4/19/2022 10:38 PM | |
Joined: 9/27/2006 Last visit: 11/11/2024 Posts: 12293 Rating: (2691)
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Hello Mohammad; There is a very limited number of diagnostic LEDs on a S7-400 CPU, they ae described in te following manual: https://support.industry.siemens.com/cs/ww/en/view/53385241/31144155659 INTF (internal fault) and EXTF (xternal fault) would be the main indicators that there is a fault presen either in the CPU or on one of the external modules attached to the CPU. The BUSxF LEDs indiacate on what communication network there is a reported error. Each individual module will show a SF LED (system fault), some of them will have a channel fault indicator, but nothing as complex as what you are asking about. For all diagnstic issues, yu should refer to the diagnostic buffer of the CPU (and of each intelligent module attached to it), that is where all the information is collected when a fault LED is activated, and it is the main tool for troubleshooting the PLC. There are ways to obtain such diagnostic data through program functions, see this discussion for details: https://support.industry.siemens.com/tf/ww/en/posts/report-system-error/117989 Hope this helps, Daniel Chartier |
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