Abstract: A control apparatus comprising a first control interface generating a display containing a plurality of function types and receiving a first function type selection. A second control interface generating a display containing a plurality of parameters associated with the selected function type and receiving a parameter selection. A chart interface displaying historical data for a variable and receiving a first and second cursor selection from a user interface device control and generating chart location data associated with the first and second cursor selection. A function controller receiving the location data associated with the first cursor selection and executing a second related function if the chart location data associated with the first cursor selection is within allowable location data and executing the selected function after execution of the second related function if the chart location data is within allowable location data associated with the first selected function.