Hello Skooter,
I am sorry I upset you. Unit was bought near Hasselbol, Sweden and the programs on disk they used was inside . Sure unit was used in welding task. However,my experience with such unit is limited then my knowledge upon use or reverse Engineering with logical circuits made me elaborate conclusions above. Just to confirm the read/write flow of data from floppy disk drive using Siemens SAB 2797 I will attach the datasheet.Scans-00116146-Siemens 2797 .pdf. I sent a request to company that you suggested. I do have all 'delivered' manuals of S2 ( since I have also a IRB6/2 mechanical complete unit ) but I found not yet details about DSMC110 -floppy drive unit related . I do consider this thread closed. Beside the subject : back '85..'87 our national educational system teach me LSI like 8253 but already ABB build IRB6 with M68000, in '95 I 'play' with National Instrumets under Win 3.3 but Kuka sold already 180k units from G90/G120 type models. There is a gap in knowledge I should consider. I think you need patience with things you read in this forum Thank you.