YOKOGAWA WT1800 User Manual page 119

* Numeric Data Formats
(1) Normal Data
• The Σ of electric power values P, S, and Q
• Integrated values WH, WHP, WHM, AH, AHP, AHM, WS, and WQ
• Efficiency values ETA1, ETA2, ETA3, and ETA4; harmonic distortion factor values UHDFk,
IHDFk, and PHDFk; and distortion factor values UTHD, ITHD, and PTHD.
ASCII: <NR3> format (mantissa: up to 6 digits, exponent: 2 digits. Example: [-]123.456E+00)
FLOAT: IEEE single-precision floating point (4-byte) format
• Elapsed integration time (TIME)
ASCII: <NR1> format in units of seconds. Example: 3600 for 1 hour (1:00:00).
FLOAT: IEEE single-precision floating point (4-byte) format in units of seconds. Example:
0x45610000 for 1 hour (1:00:00).
• User-Defined Events (EV1 to EV8)
ASCII: The character strings that indicate that conditions are met and that conditions are not
met (the default values are "True" and "False")
FLOAT: 0x3F800000 (1) when the conditions are met and 0x00000000 (0) when the conditions
are not met
• No items (NONE)
ASCII: NAN (Not A Number)
FLOAT: 0x7E951BEE (9.91E+37)
• Other
ASCII: <NR3> format (mantissa: up to 5 digits, exponent: 2 digits. Example: [-]123.45.456E+00)
FLOAT: IEEE single-precision floating point (4-byte) format
(2) Error Data
• Data does not exist (the display shows "---------")
ASCII: NAN (Not A Number)
FLOAT: 0x7E951BEE (9.91E+37)
• Over-range (the display shows "---O L---")
• Overflow (the display shows "---O F---")
• Data over (the display shows " Error ")
ASCII: INF (INFinity)
FLOAT: 0x7E94F56A (9.9E+37)
Note
• In 180° (Lead/Lag) display, the phase differences Φ (PHI) of elements 1 to 6 are output in the range
between -180.00 to 180.00 with lead (D) and lag (G) set to negative and positive values, respectively.
• There may be up to six digits in the mantissa of the Σ of power values P, S, and Q depending on the
combination of the voltage range and current range (e.g. the power range).For the table of power ranges,
see the getting started guide, IM WT1801-03EN.
• The following values always have three decimal places: efficiency values ETA1, ETA2, ETA3, and ETA4;
harmonic distortion factor values UHDFk, IHDFk, and PHDFk; and distortion factor values UTHD, ITHD,
and PTHD.If the values exceed 100 %, the mantissa will have six digits.
IM WT1801-17EN
5.17 NUMeric Group
App
Index
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