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112 •
Programmable Field Bus Controller 750-833
LED Signaling
3.11.4 Node Status
The I/O-LED indicates the node operation and signals the occurrence of a
fault.
I/O
green
off
red
red
blinks
red
blinks
orange
The coupler starts after switching on the supply voltage. The I/O-LED flashes
red. Following a fault free run up the I/O-LED changes to green steady light.
In the case of a fault the I/O-LED continues blinking red. The fault is
cyclically displayed with the blink code.
USR
Meaning
*
Data cycle on the internal bus
*
No data cycle on the internal bus
on
Bus coupler is in bootstrap mode or coupler hardware defective
*
When starting: internal bus is initialized
During operation: general internal bus fault
*
Fault message during internal bus reset and internal fault
*
FLASH access to bus device firmware
* not relevant
WAGO-I/O-SYSTEM 750
Bus System
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