This is a critical point of confusion. It was a licensed commercial product sold by Siemens (or sometimes by third-party system integrators who bundled it with hardware).
: Various licenses are available depending on needs, including basic, user, project, and upgrade licenses. System Requirements
Do not spend weeks searching for the 2021 download. Instead, contact a local Siemens system integrator. They have legal archives of legacy software and can migrate your PSS WinPro 231 project to a modern platform for a few hours of engineering time.
If you can tell me the you are trying to connect to or the error message you're seeing, I can help you find the exact compatibility requirements.
– Many vendors have removed older versions from their official websites to push users toward paid subscription models or newer suites. This leaves technicians scrambling for archived copies.
is the Windows-based control software. It allows an operator to do things that are impossible from the front panel alone:
: 4.5/5