2/1/2018 2:55 PM | |
Posts: 2 Rating:
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Hello, We have one PLC with CPU 414-2 and don't work the bakup sytem, Always switch off the main power all program lost. I tested with a batteries connected directly in the front jack for the CPU, and have a same problem. So I opened the CPU and I not know witch memories is for the program backup, Is the 7 memories in the botom for the board? "K4M28163LH" . Anyone know what tension they should have about these memories with normal power and after switch off? Please anyone know the component 454AB small CI with 6 pins. does anyone know the component. Thanks Carlos S. Oechsler ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 2/1/2018 3:05:16 PMNew subject after splitting Last edited by: oechsler at: 2/1/2018 6:12:28 PM |
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2/1/2018 6:31 PM | |
Joined: 1/21/2013 Last visit: 6/6/2024 Posts: 4620 Rating:
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Hello, perhaps you have a RAM installed on the bay of the CPU? Which memory cards can you use with a S7-400 CPU? - ID: 73159687 ... there is a rectangular blue below is for S7 300 on the left you see the same in S7 400 (outside) it is longer (inside) |
Last edited by: Ste39 at: 2/1/2018 6:36:22 PMLast edited by: Ste39 at: 2/1/2018 6:37:29 PMLast edited by: Jen_Moderator at: 2/2/2018 7:12:15 AMInserted righ links. |
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4/15/2021 1:43 PM | |
Joined: 9/27/2006 Last visit: 8/14/2024 Posts: 12277 Rating:
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Hello oeschler; One question that comes to mind is: how dod you transfer the program to your flash card? A simple download only works with RAM memory. For a Flash memoru card, you must put the CPU in Stop mode. And use the Step 7 menu command "Load user program to memory card". https://support.industry.siemens.com/cs/ww/en/view/23670531 If you choose to follow Marcjan's excellent suggestion to test your power supply module, you can provide external battery support to the PLC using a jack connector (we purchased a standard audio jack) on the bottom of the CPU, connected to a 9V battery. At least this is how we used this in the olden days... this allowed us to remove the CPU from the rack without loosing the RAM memory. Recently, Siemens offers a dedicated jack for this purpose: https://support.industry.siemens.com/cs/us/en/view/24525963 Hope this helps, |
Last edited by: dchartier at: 04/15/2021 13:53:32 |
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4/15/2021 3:59 PM | |
Joined: 7/16/2018 Last visit: 7/24/2024 Posts: 9 Rating:
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Do You remember how long cpu's waking to be ready if program is onboard? Now it takes 10 min, and i thing the cpu uploading the program from other redudant. In case when everything is ok, its the same time or shorter? Regards Bart |
Last edited by: Bartolomeo at: 04/15/2021 16:58:43 |
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