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The pivot format uses JSON with a header and items structureitem structure.
The header object holds the common attributes of a telecontrol message.
Each item objects object holds the specific attributes of an information point whether it is a measurement, a state, a command, etc...
IEC 104 to pivot format translation
IEC 104 ASDU data model
Reference: NF EN 60870-5-101 § 7.3.1.22
TYPE IDENT 30: M_SP_TB_1
DATA UNIT IDENTIFIER
TYPE IDENTIFICATION
VARIABLE STRUCTURE QUALIFIER
CAUSE OF TRANSMISSION
COMMON ADDRESS OF ASDU
INFORMATION OBJECT 1
INFORMATION OBJECT ADDRESS
SIQ
CP56Time2a
INFORMATION OBJECT i
INFORMATION OBJECT ADDRESS
SIQ
CP56Time2a
Pivot format conversion configuration model
| Code Block | ||
|---|---|---|
| ||
{
"protocol_translation_layer":{
"name":"iec104_to_pivot",
"version":"1.0",
"mapping":{
"data_object_header":{
"doh_type":"type_id",
"doh_ca":"ca",
"doh_oa":"oa",
"doh_cot":"cot",
"doh_flag_1":"istest",
"doh_flag_2":"isnegative"
},
"data_object_item":{
"doi_address":"ioa",
"doi_value":"value",
"doi_quality":"quality_desc",
"doi_ts":"time_marker",
"doi_ts_flag1":"isinvalid",
"doi_ts_flag2":"isSummerTime",
"doi_ts_flag3":"isSubstituted"
}
}
}
} |
Conversion process
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NB: The conversion process shall produce as many pivot format objects as information objects in the source ASDU.
Pivot format resulting object
| Code Block | ||
|---|---|---|
| ||
{
"data_object_header":{
"doh_type":"some_value",
"doh_ca":"some_value",
"doh_oa":"some_value",
"doh_cot":"some_value",
"doh_flag_1":"some_value",
"doh_flag_2":"some_value"
},
"data_object_item":{
"doi_address":"some_value",
"doi_value":"some_value",
"doi_quality":"some_value",
"doi_ts":"some_value",
"doi_ts_flag1":"some_value",
"doi_ts_flag2":"some_value",
"doi_ts_flag3":"some_value"
}
} |