FBD/LD Parser Warning (FBDP1001): Auto-generated Explicit Feedback.

The compiler substituted a code construct in your graphical network by an auto-generated (temporary internal) variable which is first written and then (in the next cycle) read. This corresponds to an explicit feedback that may lead to unintended behavior because, for example, the initial value of this temporary variable is not known.

This message is not an error but a warning.
Make sure that this explicit feedback ...

is not a non-intended programming error.
cannot result in any unintended or unstable behavior of the application.