Environmental monitor analog-to-digital converter event. If enabled, this trap is sent when the envMonADCStatus indicates an error state ('countLow' or 'countHigh'). This trap is repeated periodically while the envMonADCStatus remains in an error state. If the envMonADCStatus returns to a non-error state ('normal'), this trap is sent once more with the non-error envMonADCStatus, and then stops being repeated.