Led Display; Blink Code - WAGO 750-341 Manual

80 • Fieldbus Coupler 750-341

LED Display

3.1.7 LED Display
The coupler possesses several LED's for displaying the coupler operating
status and the complete node status.
ETHERNET ETHERNET
Fig. 3.1-12: Display elements 750-341
The LEDs can be divided into three groups.
The first group of LEDs display the status of the Ethernet fieldbus. It contains
both solid and two-color LEDs. They are labelled as: 'LINK' (green), 'MS'
(red/green), 'NS' (red/green), and 'TxD/RxD' (green).
The second group of LEDsis a three-color LED (red/green/orange). This LED
is labelled 'I/O', and displays the status of the internal bus.
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
voltage.
3.1.7.1

Blink code

When the fieldbus coupler is in a faulted, the 'I/O' LED is used to signal the
fault type through a series of flashes (i.e., blink code). The blink code is
cyclically displayed using 3 different blink sequences.
• The first blink sequence (approx. 10 flashes/second) indicates the start of a
• After a pause, a second blink sequence starts (approx. 1 flash/second).
• The third blink sequence (approx. 1 flash/second) starts following a
01 02 01 02
LINK LINK A A A A
C C
C C C C
B B B B
A A
MS MS
D D
NS NS
24V 0V 24V 0V
TxD/RxD TxD/RxD
I/O I/O
+ + + +
USR
new sequence.
Count the number of flashes to determine the fault code (e.g., 3 flashes
equals Fault Code 3).
another pause. Count the number of flashes to determine the fault
argument.
01 02
ETHERNET
LINK A A
C C A
B B
MS
B
D
NS
24V 0V
TxD/RxD
I/O
+ +
g034102x
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP