PLC Simulator
PLCSIM alternative

A PLCSIM Alternative for Learners Without TIA Portal

PLCSIM is Siemens-official and production-grade — and needs a TIA Portal licence and Windows box to run. If you are still learning, here is a realistic browser-based path to Siemens fluency.

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Opening honesty

PLCSIM is the real deal for real Siemens work.

If you are a working controls engineer paid to prove an S7-1500 project runs identically in simulation and production, PLCSIM is what you use. Full stop. This page is for everyone who is learning Siemens from zero and cannot justify — or does not yet need — TIA Portal plus PLCSIM plus a Windows machine.

A free browser-based Siemens-style PLC simulator running on Mac, Linux, Windows, and Chromebook with no install — a no-licence alternative to S7-PLCSIM for learning TIA Portal programmingA web browser window running a PLC ladder logic simulator with an input/output strip, requiring no installation or download.plcsimulator.app/playno installINPUTSOUTPUTS
No TIA Portal, no Windows VM, no 20 GB install — Siemens-dialect practice runs in any browser tab.

Background

What PLCSIM is

PLCSIM is Siemens\'s official simulation tool for SIMATIC S7 controllers. PLCSIM Classic is bundled with TIA Portal V17+ and handles basic S7-1200 / S7-1500 simulation. PLCSIM Advanced is a separate floating licence that gives higher-fidelity simulation of S7-1500, ET 200SP, and Open Controller — used in industry for digital-twin commissioning, software-in-the-loop testing, and automated test benches. Current version is V7.0.

Pricing: PLCSIM Classic is bundled with TIA Portal (roughly €300 Starter to €4,000 Professional per year). PLCSIM Advanced is a separate licence, historically €1,500–€3,000 for a two-PLC-instance seat, quoted by hardware ID through a Siemens distributor. 90-day proof-of-concept licences exist but are not designed for learner use.

The SIMATIC S7-1500 controller model that S7-PLCSIM emulates — CPU, input and output modules, and memory that a Siemens PLC simulator reproduces in softwareA modular PLC rack on a backplane: power supply, CPU processor, input module, output module and a communications module side by side.PLC RACKbackplane busPSUPowerCPUProcessorDIInputDOOutputNETComms
PLCSIM emulates the S7 CPU and I/O model; our browser simulator teaches the same controller mental model without the hardware.

Strengths

What PLCSIM does well

Production-grade fidelity

It is the only environment that can faithfully emulate an S7 controller's behavior across every instruction, timing corner, and PROFINET edge case.

TIA Portal integration

PLCSIM Classic opens from TIA Portal. Download your project, flip to sim, and your programmer workflow is continuous.

Digital twin and test automation

PLCSIM Advanced exposes an API for automated software-in-the-loop testing. That is a serious industrial capability.

The OB1 cyclic scan — read inputs, execute program, write outputs — that S7-PLCSIM reproduces with production timing and our browser simulator teaches for learning Siemens fundamentalsThe repeating PLC scan cycle: read inputs, execute the ladder logic, update outputs, then housekeeping, looping continuously.1Read Inputs2Execute Logic3Update Outputs4HousekeepingSCANCYCLE
PLCSIM nails every timing corner of the OB1 scan cycle; for building the mental model, a learner simulator covers the same read-solve-write loop.

Where it stalls a learner

Where PLCSIM falls short for someone still learning

Requires TIA Portal license

PLCSIM Classic needs a TIA Portal seat — €1,200+/yr minimum. PLCSIM Advanced stacks another €1,500+ on top. That is not a learner budget.

Windows-only

Mac, Linux, and Chromebook users are excluded unless they run a licensed Windows VM.

20 GB install

TIA Portal + PLCSIM pushes 20 GB. On a corporate-managed laptop that alone is a multi-hour conversation with IT.

Overkill for learning

You do not need production fidelity to learn the scan cycle. You need scored scenarios and repetition.

No learner scaffolding

PLCSIM shows you a live tag table, not a curriculum. If you are teaching yourself, there is no scenario that tells you whether your code is right.

No cross-dialect practice

PLCSIM is Siemens-only. For many learners a week of Allen-Bradley practice is what makes Siemens click — a cross-dialect habit PLCSIM cannot build.

