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all led's blinking of cpu 414-2

Created by: AutoGen_5173221 at: 3/18/2024 8:12 AM (3 Replies)

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3/18/2024 8:12 AM	Rate (0)
AutoGen_5173221 Posts: 5 Rating: (0)	We have a CPU 414-2. When we start it after a day of shutdown, all its indicators flash. After turning off the power supply, the CPU turn to stop mode. Upon turning the power supply back on, the CPU switches to run mode, and everything returns to normal. However, after some time, the issue recurs. This pattern repeats every one or two days after each shutdown. I would greatly appreciate your valuable suggestions on this. Attachment Diagnose.txt (605 Downloads)
AutoGen_5173221 Posts: 5 Rating: (0)	Last edited by: U_e508e55a-b5aa-4682-89b6-12bb4c83b92d at: 03/18/2024 08:19:45
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3/18/2024 11:47 AM	Rate (1)
Hazard_7 Advanced Member Joined: 5/30/2022 Last visit: 11/19/2024 Posts: 599 Rating: (97)	Hi AutoGen_5173221, Can you attach a picture of the LEDS? I would say you should add an OB82 to your program, see page 82 of the following manual: [snip] Attachment S7pr___b.pdf (667 Downloads)
	Last edited by: The Helping Hand at: 03/18/2024 15:11:22 File attached from link If this information really helps, you could use the Rate function. Best Regards.
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3/19/2024 8:23 AM	Rate (0)
AutoGen_5173221 Posts: 5 Rating: (0)	The condition has worsened, with this fault occurring every 15 to 20 minutes during operation. To address this issue, we replaced the CPU, which has now resolved the issue and returned operations to normal. However, I am still pondering why this problem occurred. Is there a power supply issue (ps 405) that damaging the CPU, considering that this cpu was changed not long ago. Attachment cpu image.jpeg (391 Downloads)
AutoGen_5173221 Posts: 5 Rating: (0)
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4/15/2024 4:56 AM	Rate (0)
Deyoung Posts: 40 Rating: (1)	AutoGen_5173221 We have a CPU 414-2. When we start it after a day of shutdown, all its indicators flash. After turning off the power supply, the CPU turn to stop mode. Upon turning the power supply back on, the CPU switches to run mode, and everything returns to normal. However, after some time, the issue recurs. This pattern repeats every one or two days after each shutdown. I would greatly appreciate your valuable suggestions on this. Hi Mate, Could you affirm why the CPU Diagnostic message time stamp in the past Are we having the right diagnostic messages? Cheers. Dyoung.
Deyoung Posts: 40 Rating: (1)
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