Trend Page

Help Contents

Introduction

The Trend Page shows the historic value of one or more SCADA tags in a trend:

Trend showing an analog data point tag

Navigating with the Mouse

To pan the trend left or right:

  1. Press the mouse button down on the X axis or the trend data area.
  2. Move the mouse left or right.
  3. Release the mouse button.

To zoom in to see data in more detail:

  1. Move the mouse to the center of the data of interest.
  2. Roll the mouse wheel forwards.

    Note: One mouse wheel click forward zooms in by 20%.

To zoom out to see a wider time span:

  1. Move the mouse to the center of the data of interest.
  2. Roll the mouse wheel backwards.

    Note: One mouse wheel click back zooms out by 25%.

Display Pen Data Values

To display the raw data values associated with a pen:

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

To display the raw data values associated with all pens:

  1. Right click the main trend area.
  2. Select Display Data Values.

Read Trend Values Using the Ruler

The Trend Window supports a vertical ruler, allowing you to display the pen values at a point in time:

Trend window showing the vertical ruler.

The time 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 trend:

EffectAction
To show the ruler Click on the graph area of the trend.
To hide the ruler Click on the ruler in the graph area of the trend.
To move the ruler to a new location Click a new location in the graph area of the trend.

Navigating Using the keyboard

Use these keys to change the X axis of the trend:

KeyAction
Left ArrowMove the trend to the right to see earlier data.
Right ArrowMove the trend to the left to see later data.
Ctrl + Left ArrowView the previous time interval
Ctrl + Right ArrowView the next time interval
Up ArrowZoom in the X axis by 20%.
Down ArrowZoom out the X axis by 25%.
HomeReset the position of the X axis back to the default
InsertToggle between tracking mode and fixed mode.
In tracking mode the X Axis moves with current time.
In fixed mode the X axis is stationary.

Further Information

Operator Interface

To learn about the other features of the Operator Interface.

Glossary

For the meaning of terms used in Fernhill SCADA.