Running a Log Session with the Data Logging Workspace Control

NI VeriStand 2018 Help

Edition Date: May 2018

Part Number: 372846M-01

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Parent Topic: Host-Side Logging with the Data Logging Workspace Control

Use the Data Logging control on the workspace to start and stop a log session and to document observations while a log session is running. To view past log sessions and the files associated with them, you can also launch the File History dialog box from the control

The following sections provide information about common tasks for operating the Data Logging control:

Related Links

Configuring the Data Logging Control

Start and Stop a Log Session

To start a log session, click the Start Logging button on the Data Logging control. The log session starts immediately unless an administrator configured the control to start based on a start trigger. If the Data Logging control uses a start trigger, the control will wait for the start trigger before logging.

Logging stops when you click the Stop Logging button, after a specified amount of time has elapsed, or based on a stop condition, as configured by the administrator.

Related Links

Start Trigger Page (Edit Settings Dialog Box)

Stop Trigger Page (Edit Settings Dialog Box)

Capture Notes about a Log Session

You can add notes to a log session to document observations, such as errors or peculiar behaviors, at the time they occur.

To add a note, click the Enter Note button on the Data Logging control while logging. Enter your note. The note saves two pieces of information: a timestamp and the information you enter.

Note   The timestamp corresponds to when you press the Enter Note button, not when you save the note. This allows you to record exactly when you noticed the behavior that prompted the note.

View the Results of a Log Session

You can view information about past log sessions and any files generated during those log sessions with the File History dialog box. To display the File History dialog box, click the History button on the Data Logging control.

In the File History dialog box, log sessions appear as timestamps in the Sessions configuration tree. Select a session, and the time, SessionGUID, and any properties entered at the start of the session appear in the list on the right.

Tip   Each log session has a unique SessionGUID that appears as a root file property in the TDMS log files and user notes files generated during the log session. You can use the SessionGUID to link all files generated during the same log session when analyzing data.

Each session history contains all the files created during that session.

Select any file in the Sessions configuration tree to display the file path and size as well as the date it was last modified. To open the file, double-click it.

Note  If you do not have a specified application for viewing TDMS files, you can view the file in the TDMS Filer Viewer workspace tool. To do so, right-click the file and select View File in TDMS File Viewer.


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