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S7-1200 SD cards for datalogs

Created by: AlesPoljakNOJP at: 7/21/2015 5:42 PM (4 Replies)

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7/21/2015 5:42 PM	Rate (0)
AlesPoljakNOJP Experienced Member Joined: 8/25/2014 Last visit: 1/25/2023 Posts: 120 Rating: (0)	Hello all. I've noticed today that there are bigger (in capacity)SD cards for S7-1XXX CPU's avaliable. Are these cards compatible with S7-1200 CPU's and can they be used to store datalogs on them? These are the cards: 6ES7954-8LL02-0AA0, 6ES7954-8LP01-0AA0 The price of these cards... no comment! Cheers Aleix ---------------------------------------------------------------------------------------------------- Split from Sample program: S7-1200 and DATA LOG.
	Last edited by: Min_Moderator at: 7/23/2015 11:10:35 AM New subject after splitting
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7/21/2015 5:51 PM	Rate (0)
William_B Posts: 5225 Rating: (1165)	Poljo77 Hello all. I've noticed today that there are bigger (in capacity)SD cards for S7-1XXX CPU's avaliable. Are these cards compatible with S7-1200 CPU's and can they be used to store datalogs on them? These are the cards: 6ES7954-8LL02-0AA0, 6ES7954-8LP01-0AA0 The price of these cards... no comment! Cheers Aleix Careful... there is an upper limit see this quote from the System Manual: S7-1200 Programmable controller, System Manual, 01/2015, A5E02486680-AH, page 436 Maximum size rule for Data log files The maximum size of one data log file cannot exceed the free load memory size or 500 megabytes, whichever is smaller. The size of 500 megabytes in this case refers to the decimal definition of megabyte, such that the maximum data log file size is 500,000,000 bytes or 500 x 10002 bytes. Also.. S7-1200 Programmable controller, System Manual, 01/2015, A5E02486680-AH, page 438 Time stamp bytes in one data record ● No time stamp = 0 bytes ● Time stamp = 20 bytes
William_B Posts: 5225 Rating: (1165)	Last edited by: William_B at: 7/21/2015 5:54:02 PM
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7/21/2015 6:50 PM	Rate (0)
AlesPoljakNOJP Experienced Member Joined: 8/25/2014 Last visit: 1/25/2023 Posts: 120 Rating: (0)	Thank you for your reply. So the new cards that I found can be used for datalogging, you just have to watch that one datalog ins't bigger than 500Mb? Cheers.

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7/21/2015 10:30 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/20/2023 Posts: 13192 Rating: (2146)	For the S7-1200, it will be much smaller than 500 MB for most if not all available s7-1200 PLCs at this time. Read the quoted item: Maximum size rule for Data log files The maximum size of one data log file cannot exceed the free load memory size or 500 megabytes, whichever is smaller. Check your free load memory for the PLC you are using. That will be your maximum log size, unless you are lucky and it is more than 500 MB of free load memory. Most S7-1200's will not have that as an option. Poljo77or Thank you for your reply. So the new cards that I found can be used for datalogging, you just have to watch that one datalog ins't bigger than 500Mb? Cheers.
	science guy
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This contribution was helpful to 1 thankful Users William_B

12/22/2016 12:45 PM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4827 Rating: (123)	New question published by jeffron is split to a separate thread with the subject MMC Card, how can i save the program block inside it. Best regards Min_Moderator

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