Siemens PM-E F pm DC24V PROFIsafe Installation And Operating Manual page 173

Causes of Faults and Corrective Measures
The following table contains the possible causes of the faults described for the individual
diagnostic messages of the EM 4 F-DO DC24V/2A PROFIsafe and remedies.
Table 7- 37
Diagnostic
Message
Short circuit
Overload
Overtemperat
ure
Wire break
Internal error
Parameter
assignment
error
Sensor
voltage or
load voltage
missing
Communicatio
n error
Safety-related
shutdown
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
7.7 4 F-DO DC24V/2A PROFIsafe digital electronic module
Diagnostic messages of the EM 4 F-DO DC24V/2A PROFIsafe, causes of errors and
remedies
Fault Possible Causes
Detection
Always Short circuit in the actuator
Cross circuit in the actuator Eliminate the cross-circuit within 100
Internal error
For "1" Output stage is overloaded
output signal and becomes too hot
only
Always Shutdown due to violation
of upper or lower
temperature limit value in
the module case
For "1" Line break
output signal
only
Always Internal module fault has
occurred
Always Inserted module does not
match configuration.
Incorrect parameter
assignment.
PROFIsafe address set
incorrectly in the F-module
Always No supply voltage or
supply voltage is too low
Always Error in communication
between F-CPU and
module, e.g. due to
defective PROFIBUS
connection or higher than
permissible EMI
PROFIsafe monitoring time
set too low
Configuration of the F-
module does not match
safety program
Always Switching frequency
exceeded
Fail-Safe Modules
Corrective Measures
Eliminate the short-circuit
hours after the error has occurred.
Replace module
Eliminate overload
Check load wiring, check ambient
temperature, check whether permissible
output current (total 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.
Eliminate broken wire, ensure specified
minimum load (see Technical
Specifications)
Replace module
Correct the configuration (compare
actual and preset configuration), check
communication paths
Correct configuration
Check whether the PROFIsafe address
on the module matches the
HW Config
configuration in
Check the supply voltage on the
interconnected PM, check the module
for correct contact
Test PROFIBUS/PROFINET
connection. Correct faults
Set a greater value for the "F monitoring
time" parameter for the module in
HW Config
Generate safety program again; then
load configuration and safety program
into F-CPU again
Reduce the switching frequency
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