National Instruments BridgeVIEW 用户手册
Chapter 6
Historical Data Logging and Extraction
© National Instruments Corporation
6-9
on the data that is displayed. You can use the panning tool to display a
different section of data. The averages are updated automatically.
different section of data. The averages are updated automatically.
8.
Save the VI as
Historical Data.vi
in the
BridgeVIEW\
Activity
directory.
End of Activity 6-1.
Historical Trend Viewer (HTV)
The HTV is a stand-alone utility that enables you to look at historical data
in your system. The HTV limits you to viewing no more than eight tags at
a time. If you want to look at more tags in a single historical trend, you
should build your own utility using the Historical Data VIs.
in your system. The HTV limits you to viewing no more than eight tags at
a time. If you want to look at more tags in a single historical trend, you
should build your own utility using the Historical Data VIs.
To start the HTV, select Project»Historical Trend Viewer…. The HTV is
shown in the following illustration.
shown in the following illustration.
Figure 6-2. Historical Trend Viewer