private static bool EvaluateStatus(IPlcStatusProvider provider)
{
// By default any PlcStatusCode unequal to NoError will lead to a PlcException.
// In this scenario we ignore the case that a PLC device can be temporary offline
// and therefore unavailable. Additionally we do also ignore Timeouts in cases of
// a bad network connection and access to missing data areas (NoData).
PlcStatus status = provider.Status;
Console.WriteLine();
Console.WriteLine("--> {0}.Status.Evaluate: {1}", provider.GetType().Name, status.Code);
Console.WriteLine("----> TimeStamp: {0}", status.TimeStamp.ToString("hh:mm:ss.fff"));
Console.WriteLine("----> Text: {0}", status.Text);
if (status.Type != null)
{
Console.WriteLine("----> Type: {0}", status.Type);
}
PlcStatusCode statusCode = status.Code;
return(statusCode == PlcStatusCode.NoError ||
statusCode == PlcStatusCode.CpuNotFound ||
statusCode == PlcStatusCode.Timeout ||
statusCode == PlcStatusCode.NoData);
// Instead of the whole code above is also possible to clear out all types of error and
// information codes by just always returning the value true. The value true does
// indicate that each status of any provider has been evaluated by custom code and no
// further framework evaluation is required.
//// return true;
}
private void evaluateStateBit(bool stateBit, bool unknownValue = false)
{
var now = DateTime.Now;
if (stateBit != _prevBitState)
{
log.Info($"cambio stato: da {_prevBitState} a {stateBit}");
_prevBitState = stateBit;
_prevTime = now;
_plcBit.OnNext(stateBit);
if (_prevStatus != PLC.PlcStatus.Ok)
{
log.Warn($"rientro dallo stato di allerta: da {_prevStatus} a {PLC.PlcStatus.Ok}");
_prevStatus = PLC.PlcStatus.Ok;
_plcStatus.OnNext(_prevStatus);
}
}
else
{
log.Debug($"check threshold");
TimeSpan ts = (now - _prevTime);
if (ts > _timeThreshold)
{
log.Warn($"soglia superata da {ts.TotalMilliseconds} millis");
if (_prevStatus == PLC.PlcStatus.Ok)
{
_prevStatus = (unknownValue ? PLC.PlcStatus.NotResponding : PLC.PlcStatus.ThresholdReached);
_plcStatus.OnNext(_prevStatus);
}
}
}
}
private static void HandleValueStatusChanged(object sender, EventArgs e)
{
// The Status.Changed event does provide low level operational status information and
// does therefore reflect the result of the most recent operation performed on the low
// level driver used by the framework.
PlcStatus status = (PlcStatus)sender;
Console.WriteLine();
Console.WriteLine("--> Value.Status.Change: {0}", status.Code);
Console.WriteLine("----> TimeStamp: {0}", status.TimeStamp.ToString("hh:mm:ss.fff"));
Console.WriteLine("----> Text: {0}", status.Text);
if (status.Type != null)
{
Console.WriteLine("----> Type: {0}", status.Type);
}
}
public PlcStatusArgs(PlcStatus status)
{
this.plcStatus = status;
}
