to pop up its description (if any).
An instance of this function block type displays the process variable
(PV) and output (OUT), and provides user
input of the set point (SP), for a closed-loop
controller. The values of these variables are treated as percent of
full scale.
The LABEL input provides a top-centered label for the
faceplate ( TANK LEVEL in this example).
The AUTO output provides for user control of the
controller mode via the Auto/Manual radio buttons.
See the TANK_MVCL system
configuration for an example of the usage of an instance of this
type.