Siemens SIMATIC S7-400 Manual page 95

Bit
6 0:The bit is always set to "0".
7 1:The DP slave is disabled; in other words, it has been removed from cyclic processing.
Table 5-16 Structure of station status 3 (Byte 2)
Bit
0
to 0:The bits are always set to "0".
6
7 1:
Master PROFIBUS Address
The master PROFIBUS address diagnostic byte contains the DP address of the DP master
that:
● Assigned parameters to the DP slave and
● has read and write access to the DP slave
Table 5-17 Structure of the master PROFIBUS address (byte 3)
Bit
0 to 7 DP address of the DP master that configured the DP slave and that has read and write access to the DP
slave.
FF : DP slave has not been assigned parameters by any DP master.
H
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0
There are more diagnostic messages than the DP slave can store.
•
The DP master cannot enter all the diagnostic messages sent by the DP slave in its
•
diagnostic buffer.
5.1 CPU 41x-3 PN/DP as DP master / DP slave
Meaning
Meaning
Meaning
PROFIBUS DP
5-21