Internal Data Bus Failure - WAGO 750-370 Manual

126 Diagnostics
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10.2.2

Internal Data Bus Failure

'I/O' LED indicates an internal bus failure.
'I/O' LED flashed red:
When an internal data bus failure occurs, the fieldbus coupler generates an error
message (error code and error argument).
An internal data bus failure occurs, for example, if an I/O module is removed.
If the error occurs during operation, the output modules operate as they do during
an internal data bus stop. The input process image is set according to the
configured strategy.
The 'I/O' LED flashed red. The fieldbus coupler (IO device) generates a detailed
diagnostic message.
If the internal data bus error is resolved, the fieldbus coupler is running according
to the configured restart behavior. Then the transmission of process data is
resumed and the outputs of the node are set.
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WAGO-I/O-System 750
750-370 PROFINET IO Fieldbus Coupler
Manual
Version 2.0.0