5/3/2017 2:52 PM | |
Joined: 7/14/2016 Last visit: 6/27/2024 Posts: 387 Rating: (27) |
Hello all, I had a sudden breakdown in a new 400-H system installed some days before. There was a fault in synch module or optical cable and due to that CPU memory was reset. How can this be possible? I am not new to S7400 and I have seen this first time. Please find attached file for diagnostic buffer. Fault occurred at night and no one was present at site (Events 1 to 10). Problem may be started in the da7 (Event 11). But question is Why CPU memory was reset? And fault finding was not easy at all. there was no way to tell which synch module or cable is faulty. Can any one tell me from diagnostic buffer what's going on? Thanks, Kbv. Attachmentdiag.txt (374 Downloads) |
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5/3/2017 3:05 PM | |
Joined: 3/5/2014 Last visit: 8/5/2022 Posts: 5521 Rating: (1054) |
hi Kbv, the CPU don´t know the error at all. Event 9: Submodule affected: Lower SYNC submodule (IFM2F) I would ask Siemens directly. Open a Support Request hope this helps, regards, |
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5/3/2017 3:22 PM | |
Joined: 9/27/2006 Last visit: 9/19/2024 Posts: 12282 Rating: (2684)
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Hello Kbv; This thread is 10 years old, and concerns the memory reset of another model of CPU, but maybe it can provide bit of clarification: https://support.industry.siemens.com/tf/WW/en/posts/cpu-lost-user-program/8895?page=0&pageSize=10 There is no direct mention of "DEFECTIVE" state in your diagnistic buffer messages, but internal inconsistencies in your program "(SDBs less than 200 incomplete, superfluous, or incorrect)" and a refusal to CONNECT due to discrepancies in the internal structure of the AS indicate a catastrophic memory disturbance. I would recommend you send this information to Siemens Support, using the Support Request.link at the top of this page. There might be an issue of physical damage to your CPU. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 5/3/2017 3:22:48 PMLast edited by: dchartier at: 5/3/2017 3:27:03 PM |
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