slickz44/DT_PSA_OPCV_Siemens ? reverse-engineered prompt

Build me a Siemens PLC and HMI project for a digital twin of a laser welding and assembly machine.

I want the control logic laid out in a clean, reusable way, with one machine layer, separate station logic, actuator control, step sequences, and a simple overview screen that shows the machine and each function group status. It should support manual operation, homing, automatic mode, single step use, fault handling, and reset behavior. Please make it match a virtual commissioning setup, so it can be run together with the provided emulation tools and the HMI can be used to inspect and operate the machine.

Use the existing project files in this repository as the base, keep the structure consistent and easy to follow, and make sure the Siemens side is ready to be opened in TIA Portal V19. If you need current setup details or tool behavior, look up the latest docs online and keep the implementation aligned with that workflow.