71M6531D_10 Datasheet, PDF (95/120 Pages) Teridian Semiconductor Corporation – Energy Meter IC

FDS 6531/6532 005
Data Sheet 71M6531D/F-71M6532D/F
CE
Address
0x19
0x1F
0x39
Name
PHADJ_B
TEMP_NOM
DEGSCALE
Default
0
0
9174
Description
PHADJ _ X = 2^{20 0.02229 ⋅TANΦ at 60Hz}
0.1487 − 0.0131⋅TANΦ
PHADJ _ X = 2²⁰
0.0155 ⋅ TANΦ
at 50Hz
0.1241− 0.009695⋅TANΦ
This register contains the reference point for the temperature
measurement. At calibration temperature, the value read at
TEMP_RAW_X should be written to TEMP_NOM. The CE will calculate
the chip temperature TEMP_X relative to the reference temperature.
The scale factor for the temperature calculation. It is not necessary
to use values other than the default value.
4.3.10 Other CE Parameters
Table 66 shows the CE parameters used for suppression of noise due to scaling and truncation effects.
The table also includes the parameter which indicates the CE Code version.
CE Ad-
dress
0x22
0x26
0x27
0x2A
0x2B
0x2E
0x2F
0x35
0x36
0x37
Table 66: CE Parameters for Noise Suppression and Code Version
Name
Default
Description
KVAR
QUANT_A
QUANT_B
QUANT_VARA
QUANT_VARB
QUANT_IA
6448
0
0
0
0
0
QUANT_IB
0
0x63653331
0x61303463
0x00000000
This is the scale factor for the VAR calculation. No value
other than the default value should be applied.
These parameters are added to the Watt calculation for
element 0 and 1 to compensate for input noise and truncation.
LSB = (VMAX*IMAX / In_8) *7.4162*10^-10 W
These parameters are added to the VAR calculation for
element A and B to compensate for input noise and truncation.
LSB = (VMAX*IMAX / In_8) * 7.4162*10^-10 W
These parameters are added to compensate for input noise
and truncation in their respective channels in the squaring
calculations for I² and V².
LSB = VMAX²*7.4162*10^-10 V² and
LSB = (IMAX²/In_8²)*7.4162*10^-10 A²
Text strings holding the CE version information as supplied
by the CE data associated with the CE code. For example,
the words 0x63653331 and 0x61303463 form the text string
“ce31a04c”.
These locations are overwritten in operation.
4.3.11 CE Flow Diagrams
Figure 41 through Figure 43 show the data flow through the CE in simplified form. Functions not shown
include delay compensation, sample interpolation, scaling and processing of meter equations.
v1.3
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