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Simatic S7 300 all modifications deleted when PLC resetted

4/11/2013 9:46 AM	Rate (0)
cuman Posts: 5 Rating: (0)	In Simatic S7 300 when i do a modification(changes in the program) to a current programme and download it to the PLC. It works properly but when the PLC is resetted all my changes are gone and programme turns back to its original codes. What should i do in order to keep my changes forever even if PLC is resetted and electricity cutted off?
cuman Posts: 5 Rating: (0)
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4/11/2013 10:01 AM	Rate (0)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	Hello, Is this 300 an older type with the big blue Flash Memory card and battery? If yes, load new program on that memory card. If no, then please give us the complete partnumber of your CPU. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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4/11/2013 5:17 PM	Rate (0)
cuman Posts: 5 Rating: (0)	CPU 318-2 and it has 512 kB RAM on it.
cuman Posts: 5 Rating: (0)
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4/11/2013 5:39 PM	Rate (0)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	Hello, That's an oldy with a flash memory card (option). If that card is inserted, the CPU loads the program from that card into it's memory at startup. The changes you made must be on that card too! Use load user progam to memory card function in the PLC-Tab. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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4/12/2013 7:55 AM	Rate (0)
cuman Posts: 5 Rating: (0)	Thank You very much Dear Marcjan !
cuman Posts: 5 Rating: (0)
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This contribution was helpful to 1 thankful Users Marcjan

4/29/2013 3:55 AM	Rate (0)
H.SAPER Bronze Member Joined: 11/12/2008 Last visit: 9/9/2025 Posts: 225 Rating: (16)	Hi, if your project is editible during runtime and you lose some parameters after blackout, may you need to retantive your memory and DBs through CPU properties on HW configuration. just suggestion
	HASSAN.S POJAILA
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