Free PLC Software You Can Practise With at Home

Why practise at home at all

Class hours are limited and shared. The students who progress fastest are the ones who open the software on their own laptop in the evening and try things. You cannot learn to program by watching someone program, any more than you can learn to drive from the passenger seat.

You do not need a PLC to start. You do eventually.

What is actually available

Vendor licensing changes, so verify the current terms on the vendor's own site before relying on any of this. As a map of the landscape:

Codesys. The development environment used by many vendors under their own branding. Free to download and use for development, with a built-in simulator. Because it is IEC 61131-3 all the way through, what you learn transfers. This is the best general starting point if you have no vendor preference.

Siemens TIA Portal. Offered as a time-limited trial. TIA Portal also includes PLCSIM, which simulates the controller, so you can write and test logic with no hardware. Given Siemens' dominance in Indian manufacturing, this is the highest-value environment to become fluent in.

Rockwell Studio 5000 and its simulator. Rockwell offers limited free tiers and student options that vary by region. Worth checking, because Allen-Bradley appears constantly in MNC plant adverts.

Mitsubishi GX Works. Trial and educational versions appear periodically. Common in Indian machine building.

Ignition by Inductive Automation. Free in trial mode with the only restriction being that you reset a timer every two hours. For learning SCADA this is exceptional: a full, modern, production-grade platform you can build real projects in. Worth knowing precisely because most training does not cover it.

Factory I/O. Not free, but a trial exists. A 3D factory simulator that connects to a real or simulated PLC, so your logic drives a virtual conveyor, sorting station or lift. See Factory I/O for PLC training. The closest thing to hardware without hardware.

Open-source options such as OpenPLC exist and are useful for understanding, though they are not what employers use.

What to actually do with them

Downloading software is not practice. A programme of work:

Week 1. Motor start-stop with a seal-in. Then add an interlock. Then add a second start station. Then break it deliberately and fix it online.

Week 2. Timers: start delay, run-on fan, blocked filter alarm with an on-delay. Then a counter and a batch count.

Week 3. A three-station sequence with a step counter, including a proper stop and a restart from a safe state.

Week 4. Analog scaling with NORM_X and SCALE_X, plus a wire-break detection alarm.

Week 5 and 6. An HMI for the sequence: mimic, alarms with dead-bands, a trend. See alarm configuration.

Week 7 onwards. One substantial machine, taken from written specification to working simulation with documentation. That project is what you talk about in interviews. See portfolio projects that get interviews.

Where a simulator stops being enough

Be honest with yourself about this. A simulator cannot teach you:

• Wiring a panel, and finding your own wiring error with a meter
• What a 4 to 20 mA loop does when a wire is damaged
• Setting up a VFD from a real motor nameplate and bump-testing it
• Commissioning pressure, when a plant is waiting
• That the drawing is wrong

Employers know this, and it is why "I have practised on a simulator" and "I have commissioned a panel" produce different interview outcomes. See PLC simulator vs real hardware.

Use simulators for logic fluency, which is genuinely valuable, and be clear that the hardware half still has to happen somewhere.

Legality matters

Do not use cracked software. Two practical reasons beyond the obvious: pirated engineering software is a common malware vector, and being unable to say honestly that you have used licensed tools is awkward when an employer asks.

Vendor trials, educational licences and Codesys give you enough to learn on legitimately.

When you are ready for hardware

The Automation Engineer Program covers 20 PLC brands on real panels, with licensed software, and puts you on live client projects. If you have been practising at home and want to close the hardware gap, that is exactly the gap it exists to close. Talk to a counsellor.

Related: Factory I/O simulation, How long it takes to learn PLC programming.