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Yesterday one of my PLC network was Down ,status is BUS Fault

7/18/2012 1:43 PM	Rate (0)
Import-User-1 Posts: 3609 Rating: (29)	Import of a Technical Question of the User choudari choudari Helow sir, we are simocde modules reported to my PLC (S7-417 4DP). Yesterday one of my PLC network was Down ,status is BUS Fault. I checked in diagnostics , event logged as 16#39B1 & 16 # 253A can you guide me towards solution
Import-User-1 Posts: 3609 Rating: (29)
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7/20/2012 11:16 AM	Rate (0)
Jazz_M Posts: 1121 Rating: (86)	Hi What does the Help say about this event. Can you upload your Diagnsotic buffer. Have fun...
Jazz_M Posts: 1121 Rating: (86)
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7/20/2012 11:26 AM	Rate (0)
umencho Grandmaster Joined: 3/21/2006 Last visit: 1/10/2026 Posts: 10247 Rating: (1183)	Hello, The first event mean: ... Event ID 16# 39B1 I/O access error when updating the process image input table P area, double-word access, access address: xxx This is correct as address xxx should be part of lost Profibus address. The other one Event 16#253A should be something like "Area error when writing..." and is not related to BUSF. It should be 'old' orcontinuouslyexisting there. Best regards, Hristo Mihalev

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7/21/2012 1:46 AM	Rate (0)
H-H Platinum Member Joined: 7/2/2008 Last visit: 12/21/2025 Posts: 929 Rating: (309)	Hello, Yes the diagnostic buffer will help and one more thing. Open hardware configuration and in station menu, click open station online. This should give you an online view for the whole network (SIMOCODEs) you have. Check which Profibus slave has a red X or red \. Best regards, H-H

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