Technical Reference Manual - InduSoft

Alarms, Events, and Trends
Area / Element Name
Description
• Keep the settings consistent, so when the user closes the screen and opens it again, or re-starts your
project, the settings configured during runtime are not lost.
• Create standard settings for different scenarios and load the appropriate configuration during the
runtime, based on a pre-defined condition or based on the user-selection.
When the tag configured in this field changes value (e.g., toggles), the current settings of the Trend object
are saved in the temporary file. This command is not available for the Thin Client.
Load trigger
When the tag configured in this field changes value (e.g., toggles), the settings from the temporary file are
loaded and applied to the Trend object during runtime.
Note: After the screen where the Trend object is configured is saved, the settings are not
automatically loaded from the temporary file when the screen is opened again, unless the
Load trigger command is executed before the screen is closed.
Custom Point
Selection
Export to File
File Name
Auto Save
Screen
Point Number
Add Indicator
Trigger
File Name
If this field is left blank, the temporary file is saved in your project's Web sub-folder
with the syntax ScreenNameObjectIDTrendControl.stmp (e.g.,
MyScreen10TrendControl.stmp). The Thin Client station saves/loads the temporary file
in the standard Temp directory of the operating system (e.g., \Documents and Settings
\CurrentUser\Local Settings\Temp).
You can configure a customized file name for the temporary file in this field or even configure a string tag
between curly brackets, so the user can change the name of the configuration file dynamically during
runtime by changing the value of this tag. If you do not specify any path, the file is saved in your project's
Web sub-folder by default.
When this box is checked, the current settings of the Trend are automatically saved in the temporary file
when the screen where the Trend is configured is closed during runtime. If the box is not checked, the
settings are saved only when the Save trigger command is executed.
This interface allows you to create your custom dialog to modify or insert pens to the object.
Name of the screen which must be launched when the user triggers a command to modify or insert a new
pen to the object during runtime.
Point number (from the Points dialog), indicating the point associated to the pen that will be inserted or
modified during runtime.
Flag that indicates that the user triggered an action to insert a new pen (value 1) instead of modifying a pen
that is already been visualized (value 0).
When the tag configured in this field changes value (e.g., toggles), the current state of the trend control
is exported to an image file. The toolbar and scroll bar are not included. The legend and time display are
included only if the trend control is configured to show them.
The file path and name of the exported file.
If no path is specified, then the file is saved in the project directory. If no extension is specified, then it is
determined by Format.
Tip: You can specify a project tag in curly brackets (e.g., {tagname}), to
programatically change the file name during runtime.
Status
Format
Size
The tag configured in this field receives status codes that indicate the success or failure of the export.
The graphic format of the exported file.
If Auto is selected, then the format is determined by the extension specified in File Name. If Auto is
selected but no extension is specified, then the default format is BMP.
The image file is exported at full size by default. However, you can specify the width and height (in pixels).
Decimation Enable When this option is selected, the trends in the Trend Control object that are configured to show historical
data will have their data decimated before the trends are drawn. That means for each trend, the X-axis is
divided into a number of intervals (determined by Max Points) and all of the data points within each interval
are averaged together to be drawn as a single point. This can improve runtime performance when there is a
large amount of historical data to display, and it can make the trends easier to read.
Decimation only works when the trend control is in Stop Mode (a.k.a. Historical Mode).
Page 286
InduSoft Web Studio