3-9
Communications Processor CP 541
EWA 4NEB 812 6188-02
3.4.3
START
The START is explained in the following flowchart.
Step
Flowchart
Explanation
1
STOP state
S
i
The CP 541 is in the STOP
state.
RUN LED flashes at 2 Hz.
2
Setting
of mode
switch?
RUN
STOP
The CP 541 evaluates the set-
ting of the mode switch.
3
Mode switch set to RUN
STOP
Set the mode switch from STOP
to RUN.
4
CP 541 evaluates DB1
The CP 541 evaluates the pa-
rameters in DB1 and checks
them for completeness and plau-
sibility.
5
DB1 ok?
Yes
No
Is DB1 complete and are all pa-
rameters in order?
6
CP 541 evaluates error
CP 541 switches
error LED on
No
If an error is detected, the CP
541 evaluates the error and gen-
erates an appropriate diagnostics
message in DB2.
The ERR error LED is addition-
ally activated.
In the event of an error, the CP
541 remains in the STOP state.
7
CP 541 copies DB1 into EEPROM
The CP 541 writes DB1 into the
EEPROM.
8
RUN state
The CP 541 is in the RUN state.
The RUN LED lights up.
START
Installing and Connecting the CP 541