I managed to generate Combo (input/output) PLC I/O with Loop Back Circuit via Spreadsheet to PLC I/O utility. I remember that some other people had problems doing so. All the files needed are attached. The result.dwg shows you the outcome. Feel free to use and/or modify them. Post your comments and question please!
Big thank to Acade crew for their professional support!
![Autodesk Design & Make Report](https://forums.autodesk.com/t5/image/serverpage/image-id/1350519iCB55845EBFC43016/image-size/large?v=v2&px=999" "Autodesk Design & Make Report")
