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