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Showing results for tags 'class 8020'.
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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?