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Problem with CPU 314 and MC Flash

Created by: Potemkin at: 6/7/2021 2:52 PM (3 Replies)

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6/7/2021 2:52 PM	Rate (0)
Potemkin Member Joined: 7/17/2017 Last visit: 2/8/2023 Posts: 5 Rating: (0)	Hello! After power fault, CPU going in STOP mode and requesting MRES. How can I doing MRES and don't miss the program on MC Flash. If I removing MC from CPU and doing MRES CPU is OK, but then i insert MC and STOP LED blink (request MRES). Is it correct If i just copy all blocks from MC to PG and after MRES download them to PLC? CPU 314 (6es7 314-1ae02-0ab0) MC Flash (6es7 951-0ke00-0aa0)

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6/7/2021 6:24 PM	Rate (0)
Mambo_Tech Silver Member Joined: 1/28/2014 Last visit: 10/31/2024 Posts: 90 Rating: (20)	Hi Potemkin, If MRES is done, all content of MMC wil be erased. MRES requesting is due to invalid data on MMC. You can check this https://support.industry.siemens.com/cs/bo/es/view/29801950 to know about MRES and invalid data. If your MMC contain invalid data, most likely you can't copy blocks to PG, but you can try. Regards, Mambo_Tech
	If you find the information useful, I would appreciate your rating
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6/8/2021 9:31 AM	Rate (0)
Potemkin Member Joined: 7/17/2017 Last visit: 2/8/2023 Posts: 5 Rating: (0)	Mambo_Tech Hi Potemkin, If MRES is done, all content of MMC wil be erased. MRES requesting is due to invalid data on MMC. You can check this https://support.industry.siemens.com/cs/bo/es/view/29801950 to know about MRES and invalid data. If your MMC contain invalid data, most likely you can't copy blocks to PG, but you can try. Regards, Mambo_Tech Its not MMC, MC Flash. The data on MC is correct, i can copy it at PG. I need to know-is it enough to copy all the blocks to reset the memory? Attachment IMG_5713.JPG (328 Downloads)

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6/8/2021 2:03 PM	Rate (0)
mopS04 Platinum Expert Joined: 3/5/2014 Last visit: 8/5/2022 Posts: 5521 Rating: (1054)	hi Potemkin, I would do it the way you suggested. Copy the blocks from the PLC to your offline- project to have an actual back-up. Then fix the card-problem. Maybe this FAQ can help: How can you obtain an overview of the memory concept of SIMATIC S7-300 CPUs and C7 devices? hope this helps, regards,
	FCK WAR! Be nice!
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