Cpu 41X As Dp Slave: Station Statuses 1 To 3; Table 5-14 Structure Of Station Status 1 (Byte 0); Table 5-15 Structure Of Station Status 2 (Byte 1) - Siemens SIMATIC S7-400 Manual

PROFIBUS DP
5.1 CPU 41x-3 PN/DP as DP master / DP slave
5.1.7

CPU 41x as DP slave: Station statuses 1 to 3

Station statuses 1 to 3
Station status 1 to 3 provides an overview of the status of a DP slave.
Table 5-14 Structure of station status 1 (Byte 0)
Bit
0 1:The DP slave cannot be addressed by the DP
master.
1 1:The DP slave is not yet ready for data exchange.
2 1:The configuration data sent by the DP master to
the DP slave does not match the configuration of
the DP slave.
3 1:Diagnostic interrupt, triggered by RUN-STOP
change on the CPU
0:Diagnostic interrupt, triggered by STOP-RUN
change on the CPU
4 1:Function is not supported, e.g. changing the DP
address via software
5 0:The bit is always "0".
6 1:The DP slave type does not correspond to the
software configuration.
7 1:Parameters have been assigned to the DP slave
by a different DP master to the one that currently
has access to the DP slave.
Table 5-15 Structure of station status 2 (Byte 1)
Bit
0 1:The DP slave must be assigned new parameters and reconfigured.
1 1:There is a diagnostic message pending. The DP slave cannot continue until the problem has been eliminated
(static diagnostic message).
2 1:The bit is always set to "1" if the DP slave with this DP address is present.
3 1:Watchdog monitoring is enabled for this DP slave.
4 0:The bit is always set to "0".
5 0:The bit is always set to "0".
5-20
Meaning
Correct DP address set on the DP slave?
•
Bus connector connected?
•
Voltage at DP slave?
•
RS-485 repeater set correctly?
•
Execute reset on the DP slave
•
Wait while the DP slave powers up.
•
Correct station type or correct configuration
•
of the DP slave entered in the software?
You can read out the diagnostic
•
information.
Check the configuration.
•
–
Correct station type entered in the
•
software? (Parameter assignment error)
The bit is always 1, for example, if you
•
access the DP slave with the programming
device or another DP master.
The DP address of the parameter assignment master is in
the "master PROFIBUS address" diagnostic byte.
Meaning
S7-400 Automation System, CPU Specifications
Remedy
Manual, 10/2006, 6ES7498-8AA04-8BA0