Note: Trend Tails are included in Meters and are not separate objects.
The Trend Tail object provides the operator with information about the historical behavior of a point. It is always used together with a meter object, and provides a relatively simple and compact method for showing trend information directly on the display.
The vertical scale of trend tail needs to be tied to the meter it is connected to. If the meter has auto-scaling turned on, or if the PV exceeds the practical range and the meter goes into “full-range” mode, then the scale of the trend must change accordingly. There is no alarming associated with the trend tail, however, the meter to which the trend tail is connected will display alarms as configured.
There are no orientation options for the trend tail. Therefore, it can only be used with meters that are in their vertical orientation.
Published June 2018