PLC Logic Simulator
The PLC Logic Simulator enables simulation and analysis of PLC programs directly in the browser. Users can test logic operations, contacts, coils, timers and counters without needing real PLC hardware or a dedicated development environment.
The tool is suitable for education, training, troubleshooting and developing simple control logic. Changes to inputs and outputs are visualised immediately and help you understand controller behaviour.
What is a PLC logic simulator?
A PLC logic simulator emulates the basic functions of a programmable logic controller (PLC). Logic circuits can be created, tested and analysed before being deployed to a real controller.
This allows issues to be detected early and control sequences to be verified without commissioning machines or plants.
Key features
- Simulation of PLC inputs and outputs
- Digital contacts and coils
- AND, OR and NOT logic
- Timer functions (TON, TOF, TP)
- Counters and memory functions
- Real-time display of signal states
- Step-by-step analysis of control sequences
- Browser-based use without installation
Understanding PLC logic basics
Programmable logic controllers are used in machines, production plants, conveyor systems, building automation and many other areas. Control logic is based on signals from sensors and switches that control outputs such as motors, valves or relays.
With the simulator, users can see how signals are processed and how changes affect the control sequence.
Typical use cases
- Learning PLC fundamentals
- Education and teaching
- Preparation for PLC courses
- Analysis of control logic
- Testing simple automation tasks
- Troubleshooting logical sequences
- Documentation and demonstration of controllers
- Quick review of circuit changes
Supported PLC concepts
The simulator focuses on the fundamentals of digital control engineering. This includes normally open/closed contacts, markers, self-hold circuits, interlocks, time functions and simple sequence control.
These functions form the basis of many PLC programs in industry and automation.
Benefits of simulation
- No PLC hardware required
- Fast testing of logic changes
- Safe learning environment without risk to equipment
- Visualisation of signal states in real time
- Better understanding of complex control sequences
- Easy introduction to automation engineering
How does this tool work?
- Create or load logic circuit
- Activate input signals
- Configure timers and counters
- Start simulation
- Observe signal traces and states
- Analyse control sequences
- Optimise logic and test again
This online tool teaches PLC programming fundamentals and helps users understand, test and validate control logic – directly in the browser and without additional software.