C74 User Guide
MICS
Logical Nodes List
The following table contains the list of logical nodes implemented in the device:
L: System Logical Nodes
LPHD (physical device information)
LLN0 (logical node zero)
G: Logical Nodes for Generic References
GGIO (generic process I/O)
S: Logical Nodes for Sensors and Monitoring
SIML (insulation medium supervision [liquid])
SIML–Insulation medium supervision (liquid)
The IEC 61850-7-4 ed.1 SIML node was extended with data objects defined in technical report
IEC 61850-90-4, ed.1.
SIML
DO Name CDC Explanation M/O/C/E
LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2)
Data Objects
Common Logical Node Information
Mod INC Mode M
Beh INS Behavior M
Health INS Health M
NamPlt LPL Name plate M
Measured Values
H2O MV Relative saturation of moisture in insulating liquid (in %) O
H2OTmp MV Temperature of insulating liquid at point of H₂O measurement O
H2 MV Measurement of hydrogen (in ppm) O
H2Oppm MV Measurement of moisture (in ppm) E
H2RoC MV Hydrogen rate of change (RoC in ppm/day) E
MstRoC MV Moisture rate of change (RoC in ppm/day) E
CH4 MV Measurement of methane (in ppm) E
CH4ROC MV Methane rate of change (RoC in ppm/day) E
CO2 MV Measurement of carbon dioxide (in ppm) E
CO2ROC MV Carbon dioxide rate of change (RoC in ppm/day) E
CO MV Measurement of carbon monoxide (in ppm) E
COROC MV Carbon monoxide rate of change (RoC in ppm/day) E
C2H2 MV Measurement of acetylene (in ppm) E
C2H2ROC MV Acetylene rate of change (RoC in ppm/day) E
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