Name of a condition, if this is an Alarm Event. Possible values for this property are Dead Band: Dead Band-type Alarm Source, Digital: Digital-type Alarm Source, Discrete: Discrete-type Alarm Source, Level: Analog-type Alarm Source, or RateOfChange: Rate of Change-type Alarm Source. If this Event is not an Alarm, this property is always an empty String. This is a read-only property.