Table of Contents
Advertisement
Diagnostics and Error Handling
6.1
Local Diagnostics with LEDs
Indication
Operational State
Diagnosis
DB1 Error
6-2
The CP 541 has three LEDs to indicate the current operational state and any
errors.
The current operational state of the CP 541 is indicated with three LEDs.
RUN LED
The current state is indicated with the green RUN LED. Table 6-1 con-
tains a summary of the indications.
Table 6-1
Indications of the RUN LED
RUN LED ...
is off
flashes at 2 Hz
flashes at 8 Hz
is lit
ERR LED
The red ERR LED indicates a general error in the CP 541 or at the PG/
PLC connection.
BF L2 LED
The red BF L2 LED indicates a SINEC L2 bus error or that the CP 541
has not yet been integrated in SINEC L2.
The diagnosis is given by the combination of the three LEDs. To clear the
error, you must evaluate DB2.
If you set the mode switch on the CP 541 from STOP to RUN, and the RUN
LED continues to flash, there is a DB1 error.
CP 541 ...
is switched off.
is in the STOP state.
is executing an internal test.
is in the RUN state.
Communications Processor CP 541
EWA 4NEB 812 6188-02
Advertisement
Table of Contents
