Led Display; Fieldbus Status - WAGO 750 Series Manual

58 • Fieldbus coupler 750-342

LED Display

3.1.7 LED Display
The coupler possesses several LED's for displaying the coupler operating
status and the complete node status.
Fig. 3-15: Display elements 750-342
The LEDs can be divided into three groups.
The first group of LEDs display the status of the Ethernet fieldbus. It contains
the solid color LEDs, labelled as: 'ON' (green), 'LINK' (green), 'TxD/RxD'
(green) and 'ERROR' (red).
The second group of LEDs is a three-color LED (red/green/orange). This LED
is labelled 'I/O', and displays the status of the internal bus and i. e. the status
of the fieldbus node.
The third group uses solid colored green LEDs. They are located on the right-
hand side of the coupler power supply. These display the status of the supply.

3.1.7.1 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
ETHERNET
ON A
C
B
LINK
D
TxD/RxD
24V 0V
ERROR
I/O
+ +
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
ETHERNET
ON A
C
B
LINK
D
TxD/RxD
24V 0V
ERROR
I/O
+ +
Trouble shooting
Check the supply voltage (24V and 0V),
check the IP configuration
Check the fieldbus connection.
WAGO-I/O-SYSTEM 750
G012946x
ETHERNET TCP/IP