104 Diagnostics
WAGO I/O SYSTEM 750 XTR
750-333/040-000 FC PROFIBUS G2 12MBd XTR
Manual
Version 1.4.0
Table 48: Blink Code Table for the I/O LED Signaling, Error Code 4
Error code 4: “Physical error, internal bus”
Error
Argument
Error Description
Solution
-
Local bus data
transmission error or
interruption of the
local bus at the
fieldbus coupler
1. Turn off the power supply to the node.
2. Plug the end module behind the fieldbus coupler.
3. Turn the power supply on.
4. Observe the error argument signaled.
- Is no error argument indicated by the I/O LED? -
5. Replace the fieldbus coupler.
- Is an error argument indicated by the I/O LED? -
6. Identify the faulty I/O module by turning off the power
supply.
7. Plug the end module into the middle of the node.
8. Turn the power supply on again.
9. - LED continues to flash? -
Turn off the power and plug the end module into the middle
of the first half of the node (toward the fieldbus coupler).
- LED not flashing? -
Turn off the power and plug the end module into the middle
of the second half of the node (away from the fieldbus
coupler).
10. Turn the power supply on again.
11. Repeat the procedure described in step 6 while halving the
step size until the faulty I/O module is detected.
12. Replace the faulty I/O module.
13. If there is only one I/O module on the fieldbus coupler and
the LED is flashing, either the I/O module or fieldbus
coupler is defective. Replace the I/O module with a
pretested, properly functioning I/O module. If the LED no
longer flashes, the replaced I/O module was faulty.
Replace this I/O module.
14. If the LED continues to flash, the fieldbus coupler is faulty.
Replace the fieldbus coupler.
n*
Interruption of the
local bus behind the
nth I/O module with
process data
1. Turn off the power supply to the node.
2. Replace the (n+1) I/O module containing process data.
3. Turn the power supply on.
* The number of light pulses (n) indicates the position of the I/O module.
I/O modules without data are not counted (e.g., supply modules without diagnostics)
Table 49: Blink Code Table for the I/O LED Signaling, Error Code 5
Error code 5: “Initialization error, internal bus”
Error
Argument
Error Description
Solution
n*
Error in register
communication during
local bus initialization
1. Turn off the power supply to the node.
2. Replace the (n+1) I/O module containing process data.
3. Turn the power supply on.
* The number of light pulses (n) indicates the position of the I/O module.
I/O modules without data are not counted (e.g., supply modules without diagnostics)