Siemens SIMATIC ET 200S Installation And Operating Manual page 135

Causes of Faults and Corrective Measures
The following table presents the possible causes of faults and corrective measures for the
individual diagnostic messages of the EM 4/8 F-DI DC24V PROFIsafe.
Table 7-27
Diagnostic
Message
Short circuit
Over-
temperature
Internal fault
Parameter
assignment
error
Missing
external
auxiliary supply
Communication
error
ET 200S Distributed I/O System - Fail-Safe Modules
Hardware Installation and Operating Manual, 07/2005, A5E00103686-04
7.5 4/8 F-DI VDC24V PROFIsafe Digital Electronic Module
Diagnostic Messages of the EM 4/8 F-DI DC24V PROFIsafe, Causes of Faults and
Corrective Measures
Possible Causes
Short circuit in the sensor
Cross circuit in the sensor
Internal fault
Shutdown due to violation of upper or
lower temperature limit value in the
module case.
Internal module fault has occurred
Inserted module does not match
configuration
Faulty parameter assignment
PROFIsafe address set incorrectly in
the F-module
No supply voltage or supply voltage is
too low
Error in communication between
F-CPU and module due to defective
PROFIBUS connection or higher than
permissible EMI, for example
PROFIsafe monitoring time set too low
Configuration of the F-module does not
match fail-safe program
Fail-Safe Modules
Corrective Measures
Eliminate short circuit/cross circuit
Replace module
Check ambient temperature,
Check whether permissible output current
of the sensor power supply is exceeded at
the ambient temperature
After correction of the fault the module
must be removed and inserted or
switched off and on
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 configuration in
STEP 7 HW Config
Check interconnected power module
Check module for correct contact
After correction of the fault the module
must be removed and inserted or
switched off and on
Check the PROFIBUS connection
Eliminate the interference.
Set a higher value for the "F monitoring
time" parameter for the module in
HW Config
Generate safety program again; then
download configuration and safety
program to F-CPU again
STEP 7
7-75