Technical Reference Manual - InduSoft

Creating a New Project
way, you can select the table where the history data should be saved instead of writing the Table name
manually in the Name field.
Run-Time Pane
This area allows you set runtime values. The following fields are available:
• Status (output) checkbox: The tag in this field will receive one of the following values:
Value
Description
0 Disconnected from the database. The database is not available; your configuration is incorrect or it is an illegal operation.
1 The database is connected successfully.
2 The database is being synchronized.
• Reload (output): Specify a reload tag if you are using curly brackets in any of the configuration fields. When
you want to reconnect to the database using the updated values on your tags, set the tag on this field to 1.
IWS will update the configuration when trying to perform an action in the database, setting the tag back to
0 when it is finished.
See also:
Configuring a Default Database for All Task History.
CONFIGURE THE PERFORMANCE CONTROL SETTINGS
Configure the performance control settings to determine how memory is allocated for screen graphics during
run time.
The project runtime client software has been improved to keep screen graphics (e.g., objects, images, fonts)
in memory rather than load them from the hard drive each time a screen is opened. This makes opening and
switching screens much faster, which in turn improves the overall run-time performance.
Devices that run the client software often have limited memory, however, so it is necessary to change the
method of memory allocation as the memory becomes full.
Memory allocation states
When memory allocation is enabled (which it is by default) and you initially run your project, all unused
objects are kept in memory so that screens can be reopened or redrawn very quickly. This memory allocation
method or state is called Always.
As the memory fills with objects, however, the amount of free memory decreases and may eventually reach
the Dynamic Limit (i.e., the value configured in the Before starting dynamic allocation setting). When this happens,
unused objects may be kept in memory but are removed if the space is needed for other objects that are
actually being used. This memory allocation method or state is called Dynamic.
As the memory continues to fill with objects — typically because the project runtime client has many screens
open and therefore many objects being used — the amount of free memory decreases until it finally reaches
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