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Storage data in PLC S7-1200

Created by: bathoi at: 12/18/2011 2:01 PM (21 Replies)

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12/18/2011 2:01 PM	Rate (0)
bathoi Posts: 28 Rating: (0)	In S7-200 i easy to storage a value in memory and it doesn't remove when i cut power. In S7-1200: Example: I move a value (10.0) into MD100, and it have nothing when i cut power Help me please!
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12/18/2011 4:05 PM	Rate (1)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 9/10/2024 Posts: 10228 Rating: (1181)	Hello, Take a look at CPU memory what are possibilities to set a retentive area in S7-1200 CPU. There have some limitations... best regards, Hristo Mihalev

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12/19/2011 3:04 AM	Rate (0)
bathoi Posts: 28 Rating: (0)	How can i storage my value in retentive memory?
bathoi Posts: 28 Rating: (0)
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12/19/2011 3:28 AM	Rate (0)
Ganes10 Platinum Member Joined: 8/31/2010 Last visit: 9/16/2024 Posts: 1521 Rating: (227)	Either you can use data block instead of marker memory... Or use marker memory but it should be within the retentive range which is being defined in the CPU configuration...
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12/19/2011 5:18 AM	Rate (0)
bathoi Posts: 28 Rating: (0)	I try to set retain in PLC tag, and it ok (success) but it limit on MB0 to MB 1448 byte. I want to storage with big memory. Example 5000byte? in S7-200, data memory of CPU 224 is 8192 byte, it bigger than CPU S7-1200 (2048 byte retentive area) how can i sotrage with 5000 byte, or 1MB ? thank for your help
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12/19/2011 7:37 AM	Rate (0)
Ganes10 Platinum Member Joined: 8/31/2010 Last visit: 9/16/2024 Posts: 1521 Rating: (227)	A total of 2048 bytes of data can be retentive in S7-1200 CPU. Not more than that
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12/19/2011 8:03 AM	Rate (0)
bathoi Posts: 28 Rating: (0)	In S7-200 i can storage 8000 byte have any way for me to storage more 2048 byte in S7-1200? thank?
bathoi Posts: 28 Rating: (0)
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12/19/2011 12:34 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 9/12/2024 Posts: 15180 Rating: (2417)	bathoi In S7-200 i can storage 8000 byte have any way for me to storage more 2048 byte in S7-1200? thank? Use a storage card in the memory slot. Sadly, you cannot remove the card while the PLC program is running, or it halts the PLC if I remember correctly.
	science guy
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12/19/2011 2:05 PM	Rate (0)
Ganes10 Platinum Member Joined: 8/31/2010 Last visit: 9/16/2024 Posts: 1521 Rating: (227)	bathoi In S7-200 i can storage 8000 byte have any way for me to storage more 2048 byte in S7-1200? Unlike S7-200 where super cap is used to retain whereas in S7-1200 it stores retained data in internal flash memory. SIMATIC Memory Card will not be helpful in increasing the retentive memory except the load memory. The 2048 byte total is shared between M and DB memory
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12/20/2011 2:13 AM	Rate (0)
bathoi Posts: 28 Rating: (0)	It is impossible mission.? i have big mistake when i chose S7-1200 to replace for S7-200. poor me
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