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Fail-Safe Electronic Modules
8.1 8 /16 F-DI DC24V PROFIsafe Digital Electronic Module
ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02
83
Diagnostic
Message
Fault
Detection
Possible Causes Corrective Actions
Error in communication
between the F-CPU
and module, e.g., due
to defective
PROFIBUS/Industrial
Ethernet connection or
higher than
permissible
electromagnetic
interferences.
Check the PROFIBUS/Industrial Ethernet
connection.
Eliminate the interferences.
PROFIsafe monitoring
time set too low
Set a higher value for the "F-monitoring time"
parameter for the module in
STEP 7 HW Config
Communi-
cation error
Always
Configuration of the F-
module does not
match the fail-safe
program
Recompile the safety program; then reload the
configuration and safety program to the F-CPU
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 sensor supply
cable
Eliminate broken wire
Safety-related
shutdown
Always
Assigned discrepancy
time is too short
Check the assigned discrepancy time.
Once the error is eliminated, the F-module must
be reintegrated in the safety program.
For more information on passivation and reintegration of F-I/O, refer to
"Diagnostics" and the
S7 Distributed Safety Configuring and Programming or Programmable Controllers S7 F/FH
manuals.
Generally Applicable Information on Diagnostics
For information on diagnostics pertaining to all fail-safe modules (e.g., readout of diagnostic
functions; passivation of channels), refer to
"Diagnostics" in this manual as well as the
S7 Distributed Safety Configuring and Programming or Programmable Controllers S7 F/FH
manuals.