Technical data
126 •  BACnet/IP Controller 750-830 
 LED Signaling 
 WAGO-I/O-SYSTEM 750 
BACnet/IP Controller 
3.1.9.2 Node Status – "I/O" LED Blink Code 
Tab. 3-23: Node status 
LED  Color  Meaning 
I/O  Red /green / 
orange 
The "I/O" LED indicates the operational status of the node and 
signals any errors. 
After applying the supply voltage, the controller boots up. The red ‘I/O‘ LED 
blinks. 
After an error-free run-up, the "I/O" LED stays lit as green. 
In the event of a failure, the ‘I/O’ LED will blink continuously. 
Detailed error messages are indicated by means of blinking codes. An error is 
indicated cyclically by up to 3 blinking sequences. 
•  The error display starts with the first blinking sequence (approx. 10 Hz). 
•  After a short break, the second blinking sequence starts (approx. 1 Hz). 
The number of light pulses indicates the error code. 
•  After another break, the third blinking sequence starts (approx. 1 Hz). The 
number of light pulses indicates the error argument. 
‘I/O’ LED is blinking
Test o.k.?
No
Yes
‘I/O’ LED is shining
ready for operation
2nd break
1st break
‘I/O’ LED
1st flash sequence
(Introduction of the
error indication)
‘I/O’ LED
2nd flash sequence
Error code
(Number of flash cycles)
‘I/O’ LED
3rd flash sequence
Error argument
(Number of flash cycles)
Coupler/Controller starts up
Switching on
the power supply
Fig. 3-23: LED signaling of the node status  g012111e 










