You cannot just download Proworx 32 and run it. The license is physical. The infamous Rainbow Sentinel dongle (usually parallel port, later USB) is the gatekeeper.
A municipal water authority has a 984-145 PLC running their chemical dosing system. The original programmer retired a decade ago. When a pump fails to start, the new technician uses ProWORX 32 to go online, force an output, and diagnose a stuck relay. proworx 32
A typical session for a maintenance technician using ProWorx 32 on live machinery: You cannot just download Proworx 32 and run it
Insert → Verify → Accept changes (PLC continues running, new logic active ~1 scan later).Online > Store to Flash).