private void CheckForBelowAlarm(Series s, alarm_definitionRow alarm, AlarmCondition c)
{
foreach (Point p in s)
{
if (!p.FlaggedBad && !p.IsMissing && p.Value < c.Value)
{
Console.WriteLine("Alarm below found");
CreateAlarm(alarm, p);
break;
}
}
}
private void CheckForAboveAlarm(Series s, alarm_definitionRow alarm, AlarmCondition c)
{
foreach (Point p in s)
{
if (!p.FlaggedBad && !p.IsMissing && p.Value > c.Value)
{
Logger.WriteLine("alarm_condition: " + alarm.alarm_condition);
Logger.WriteLine("Alarm above found: " + p.Value);
CreateAlarm(alarm, p);
break;
}
}
}
private void CheckForRateOfChangeAlarm(Series s, alarm_definitionRow alarm, AlarmCondition c)
{
Logger.WriteLine("Checking Rate of Change: " + c.Condition + " " + c.Value);
// need data one time step before.. read from database.
if (s.TimeInterval == TimeInterval.Irregular)
{
s.Read(s.MinDateTime.AddMinutes(-20), s.MaxDateTime.AddMinutes(1));
}
else if (s.TimeInterval == TimeInterval.Daily)
{
s.Read(s.MinDateTime.AddDays(-1), s.MaxDateTime.AddMinutes(1));
}
for (int i = 1; i < s.Count; i++)
{
var pt = s[i];
var prev = s[i - 1];
if (!pt.IsMissing && !pt.FlaggedBad
& !prev.IsMissing && !prev.FlaggedBad)
{
double hrs = pt.DateTime.Subtract(prev.DateTime).TotalHours;
double change = 0;
if (c.Condition == AlarmType.Rising)
{
change = (pt.Value - prev.Value) / hrs;
}
;
if (c.Condition == AlarmType.Dropping)
{
change = (prev.Value - pt.Value) / hrs;
}
Logger.WriteLine(pt.ToString() + " Change per hour: " + change.ToString("F2"));
if (change > c.Value)
{
Console.WriteLine("Alarm " + c.Condition);
CreateAlarm(alarm, pt);
break;
}
}
}
}