Hello,
I am not very experienced with Siemens PLC's
I want to change program in one S7-200 CPU 226 (profibus).
I have never connected my laptop to it before and I don't have that PLC's program. I have PC Adapter USB A2 cable for that and V4.0 STEP 7 MicroWIN SP7 program.
I connected the cable, opened the program and tried different settings for connection, most of times the test in diagnostics says that status is OK.
But! in communications window when ever I try to refresh the adapter is gives me error: "Class not registered"
So I'm not able to upload the program from PLC to my laptop.
Can anyone give me support?