9/17/2023 10:11 AM | |
Joined: 3/7/2023 Last visit: 1/17/2024 Posts: 4 Rating:
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The PLC is an S7-400H (CPU-417-5H PN/DP) redundant system. The system has been working well in the past. However, today, when I turned the power on, the system did not start operating. Even after turning the power off and on again, the system still did not function. I had to press the Reset using the MRES on the CPU module, and only then did the PLC start operating normally. Upon examining the diagnostic buffer, it revealed a CPU STOP due to an I/O Error. The summarized event message is as follows: [snip] Afterward, I attempted several power ON/OFF cycles, but I could no longer replicate the same issue. Even after reading related articles on this site, I have been unable to find a precise solution. I am seeking assistance and would greatly appreciate a helpful response. AttachmentDiagnostic_Buffer.txt (546 Downloads) |
Last edited by: Jen_Moderator at: 09/18/2023 10:53:20Diagnostic buffer added as .txt file. |
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9/19/2023 6:49 AM | |
Joined: 3/7/2023 Last visit: 1/17/2024 Posts: 4 Rating:
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Hello Mr. Ayman Elotaify, For your reference, I have attached module data sheets for the CPU, Power Module, Memory Card, and Backup Battery. AttachmentModule Data Sheet.pdf (543 Downloads) |
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