Analysis Page

The Analysis Page offers two options for viewing data trends. In both options you must select the tags that are to be included. To be available for viewing in trends, a tag must be included in a device profile, and it must have the Trend Tag box checked.

Trend data is automatically logged when you check Trend Tag for tag and then add it to the project. If too many tags are chosen as trend tags, it could cause the hard drive to fill up.

NOTE: The maximum number of tags (pens) that will display correctly on the screen is ten. If you exceed ten pens, labels for these pens will not display correctly. Use one of these methods to correct this issue:

  1. Enlarge the window to accommodate the extra pens/labels.
  2. Write custom code to cause the labels to always be in the same position, overlapping each other when the trend pen is created. The user can then move the label around for better viewing.
  3. As with option 2, control the label positions with code; but then, move the labels back to that same spot when a user selects the trend pen again.

There are 2 methods of calculating disk space usage: scaled and floating point. For more information on these calculations, see Calculating Disk Storage in the Plant SCADA help file ( ..\Program Files (x86)\Schneider Electric\Power Operation\v2024\bin\Help\SCADA Help).

Trending: Use this option to view historical trends. To select tags, click Add Pen on the toolbar:

Then associate the pen with a tag. By default, most trend data is polled every 15 minutes, and it is stored for one year in the trend tags, or until it is FIFO’d out. Some tags are polled every 5 seconds and are stored for two weeks. These tags are:

  • Current A
  • Current B
  • Current C
  • Apparent Power Total
  • Reactive Power Total
  • Real Power Total
  • Voltage A-B
  • Voltage B-C
  • Voltage C-A
  • Frequency
  • Power Factor Total

Instant Trend: Use this option to view real-time trends. This allows viewing of data that is not set up for storage. To select tags for this trend, click Instant Trend Selector on the toolbar:

NOTE: If one of the pens returns a value of "1.#R,' the tag selected was not valid; no number could be reported for it. None of the values for any of the pens in the trend will be updated. To solve this issue, close the trend and open it again. This time, do not include the pen that gave the invalid return.

For either trending option, click Help for help using the tool: