Setting the Event configuration property to Out of range enables the Out of range extension. This extension detects whether a numeric object property value exceeds a range defined by a high limit and low limit. The Command failure extension can be applied to Analog_Input, Analog_Output, Analog_Value and Pulse_Converter objects.

Selecting the Out of range extension enables the properties outlined in this table.

Property name


High limit

Specifies the high limit of the normal range.

Low limit

Specifies the low limit of the normal range.

Hysteresis to normal

Specifies the deadband that is applied to the respective limit before a return to Normal event state is indicated.
NOTE: The object's present value must be less than the difference between the High limit value and deadband value or greater than the sum of the Low limit value and the deadband value before a return to the Normal event state occurs.

Time delay

Specifies the amount of time that must pass between detecting offnormal conditions and sending an event notification. Enter a time in seconds.