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cpu 315-2DP only SF LED Flashing.

Created by: yurim at: 9/3/2009 11:32 AM (7 Replies)

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9/3/2009 11:32 AM	Rate (0)
yurim Posts: 2 Rating: (0)	Dear Engineer! Hello. Simatic S7 315-2DP Problem. CPU Status: SF (Flashing 0.5Hz) Force(Dark) RUN(Dark) Stop(Dark) BF(Dark) What's the problem? plase Help me. Attachment CPU315.gif (448 Downloads)
yurim Posts: 2 Rating: (0)	Last edited by: yurim at: 9/3/2009 11:36 AM
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9/3/2009 1:27 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 10/7/2024 Posts: 10229 Rating: (1181)	Hello, And when you connected to the CPU, did you check what does write in Diagnostic Buffer? (Right click on CPU, select PLC - Module Information (Ctrl+D). Go on Diagnostic Buffer. Make screenshot and attach here... Regards

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9/4/2009 7:58 PM	Rate (0)
jklm Platinum Member Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309)	Hello, Did you try a CPU memory reset by means of mode selector switch? The CPU indicates a request to memory reset by the STOP LED flashing at 0.5 Hz intervals. A memory reset is required when the SIMATIC MMC has been replaced (or inserted the firts time). Steps to go as from the manual: 1. Place the selector to STOP position ①. 2. Push the selector to MRES position. Hold the selector in this position until the STOP LED lights up for the second time and remains on (this takes 3 seconds). ② Now release the selector. 3. You must push the selector to MRES position again within 3 seconds and hold it there until the STOP LED flashes (at 2 Hz). ③ You can now release the selector switch. When the CPU has completed memory reset, the STOP LED stops flashing and remains lit. The CPU has reset the memory. If you are not able to reset the memory, it might be that the MMC is not formated as required. From the manual: How to format your SIMATIC Micro Memory Card: If the CPU has requested a memory reset (STOP LED flashing slowly) you can format the SIMATIC MMC using the mode selector switch as described below: 1. Toggle the switch to the MRES position and hold it there until the STOP LED lights up and remains on (after approx. 9 seconds). 2. Within the next three seconds, release the switch and toggle it once again to MRES position. The STOP LED flashes to indicate that formatting is in progress. Hope it helps
	Best regards jklm Suggestion was helpful? Feel free to rate it.
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9/8/2009 2:58 AM	Rate (0)
yurim Posts: 2 Rating: (0)	Thank you sir. But i'mcan not anything. all Stop, and can not connect online. i'm attachment avi file. please view movie. Attachment Umile090908_001.zip (514 Downloads)
yurim Posts: 2 Rating: (0)
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9/10/2009 2:48 PM	Rate (0)
hannibar Posts: 52 Rating: (8)	yurim, Updateyour cpu's firmware,I fixed one that like yours. https://support.automation.siemens.com/CN/llisapi.dll/16750732?func=ll&objId=16750732&objAction=csView&nodeid0=10805045&lang=en&siteid=cseus&aktprim=0&extranet=standard&viewreg=CN&load=content&csQuery0=315&subtype=133100 regards, Hannibar
hannibar Posts: 52 Rating: (8)
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2/2/2012 7:08 AM	Rate (0)
SK(2*A) Posts: 140 Rating: (0)	Hi there, Have you solved this problem? I am facing a similiar issue but unable to solve :( Thanks! Please respond!
SK(2*A) Posts: 140 Rating: (0)
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2/3/2012 4:45 PM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Hello, I would recommend to you, if you have such a problem and it is persists even if the SIMATIC MMC is empty and the PLC is reset, to contact your local Repair Center to get the CPU checked. Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
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9/29/2016 4:20 PM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123)	New question published by vigneshranganathan is split to a separate thread with the subject CPU315-2DP Redundancy SF BF fault. Best regards Min_Moderator

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