B&B Electronics VFG3000 - Manual - Manual (Page 135)

C ONFIGURING A V IRTUAL HMI P RIMITIVE D ESCRIPTIONS
R EVISION 1 P AGE 119
• The Sort Order property is used to choose whether files residing under the folder
should be displayed or not and if the order is from the newest or the oldest file.
The selection New File First will display the files from the newest to the oldest
when moving through the folder with the primitive. The selection Old Files First
will do the contrary.
• The Button Font property is used to select the required font for the navigation
buttons of the primitive.
• The Root Directory defines the root folder on the CompactFlash card where files
to be open reside. The viewer can only open files present under the indicated
folder and cannot navigate to other folders.
The picture below shows functionalities available on the file viewer once downloaded in an
Gateway. Here, the viewer is displaying the content of a CSV file available from the
CompactFlash Card. The file is accessed when the page with the primitive is displayed. The
Rescan button provides a way to reload the file content so the user has access to the latest
data. The Prev and Next button are used to navigate from one file to another. They are
available only if more than one file is present in the folder.
T HE T RENDING P RIMITIVES
The Data Logger primitive provides a fixed view of the data contained within a
data logger. The number of data points to be displayed may be defined, and
channels may be shown or hidden using a bit-mask.
The Trend Viewer primitive provides a more advanced interactive view of a data
logger, allowing the operator to zoom in, zoom out, and to scroll backwards and
forwards through historical data that is saved in the logger’s history buffer.
Name of the file displayed
File number in the folder
Total number of files in the folder