XOR output forced to track input Module 1,01,02 Block 1001 -- only one input to FC 101 Module 1,01,02 Block 1003
This block's output is always the same as its input, because it only has one input. It may not be clear that the logic has been disabled.
The message is intended to encourage documentation of forced logic, or removal of unused logic.
This message shows a potential error in the system configuration, although most such errors prove to be harmless. It should be reviewed and hidden, unless it shows an issue that should be addressed.
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