Applies To:
  • CitectSCADA
Summary:
Time Stamped alarms cannot specify a time which is greater than a day old. 

Solution:
To enhance time stamped alarms three new time stamped alarm types have been added.  They all allow the time stamp to be a negative offset from midnight of the next day (or midnight of the current day depending on how this is viewed).  The actual offset is always positive when specified but is treated as a full negative offset. T he new types are:

8 - Negative BCD Offset - stored as Hexadecimal. Set the high byte equal to represent the total number of hours of the history. The maximum history is 99 hours (4 days) from midnight of the next day.

9 - Negative BCD Offset - stored as Decimal. Set the high byte to represent the total number of hours of the history. The maximum history is 4293 hours (178 days) from midnight of the next day.

10 - Negative Millisecond Offset. The maximum history is 49 days from midnight of the next day.

These are set by the parameter [Alarm]HresType. See the Online Help for more information about time stamped alarms.

This enhancement will be available in Version 5.21 Service Pack B.

 
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