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6.3
Fault Diagnostics
Definition
Diagnostics can be used to determine whether faults occurred during signal
acquisition by the fail-safe I/O module. Diagnostic information is assigned either to
one channel or to the entire fail-safe I/O module.
Diagnostic Functions are not Critical to Safety
Diagnostic functions (displays and messages) are not critical to safety and
therefore are not designed to be safety-oriented functions. That is, they are not
tested internally.
Diagnostic Options for the Fail-Safe I/O Module
The following diagnostic options are available for the fail-safe I/O module:
• LED display on front panel of the I/O module
• Diagnostic functions of the fail-safe I/O module (slave diagnostics complying
with the PROFIBUS standard IEC 61784-1:2002 Ed1 CP 3/1)
Diagnostic Functions that Cannot be Activated by the User
The fail-safe I/O module provides diagnostic functions that cannot be deselected or
influenced. This means that diagnostics are always activated and are automatically
made available by the fail-safe I/O module in STEP 7 and passed on to the F-CPU
in the event of a fault.
Diagnostic Functions that can be Assigned as Parameters
You can activate certain diagnostic functions using parameter settings in STEP 7:
• short-circuit monitoring (short-circuit test parameter, see Section 8.2).
Warning
!
Diagnostic functions must be enabled or disabled in coordination with the
application.
ET 200eco Distributed I/O Station Fail-Safe I/O Module
A5E00297494-02
Diagnostics
6-3
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