Applies To:
  • CitectSCADA 5.31, 5.40, 5.40 Service Pack A, 5.40 Service Pack B

If several PLCs are supplying trend data at the same sampling rate and one of the PLCs fails (or is unplugged), the other PLCs, including any disk PLCs, may stop supplying data for several seconds. 

CIT has confirmed this to be a problem in Citect for Windows versions 5.31 to 5.40SPkA. This problem has been fixed in version 5.41. At the same time, the default value for [TREND] GapFillTime has been increased from 5000 to 10000.