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This is a SIEMENS S7 Programming demo in TIA Portal to illustrate configuration of PROFIBUS DP slaves and sample program in OB86 to detect the slave number that is lost on the PROFIBUS subnet.
One of the most difficult issues to solve in PROFIBUS subnet is to find the cause of intermittent slave failure that have a broad list of reasons such as problematic PROFIBUS connector, damaged cable , damaged slave and EMC .
