PLC Simulator
Maintenance technician assessment software

Assess what a technician can troubleshoot—not what they can memorise

Use timed, auto-graded PLC and automation tasks to screen candidates, baseline a maintenance team and verify training transfer across motors, I/O, timers, counters, safety and process-control faults.

Practical assessment model

Functional Description to Ladder

01

Functional-description-to-ladder capstone assessment

02

Fault-injection tasks for I/O, timers, counters and scan-order defects

03

Deterministic tests repeated against the same machine physics

04

Scenario attempts, pass state and completion evidence for team review

Physics running · PLC scan active · grader armed

Performance-based evidence

One brief. One machine. Observable decisions.

Candidates receive functional requirements or a faulted control system, then produce working logic or a diagnosis. The same deterministic test cases make results comparable without reducing the exercise to multiple choice.

Pre-hire practical screen

Give candidates bounded machine requirements and observe whether their program handles normal, boundary and unsafe cases.

Skills-gap baseline

Separate ladder fundamentals, I/O diagnosis, motor control, sequencing and process-control gaps before assigning training.

Post-training verification

Re-assess with equivalent scenarios and objective test cases instead of relying on attendance or self-reported confidence.

Certification preparation

Use the 46-scenario CCST practice pack for broader controls-technician preparation and a timed mock exam.

Scenario library

Assess implementation, diagnosis and recovery separately.

Browse all scenarios
Flagship

Functional Description to Ladder

Translate a complete functional specification into working PLC logic and satisfy the full grader.

capstoneassessment
Open scenario

Scan-Order Race

Identify a defect caused by execution order rather than obvious Boolean logic.

diagnosisscan cycle
Open scenario

Timer Not Resetting

Diagnose retentive behavior and prove the correction through repeated cycles.

timerrecovery
Open scenario

Counter Never Resets

Find a production-count fault that emerges only after the sequence repeats.

counterboundary
Open scenario

Forward / Reverse Motor

Implement mutually exclusive direction control with safe stop and fault behavior.

motorinterlock
Open scenario

Level Alarms with Hysteresis

Scale process feedback and prevent alarm chatter around operating thresholds.

analogalarms
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.

  • Compare candidates against identical practical test cases
  • Identify specific control-skill gaps by scenario family
  • Verify recovery behavior rather than one successful cycle
  • Export credible evidence into a wider maintenance competency process

Free planning resource · PDF + editable CSV

Maintenance Technician Assessment Toolkit

Download a practical controls rubric, sample candidate report, role-based skills matrix and an implementation plan you can adapt before running a pilot.

Download the toolkit

Scope, stated plainly

This assesses PLC and automation-control competence only. It is not a complete maintenance-technician selection instrument and does not assess mechanical fitting, hydraulics, pneumatics, welding, refrigeration, site permits or hands-on electrical safety. Employment decisions should combine it with structured interviews and supervised practical checks.

Team training details

Pilot with your standards

Build a practical technician screen around the controls work you actually assign

Use the existing labs immediately, then map assignments and pass criteria to the equipment, failure modes and competencies your team owns.

Job-readiness and assessment field guide

Maintenance technician assessment: readiness checklist

Direct answer

The assessor can connect each score to a bounded task, observed action, measurement, explanation and recovery result.

Written for employers, instructors and technician candidates evaluating PLC, electrical, motor, sensor, instrumentation and troubleshooting evidence.

an adult learner explaining a measured PLC and motor-control result to an assessor in a vocational automation lab while studying industrial maintenance diagnostic competency assessment
System map / 02

NODE 01observable

Role scope

Job tasks, prerequisite safety, equipment boundaries, PLC logic, drawings, meters, motors, sensors, instruments, faults, rubric, time, accommodations and evidence retention.

NODE 02observable

Skills map

Task brief through safe setup, observation, measurement, diagnosis, corrective decision, restored behavior and assessor record.

NODE 03observable

Core exercise

One normal inspection and one bounded fault isolated with an explained proving action.

NODE 04observable

Stretch case

Ambiguous symptom, misleading indication, intermittent state, time pressure, changed case, inaccessible setup and incomplete recovery.

NODE 05observable

Troubleshooting

A knowledge, procedure, observation, measurement, interpretation, safety, communication or transfer gap.

NODE 06observable

Portfolio evidence

Results reviewed with supervised physical demonstration, job context and documented development actions.

Answer surface / 07

What should a maintenance technician assessment include?

Use representative tasks covering safe preparation, drawings, PLC and I/O reasoning, electrical measurements, motors, sensors, fault isolation, recovery and explanation.

Can an online assessment prove maintenance competence?

It can demonstrate bounded knowledge and diagnostic reasoning, but hands-on authorization and physical competence need separate supervised evidence.