Siemens SIMATIC ET 200S Installation And Operating Manual page 79

Diagnostic
Message
Communication
error
Safety-related
shutdown
Generally Applicable Information on Diagnostics
For information on diagnostics that pertains to all fail-safe modules (for example for reading
out diagnostic functions, passivating channels), refer to
See also
Fault Diagnostics (Page 5-3)
ET 200S Distributed I/O System - Fail-Safe Modules
Hardware Installation and Operating Manual, 07/2005, A5E00103686-04
Fault Possible Fault Causes
Detection
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
7.2 PM-E F pm DC24V PROFIsafe Power Module
Corrective Measures
Check the PROFIBUS connection
Eliminate the interference.
Set a higher value for the "F monitoring
time" parameter for the module in
STEP 7 HW Config
Generate safety program again; then
download configuration and safety
program to F-CPU again
Reduce the switching frequency or use a
semiconductor output
Chapter 7
Fail-Safe Modules
in this manual.
7-19