Applies To:
  • CitectSCADA 3.40 4.20

If an event SPC trend page is configured the trend will scroll regardless of whether the trigger is on or off. Essentially every time the trend tries to scroll forward, the existing data is scrolled and a copy is added to the display, causing the trend to copy blocks of data over and over. Under certain conditions the trend will scroll backwards. This also generates problems with the data buffer, which means that the cursor data may also appear to be incorrect. 

This problem has been fixed in Version 5.00 and a patch will be made available for Versions 3.4 and 4.2 in the near future.