Siemens SIMATIC Operating Instructions Manual page 38

Diagnostics
5.2 Error Diagnostics
Behavior of F-Modules When a Module Failure Occurs
In the event of a fatal internal fault in the F-module resulting in failure of the
F-module, the following occur:
● The connection to the backplane bus is interrupted and the fail-safe inputs and outputs
● Diagnostics are not issued by the F-module and the standard "Module Fault" diagnostics
● The SF LED of the relevant F-module illuminates.
Specific Information About Diagnostic Functions
All module-specific diagnostic functions, possible causes, and corrective actions are
described in
Switch PROFIsafe"
The status and diagnostic functions indicated by LEDs on the front panel of each F-module
are also presented in these sections.
Reading Out Diagnostic Functions
You can have the cause of a fault displayed in the module diagnostics in
STEP 7 online help
You can read out diagnostic functions (slave diagnostics) by means of SFC 13 in the
standard user program (see
See also
Diagnostic Functions of the 8/16 F-DI DC24V PROFIsafe Electronic Module (Page 81)
Diagnostic Functions of the 4/8 F-DI/4 F-DO DC24V/2A PROFIsafe Electronic Module
(Page 100)
Properties of the F-Switch PROFIsafe Electronic Module (Page 133)
38
are passivated.
message is issued.
"8/16 F-DI DC24V PROFIsafe"
.
).
"4/8 F-DI/4 F-DO DC24V/2A PROFIsafe"
,
System and Standard Functions
ET 200pro Distributed I/O System - Fail-Safe Modules
STEP 7
reference manual).
Operating Instructions, 05/2007, A5E00394073-02
"F-
to
(see