LOCAL TAG is a user defined local screen tag used within a Graphic Display. Local Screen Tags show up using the VIEWDAQ button of the Point List. Local screen tags are commonly used to animate displays or hold temporary values.
When a technician or engineer creates a Local Tag File in the Graphics Builder and assigns the Local Tag File to a graphic display. Tags are created with Span Hi, Span Lo and engineering units. Local Tags do not alarm. Engineers and technicians can define the security Level required to change tags. A user must have a level equal to or greater than the Local Screen Tags level.
A common example of Local Tags is a screen tag to animate a spinning fan. A script increments the local tag from 0 to 360 based on the On/OFF state of a digital IO tag.