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{
   "data_object":{
      "do_type":"type_id",
      "do_ca":"ca",
      "do_oa":"oa",
      "do_cot":"cot",
      "do_test":"istest",
      "do_negative":"isnegative",
      "do_ioa":"ioa",
      "do_value":"value",
      "do_quality":"quality_desc",
      "do_ts":"time_marker",
      "do_ts_valid":"isinvalid",
      "do_ts_sum_time":"isSummerTime"
   }
}

Multiple type ids for IEC 104 ASDUs in the monitor direction

As stated in the IEC 104 60870-5-101:2003 standard document §7.2.4 COMMON ADDRESS OF ASDUs: "The information object address may be specified independently from the ASDU (type identification) which transmits the particular information object. Information objects may be transmitted with the same information object addresses using different ASDUs, for example, as a single-point information with or without time tag."

Based on Table 15 – ASDUs in the monitor direction which may transmit objects with equal information object addresses, the following rules shall be implemented:

Any check against type ids should be considering the following combinations table:

Example:  any transmitted ASDU with type id M_SP_* type id is considered as valid if the exchange data configuration of a given datapoint specifies one the type id: M_SP_NA_1, M_SP_TA_1, M_SP_TB_1 and M_PS_NA_1

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