Structure Of Station Status 1 (Byte 0) - Siemens SIMATIC S7-300 Series Reference Manual

2.6.5 Station Status 1 to 3
Definition
Station status 1 to 3 provides an overview of the status of a DP slave.
Station Status 1
Table 2-10 Structure of Station Status 1 (Byte 0)
Bit Description
0 1: DP slave cannot be addressed by
DP master.
1 1: DP slave is not ready for data
interchange.
2 1: The configuration data which the
DP master sent to the DP slave do
not correspond with the DP slave's
actual configuration.
3 1: Diagnostic interrupt, generated by a
RUN/STOP transition on the CPU
0: Diagnostic interrupt, generated by a
STOP/RUN transition on the CPU
4 1: Function is not supported, for
instance changing the DP address
at the software level.
5 0: This bit is always "0".
6 1: DP slave type does not correspond
to the software configuration.
7 1: DP slave was configured by a
different DP master to the one that
currently has access to it.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
S
Is the correct DP address set on the DP
slave?
S
Bus connector plugged in?
S
Does the DP slave have power?
S
RS 485 Repeater setting OK?
S
Execute a Reset on the DP slave.
S
Wait; the DP slave is still doing its run-up.
S
Was the software set for the right station
type or the right DP slave configuration?
S
You can read out the diagnostic data.
S
Check the configuring data.
-
S
Was the software set for the right station
type? (parameter assignment error)
S
Bit is always "1" when, for instance, you are
currently accessing the DP slave via the PG
or a different DP master.
The DP address of the master that
configured the slave is located in the
"Master PROFIBUS address" diagnostic
byte.
Remedy
2-25