3/11/2015 9:16 AM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365)
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Hello, In S7-400 to keep data secure against power loss, you should use Falsh memory card as external memory.This is recommended for normal operation with difficulty of downloading the changes to Flash card while CPU in STOP. When using RAM external memories are recommended during commissioning and using Back up battery is essential to keep blocks live in CPU's load and work memories.Read more here: Program blocks and data blocks at POWER OFF/ON with/without buffer battery and here more on memory cards that are used with S7-400: https://support.industry.siemens.com/cs/document/73159687?lc=en-DE I hope this helps, Hamid Hosseini |
Last edited by: hdhosseini at: 3/11/2015 9:20:32 AM |
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3/11/2015 10:22 AM | |
Posts: 5 Rating: (0) |
Thank you much for your information. |
3/11/2015 12:13 PM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365)
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Your phrases are all correct.
Read more here: How can I get an overview of the S7-400 memory concept? |
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