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Can I write with a OPC-server program and data blocks on flash card

Created by: gre_m at: 10/27/2009 8:30 PM (3 Replies)

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10/27/2009 8:30 PM	Rate (0)
gre_m Posts: 947 Rating: (45)	I can read and write by OPC server program and data blocksfrom memory. Can I write with a OPC-server program and data blocks on Flash-card S7-400?
gre_m Posts: 947 Rating: (45)
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10/27/2009 9:36 PM	Rate (0)
Darius Platinum Member Joined: 9/28/2005 Last visit: 12/9/2025 Posts: 2957 Rating: (243)	Hi, OPC is just communication driver. If I'm not wrong than I can say that actual data of data blocks for PLCs with flash memory card resides on work memory, not on flash. I think it is not possible to write directly to flash by using OPC (or any other driver from SCADA). PLC program itself also stores actual values on work memory and do not write to flash.
	Best regards, Darius
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10/28/2009 6:05 PM	Rate (0)
gre_m Posts: 947 Rating: (45)	I think similarly, but Step7 once wrote into flash. And this is only possible through the menu. It may still be possible through a software interface (under control Visual Basic)?
gre_m Posts: 947 Rating: (45)
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10/28/2009 6:36 PM	Rate (0)
Darius Platinum Member Joined: 9/28/2005 Last visit: 12/9/2025 Posts: 2957 Rating: (243)	Hi, I don't think its possible to write actual values into flash even with Step-7. Step-7 writes program, data blocks and system data to flash and I don't thinks its possible to do with any available drivers.
	Best regards, Darius
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