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S7-400 which is in stop mode and EXTF and REDF led is on.

Created by: salimcarver at: 4/20/2022 12:58 PM (2 Replies)

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4/20/2022 12:58 PM	Rate (0)
salimcarver Member Joined: 4/20/2022 Last visit: 2/4/2023 Posts: 2 Rating: (0)	Dear All, I am attaching with this subject diagnosis of S7-400 which is in stop mode and EXTF and REDF led is in on condition. Dear All kindly suggest what can be a possible solution. Especially 8186 error I don't understand, if anyone has any idea kindly let me know. Thanks in advance. Salim Attachment Diagnose 2.txt (782 Downloads)

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4/20/2022 1:10 PM	Rate (1)
mopS04 Platinum Expert Joined: 3/5/2014 Last visit: 8/5/2022 Posts: 5521 Rating: (1054)	hi salimcarver, one of the PLCs has done a memory reset. it says because of memory replacement. The other PLC can not link up because of the differences. What has been done with this station before? Was the project loaded again after memory reset? regards,
	FCK WAR! Be nice!
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4/21/2022 12:42 PM	Rate (0)
salimcarver Member Joined: 4/20/2022 Last visit: 2/4/2023 Posts: 2 Rating: (0)	Hello Dear, Thanks for the quick reply! Yes memory resets were done and uploading activity was not done. As I understand, after Mset switch is pressed continue after master and slave get sync in auto, and no need to download the program in the CPU. Anyway, kindly let me know now how to normalize and take CPU again in run mode. Thanks in Advance.

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