6-12
Communications Processor CP 541
EWA 4NEB 812 6188-02
6.2.5
Internal Errors
The CP 541 executes a self-test during the start. If an error is detected within
the test, an appropriate error message is written into the range for internal
errors (DW 27 to DW 30).
If the CP 541 detects an error in the RUN state, it interrupts the exchange of
data and goes to STOP.
Proceed in the following order to clear the error:
Step
Remedy
Explanation
1
Switch the CP 541 to the 0 set-
ting.
You reset the CP 541 in a de-
fined basic state.
2
Switch the CP 541 to the STOP
mode and then to RUN.
The CP 541 executes a self-test,
including initialization.
3
If you again receive an internal
error message, continue with
the next step.
If you no longer receive an er-
ror message, the CP 541 is
ready again.
There is a fatal error.
4
Make a note of the error code.
The error code is stored from
DL27 onward.
5
Replace the CP 541.
Follow the instructions in Chap-
ter 3.
6
Consult your Siemens office
with the error message.
–
Meaning
Remedy
Diagnostics and Error Handling