ABB S900 Manual page 38

I/O System S900
Communication Interface for PROFIBUS DP, CI920
Bit 2
Bit 1
Bit 0
If bit 1 and bit 0 are set, bit 0 has the higher priority.
Octet 3: Station_status_3
The individual bits have the following meaning:
Bit 7
Bit 0 to 6: reserved
Octet 4: Diag.Master_Add
In this octet the address of the DP master is entered which has parameterized
this DP slave. If none of the DP masters has parameterized the DP slave, the
DP slave inserts the address 255 in this octet.
Octet 5 to 6 (unsigned16): Ident_Number
The manufacturer identifier is given for a DP-Device. This identifier can be
used on one hand for verification purpose and on the other hand for exact
identification.
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This bit is set to 1 by the DP slave.
Diag.Stat_Diag (static diagnostics)
1: Diag.Stat_Diag (static diagnostics) If the DP slave sets this bit, the DP
master shall fetch diagnostic information as long as this bit is reset again.
For example, the DP slave sets this bit if it is not able to provide valid user
data.
Diag.Prm_Req
If the DP slave sets this bit, the respective DP slave shall be
reparameterized and reconfigured. The bit remains set until
parameterization is finished. This bit is set by the DP slave.
Diag.Ext_Diag_Overflow
If this bit is set there exists more diagnostic information than specified in
Ext_Diag_Data. For example, the DP slave sets this bit if there are more
channel diagnostics than the DP slave can enter in its send buffer; or the
DP master sets this bit if the DP slave sends more diagnostic information
than the DP master can enter in its diagnostic buffer.
3BDD010422R0101