8.4.1   LOCAL TAG

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.