Technical data
Diagnostics
23.2 Diagnostics Symbols in the Online View
Programming with STEP 7
Manual, 05/2010, A5E02789666-01 479
23.2 Diagnostics Symbols in the Online View
Diagnostics symbols are displayed in the online project window and in the hardware configuration
window with the online view of configuration tables.
Diagnostics symbols make it easier for you to detect a fault. You can see by a glance at a module
symbol whether diagnostic information is available. If there are no faults present, the symbols for
the module types are displayed without additional diagnostics symbols.
If diagnostic information is available for a module, a diagnostics symbol is displayed in addition to
the module symbol or the module symbol is displayed with reduced contrast.
Diagnostics Symbols for Modules (Example: FM / CPU)
Symbol Meaning
Mismatch between preset and actual configuration: the
configured module does not exist or a different module type is
inserted
Fault: module has a fault.
Possible causes: diagnostic interrupt, I/O access error, or
error LED detected
Diagnostics not possible: no online connection, or the CPU
does not return diagnostic information to the module (for
example, power supply, or submodule).
Diagnostics Symbols for Operating Modes (Example: CPU)
Symbol Mode
STARTUP
STOP
STOP
triggered by STOP mode on another CPU in multicomputing
operation
RUN
HOLD