1/10/2013 6:50 PM | |
Joined: 9/27/2006 Last visit: 9/22/2024 Posts: 12282 Rating: (2685) |
Hello Barry; The memory cards available for the S7-400 are described in the following FAQ, and the insertedquote is most important: How can I get an overview of the S7-400 memory concept? When using a RAM memory card, the system must be battery-operated so as to back up the RAM memory card data and the data in the internal RAM if there is a power failure. Hope this helps, |
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1/10/2013 7:42 PM | |
Joined: 9/27/2006 Last visit: 9/22/2024 Posts: 12282 Rating: (2685) |
Hello Barry; It is possible also hat the client omitted to "depassivate" the batteries before replacement. The step is recommended in the battery documentation. Batteries that do not undergo depassivation will not operate properly. See the following link for a discussion on the subject. /tf/WW/en/Posts/72906 Hope this helps, Daniel Chartier Edit: Please reference pages 6.16 and 7.3 in the following manual for more information on depassivation of backup batteries: Automation System S7-400 Hardware and Installation D.C. |
Last edited by: dchartier at: 1/30/2013 9:42 PMAdded link to the S7-400 Hardware manual |
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8/16/2013 8:25 AM | |
Joined: 9/2/2012 Last visit: 8/15/2024 Posts: 711 Rating: (30) |
HaiMarcjan, 1. if am having RAM card (s7 400), while downloading it will go to cpu internal memory.once it become full, program will get download in to RAM card. CORRECT ?? 2. if am having flash card , while downloading it will go to cpu internal memory only. To transfer in to FLASH card,save to memory card should use. so my doubt is, a. am having 400 system with flash card b. am trying to download with out inserting FLASH card, then i will get errror that no enough memory. all blocks will not get downloaded. c. am trying the same ( normal download, notsave to memory card) after inserting FLASH card, then its getting downloaded properly . then what does it mean ? why its happening like this ??\ any comment will be very helpful. i couldnt solve my doubt with MEMORY CONCEPT FAQ. regards vipz |
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11/3/2013 1:29 AM | |
Joined: 10/8/2008 Last visit: 9/12/2024 Posts: 9 Rating: (0) |
Hello Marcjan, will the Copy RAM to ROM function alsobackup de MWxxxx contents? best regards, Justino. |
11/4/2013 10:09 AM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hi justino, The function copy RAM to ROM is not supported in S7-400. read at the bottom: What is the effect of the STEP 7 function "Copy RAM to ROM"? |
Last edited by: Ste39 at: 11/4/2013 10:12 AM |
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11/4/2013 4:54 PM | |
Joined: 10/8/2008 Last visit: 9/12/2024 Posts: 9 Rating: (0) |
Ok, thank you. Is there any way to save in flash or PG the contents of MWxxxx memory? regards Justino. |
11/5/2013 10:28 AM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hi Justino, Take a look: How can you back up the actual values of DBs and markers? |
This contribution was helpful to1 thankful Users |
10/1/2015 5:43 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123) |
New question published by urban99 is split to a separate thread with the subject S7 400, power off/on question. Best regards |
10/14/2015 2:29 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123) |
New question published by pazig is split to a separate thread with the subject s7-400, storing Program in RAM or ROM?. Best regards |
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