part of the evidence and should remain reproducible.

Controlled setup. Use the “Isolate one failure” stage of the workflow: introduce or analyse a prerequisite, explanation, practice, task, assessment, feedback, remediation, accessibility or transfer gap and locate the first disagreement. The acceptance record should show this result: the proving action distinguishes the leading hypotheses. Record initial conditions, the exact stimulus and the observation point so another learner can repeat the case without relying on your memory.

Fault challenge. Introduce or analyse “Simulator and target disagree” as one bounded deviation. Inspect model boundary, software version, task timing, I/O behavior, data types and configuration The working interpretation is that a learning model and the intended target do not share one of the recorded assumptions. The next proving action is to reduce the case and verify against current target documentation. Change only one condition before observing the result, and preserve timestamps or measurements where timing matters.

Review and recovery. The most common trap here is resetting, forcing or replacing before evidence is retained. After restoring the cause, repeat the normal case and at least one stop, timeout, disconnect or restart boundary relevant to this topic. Remove temporary forces and bypasses, return the model to a known state and retain the evidence that both operation and recovery are deliberate.

Explain it aloud: What counts as proof of competence? A defensible short answer is: A repeatable artifact or system result plus an explanation of the signal path is stronger than time spent, screenshots or a copied answer. Physical competence requires separate supervised evidence.

Case 06

predict → observe → prove

Prove transfer and hand over

Engineering context. portfolio artifacts reviewed and paired with supervised electrical, instrument and target-controller practice. Restore normal state, remove temporary changes, repeat affected checks and document which claims remain limited to the learning environment. Begin with a written normal condition and identify which request, state, physical result or communication value will provide independent confirmation. Do not begin by changing the configuration; the initial state is part of the evidence and should remain reproducible.

Controlled setup. Use the “Close the evidence loop” stage of the workflow: complete portfolio artifacts reviewed and paired with supervised electrical, instrument and target-controller practice and repeat the affected regression cases. The acceptance record should show this result: a learner completes the surface by explaining the result, passing a changed case and identifying what still requires supervised target-equipment practice. Record initial conditions, the exact stimulus and the observation point so another learner can repeat the case without relying on your memory.

Fault challenge. Introduce or analyse “The result cannot be explained” as one bounded deviation. Inspect prediction, observation, proving action, alternative hypotheses and limitations The working interpretation is that activity occurred but the evidence is not yet transferable or reviewable. The next proving action is to have the learner defend the signal path and repeat a changed case. Change only one condition before observing the result, and preserve timestamps or measurements where timing matters.

Review and recovery. The most common trap here is treating an acknowledged message or one successful rerun as handover. After restoring the cause, repeat the normal case and at least one stop, timeout, disconnect or restart boundary relevant to this topic. Remove temporary forces and bypasses, return the model to a known state and retain the evidence that both operation and recovery are deliberate.

Explain it aloud: Why test faults and restart behavior? A defensible short answer is: Because a prerequisite, explanation, practice, task, assessment, feedback, remediation, accessibility or transfer gap or skipped prerequisite, repeated failure, copied solution, accessibility barrier, long gap, unfamiliar interface, partial completion and retest can expose assumptions that never appear during ideal startup and steady operation.

Answer surface / 07

Questions people ask about PLC training curriculum feature

These concise answers define the operating, training and product boundaries most often missed in broad summaries. The full workflow and diagnostic table above provide the evidence behind them.

What order should a PLC curriculum follow?

Begin with I/O and scan truth, then start-stop logic, timers, counters, state, sensors, motors, analog values, HMI, networks and troubleshooting.

How do I know a PLC lesson is mastered?

The learner should predict and produce the required behavior, solve a changed or faulted case and explain what remains unproven outside simulation.

What should I learn first about sequenced PLC curriculum, practice and mastery evidence?

Start with the operating contract and evidence path: learner goal, prerequisite knowledge, competency sequence, practice ratio, scenario, assessment, feedback, remediation, accessibility, portfolio evidence and physical transfer, followed by competency statement through lesson, worked example, runnable task, changed case, result, explanation, assessor or self-review and next decision. Add advanced features only after the baseline is predictable.

How do I practise sequenced PLC curriculum, practice and mastery evidence effectively?

Use short cases with known initial conditions, a written prediction, one action and an observable result. Then alter a boundary or fault and explain why the evidence changed.

What counts as proof of competence?

A repeatable artifact or system result plus an explanation of the signal path is stronger than time spent, screenshots or a copied answer. Physical competence requires separate supervised evidence.

Why test faults and restart behavior?

Because a prerequisite, explanation, practice, task, assessment, feedback, remediation, accessibility or transfer gap or skipped prerequisite, repeated failure, copied solution, accessibility barrier, long gap, unfamiliar interface, partial completion and retest can expose assumptions that never appear during ideal startup and steady operation.

Can browser practice replace official software or hardware?

No. It can build concepts and diagnostic reasoning. Exact firmware, I/O electrical behavior, networking, safety and commissioning require current official tools, documentation and target equipment.

How should progress be documented?

Keep the requirement, initial state, program or configuration, observed values, fault hypothesis, proving action, recovery result and a concise limitations statement.