UNION_BACNET_EP_COV_PARAM (UNION)ΒΆ

TYPE UNION_BACNET_EP_COV_PARAM : UNION

Contains the data for the Change of Value event type

Change of Value specifies an event that occurs when the absolute value of a referenced property changes by an amount equal to or greater than the Referenced_Property_Increment, and this condition remains for Time_Delay seconds.

InOut:

Name

Type

Comment

bitMask

IEC_BACNET_BIT_STRING

This parameter, of type BIT STRING, applies to the CHANGE_OF_BITSTRING event algorithm and the CHANGE_OF_VALUE event algorithm in the special case where the referenced property is a BIT STRING datatype. It represents a bitmask that is used to indicate which bits in the referenced property are to be monitored by the algorithm. A value of one in a bit position indicates that the bit in this position in the referenced property is to be monitored by the algorithm. A value of zero in a bit position indicates that the bit in this position in the referenced property is not significant for the purpose of detecting this CHANGE_OF_BITSTRING or CHANGE_OF_VALUE.

propIncrement

IEC_BACNET_REAL

This parameter, of type REAL, applies to the CHANGE_OF_VALUE event algorithm. It represents the increment by which the referenced property must change in order for the event to occur.