6/18/2013 9:40 PM | |
Joined: 6/8/2013 Last visit: 8/5/2024 Posts: 188 Rating: (1) |
hi,,,,thank u of your help |
6/20/2013 12:43 PM | |
Posts: 1064 Rating: (72) |
It should have no effect at all except to free up memory (fill in memory holes from edits) |
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6/24/2013 6:44 PM | |
Joined: 1/3/2006 Last visit: 2/19/2024 Posts: 726 Rating: (71) |
Hi Just to elaborate on whatcjustice said below is the excerpt from Step 7: The size of the work memory which can be used for logic blocks and data blocks can be altered by changing any of the following parameters:
You can have a look at attached file for more fun. AttachmentWork Memory.pdf (623 Downloads) |
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6/25/2013 7:42 AM | |
Joined: 9/2/2012 Last visit: 8/15/2024 Posts: 711 Rating: (30) |
Dearcjustice, can you please eleborate You process image area for the input and outputonly really needs to be as large as your max I/O address can you explain with some examples mentioning address range and corresponding process image size ?? regards Vipz
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6/25/2013 8:49 AM | |
Joined: 9/7/2007 Last visit: 8/30/2023 Posts: 550 Rating: (61) |
Hi vipz If the process image area for example 512 then if you have an PIW 1024 as an analog input it will not be read by the CPU.
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Best Regards |
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6/25/2013 9:13 AM | |
Posts: 1064 Rating: (72) |
the piw would have to be below 256 fo rit to be read |
6/25/2013 9:40 AM | |
Joined: 9/2/2012 Last visit: 8/15/2024 Posts: 711 Rating: (30) |
Dear playerslight, please find the attachment. screenshots are taken from uploaded backup from a running plc. adress used crossing the limit, but still its working ?? or its applicable for central rack only ?? regards vipz
AttachmentPROCES IMAGE.zip (273 Downloads) |
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6/25/2013 10:28 AM | |
Joined: 9/2/2012 Last visit: 8/15/2024 Posts: 711 Rating: (30) |
thank you all for the support.. regards vipz
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6/25/2013 10:37 AM | |
Posts: 1064 Rating: (72) |
You are welcome hope i helped |
6/25/2013 2:37 PM | |
Posts: 559 Rating: (87) |
You can incerease the Work Memory bu inserting RAM card for S7-400 CPUs. So please check it out if you really need it. |
6/25/2013 2:59 PM | |
Joined: 9/27/2006 Last visit: 9/22/2024 Posts: 12282 Rating: (2684)
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hello SolutionFinder; I am sorry but I must diagree with the statement above. Work memroy is not expandable, load memory can be increased using RAM or FEPROM modules. See the following text: SIMATIC S7-400 S7-400 Automation System, CPU Specifications Flexible memory space ● Work memory: The capacity of the work memory is determined by selecting the appropriate CPU from the graded range of CPUs.(Note: this translates to "the size of the work memory is fixed per CPU" D.C.). ● Load memory: The integrated load memory is sufficient for small and medium-sized programs. The load memory can be increased for larger programs by inserting the RAM memory card. Flash memory cards are also available to ensure that programs are retained in the event of a power failure even without a backup battery. Flash memory cards (8 MB or more) are also suitable for sending and carrying out operating system updates. Hope this helps, Daniel Chartier |
6/27/2013 1:56 PM | |||
Posts: 559 Rating: (87) |
Dear dchartier, Thanks a lot for your reply. Actually I was little bit confused with load memory & work memory. You had cleared my concept. Thanks a lot. |
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6/28/2013 10:12 AM | |
Joined: 10/7/2005 Last visit: 9/22/2024 Posts: 3021 Rating: (1054)
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Hello vipz have a look at the threadIncreasing PIP & PIQ vs. peripheral addressing which should answer all you questions on this matter (I hope). |
Cheers |
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7/26/2013 9:33 AM | |
Joined: 9/2/2012 Last visit: 8/15/2024 Posts: 711 Rating: (30) |
Hai , regards vipz
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