Diagnostics
5.2 Error Diagnostics
ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02
35
See also
Properties of 8/16 F-DI DC24V PROFIsafe Electronic Module (Page 56)
Diagnostic Functions of the 8/16 F-DI DC24V PROFIsa
fe Electronic Module (Page 81)
Properties of the 4/8 F-DI/4 F-DO DC24V/2A PROFIsafe Electronic Module (Pa
ge 87)
Diagnostic Functions of the 4/8 F-DI/4 F-DO DC24V/2A PROFIsafe Electroni
c Module
(Page 100)
Properties of the F-Switch PROFIsafe Electronic Module (Page 107)
Properties of the F-Switch PROFIsafe Electronic Module (Page 133)
5.2 Error Diagnostics
Purpose of Diagnostics
Diagnostics are used to determine whether fail-safe modules are detecting signals without
errors. Diagnostic information is assigned either to one channel or to the entire F-module.
Diagnostic Functions Are Not Safety-Critical
None of the diagnostic functions (displays and messages) are safety-critical. Consequently,
they are not implemented as safety-related features, i.e., they are not tested internally.
Diagnostic Options for Fail-Safe Modules in ET 200pro
The following diagnostic options are available for fail-safe modules:
● LED display on the module front panel
● Diagnostic functions of F-modules
Non-Assignable Diagnostic Functions
Fail-safe electronic modules provide non-assignable diagnostic functions. This means that
diagnostics are always enabled and are automatically made available by the F-module in
STEP 7
and forwarded to the F-CPU in the event of an error.
Assignable Diagnostic Functions
You can assign (enable) certain diagnostic functions as parameters in
STEP 7
:
● Short-circuit monitoring for the F-DI module
● Wire break detection for the F-DO module
● Short-circuit monitoring for the F-Switch PROFIsafe
WARNING
Diagnostic functions should be enabled or disabled in accordance with the application.
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