Fieldbus Coupler • 61
Fieldbus Coupler 750-346
WAGO-I/O-SYSTEM 750
DeviceNet
I/O
Meaning
green
Data cycle on the internal bus
off
No data cycle on the internal bus
red
Coupler hardware defective
red
blinks
When starting: internal bus is initialized
During operation: general internal bus fault
red
blinks cyclically
Fault message during internal bus reset and internal fault:
Fault message of the ‘I/O‘-LED
1 st flash sequence: Start of the Fault message
2 nd flash sequence: Fault code
3 rd flash sequence: Fault argument
Fault code 1: "Hardware and Configuration fault"
Fault argument
Fault description
Trouble shooting
1
Overflow of the internal buffer
memory for the inline code
Turn off the power supply of the
node, reduce number of I/O mod-
ules and turn the power supply on
again. If the error still exists,
exchange the bus coupler.
2
I/O module(s) with unsupported
data type
Detect faulty I/O module as fol-
lows: turn off the power supply.
Place the end module in the mid-
dle of the fieldbus node. Turn the
power supply on again.
– If the LED is still blinking, turn
off the power supply and place the
end module in the middle of the
first half of the node (towards the
coupler).
– If the LED doesn’t blink, turn
off the power supply and place the
end module in the middle of the
second half of the node (away
from the coupler).
Turn the power supply on again.
Repeat this procedure until the
faulty I/O module is detected.
Replace the faulty I/O module.
Ask about a firmware update for
the fieldbus coupler.
3
Invalid EEPROM checksum
Turn off the power supply of the
node, reduce number of I/O mod-
ules and turn the power supply on
again
4
Error occurred when writing to
serial EEPROM
Turn off the power supply of the
node, exchange fieldbus coupler
and turn the power supply on
again.