On the Profibus-DP or Profi-S-IO master, what is the signification of the diagnostic flag SLAVE_ERR?

FAQ #101173

The diagnostic flag Slave_Err does indicate that at least one Profibus slave has an error.

The error could be that the slave(s) is/are not connected to the Profibus network or that the slave(s) is/are connected to the Profibus network but do have diagnostic information’s.


That means that it's possible that a DP or Profi-S-IO Slave does communicate correctly but the diagnostic flag SLAVE_ERR and the corresponding bit on the diagnostic register Base+x is set to high because the slave does send a diagnostic information (for example overload on the output driver) to the master.

The concerned slave(s) number(s) is/are shown on the diagnostic register Base+3.. base+6.

To know the reason for the slave error on the application program it's necessary to perform a scon instruction # 1 "read slave diagnostic data" as described on the manual 26-765.



PG5 2.0 / Profibus DP

PG5 2.0 / Profi-S-I/O

Last update: 30.05.2015 08:47

First release: 26.03.2009 13:58

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