I am guessing that this was a system that has run OK before, but now it has problems with no modification being done by anyone.
If there has been made any software or hardware modifications, then investigate these modifications first.
There seems to be at least one error on at least one of the Profibus networks.
I recommend using the "Hardware Diagnostics" in stead of the diagnostics buffer. The Hardware Diagnostics will often (but not always) point directly to the faulty module.
If more than one DP slave is affected, it is more likely a cable or connector problem, or a missing termination (can also be caused by the last DP slave in the daisy-chain being powered down or the last connector in the daisy-chain not being properly connected).
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yes its as you said the system was running fine. and now it is running as well fine, the thing is what i have mentioned above. also all the drives and remote IOs are working.
@Abdo
This is very, very basic error tracing, so I will advice you to attend a Simatic course. If you were trained, you'd find this error in one minute instead of using one day.
Kalle
thanks KalleOlsen
you alright, what am doing now is reading the troubleshooting module from the serve 1 training course
thanks every body