1/27/2020 12:00 PM | |
Posts: 6 Rating: (0) |
Hi I have a problem with one of my PLCs. Problem is that I have no experience with Siemens and Step 7. So the SF light is on, BF lights blinks. Connected to the PLC and got the diagnostics buffer, hopefully someone can help with evaluating it. Event 2,3,8 and 9 is caused by an damaged encoder, so the PLC gets no response when calling it over the profibus network. But the other events I do not know what is the cause. I see that event 1,5 and 7 is the same, and that event 4,6, and 10 is the same. Any inputs? AttachmentDiagnostics.txt (222 Downloads) |
1/27/2020 12:04 PM | |
Joined: 4/28/2015 Last visit: 2/7/2024 Posts: 10533 Rating: (820) |
Hello, try put OB121 inside your prj and also download to PLC. |
With best regards... |
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1/28/2020 1:35 PM | |
Joined: 4/4/2011 Last visit: 9/19/2024 Posts: 65 Rating: (11) |
Hello! The SF error (looking in your diagnostic buffer) is from DB92 not loaded. This means you are using somewhere in software the variables in this DB but you have not downloaded this DB. If you have OB121 downloaded in PLC this would prevent it from going to STOP. The other error, BF, is external and comes from Profibus fault as you mentioned it. In this case, if OB122 is downloaded in PLC then it would prevent it from going to STOP. In any case, try to fix these errors. If you would like to prevent your CPU going to stop because of this cases then download OB121 and OB122. More can be found in manuals. Check this link for manual. Hope it helps, Mihai. |
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