Feature comparison

PLCSIM vs plcsimulationsoftware.com

FeaturePLCSIMOurs
PlatformWindows only + TIA PortalAny browser
Price€1,200+/yr (Classic), €3,000+ (Advanced)Free tier + Pro monthly
FidelitySiemens-official production-gradeLearner-grade, Siemens dialect
Cross-dialectNoIEC, Allen-Bradley, Siemens
Install footprint~20 GBZero
Scored scenariosNo140 published
Interview-timerNoYes (Pro)
Portfolio exportNoYes (Pro)
Digital-twin / SiL APIYes (Advanced)No
PROFINET / Safety-FYes (Advanced)No

Which PLCSIM?

PLCSIM Classic vs PLCSIM Advanced

People searching for a PLCSIM alternative often mean two different products. It is worth being precise about which one you need before you decide a browser simulator is enough.

PLCSIM Classic

Bundled with TIA Portal V17+. Simulates S7-1200 / S7-1500 logic so you can test blocks without hardware. No external API, no co-simulation — it lives inside the TIA Portal workflow. This is the one most learners think of, and the IEC 61131-3 logic it runs is exactly what transfers to our browser simulator.

PLCSIM Advanced

A separate paid licence. Exposes an API for software-in-the-loop testing and digital-twin commissioning, and simulates a virtual PROFINET interface so SCADA, HMIs, and test benches can connect as if to a real S7-1500. This is a production engineering tool — a browser learning simulator is not a substitute for it.

A PROFINET network of HMI, SCADA, and S7-1500 controllers that PLCSIM Advanced simulates for software-in-the-loop testing — capability our browser learning simulator does not replicateAn industrial Ethernet/IP or PROFINET network: a PLC, operator HMI, a variable frequency drive and remote I/O all connected through a network switch.SWITCHEthernet/IP · PROFINETPLCHMIVFDI/Ostar topology via managed switch
PLCSIM Advanced simulates a virtual PROFINET network for digital-twin testing — we do not simulate PROFINET, and we are honest about that.

Use PLCSIM if…

  • You are a working Siemens engineer doing digital-twin or SiL work.
  • Your employer has TIA Portal + PLCSIM Advanced licenses.
  • You need production-identical behavior for a deployment.
  • You are testing PROFINET topology or F-safety logic.
  • You are building automated test benches around PLCSIM Advanced\'s API.

Use us if…

  • You are learning Siemens from zero without a TIA license.
  • You are on Mac, Linux, or a Chromebook.
  • You are prepping for a Siemens-dialect interview in the next 4 weeks.
  • You want scored scenarios and immediate feedback.
  • You want to bounce between IEC, AB, and Siemens dialects.
  • You need a PDF portfolio to send to hiring managers.

Siemens-flavoured scenarios

Practice with TIA Portal conventions

The four IEC 61131-3 languages used in TIA Portal — Ladder, Structured Text, Function Block Diagram, and SFC — that a PLCSIM alternative lets you practice to learn S7-1200 and S7-1500 programmingThe five IEC 61131-3 PLC programming languages as chips: Ladder Diagram, Function Block Diagram, Structured Text, Instruction List and Sequential Function Chart.IEC 61131-3 — five languagesLDLadder DiagramFBDFunction BlockSTStructured TextILInstruction ListSFCSequential Func. Chart
The same LD, ST, and FBD languages you write in TIA Portal — practice the syntax that transfers directly.
Siemens-style structured text (SCL) IF/THEN logic running in a browser PLC simulator — a free S7-PLCSIM alternative for learning TIA Portal structured text programming on any operating systemA small Structured Text code block in an editor: an IF/THEN condition, a TON timer call and assignments, showing text-based PLC programming.main.st — Structured Text1IF Start AND NOT Stop THEN2 Run := TRUE;3END_IF;4DelayTmr(IN := Run, PT := T#5s);5Lamp := DelayTmr.Q;
Structured text mirrors Siemens SCL — the IEC core ports straight into TIA Portal.

Motor Start / Stop

Classic Siemens tutorial — seal-in, interlock, #Tag notation.

View scenario →

PID Temperature

PID_Compact-style tuning in the Siemens dialect.

View scenario →

Boiler Startup

OB1-style multi-step sequence with timer interlocks.

View scenario →

Chiller Sequencing

Lead/lag logic — common in Siemens building automation.

View scenario →

Batch Mixer

Recipe DB + function block pattern.

View scenario →

Fermentation Temp

Precision analog temperature control with alarms.

