12/4/2021 3:31 PM | |
Joined: 9/27/2006 Last visit: 4/26/2024 Posts: 12257 Rating: (2665)
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Hello Bisrat Belete; I would like to add one note to Raman S' excellent reply: make sure you never format Siemens MMC with your PC (Windows software), you will render the MMC unusable in any Siemens PLC. Here are guidelines from Siemens: - Why is the MMC no longer recognized by SIMATIC devices after it has been formatted in a third-party device? https://support.industry.siemens.com/cs/ww/en/view/19515769 Daniel Chartier |
4/10/2022 10:53 AM | |
Joined: 9/10/2021 Last visit: 9/25/2023 Posts: 6 Rating: (0) |
Thank you sir. When i insert the MMC the SF will light RED ans the stop button flushes and it will not come in to Run mode.But when i remove the MMC then it will go in to Run mode.This attachment i the Diagonals buffer txt with the CPU without MMC. AttachmentDiagnose.txt (635 Downloads) |
4/10/2022 1:03 PM | |
Joined: 9/27/2006 Last visit: 4/26/2024 Posts: 12257 Rating: (2665)
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Hello Bisrat Belete; First, a suggestion: your diagnostic buffer is limited to 10 messages at the moment. It might be enough to understand your present problem, but in most cases this would not be enough. You should increase the number of messages logged in your diagnostic buffer, up to 100 messages or more, using the Settings button you will find in the diagnostic buffer screen, next to the Save As.. button you used to create the text file you showed us. Now, the diagnostic buffer messages you show point to an "illegal module" in the CPU that cause the error. It looks like the MMC you have is not properly formatted for Siemens S7 PLCs. Either you purchased a faulty MMC, or someone used a Windows PC to format it. In any case, that would be what causes the error message, and the system fault (SF) on the CPU since the MMC is not recognized. To format a S7 MMC, you must never use a Windows card reader. The Siemens Field PGs (programming units) have an integrated card reader designed for this, and there is a USB card reader that Siemens used to market (6ES7972-0AA00-0XA0) but is now in cancellation status: https://support.industry.siemens.com/cs/ww/en/view/21829579 Unless you have access to a Siemens card reader you should concentrate on locating a new, properly formatted MMC for your PLC. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 04/10/2022 13:06:29 |
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