Simatic PC station - modules disappear when HW altered

Hello,

I have a machine using the Simatic S7 300 PLCs communicating with main PC (Configured as Simatic PC Station) via OPC. There are two HW interfaces on the computer - Ethernet and CP5611. At one point we were resolving some HW issue with that main PC and we started the PC without these HW interfaces. At that point the modules for these interfaces disappeared from list in Station Configurator and assigned S7 connections become non functional. Unfortunately modules did not reappear after returning the HW interfaces. We don't have original Step7 project for the machine. Can we do something to recover the missing modules (with their original configuration)?

Thank you.

Hello AutoGen_7682897,

Could you bring the whole program to see if it downloads everything together with those modules that already appear?