BACnet.Protocol.EventParameters.ChangeOfValue (bacstack v0.0.1)

Represents the BACnet event algorithm ChangeOfValue parameters.

The ChangeOfValue event algorithm, for monitored values of datatype REAL, detects whether the absolute value of the monitored value changes by an amount equal to or greater than a positive REAL increment.

The ChangeOfValue event algorithm, for monitored values of datatype BIT STRING, detects whether the monitored value changes in any of the bits specified by a bitmask.

For detection of change, the value of the monitored value when a transition to NORMAL is indicated shall be used in evaluation of the conditions until the next transition to NORMAL is indicated. The initialization of the value used in evaluation before the first transition to NORMAL is indicated is a local matter.

For more specific information about the event algorithm, consult ASHRAE 135 13.3.3.

Summary

Types

t()

Representative type for the event parameter.

Types

t()

@type t() :: %BACnet.Protocol.EventParameters.ChangeOfValue{
  bitmask: tuple() | nil,
  increment: float() | nil,
  time_delay: non_neg_integer(),
  time_delay_normal: non_neg_integer() | nil
}

Representative type for the event parameter.