Applies To:
  • CitectSCADA x.xx
  • CitectHMI x.xx
  • CitectFacilities x.xx


On a trend page, if you change the trend span, then open the end time form and click on the 'OK' button without making changes, the displayed end time value decreases from the expected value.






What is happening is that the display is interpolated because of the trend span change, and the display mode is set to historical mode because the set time is now less that the actual end time.  In historical mode the display does not update with new samples.  The new span may mean that the end time is not on an actual sample.

Of course a similar thing happens if you do not first adjust the trend span except the displayed end time should match the sample and not adjust.
In this case, if you wait for the next sample period to tick over then click OK without adjusting the end time, it will set the display to historical mode and set the displayed end time.

If you do not wish to change the trend mode and the end time then click on the Cancel button instead.