ident numbers: what are they, where do I get them?
Every DP/PA device type has to have an individual ident Number. This number is necessary so that a DP-master is able to identify the types of the connected DP/PA devices without a significant protocol overhead. The master compares the ident Number of each connected device with the ident Number in the configuration database. User data transfer in the operation phase is only possible when the right DP Slave is connected to the correct address. This ensures very high protection against parameterization faults. The vendors must apply to the PPROFIBUS Support Center for an individual ident Number for every DP/PA device type. There’s much more about ident Numbers and how to get them here.
