PLC Simulator
Product-led practice library

Industrial exercises that end in evidence, not another article.

24 distinct technical jobs open a matching server-graded lab. Run publicly, then save projects, retain full attempt history, share results or assign cases in a paid training workspace.

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8 runnable cases

4–20 mA calibration cases

Distinct ranges, signals, units and fault traps for process instruments.

Gauge pressure transmitter

Scale a 4–20 mA Pressure Transmitter: 0–10 bar

Calculate and grade a 0–10 bar pressure-transmitter signal at 12 mA, then record the calibration evidence and live-zero checks.

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RTD temperature transmitter

Scale a 4–20 mA Temperature Transmitter: −50 to 150 °C

Work a bipolar temperature-transmitter scaling example at 8 mA and verify the result in a server-graded instrumentation lab.

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Hydrostatic level transmitter

Scale a 4–20 mA Tank Level Transmitter: 0–5 m

Convert a 16 mA level signal into metres, verify 75% span and carry the evidence into the instrumentation simulator.

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Magnetic flow transmitter

Scale a 4–20 mA Flow Transmitter: 0–200 m³/h

Calculate an 80 m³/h flow indication from 10.4 mA and validate the linear scaling in the browser lab.

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Control-valve position transmitter

Scale a 4–20 mA Valve Position Feedback Signal

Translate 18.4 mA into 90% valve travel and separate feedback scaling from the output command.

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Vacuum pressure transmitter

Scale a Vacuum Transmitter: −100 to 0 kPa

Solve a negative-range 4–20 mA vacuum-transmitter example at 6.4 mA and verify the −85 kPa result with graded evidence.

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Low-range differential-pressure transmitter

Scale a Differential-Pressure Transmitter: 0–250 Pa

Calculate a 160 Pa filter differential from 14.24 mA and verify the air-handler alarm input scaling in the graded lab.

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Conductivity transmitter

Scale a Conductivity Transmitter: 0–20 mS/cm

Convert 7.2 mA into 4 mS/cm and validate the analogue scaling used by a water-quality interlock.

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8 runnable cases

Industrial multimeter plans

Grade state, mode, placement, range and expected evidence before a measurement.

24 VDC control power supply

Measure a 24 VDC PLC Control Supply Safely

Choose the correct multimeter mode, probe placement, circuit state and range for a live 24 VDC control supply.

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Control transformer secondary

Measure a 120 VAC Control-Transformer Secondary

Build a safe multimeter plan for a 120 VAC transformer secondary using AC voltage mode and a suitable range.

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230 VAC contactor coil

Check Voltage Across a 230 VAC Contactor Coil

Plan a 230 VAC coil-voltage measurement that separates a missing command from a mechanically failed contactor.

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Removed control fuse

Test an Industrial Control Fuse for Continuity

Choose isolation, prove-dead, continuity mode and across-component placement before testing a removed control fuse.

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Isolated contactor coil

Measure Contactor-Coil Resistance After Isolation

Plan a de-energised resistance check across an isolated contactor coil and recognise open-circuit evidence.

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4–20 mA transmitter loop

Measure 4–20 mA Loop Current in Series

Plan a controlled loop-current measurement using the fused mA input, current mode and series placement.

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Three-wire proximity sensor

Check a 3-Wire Proximity Sensor’s 24 VDC Supply

Select a safe voltage measurement between the brown and blue conductors before diagnosing the sensor output.

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Disconnected three-phase motor

Compare Three-Phase Motor Winding Resistance

Plan an isolated phase-to-phase resistance comparison that looks for balance rather than one universal ohm value.

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8 runnable cases

Modbus integration examples

Preconfigured function, address and quantity examples for real industrial device jobs.

Variable-frequency drive

Read VFD Output Frequency With Modbus Function 03

Compose a Modbus request for a VFD output-frequency holding register and verify the zero-based address and quantity.

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Energy meter

Read an Energy Meter With Modbus Function 04

Build a two-register input-register poll for a 32-bit energy-meter value and retain word-order evidence.

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Panel temperature controller

Read a Temperature Controller Process Value Over Modbus

Compose a function-03 poll for a scaled temperature process value at protocol address 200.

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Remote-I/O coupler

Read 16 Remote-I/O Coils With Modbus Function 01

Build a packed 16-coil function-01 poll and verify the bit quantity and zero-based start address.

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Remote-I/O digital-input module

Read 16 Remote-I/O Inputs With Modbus Function 02

Compose a Modbus function-02 request for 16 read-only remote-I/O inputs and verify the address, quantity and packed-bit evidence.

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Pump controller

Write a Pump Run Coil With Modbus Function 05

Encode an ON command as FF00 for a documented pump run coil and verify the function-05 request.

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Temperature controller

Write a Temperature Setpoint With Modbus Function 06

Compose a single-register setpoint write and preserve the distinction between engineering units and the scaled register value.

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Alarm annunciator

Write an Alarm Reset Block With Modbus Function 15

Build a packed eight-coil function-15 write and check quantity, byte count and ownership boundaries.

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Competency and practice field guide

Industrial automation training exercises: practice plan

Direct answer

The learner can choose an exercise by competency, complete it from a clean state, diagnose a variation and preserve evidence for review.

Written for pLC, electrical, instrumentation, HMI and robot learners plus instructors needing tasks that progress from prediction to diagnosis and transfer.

an operator and instructor reviewing alarm, trend, machine-state and recovery evidence in a simulation control room while studying progressive industrial automation exercises and changed-case assessment
System map / 02

NODE 01observable

Scope

Learner level, target competency, prerequisites, system model, I/O, initial state, acceptance case, allowed hints, changed case, rubric and transfer step.

NODE 02observable

Signal path

Brief through prediction, implementation, runnable behavior, automated or instructor feedback, controlled fault, explanation and retained evidence.

NODE 03observable

Baseline practice

One representative discrete, motor, analog, network or robot task completed independently without a copied solution.

NODE 04observable

Edge cases

Ambiguous brief, hidden starting state, solution leakage, inaccessible control, random faulting, weak feedback, no reset and no transfer.

NODE 05observable

Fault practice

A prerequisite, requirement, concept, implementation, signal, diagnostic, assessment or communication gap.

NODE 06observable

Transfer to the job

The result reviewed, varied and later recreated on the intended vendor software and physical equipment.

Answer surface / 07

What are good industrial automation exercises for beginners?

Start with signal tracing and start-stop, then timers, counters, sequences, motor feedback, analog scaling, PID, HMI alarms, network mapping and robot handshakes.

How should industrial exercises be assessed?

Assess prediction, runnable result, changed case, fault isolation, explanation, recovery and limitations—not time spent or a screenshot alone.