Fieldbus Status; Node Status - WAGO -I/O-SYSTEM 750 User's Installation And Configuration

42 • Fieldbus coupler 750-342
LED Display
3.1.7.2

Fieldbus status

The operating status of the communication via ETHERNET is signalled by
means of the top LED group (ON, LINK, TxD/RxD and ERROR).
LED
ON
green
OFF
LINK
green
OFF
TxD/RxD
green
OFF
ERROR
red
OFF
3.1.7.3

Node status

The operating status of the communication via the internal bus is signalled via
the bottom I/O LED.
LED
I/O
Green
Red
Red
The coupler starts up after switching on the supply voltage. The "I/O" LED
blinks. The "I/O" LED has a steady light following a fault free run-up.
In the case of a fault the "I/O" LED continues blinking. The fault is cyclically
displayed by the blink code.
Meaning
Fieldbus initialization is correct
Fieldbus initialization is not correct,
no function or self-test
Link to a physical network exists
No link to a physical network
Data exchange taking place
No data exchange
Error on the fieldbus
No error on the fieldbus, normal operation
Meaning
Fieldbus coupler operating perfectly
a) During startup of fieldbus coupler:
Internal bus being initialized,
Startup displayed by LED flashing fast for approx.
1-2 seconds
b) After startup of fieldbus coupler:
Errors, which occur, are indicated by three conse-
cutive flashing sequences. There is a short pause
between each sequential flash.
Trouble shooting
Check the supply voltage (24V and 0V),
check the IP configuration
Check the fieldbus connection.
Trouble shooting
Evaluate the fault message (fault code and
fault argument).
Modular I/O System
ETHERNET TCP/IP