/// <summary>
/// Monitors the flow rate and adjustes voltage to pump as necessary in
/// order to maintain desired flowrate.
/// </summary>
protected override void Run()
{
try
{
if (!Pump.IsRunning())
{
return;
}
ConsoleState state = Master.ConsoleService.CurrentState;
if (state == ConsoleState.Diagnosing || state == ConsoleState.InteractiveDiagnostics)
{
return;
}
int openedPosition = Pump.GetOpenValvePosition();
if (openedPosition > 0)
{
DateTime openTime = Pump.GetTimePumpStarted();
DateTime now = DateTime.UtcNow;
Log.Debug(string.Format("Opened solenoid {0} at {1}", Pump.GetOpenValvePosition(), Log.DateTimeToString(openTime)));
Pump.FlowStatus flowStatus = Pump.CheckFlow();
if (flowStatus != Pump.FlowStatus.TooLow)
{
_flowFailures = 0;
if ((openTime != DateTime.MinValue) && ((now - openTime) > _periodAllowedOpen))
{
Pump.CloseValve(openedPosition); // Close the valve.
}
}
// Else, assumption is that FlowStatus is TooLow. (empty cylinder?)
else if (((now - openTime) > _minOpenPeriod) &&
Pump.IsRunning())
{
_flowFailures++;
Log.Debug("Flow failed " + _flowFailures + " times.");
if (_flowFailures >= _MIN_FLOW_FAILURES)
{
_flowFailures = 0;
Pump.CloseValve(openedPosition);
}
else
{
Pump.OpenValve(Pump.GetOpenValvePosition(), false);
}
}
}
}
catch (Exception e)
{
Log.Error(Name, e);
}
}
public virtual DateTime GetTimePumpStarted()
{
return(Pump.GetTimePumpStarted());
}