Datasheet

71M6543F/71M6543G Data Sheet
v2 125
Table 83: CE Pulse Generation Parameters
CE
Address
Name Default Description
0x21
WRATE
227
Kh = VMAX*IMAX*K / (WRATE*N
ACC
*X) Wh/pulse
where:
K = 76.3594 when used with local sensors (CT or shunt)
K = 54.5793 when used with 71M6xx3 remote sensors
0x22
KVAR
6444
Scale factor for VAR measurement.
0x23
SUM_PRE
2184
Number of samples per accumulation interval, as specified in
SUM_SAMPS[12:0], I/O RAM 0x2107[4:0], 0x2108[7:0]
(N
ACC
).
0x45
APULSEW
0
Wh pulse (WPULSE) generator input to be updated by the MPU
when using external pulse generation. The output pulse rate is:
APULSEW * F
S
* 2
-32
* WRATE * X * 2
-14
.
This input is buffered and can be updated by the MPU during a
conversion interval. The change takes effect at the beginning of
the next interval.
0x46
WPULSE_CTR
0
Counter for WPULSE output.
0x47
WPULSE_ FRAC
0
Unsigned numerator, containing a fraction of a pulse. The value
in this register always counts up towards the next pulse.
0x48
WSUM_ ACCUM
0
Roll-over accumulator for WPULSE.
0x49
APULSER
0
VARh (VPULSE) pulse generator input.
0x4A
VPULSE_CTR
0
Counter for VPULSE output.
0x4B
VPULSE_ FRAC
0
Unsigned numerator, containing a fraction of a pulse. The value
in this register always counts up towards the next pulse.
0x4C
VSUM_ACCUM
0
Roll-over accumulator for VPULSE.
Other CE Parameters
Table 84 shows the QUANT CE parameters used for suppression of noise due to scaling and truncation
effects. The equations for calculating the LSB weight of each QUANT parameter are provided at the
bottom of Table 84.