Table 55: Blink Code Table For The 'I/O' Led Signaling, Error Code 1; 750-370 Profinet Io Fieldbus Coupler - WAGO 750-370 Manual

120 Diagnostics
• After the second pause, the third flash sequence starts (approx. 1 Hz):
The I/O LED flashes twelve times.
Error argument 12 means that the internal data bus is interrupted behind the
twelfth active I/O module.
The thirteenth I/O module is either defective or has been removed from the
network.
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Table 55: Blink Code Table for the 'I/O' LED Signaling, Error Code 1

Error code 1: "Hardware and configuration error"
Error
Argument
1
2
3
4
5
6
7
Error Description Solution
Overflow of the
1. Turn off the power for the node.
internal buffer
2. Reduce the number of I/O modules
memory for the
3. Turn the power supply on again.
attached I/O
3. If the error persists, replace the fieldbus coupler.
modules.
Determine the faulty I/O module.
1. Turn off the power supply.
4. Plug the end module into the middle of the node.
5. Turn the power supply on again.
6. --- LED continues to flash? ---
I/O module(s) with
unknown data type
7. Turn the power supply on again.
8. Repeat the procedure described in step 4 while halving
9. Replace the faulty I/O module.
10. Inquire about a firmware update for the fieldbus coupler.
Invalid check sum in 1. Turn off the power supply for the node.
the parameter area of 2. Replace the fieldbus coupler.
the fieldbus coupler. 3. Turn the power supply on again.
1. Turn off the power supply for the node.
Fault when writing in
2. Replace the fieldbus coupler.
the serial EEPROM.
3. Turn the power supply on again.
1. Turn off the power supply for the node.
Fault when reading
2. Replace the fieldbus coupler.
the serial EEPROM
3. Turn the power supply on again.
The I/O module
configuration after
AUTORESET
differs from the
1. Restart the fieldbus coupler by turning the power supply
configuration
determined the last
time the fieldbus
coupler was powered
up.
Invalid hardware- 1. Turn off the power supply for the node.
firmware 2. Replace the fieldbus coupler.
combination. 3. Turn the power supply on again.

750-370 PROFINET IO Fieldbus Coupler

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).
the step size until the faulty I/O module is detected.
off and on.
WAGO-I/O-System 750
Manual
Version 2.0.0