120 Diagnostics
WAGO-I/O-SYSTEM 750
750-806 Fieldbus Controller DeviceNet
TM
Manual
Version 2.0.0
Table 46: Blink Code Table for the I/O LED Signaling, Error Code 2
Error code 2: “Exceeded Process Image”
Error
Argument
Error Description
Solution
1
Not used
-
2
Process image is
too large.
1. Turn off the power supply of the node.
2. Reduce number of I/O modules.
3. Turn the power supply on.
Table 47: Blink Code Table for the I/O LED Signaling, Error Code 3
Error code 3: “Protocol error, internal bus”
Error
Argument
Error Description
Solution
-
Internal data bus
communication is
faulty, defective
module cannot be
identified.
- Are passive power supply modules (750-613) located in the
node? -
1. Check that these modules are supplied correctly with
power.
2. Determine this by the state of the associated status LEDs.
- Are all modules connected correctly or are there any 750-
613 Modules in the node? -
1. Determine the faulty I/O module by turning off the power
supply.
2. Plug the end module into the middle of the node.
3. Turn the power supply on again.
4. - LED continues to flash? -
Turn off the power supply and plug the end module into
the middle of the first half of the node (toward the
fieldbus controller).
- 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 controller).
5. Turn the power supply on again.
6. Repeat the procedure described in step 4 while halving
the step size until the faulty I/O module is detected.
7. Replace the faulty I/O module.
8. If there is only one I/O module on the fieldbus controller
and the LED is flashing, either the I/O module or fieldbus
controller is defective.
9. Replace the defective component.