5/31/2019 7:53 AM | |
Joined: 12/9/2010 Last visit: 10/8/2022 Posts: 623 Rating: (77) |
Hi ANTONIO7765, 1. You should replace the broken batteries. If knob is at no battery, there will be no backup available to PLC program. Thus it vanished. (Memory card will be RAM type.) 2. Copy RAM to ROM is applicable only if memory card is EEPROM. Please confirm. CPU should be in stop mode while 'Copy RAM to ROM' is being carried out. |
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This contribution was helpful to1 thankful Users |
5/31/2019 9:38 PM | |
Joined: 9/27/2006 Last visit: 10/12/2024 Posts: 12287 Rating: (2685)
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Hello Antonio; If you want to know if any damage will occur to your CPU if you operate without battery support (and you have a RAM card as load memory), you will have no effect on the PLC functionnality until you remove or lose power to the PS 407. Then you will lose your program and have to download it from your programming PC when you restart. These FAQ links will help you organize your thoughts on the S7-400 Load Memory, which holds and retains download the program and configurations for the CPU: How can I get an overview of the S7-400 memory concept? https://support.industry.siemens.com/cs/us/en/view/7302549 Which memory cards can you use with a S7-400 CPU? https://support.industry.siemens.com/cs/us/en/view/73159687 Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 06/01/2019 23:25:17 |
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6/1/2019 12:15 AM | |
Joined: 3/28/2016 Last visit: 5/20/2024 Posts: 26 Rating: (0) |
Thank you all for your kind answers. I'll follow your suggest, let you know how it goes. Best regards. |
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