Commissioning and Diagnostics
5-28
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
S7 diagnostics
S7 diagnosis can be requested for all modules in the
SIMATIC S7/M7 range of modules. The structure of the S7 diagnosis is identical
for base unit and distributed modules.
The diagnosis data of a module is in data records 0 and 1 of the system data part
of the module. Data record 0 contains 4 bytes of diagnostic data describing the
current state of a module. Data record 1 contains module diagnostics data in
addition.
Data records 0 and 1 are contained in the slave diagnosis (refer to Section for its
structure 5.6.2).
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