The good signal quality function QTY_GOOD evaluates the quality bits of the input signal and passes it as a Boolean signal for the application.
The IN input can be connected to any logic application signal (except preprocessing block). Due to application logic quality bit propagation, each (simple and even combined) signal has quality which can be evaluated.
The OUT output indicates quality good of the input signal. Input signals that have no quality bits set or only test bit is set, will indicate quality good status.