Detailed Description

The AlarmOperator triggers an alarm based on default input value

An AlarmOperator has no effect on the value. It sets output equal to input.

The AlarmOperator implements an alarm based on best practices from EEMUA Publication 191.

Properties

Arguments

When operator is used inside a signal its default input is automatically tied to signal's InternalValue or previous operator's output. Its default output is automatically tied to next operator's input or to signal's Value. See also CDP Operator Usage In CDP Signals.

The workings of the AlarmOperator is illustrated on the following chart:

Actual Processing Code of the AlarmOperator

unsigned int AlarmOperator<T>::Process()
{
  d->If_Acked_AckAlarmAndClearRepeatBlockedAndRepeatCount();
  d->If_ResetTimesActivatedChangedTrue_ResetTimesActivated();

  d->SetOrClearOperatorBlockedStatus();
  d->SetOrClearProcessBlockedStatus();

  d->If_OperatorBlocked_UnackClearAndBlock();
  d->If_ProcessBlocked_ClearAndBlock();

  if(!d->IsBlocked())
  {
    d->DecrementRepeatCount();
    d->CheckHighLevelAndSetOrClearAlarm();
    d->CheckLowLevelAndSetOrClearAlarm();
  }
  d->If_StatusChanged_SendEventsAck_ClearOrSet();

  m_output = m_input;

  if (d->status!=d->lastStatus)
    if (auto parent = GetParent())
      parent->RunInComponentThread([=](){ parent->UpdateStatus(GetNodeID(), d->status); });

  d->StoreLastValues();

  return Status();
}