Fail-Safe Electronic Modules
8.3 F -Switch PROFIsafe Digital Electronic Module
ET 200pro Distributed I/O System - Fail-Safe Modules
134 Operating Instructions, 05/2007, A5E00394073-02
Causes of Faults and Corrective Actions
The following table lists the possible causes of faults and corrective measures for the
individual diagnostic messages of the F-Switch PROFIsafe electronic module.
Table 8-30 Causes of Faults and Corrective Measures for Diagnostic Messages of the F-Switch
PROFIsafe Electronic Module
Diagnostic
Message
Fault
Detection
Possible Causes Corrective Actions
Short circuit in the actuator
Cross-circuit in the actuator
Eliminate short circuit/cross circuit on
actuator
Once the fault has been eliminated, the
module must be removed and inserted,
or the power switched off and on
Always
Internal fault Replace module
For output
signal "1"
only
Overload: output stage is
overloaded and becomes
too hot.
Eliminate overload.
Short circuit
Cyclically
during short-
circuit test
Short circuit at the sensor
Cross circuit at the sensor
Eliminate short circuit/cross circuit on
sensor
Overtemperat
ure
Always Shutdown due to violation
of temperature limit values
in the module case.
Check load wiring. Check ambient
temperature. Check whether
permissible output current (aggregate
current) is exceeded for the ambient
temperature.
Once the fault has been eliminated, the
module must be removed and inserted,
or the power switched off and on
Fault Always Internal module fault has
occurred
Replace module
Inserted module does not
match configuration;
incorrect parameter
assignment
Correct the configuration (compare
actual and preset configuration). Check
communication paths.
Correct the configuration.
Parameter
assignment
error
Always
PROFIsafe address set
incorrectly on the F-module
Check whether the PROFIsafe address
on the module matches the
configuration in
STEP 7 HW Config
No supply voltage or
supply voltage is too low
Check module for proper contact.
Once the fault has been eliminated, the
module must be removed and inserted,
or the power switched off and on
Sensor
voltage or
load voltage is
missing
Always
Voltage dip due to short
circuit
Eliminate short circuit/cross circuit.
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