130 • BACnet/IP Controller 750-830
LED
Signaling
WAGO-I/O-SYSTEM
750
BACnet/IP Controller
Error code 3 “Protocol error internal bus”
Error
argument
Error description
Solution
2. Are all modules connected correctly or are there
any 750-613 bus modules in the node?
3. Switch off the power for the node.
4. Plug the end module in the middle of the node.
Turn on the power supply again.
5. LED continues to flash?
Switch off the power and plug the end module into
the middle of the first half of the node (toward the
controller).
LED not flashing?
Switch off the power and plug the end module into
the middle of the second half of the node (away
from controller).
6. Turn on the power supply again.
7. Repeat Items 5 and 6 (while halving the step size)
until the faulty bus module is detected.
8. Replace the faulty bus module.
9. If there is only one bus module left and the LED
continues to flash, either this module or the
controller is defective. Replace the faulty
component.
Error code 4 "Physical error, internal bus"
Error
argument
Error description
Solution
-
Internal bus data
transmission error or
interruption of the
internal bus at the bus
coupler.
1. Switch off the power for the node.
2. Place a bus module with process data behind the
coupler and note the error argument after the
power supply is turned on.
3. If no error argument is indicated by the I/O LED,
replace the fieldbus coupler.
4. Otherwise identify the faulty bus module. Turn
off the power supply.
5. Plug the end module in the middle of the node.
Turn on the power supply again.
