At a minimum, the Out property provides:

• value

  Current value of the data item, within one of four possible data categories. See About data value categories.

• facets

  Items affecting the display of the value, such as decimal places, engineering units, or text descriptors for Boolean/enum states. See About point facets.

• status

  Current status of the data, meaning the health and validity of the associated value. Status is specified by a combination of status flags, such as “fault,” “overridden,” “alarm,” and so on. If no status flag is set, status is considered normal and appears by default as “{ok}.”

  Status flags are set in a number of ways. See About point status.

• priority

  Currently active Niagara priority level (from a 16-level priority scheme), for writable control points only. For more details on priority, see About the priority scheme.

  All writable control points include priority in status, including writable proxy points.

  Priority appears at the end of the Out value, by default formatted as “@ n”, where n is 1 to 16, or if the fallback value is in effect, formatted as “@ def”. For example: “Off {ok} @ 1”.