Edit Trends Menu (version 23)

The 'EDIT TRENDS' menu can be accessed by clicking the "pen" icon on the toolbar at the top or by right-clicking anywhere on the chart space once a tag has been loaded. 

When opening the 'EDIT TRENDS' menu, the user will be presented with the trends on the left-hand side of the menu and the properties of those trends on the right. To edit a trend's properties, simply check the box next to the trend then modify the properties as needed. Multiple trends can be selected at once.

1. Add trends
2. Create a calculated trend
3. Remove selected trends
4. Rearrange order of trends

Trend Properties

General

• Display Name - the name that appears on the chart and in the legend. This can be edited. Tag names must be unique within the chart. If a duplicate tag is added to the chart, a (1) will be appended to it.
• Color - the color of the trend
• Line Thickness - the thickness of the trend
• Time Shift - used to shift the trend forwards or backwards in time by a set number of days, hours, minutes, and/or seconds
• Aggregate Kind - the aggregate used to process the data when it is drawn. The default aggregate is 'TimeAverage2' unless the datatype is Boolean or String, in which case, it is 'StartBound'.
• Aggregate Interval - specifies the time duration for each block of processed data drawn on the chart

A trend using the TimeAverage2 aggregate and an Aggregate Interval of 1 minute will return a time-weighted average for every minute on the chart.

• Show Trend - turns the trend's visibility on/off
• Show Grid Lines - turns a trend's horizontal grid lines on/off
• Show Float Label - turns a trend's Float Label on/off

Scale

• Scale Range - the range to be used for the min/max values
  • Auto - the min/max scale is automatically determined based on the values of the trend within the chart
  • Auto Min - the min scale is automatically determined, but the max scale is manually set
  • Auto Max - the max scale is automatically determined, but the min scale is manually set
  • Default - uses the High and Low Scale properties of the tag stored in the historian if they exist
  • Manual - the min/max scale are both manually set
  • [TrendName] - uses the same scale of the trend selected

These settings can also be found by right-clicking on the scales themselves when on the chart screen.

• Max Value - used to manually set the max scale value
• Min Value - used to manually set the min scale value
• Show Left Scale - turns the trend's left scale on/off
• Show Right Scale - turns the trend's right scale on/off
• Use Logarithmic Scale - uses a logarithmic scale instead of a linear scale

Band

• Band Range - the vertical space given to each trend
  • Auto - trends are given equal vertical space on the chart
  • Full - trends use the entire vertical space on the chart
  • Manual - bands are manually set with 'Band Start' and 'Band Height'
  • [TrendName] - the trend will share the same vertical space as the trend selected
• Band Start (0-100) - a percentage indicating the starting position of the scale within the chart, 0 being the top of the chart and 100 the bottom
• Band Height (0-100) - a percentage indicating the vertical height of the scale

An easier alternative for adjusting 'Band Start' and 'Band Height'...

Bands can be moved by click-and-dragging the scales themselves when on the chart screen. Also, they can be resized when the cursor hovers over the top or bottom edge of a scale. The cursor will change to allow you shrink or expand the band height.

Format

• Number Format - the number of digits displayed on the cursor value
  • Decimal - specifies how many decimal places should be displayed
  • General - specifies how many significant digits should be displayed
  • Scientific - the cursor value and scale are displayed in scientific notation
• Digits - used in conjunction with 'Number Format' to determine how many digits are to be displayed

High Limit

• Fixed - sets a fixed high limit on the trend based on the 'Value' set
• Variable - sets a variable high limit on the trend based on the 'Trend' selected
• Change Color - changes the color of the trend when it exceeds the high limit
• Fill Area - fills in the area underneath the trend when it exceeds the high limit                                                                                               (Fixed Example)

Low Limit

• Fixed - sets a fixed low limit on the trend based on the 'Value' set
• Variable - sets a variable low limit on the trend based on the 'Trend' selected
• Change Color - changes the color of the trend when it exceeds the low limit
• Fill Area - fills in the area above the trend when it exceeds the low limit                                                                                   (Variable Example)

Limit Lines

These are static horizontal lines that are drawn on the chart.

• Show Outside of Band Range - when enabled, the static line will still appear on the chart even if it falls outside of the trend's scale range
• Value - the value at which the horizontal line should be drawn
• Style - solid, dashed, or dotted
• Color - the color of the limit line