A Configuration database changes the manner in which data is collected from the data source on the server. This database is a set of connection properties for the connection between the data sources on the SQL server (the "input" for TrendWorX64 Logger) and the logger databases (the "output" from TrendWorX64 Logger). Properties such as how often data is refreshed, how timestamps are administered, and how the tag data and associated field information will be stored are part of a database Configuration.
Only one Configuration database can be active per machine at any time.
In TrendWorX64 Logger, there is one single configuration database for a specified logger database.
To Edit a Configuration Database:
From the Workbench, expand your Project in the Tree Explorer, then expand the Historical Data node. You'll see the TrendWorX64 Logger node of the Tree Explorer.
TrendWorX64 Logger Provider in the Workbench
Expand the TrendWorX64 Logger node.
Double-click the Configuration node.
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Right-click the Configuration node in the tree explorer, then click on Edit, as shown below.
Editing the Configuration Node from the Tree Explorer
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Select the Configuration node in the tree explorer, then click on the Edit button, shown below, in the Edit section of the Home ribbon in the Workbench.
Edit Button
This opens the Configuration properties in the right side of the Workbench, as shown below.
Configuration Properties in Workbench
You can set the following parameters:
Use Global Connection: This check box instructs the TrendWorX64 Logger to maintain an open database connection with each database group for the duration of the data-logging activity. By default, it is enabled which indicates TRUE. It should be used when the data-logging application writes frequently to the database; it yields better performance. However, if data collection rates are slower and logging to disk is configured to be slow, disabling this option may actually improve performance and the usage of machine and database server resources.
Use UTC Time: Enable this check box if you would like all time stamps stored in the database to use Coordinated Universal Time (UTC). This is to accommodate automatic Daylight Saving Time switching in Windows when the Data Logger is logging data.
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Note: All historical clients and reporting tools will always retrieve historical data in their local (non-UTC) time. |
Retrials and Retrial Delay: The data logger supports retrials as an option, if any data-logging operation fails. You have control over the number of retrials and the interval between these retrials in seconds.
Max Samples: Use this setting to control the maximum number of samples to be kept in the memory buffers prior to data logging on a per-signal (tag) basis. Lower the value of the Max Samples setting if you find that your machine is generating a large number of samples or consuming excessive amounts of resources.
Max Logging Packets: The Max Logging Packets option is used with the Retrials option to control the number of data-logging failures. It sets the maximum number of data-logging packets to keep in memory, so that in case of failed data logging, the logging activity will not use all available memory. The larger the number of retrials and max logging packets, the more memory the TrendWorX64 Logger will use.
Gas Theme: You can enter a Global Alias Theme directly into the text entry field or click on the 
icon to browse for one. Clicking on the icon opens the Set Global Themes and Aliases window.
Themes
In the Themes section of this window, you can click on the Add button, which opens the Edit Global Themes window. You can first use the top pulldown menu to select a Theme (and click Refresh to update with any newly added theme in the Global Aliasing provider). Once the Theme is selected, you can also select from associated Theme Items (this list changes according to the Theme selected). Next, you can set the Scope as either Absolute (which activates the pulldown menu beneath it, allowing you to set the absolute scope level) or Relative to current document level (which activates the text entry field [and up/down arrows] beneath it, allowing you to set the relative scope. Note that the value can be positive (affecting children) or negative (affecting parents). Once you have completed your settings, click OK, which returns you to the Set Global Themes and Aliases window.
Aliases
In the Aliases section of this window, you can click on the Add button, which opens the Edit Global Aliases window. You can enter an Alias Name in the text entry field or click on the ellipsis button [...] to open the Select Global Alias window. In this window, you can expand the Global Aliases node, select one, then click OK to return to the prior window. Next, you can enter a Value in the following text entry field. Next, you can set the Scope as either Absolute (which activates the pulldown menu beneath it, allowing you to set the absolute scope level) or Relative to current document level (which activates the text entry field [and up/down arrows] beneath it, allowing you to set the relative scope. Note that the value can be positive (affecting children) or negative (affecting parents). Once you have completed your settings, click OK, which returns you to the Set Global Themes and Aliases window.
Once you have made your selections and returned to the Set Global Themes and Aliases window, you will see your selected Themes and Aliases added to the Gas Theme text entry field.
Click the Apply button to save your settings and then Close the form. If you made changes that you do not want to save, click the Refresh button. The settings will revert to what they were before you made any changes, as ong as you did not already click the Apply button.
See Also:
