11/29/2016 1:15 PM | |
Joined: 10/5/2016 Last visit: 9/12/2022 Posts: 236 Rating: (7) |
Dear forum participants, I use CPU315 2DP. I need to save my current retentive data of M and DB after downloading new program. I read the article about backing up DB and Memory area: and about writing RAM to ROM: https://support.industry.siemens.com/cs/document/15389520/what-is-the-effect-of-the-step-7-function-copy-ram-to-rom-?dti=0&lc=en-WW But I need to save current online data to non-volatile memory, for example, maybe for some system bit, without any preparation. Which methods are avaliable to save retained DB and M-area current data after downloading a new program to the PLC? How to move some DB or M-data (selectively, not all RAM content) to the Load memory and then after downloading take it back ? |
Last edited by: KCD at: 11/29/2016 2:11:40 PM |
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11/29/2016 1:48 PM | |
Joined: 10/5/2016 Last visit: 9/12/2022 Posts: 236 Rating: (7) |
Thank youRonaldo Junior, I use Step 7 LAD/FBD/STL. What functions are avaliable for it? Could you describe in detail your mentioned method of saving, please? |
Last edited by: KCD at: 11/29/2016 1:49:52 PMLast edited by: KCD at: 11/29/2016 1:54:11 PMLast edited by: KCD at: 11/29/2016 1:54:34 PM |
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11/30/2016 10:13 AM | |
Joined: 10/5/2016 Last visit: 9/12/2022 Posts: 236 Rating: (7) |
Hi Sachinpatke, Oh, for example, I have next object : PLC+WinCC. Operator makes some changes to DB (to PLC from PC) and saves them. I want automatically save them (in Load memory for example) in order not to fail them after downloading new changes to the program. I want in case I forget to drag and drop online DB to offline DB with current values of them to do it somehow automatically. |
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