Applies To:
  • CitectSCADA 5.31, 5.40, 5.41, 5.42, 5.50, 6.0, 6.1, 7.0
  • CitectHMI 5.31, 5.40, 5.41, 5.42, 5.50, 6.0, 6.1, 7.0
Summary:

I noticed that some of my alarms appears to be triggered correctly but the display time when the alarm is turned on (i.e. the "Ontime") is ahead of the current time. How could this happen??


Solution:

This confusion is normally may be caused by the alarm format specified. In the case above, the configuration of the alarm format is as such:

{Date,14}^t{Tag,17}^t{OnTime,13}^t{OffTime,13}^t{DeltaTime,10}^t{Desc,44}^t{State,4}^t{Type,15}

And looking at the screenshot, The OnTime is listed as 16:05:45 and OffTime is listed as 08:33:31 together with the DeltaTime (the period where the alarm occurs) is 16:27:46 (hours). The information means that the alarm occurs at 4 o’clock in the AFTERNOON and being turned off at 8 o’clock in the MORNING which suggest that it occurs and being left overnight (i.e. the delta time to be 16+ hours).

The Date listed as 11/12/2008 is probably the thing that cause the main confusion. From the "Help" explanation, if you put the format {Date} , it will list the date on which the alarm CHANGED STATE which means when the alarm occurs and someone can only acknowledged it on the next day, the date will be UPDATED to the next day’s date. 
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