Siemens SIMATIC S5 ET 200U - Structure of Station Diagnostics and Module Diagnostics

4-30
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
The station status, the station diagnostics and the identifier–related diagnos-
tics (module diagnostics) are described in this manual as they are typical for
the ET 200U slave station.
The diagnostics function is loaded and transferred:
L KY (Station number),(code) Station number: 3 to 124
Code: 0, ..., 7
T PW 252 Afterwards the station diagnos-
tics is transferred into the “diag-
nostics address” byte (here I/O
byte 252)
16 bytes per slave station are reserved for station status, station diagnostics
and module diagnostics. The 16 bytes are organized in 8 words. They are
structured as follows:
Table 4-9 Structure of Station Diagnostics and Module Diagnostics
Code Diagnostics Address Diagnostics Address + 1
0 Station status 1 Station status 2
1 Station status 3 Master address
2 Manufacturer identification
3 Header Station diagnostics
4 Header Module diagnostics
(slots 0 to 7)
5 Module diagnostics
(slots 8 to 15)
Module diagnostics
(slots 16 to 23)
6 Module diagnostics
(slots 24 to 31)
Unassigned
7 Unassigned Unassigned
Structure and Re-
quest of Station
Diagnostics for
ET 200U
ET 200U(DP Siemens): AddressAssignment,Starting–Up,Diagnosing Faults Using COMET200