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60 •
Programmable Field Bus Controller 750-833
Operating System
I/O LED
is blinking
I/O LED
is blinking
PFC cycle
I/O LED
is shining
Fig. 3.3.2-8: Operating system 750-833
Switching on the
supply voltage
Is a PFC
program in the flash
memory ?
Yes
orange
PLC program transfer
from the flash memory to RAM
Determination of the I/O modules
and the configuration
Initialization
of the system
red
Test o.k.?
Yes
Operating mode
RUN
Reading inputs, outputs and times
PFC program
is processed
green
Writing outputs
Operating system functions,
updating times
Operating mode
RUN
No
Determination of the I/O modules
Variables are set to 0 or FALSE
or to their initial value,
flags remain in the same status.
No
No
Stop
operating mode switch
is in the top position or
STOP
start command in
PRO
WAGO-IO-
:
Online/Start
or
Online/Stop
Fieldbus data,
data of I/O modules
Fieldbus data,
data of I/O modules
operating mode switch
STOP
is in the top position or
start command in
PRO
WAGO-IO-
:
Online/Start
or
Online/Stop
and the configuration
Test o.k.?
Yes
Fieldbus start
behavior as a coupler
WAGO-I/O-SYSTEM 750
Bus System
g012112e
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