Value Duration Plot

Introduction

The Value Duration Plot shows how much time SCADA measurements are at different values:

A value duration plot showing the duration a SCADA measurement is equal or above a value.

Navigating Using the keyboard

Use these keys to change the time scale of the Value Duration Plot:

Key	Action
Ctrl + Left Arrow	View the previous time interval
Ctrl + Right Arrow	View the next time interval
Home	Reset the position of the X axis back to the default

Display Pen Data Values

To display the raw data values associated with a pen:

Right-click the pen at the bottom of the trend.
Select Display Data Values.

To display the raw data values associated with all pens:

Right-click the main trend area.
Select Display Data Values.

Read Values Using the Ruler

The Value Duration Plot supports a vertical ruler, allowing you to display the pen values at a duration:

A value duration plot showing the vertical ruler.

The duration the ruler represents is shown above the graph area. The values of each pen at the ruler position are shown in the pen area at the bottom of the trend.

You can display or hide the ruler using mouse clicks on the graph area of the plot:

Effect	Action
To show the ruler	Click the graph area of the plot.
To hide the ruler	Click the ruler in the graph area of the plot.
To move the ruler to a new location	Click a new location in the graph area of the plot.

Further Information

Trend Plot

To learn about a plot showing how a measurement varies over time.

Operator Interface

To learn about the other features of the Operator Interface.

Glossary

For the meaning of terms used in Fernhill SCADA.