Siemens SIMATIC ET 200S Installation And Operating Manual page 151

Causes of Errors and Corrective Measures
The following table shows the possible causes of errors and corrective actions for the
various diagnostic messages of the EM 4 F-DO DC24V/2A PROFIsafe.
Table 7-31
Diagnostic
Message
Short circuit
Overload
Overtemperat
ure
Wire break
Internal error
Parameter
assignment
error
Missing
external
auxiliary
supply
Communi-
cation error
ET 200S Distributed I/O System - Fail-Safe Modules
Hardware Installation and Operating Manual, 07/2005, A5E00103686-04
7.6 4 F-DO DC24V/2A PROFIsafe digital electronic module
Diagnostic Messages of the EM 4 F-DO DC24V/2A PROFIsafe, Causes of Errors and
Corrective Measures
Fault Possible Causes
Detection
Always Short circuit in the actuator
Cross-circuit in the actuator
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 parameters
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
Fail-Safe Modules
Corrective Measures
Eliminate short circuit/cross circuit
After correction of the fault the module
must be removed and inserted or
switched off and on
Replace module
Eliminate overload
Check load wiring, check ambient
temperature, and check whether
permissible output current (aggregate
current) at the ambient temperature is
exceeded
After correction of the fault the module
must be removed and inserted or
switched off and on
Repair the wire break, ensure the
specified minimum load (see technical
specifications).
Replace module
Correction of configuration (compare
actual and setpoint), check
communication paths
Correction of configuration
Check whether the PROFIsafe address
on the module matches the
STEP 7 HW Config
configuration in
Check interconnected PM, Check
module for correct contact
After correction of the fault the module
must be removed and inserted or
switched off and on
Test PROFIBUS connection Correct
faults
Set a higher value for the "F monitoring
time" parameter for the module in
STEP 7 HW Config
7-91