1/5/2016 2:30 AM | |
Joined: 2/5/2015 Last visit: 2/8/2023 Posts: 12 Rating: (0) |
Hi, I am having a problem with a running s7-400. Whilst in run mode all the lights on the 414-2 start to flash and i can not connect via step 7 software to check the fault. I have performed a power cycle and the PLC is now ok. I have connected and saved the diagnostics file which is attached. Can somebody point me in the right direction on why this fault occurs? - Event 25 in the diagnostic file mentions "No Voltage" so I have tested the mains and the voltage seems ok with no interuptions or spikes. "OB84 not found" is also mention, I have read that this OB supplies more information on this type of fault. Would this help? Maybe that is my next step? Many Thanks for any assistance. AttachmentDiagnose 221215.txt (398 Downloads) |
1/5/2016 7:21 AM | |
Joined: 3/21/2006 Last visit: 10/7/2024 Posts: 10229 Rating: (1181) |
Hello, You can ask in Support Request. From my experience in order do not have troubles in the future replace the CPU. At the moment just with POWER ON/OFF you fix the CPU, after time it will need also to unplug and plug in the rack in order to fix...Here in the forum have a lot of discussions about the same issue with no clear solution. Someone mentioned about firmware update but... Best regards, Hristo MIhalev |
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