71M6531D Datasheet, PDF (93/115 Pages) Teridian Semiconductor Corporation – Energy Meter IC

FDS 6531/6532 005
Data Sheet 71M6531D/F-71M6532D/F
4.3.10 Other CE Parameters
Table 60 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.
Table 60: CE Parameters for Noise Suppression and Code Version
CE Ad-
dress
0x22
Name
KVAR
0x26
0x27
0x2A
0x2B
0x2E
QUANT_A
QUANT_B
QUANT_VARA
QUANT_VARB
QUANT_IA
Default
6448
0
0
0
0
0
0x2F
QUANT_IB
0
0x35
0x36
0x37
0x63653331
0x61303463
0x00000000
Description
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 ele-
ment 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 ele-
ment 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 40 through Figure 42 show the data flow through the CE in simplified form. Functions not shown
include delay compensation, sample interpolation, scaling and processing of meter equations.
Figure 40: CE Data Flow: Multiplexer and ADC
v1.2
© 2005-2009 TERIDIAN Semiconductor Corporation
93