View scenario →
A Siemens-style motor start/stop seal-in rung with #Tag notation — the classic TIA Portal exercise you can practice in a free browser PLCSIM alternativeA seal-in latch rung: a Start contact in parallel with a Hold contact, in series with a normally-closed Stop contact, driving an output coil.StartHold (seal)StopMotor
Seal-in latch with #Tag notation — the first rung every Siemens learner writes.
IEC TON, TOF, and TP timers as used on Siemens S7-1500 — the same timer instructions you practice in a TIA Portal-style browser simulatorA TON on-delay timer: the accumulated time bar ramps up toward the preset value, and the done (DN) bit turns on when the accumulator reaches preset.TONPRE 5000ACCACC ramps to PREPREDNdone bit
IEC TON / TOF / TP timers behave exactly as they do in the Siemens dialect.
Analog input scaling and PID temperature control in the Siemens dialect — PID_Compact-style practice in a browser-based S7-PLCSIM alternativeA 4 to 20 milliamp analog signal from a sensor, read by the analog input card and scaled linearly into engineering units such as degrees Celsius.sensor4-20mAAI cardADC62.5deg C (scaled)10004mA20mAlinear scaling
Analog scaling and PID_Compact-style loops — the basis of the PID temperature scenario.

Third options

Other honest options

Mac users

S7-PLCSIM on Mac — your honest options

S7-PLCSIM does not run on macOS. PLCSIM Classic is a Windows-only application that ships inside TIA Portal — and TIA Portal has never had a native Mac build. There is no official Siemens workaround. If you are on a Mac and need PLCSIM, your realistic options are:

  • 1Parallels Desktop + Windows license — the most practical path for serious Siemens work. Parallels runs Windows at near-native speed on Apple Silicon. You will need a Windows 11 licence (~$120) and a TIA Portal licence. The combined cost is significant but it gives you genuine PLCSIM fidelity.
  • 2VMware Fusion (free for personal use on Apple Silicon) — another VM path. Requires the same Windows licence and TIA Portal seat. Performance on M-series chips is generally good for an IDE workload.
  • 3Browser-based Siemens-dialect practice — if you are learning Siemens syntax and the scan-cycle mental model rather than testing a specific production project, this simulator runs Siemens-style ladder and structured text on any Mac, in Safari or Chrome, with no VM or licence required. See the PLC simulator for Mac page for the full comparison.

If your goal is learning Siemens before you have access to a Windows TIA Portal seat, option 3 is the fastest path. If your goal is production commissioning or testing real project files, option 1 or 2 is the honest answer — a browser simulator cannot substitute for PLCSIM fidelity.

On Linux or a Chromebook? The same three options apply. S7-PLCSIM is Windows-only, so Linux users run TIA Portal in a Windows VM (VirtualBox, KVM, or a paid VM) for genuine PLCSIM fidelity. Chromebooks cannot run TIA Portal at all. For learning the Siemens dialect and scan-cycle model, our browser simulator runs natively in Chrome on Linux and Chrome OS — no VM, no licence, nothing to install.

Questions

PLCSIM alternative FAQ

No. PLCSIM Classic and PLCSIM Advanced are made by Siemens and emulate S7 controller behavior with production-grade fidelity. Our simulator is an independent learner-focused product that teaches Siemens-style ladder, structured text, and FBD in a browser. If you need to prove that a specific S7-1500 project will execute identically to production, you need PLCSIM, not us.

Start Siemens-style practice today.

No TIA Portal license. No Windows. No install.

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Software evaluation field guide

Siemens PLCSIM alternative: evaluation checklist

Direct answer

The evaluator can choose by CPU fidelity, project compatibility, network need, machine model, operating system, license and target evidence.

Written for siemens learners and controls teams deciding between browser practice, S7-PLCSIM, PLCSIM Advanced, soft PLC and connected machine simulation.

System map / 02

NODE 01observable

Requirement

The S7 family, TIA release, project, CPU fidelity, network, machine model, platform and evidence required.

NODE 02observable

Test job

Engineering project through compile or learning runtime to simulated I/O, network peers and visible process state.

NODE 03observable

Baseline result

One representative S7-oriented sequence executed in each shortlisted environment.

NODE 04observable

Stress case

Startup OBs, optimized blocks, timing, networking, instance limits, licensing and hardware connection.

NODE 05observable

Failure handling

A project, version, block, I/O, network, model or workflow mismatch exposed by the proof case.

NODE 06observable

Decision record

The learning result recreated and accepted in official Siemens tools and the intended target.

Continue the signal path / 08

Siemens learning path

Practice the control idea, then prove it in TIA Portal

Follow the same task through browser practice, Siemens-style addressing and the official project and controller workflow.