4/17/2018 3:42 PM | |
Joined: 9/27/2006 Last visit: 10/12/2024 Posts: 12287 Rating: (2685)
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Hello Paycheck; Just a few thoughts: - if the memory card has failed, then most likely the CPU will warn you by flashing all LEDs on the controller, which is not the case here. - you are using a 256 kB Flash memory card, which could be too small to hold your program with modifications. Have you established how many bytes are written to the Flash memory (in the CPU properties, inside the Memory tab)? Try removing the memory card (so you operate only on the integrated RAM of the CPU), and load only the hardware configuration. You should be able to connect to the PLC. Re-insert the memory card (without power) and see if you can download the progrm to it. Use the following procedure (just to make sure you are using the right functions): How can you write the program to the FLASH Memory Card when using a SIMATIC S7-400 CPU? https://support.industry.siemens.com/cs/us/en/view/23670531 Hope this helps, Daniel Chartier |
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