6/25/2013 6:29 PM | |||||
Joined: 11/8/2011 Last visit: 8/21/2024 Posts: 387 Rating: (43) |
Hi, Which CPU do u have??? and r u upgrading the latest firmware??? Affected CPU
Operating System Updates: CPU412-3H / CPU414-4H / CPU414-4H PG / CPU417-4H as well as CPU412-5H PN/DP, CPU414-5H PN/DP, CPU416-5H PN/DP, CPU417-5H PN/DP |
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6/25/2013 8:49 PM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365)
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Hello, Check the following link for one possible reason for listed CPUs. Variables Monitoring with H CPUs V4.5.0 Best regards Hamid Hosseini |
This contribution was helpful to2 thankful Users |
6/26/2013 1:03 PM | |
Joined: 7/2/2008 Last visit: 8/26/2024 Posts: 928 Rating: (308)
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Hellovipz,
Except the very defined case inhdhosseini's link, It is very hard to give you one logical reason. If you could send your CPU to Siemens in Germany for investigation, Maybethey will know why. Did you check the diagnotic buffer on the healthy CPU. From my experience with H system, it's a common case to lose firmware on one or two of the CPU's after a sudden power cycle. In my last project I had to install the new V6 H CPUs on an ungrounded 220VAC without isolation transformer and UPS. All of a sudden I've lost one CPU, even a firmware update didn't help. I got a new CPU and installed it. worked fine for several hours then all of a sudden one or two of the CPUs had all LEDs blinking. Reset, download, worked fine for several hours then all of a sudden again all LEDs blinking. I had a doubt with the 220VAC supply, installed a 220VAC true online double conversion UPS and the CPUs never failed again 24/7. Best regards. H-H
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This contribution was helpful to7 thankful Users |
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