Fieldbus controller 750-842
•
89
LED Display
Modular I/O System
ETHERNET TCP/IP
“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. 3-36: Signalling of the LED for indication of the node status
g012911e
After overcoming a fault restart the controller by cycling the power.