Furthermore, UML diagrams can improve quality and reliability by identifying and eliminating potential errors, bugs, and inconsistencies in your software logic, data, and behavior.

The third step to troubleshoot ladder logic diagrams is to simulate the diagram using a software tool or a test mode. You can use a software tool such as RSLogix, Ladder Logic Simulator, or PLC ...

These free PLC Simulation software for Engineering Students let you practice without connecting your PC with a PLC hardware.