National Instruments BridgeVIEW Benutzerhandbuch
Chapter 6
Historical Data Logging and Extraction
6-6
© National Instruments Corporation
Activity 6-1. Use the Historical Data VIs
The objective of this exercise is to create a VI that programmatically
reads historical information from Citadel and determines statistical
information of the data.
reads historical information from Citadel and determines statistical
information of the data.
In this activity, you will read previously logged data, which is included in
the
the
BridgeVIEW\Activity\Data
directory. You will use
mytanks.scf
in the
BridgeVIEW\Activity
directory, as edited in Activity 3-1,
.
1.
Open a new VI and place a Historical Trend on the panel window from
the Controls»Graph palette. Change the maximum of the Y scale
to
the Controls»Graph palette. Change the maximum of the Y scale
to
1000
.
2.
Pop up on the Historical Trend and select HMI G Wizard…. If a
dialog box prompts you to locate a Citadel Data directory, open
dialog box prompts you to locate a Citadel Data directory, open
BridgeVIEW\Activity\Data
and select the current directory.
Complete the dialog box, as shown in the following illustration.