Datasheet

71M6543F/71M6543G Data Sheet
122 v2
Table 79: CE Transfer Variables (with CTs)
CE
Address
Name Description
Configuration
0x84
WSUM_X
The signed sum: W0SUM_X+W1SUM_X+W2SUM_X.
Figure 32 (page 87)
0x85
W0SUM_X
The sum of Wh samples from each wattmeter
element.
LSB
W
= 1.0856*10
-12
VMAX IMAX Wh.
0x86
W1SUM_X
0x87
W2SUM_X
0x88
VARSUM_X
The signed sum:
VAR0SUM_X+VAR1SUM_X+VAR2SUM_X.
0x89
VAR0SUM_X
The sum of VARh samples from each wattmeter
element.
LSB
W
= 1.0856*10
-12
VMAX IMAX VARh.
0x8A
VAR1SUM_X
0x8B
VAR2SUM_X
WSUM_X and VARSUM_X are the signed sum of Phase-A, Phase-B and Phase-C Wh or VARh values
according to the metering equation specified in the control field EQU[2:0] (I/O RAM 0x2106[7:5]).
WnSUM_X is the Wh value accumulated for phase n in the last accumulation interval and can be computed
based on the specified LSB value.
For example, with VMAX = 600 V and IMAX = 208 A, the LSB for WnSUM_X is 0.135 µWh.
5.3.8.1 Instantaneous Energy Measurement Variables
InSQSUM_X and VnSQSUM are the squared current and voltage samples acquired during the last accumulation
interval. INSQSUM_X can be used for computing the neutral current.
Table 80: CE Energy Measurement Variables (with Shunts)
CE
Address
Name Description Configuration
0x8C
I0SQSUM_X
Neutral Current:
LSB
I
= 9.9045*10
-13
* IMAX
2
A
2
h (PRE_E=0)
LSB
I
= 6.1903125*10
-14
* IMAX
2
A
2
h (PRE_E=1)
Figure 31 (page 86)
0x8D
I1SQSUM_X
LSB
I
= 6.3968*10
-13
* (IMAX
2
) A
2
h
0x8E
I2SQSUM_X
0x8F
I3SQSUM_X
0x90
V0SQSUM_X
LSB
V
= 9.4045*10
-13
*VMAX
2
V
2
h
0x91
V1SQSUM_X
0x92
V2SQSUM_X
Table 81: CE Energy Measurement Variables (with CTs)
CE
Address
Name Description Configuration
0x8C
I0SQSUM_X
LSB
I
= 1.0856*10
-12
* (IMAX
2
) A
2
h
Figure 32 (page 87)
0x8D
I1SQSUM_X
0x8E
I2SQSUM_X
0x8F
I3SQSUM_X
0x90
V0SQSUM_X
LSB
V
= 1.0856*10
-12
* VMAX
2
V
2
h
0x91
V1SQSUM_X
0x92
V2SQSUM_X