When linking an input-type slot of a writable point or kitControl object, the value received at the input is processed (evaluated) by that point or object only if it is valid.
A valid input is one with none of the following status flags set:
-
down
-
fault
-
disabled
-
null
-
stale
If any of the above status bits are set at an input, that input value is not used.
-
If a kitControl object with a single input, by default that object uses the last known valid received (at least until the input becomes valid again).
-
If a kitControl object with a multiple inputs, only the valid inputs are evaluated.
-
If a writable point, the priority scan continues. See About the priority scheme.