Double point information with quality (:off, :on, etc.) and optional timestamp (M_DP_NA_1, M_DP_TA_1, M_DP_TB_1).
Summary
Types
@type t() :: %IEC60870.IO.Monitoring.DoublePointInformation{ ioa: non_neg_integer(), quality: byte(), timestamp: nil | IEC60870.Types.CPTime.CP24Time2a.t() | IEC60870.Types.CPTime.CP56Time2a.t(), value: :intermediate | :off | :on | :indeterminate }