Fail-Safe Modules
7.5 4/8 F-DI DC24V PROFIsafe Digital Electronic Module
ET 200S Distributed I/O System - Fail-Safe Modules
132 Installation and Operating Manual, 08/2008, A5E00103686-07
Diagnostic
Message
Possible Causes Corrective Measures
Inserted module does not match
configuration
Faulty parameter assignment
Correct configuration (compare actual and
preset configuration)
Check communication paths
Correct configuration
Parameter
assignment error
PROFIsafe address set incorrectly in
the F-module
Check whether the PROFIsafe address on
the module matches the configuration in
HW Config
Sensor voltage
or load voltage
missing
No supply voltage or supply voltage
is too low
Check the supply voltage on the
interconnected PM
Check module for correct contact
Error in communication between F-
CPU and module due to defective
PROFIBUS connection or higher than
permissible EMI, for example
Check the PROFIBUS/PROFINET
connection
Eliminate the interference
PROFIsafe monitoring time set too
low
Set a greater value for the "F monitoring
time" parameter for the module in
HW Config
Communication
error
Configuration of the F-module does
not match safety program
Generate safety program again; then load
configuration and safety program into F-
CPU again
Faulty process signal
Defective sensor
Check process signal, replace sensor if
necessary
Short circuit between unconnected
sensor cable and the sensor supply
cable
Eliminate short circuit
Wire break in connected sensor cable
or the sensor supply cable
Eliminate broken wire
Discrepancy
error (1oo2
evaluation)
Assigned discrepancy time too short Check the assigned discrepancy time
Once the fault is eliminated, the F-module
must be reintegrated in the safety
program
Detailed information on F I/O access can be found under
"Diagnostics"
in the
S7 Distributed
Safety, Configuring and Programming
manual or the
S7 F/FH Systems, Configuring and
Programming
manual.
Generally Applicable Information on Diagnostics
For information on diagnostics that affects all fail-safe modules (such as readout of
diagnostic functions; passivation of channels) see this manual in
"Diagnostics"
and the
S7 Distributed Safety, Configuration and Programming
manual or
S7 F/FH Systems,
Configuring and Programming
.
See also
Fault Diagnostics (Page 43)
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