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S7-315

4/3/2014 3:52 PM	Rate (0)
DannyCook Posts: 11 Rating: (0)	Hi All, Ive been trying to get a s7-315 processor working but I have 2 red lights on my CPU. The SF solid light, which apparently means there is a hardware or software fault, and the BF2 light, which means there is a bus error at port 2. Could anyone help me out with how to solve these please. Ive looked in "Diagnostics Buffer" under Module Information and it says I have 10 errors, most relating to warm restarts and changing between Run, Startup, and Stop Thanks
DannyCook Posts: 11 Rating: (0)
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4/3/2014 4:05 PM	Rate (0)
Ste39 Posts: 4620 Rating: (710)	Hi DannyCook, You can send your diagnostic buffer?
Ste39 Posts: 4620 Rating: (710)	Last edited by: Ste39 at: 4/3/2014 4:21 PM Last edited by: Ste39 at: 4/3/2014 4:19 PM
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4/3/2014 4:16 PM	Rate (0)
DannyCook Posts: 11 Rating: (0)	Yes its attached Attachment Diagnose.zip (279 Downloads)
DannyCook Posts: 11 Rating: (0)
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4/3/2014 4:24 PM	Rate (0)
Ste39 Posts: 4620 Rating: (710)	Hi DannyCook, Try to see if you have in your program one SFB 20 STOP.
Ste39 Posts: 4620 Rating: (710)
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4/3/2014 4:28 PM	Rate (0)
Wizard Diamond Member Joined: 4/24/2006 Last visit: 12/24/2025 Posts: 9097 Rating: (1202)	Hello DannyCook, When you put CPU in STOP, you will get more in Diagnostic buffer Best regards, Wizard

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4/3/2014 4:48 PM	Rate (0)
DannyCook Posts: 11 Rating: (0)	Hey Ste, I cant seem to find a block called that. Any ideas about it? The help says it might be the PC/PG? Hey Wizard, Yeah, in stop I have 41 but they are mainly just the same (but a lot more of them) and a few about the memory. Attachment Diagnose (2).zip (327 Downloads)
DannyCook Posts: 11 Rating: (0)
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4/3/2014 8:42 PM	Rate (0)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	Hello, Let's go to the start. What PLC (6ES7--------) you have there? Is there anything connected to the Bus ? If yes, it's that another CPU or what? Clear diagnostics and when CPU stops read diagnostics before trying to start CPU with or without PG. Last thing, you can attach your program for us to evaluate. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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8/2/2017 8:19 AM	Rate (0)
Jen_Moderator Posts: 8171 Rating: (174)	New question published by Gujaa is split to a separate thread with the subject How can fix Error SFB20?. Best regards Jen_Moderator
Jen_Moderator Posts: 8171 Rating: (174)
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