Trend Displays Part 3

Resources

Additional Trend Displays Videos

Trend Displays Part 1

Trend Displays Part 2

Tag Configuration Settings

Mask: A mask for the Current column in the Tag Info Grid and the SmartMouse value. Format masks are primarily used to determine the number of significant figures displayed 

for a numeric value. The syntax is “0” for a forced digit and “#” for an unforced digit. The default mask is determined by the default plot minimum and maximum for a given tag

Interpolation Types 

Linear: Draws a direct line from point to point.

State: Draws a horizontal line from one reading to the next, extending the line from the last data point to the current time. When the value changes, starts drawing a horizontal 

line from the new point. The last reading will be projected to the current time for updates. Draws a vertical line between horizontal lines.

State No Edge: Draws a horizontal line from one reading to the next, extending the line from the last data point to the current time. When the value changes, starts drawing a 

horizontal line from the new point. The last reading will be projected to the current time for updates.

State YX: When a new point comes in, draws a vertical line for the value change and a horizontal line for the time interval. State YX does not extend past the last data point.  

Data Quality Ranges

0-63 (Except 1): Bad quality

64-191: Uncertain quality

1 and 192-255: Good Quality

Data Quality-Data Export Relationship

Good and uncertain quality data points are included in the time stamp list on the exported data and values are interpolated.

Bad quality data points are not included in the time stamp list and interpolations will be blank on the export. 

If Force Good Quality is disabled, the last good quality point before the first bad quality point is repeated in exported data until the next good quality point. 

If Force Good Quality is enabled, bad quality points in the exported data will match the values on SmartMouse and no values will repeat.

Transcript

00:00 ⟶ 00:08

This video will introduce the final key features of Nexus trend displays and take 

a deeper dive into a few topics covered in previous trend videos.

00:08 ⟶ 00:16

The Tag Config menu is located in the Trend Configuration window, accessible from 

the Plot Area and Tag Info grid options menus.

00:17 ⟶ 00:24

Tag Config shows all tags in the trend display and allows users to view and adjust 

settings specific to each tag.

00:25 ⟶ 00:33

As with other grid menus in Nexus, column visibility, size, and order can be adjusted 

with Column Selector and by dragging the column headers.

00:34 ⟶ 00:39

The filter boxes in the top row can be used to filter the tags by one or more criteria.

00:40 ⟶ 00:46

Tag properties that are modifiable will turn into a text box and display a blue underline when clicked.

00:47 ⟶ 00:54

Note that changes made in Tag Config are only saved to the individual trend display and are not 

saved to the tag database.

00:54 ⟶ 01:00

A reference for each property can be found in the video notes, and we'll cover a few key details here.

01:00 ⟶ 01:06

First, note that changes to point size will only be visible if Show Points is enabled for the tag.

01:07 ⟶ 01:12

Points represent an instance of data collection between which interpolation is performed.

01:12 ⟶ 01:23

The interpolation type setting impacts how the values between points are calculated, 

meaning it also determines the values shown by SmartMouse and in Quick Statistics.

01:24 ⟶ 01:31

Each interpolation type distinctly impacts the appearance of the trace on the display, 

making it easy to identify different types.

01:32 ⟶ 01:43

When Draw to Now is enabled, the trace on the display will continuously update at the refresh rate 

and SmartMouse will show interpolated values on the trace, as demonstrated by the pink tag.

01:43 ⟶ 01:52

If disabled, tag traces and points will not update until the next data point is returned, 

as demonstrated by the blue and orange tags.

01:53 ⟶ 01:58

Note that Draw to Now is disabled for text tags and State YX interpolations.

01:59 ⟶ 02:06

The refresh rate just mentioned can be adjusted in the Trend Config tab along with 

other current value mode settings.

02:07 ⟶ 02:22

Back in Tag Config, if Force Good Quality is enabled, the display will show data quality as 

good for all data points, even if the source indicates the quality is bad, demonstrated here 

by how the orange trace is drawn for bad quality data when Force Good Quality is enabled.

02:22 ⟶ 02:27

The ranges for good, bad, and uncertain quality may vary depending on the historian.

02:28 ⟶ 02:31

Nexus uses OPC definitions to categorize data quality, which can be found in the video notes.

02:35 ⟶ 02:43

Another feature useful for monitoring data quality is the Show Bad Quality option, 

located in the Tag Info Grid options menus.

02:43 ⟶ 02:51

When enabled, both the SmartMouse description for data points and the points on the display will 

update to indicate data quality.

02:51 ⟶ 02:57

Bad quality data is displayed as crosshairs and labeled as bad quality in SmartMouse.

02:57 ⟶ 03:04

Uncertain quality data is displayed as normal and labeled as uncertain quality in SmartMouse.

03:04 ⟶ 03:09

Good quality data is displayed as normal and is not labeled in SmartMouse.

03:09 ⟶ 03:21

If Show Bad Quality is disabled, bad quality data will not be displayed, but SmartMouse 

will still show the quality descriptions when placed over the blank area on the plot where 

bad quality data is present.

03:22 ⟶ 03:27

Note that the aggregate type will impact how bad quality points are drawn on the plot.

03:27 ⟶ 03:32

Aggregates and Tag Builder are detailed in the Trend Displays Part 2 video linked in the video notes.

03:32 ⟶ 03:40

Data quality also impacts the results of data exports, a feature also described in the Trend Displays Part 2 video.

03:41 ⟶ 03:46

A summary of the effects of data quality on exports can be found in the video notes.

03:46 ⟶ 03:58

Finally, the Edit Tag menu located in the Tag Info Grid options menus and by selecting a row

in Tag Config on mobile devices can be used to edit a subset of Tag Config properties.