
112 • Programmable Field Bus Controller 750-833
LED Signaling
WAGO-I/O-SYSTEM 750
Bus System
3.11.4 Node Status
The I/O-LED indicates the node operation and signals the occurrence of a
fault.
I/O USR Meaning
green * Data cycle on the internal bus
off * No data cycle on the internal bus
red on Bus coupler is in bootstrap mode or coupler hardware defective
red
blinks
* When starting: internal bus is initialized
During operation: general internal bus fault
red
blinks
* Fault message during internal bus reset and internal fault
orange * FLASH access to bus device firmware
* not relevant
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.
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