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Simulators

Simulator

4-20 mA Current Loop Simulator

Run or step a virtual process signal and observe how transmitter current, PLC raw counts, and the HMI engineering value respond to healthy and faulted loop conditions.

Simulation controls

Virtual educational simulator

Move the process position to preview the signal path. Toolkit or Pro Toolkit unlocks fault modes, configuration values, Run, and Step.

Live signal path

Follow the value from the process through the transmitter, PLC input, and HMI.

Healthy 4-20 mA signal
1. Process
50%
2. Transmitter
12 mA
3. PLC input
9831 counts
4. HMI value
50 EU
Expected signal: 12 mA
Signal span: 50%
Animation tick: 0

Know what you are paying for

A calculator answers a value. This simulator follows the loop.

Ohm's Law and the everyday current calculations stay complete and free. Pay for the maintained scenario workflow only when you need to follow a process signal through the transmitter, PLC input, and HMI under changing conditions.

Complete and free

Known-value electrical math

Solve voltage, current, resistance, and power without an account or paid plan.

Use the free Ohm's Law calculator
Toolkit · $5/month

Loop behavior under conditions

Unlock Run and Step, raw-count and engineering ranges, plus open-circuit, underrange, overrange, and noise scenarios.

Compare Toolkit plans
Pro Toolkit · $15/month

Turn findings into a field record

Add browser-local commissioning and incident workflows when the result must become a structured, printable record.

See the field workflows
Requires Toolkit or Pro Toolkit

Interactive controls simulators

Free preview

Change one representative condition and watch the visible preview state respond.

Paid operation

All conditions, Run, pause, Step, fault injection, and complete state transitions require paid access.

Unlocks with Toolkit or Pro Toolkit
  • Run and Step controls
  • Every fault and configuration input
  • Complete state transitions
Toolkit $5/mo · Pro Toolkit $15/mo

Toolkit unlocks advanced tool operation. Pro Toolkit adds the troubleshooting knowledge base, field-document builders, and included library downloads.

Compare plans and unlock

Entitlement store: unavailable. No saved presets, saved settings, or customer tool history are stored in V1.

Model boundary

This simulator demonstrates signal relationships and example fault behavior. Exact underrange, overrange, raw-count, alarming, and fail-safe behavior depends on the transmitter, input module, configuration, and control program.