When attempting to download a Function Block (FC) to a Siemens PLC CPU315-2DP, we encountered an error message. What does this error signify, and how can we resolve it? Despite this issue, we are still able to connect online. Thank you. Error Message: 256:91 Error Description: The operation was canceled by the user. Solution and Prevention: You can proceed with using the program as usual.
Is there sufficient memory available on the controller? Is it equipped with password protection?
Not sure if this will be helpful, but you can find more information here: https://support.industry.siemens.co...ofessional-v5-5/78113/?page=0&pageSize=10#top. Regarding your image, it appears to be correct. To view it, open the CPU properties using the SIMATIC Manager, although you can only read them there. For editing, access the hardware configuration (hwconfig) and double-click on the CPU 315 to open the properties dialog, where you can make changes. Remember, any modifications will only take effect after you save and compile the hwconfig.
Mad_Poet mentioned: Not sure if this will be beneficial or not, but here’s a resource that might help: [link to Siemens support page]. Regarding your image, the information appears accurate. When accessing the CPU properties through SIMATIC Manager, you’re only able to view them. To make changes, open the hardware configuration (hwconfig) and double-click on the CPU 315. This will launch the properties dialog, allowing you to modify the data. Remember, all changes must be saved and compiled in hwconfig to take effect. Poet here! On another note, the issues might be linked to discrepancies between 256.91 and 256.92. Although the solutions might not be identical, this could provide some insight into the intended functionality of the FC and the reason it cannot be downloaded. Note: Make sure to replace [link to Siemens support page] with the appropriate hyperlink for clarity.
Consider experimenting with a reduced FC (Full Count) value.
"A reference to an oversized counter or timer for the CPU is made within the function code (FC)."
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