Structure Of Station Status 2 (Byte 1); Structure Of Station Status 3 (Byte 2); Structure Of The Master Profibus Address (Byte 3) - Siemens SIMATIC S7-400 Reference Manual

Structure of a CPU 41x
Table 1-16 Structure of Station Status 2 (Byte 1)
Bit
0 1: The DP slave must be assigned new parameters and reconfigured.
1 1: A diagnostic message has been issued. The DP slave cannot continue until the problem has
been corrected (static diagnostic message).
2 1: The bit is always set to "1" if the DP slave with this DP address is present.
3 1: Response monitoring is enabled for this DP slave.
4 0: The bit is always at "0".
5 0: The bit is always at "0".
6 0: The bit is always at "0".
7 1: The DP slave is disabled – that is, it has been removed from cyclic processing.
Table 1-17 Structure of Station Status 3 (Byte 2)
Bit
0
to 0: The bits are always at "0".
6
•
7 1: 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.
Master PROFIBUS Address
The master PROFIBUS address diagnostic byte contains the DP address of the
DP master that:
• Assigns parameters for the DP slave and
• Has read and write access to the DP slave
Table 1-18 Structure of the Master PROFIBUS Address (Byte 3)
Bit
0 to 7 DP address of the DP master that configured the DP slave and has read and write access to
the DP slave.
FF : DP slave has not been configured by any DP master.
H
1-58
Meaning
Meaning
Meaning
Automation System S7-400 CPU Specifications
A5E00165965-01