71m6543h-igtr/f Maxim Integrated Products, Inc., 71m6543h-igtr/f Datasheet - Page 125
71m6543h-igtr/f
Manufacturer Part Number
71m6543h-igtr/f
Description
Energy Meter Ic
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.71M6543H-IGTRF.pdf
(157 pages)
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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.
5.4.8.1 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.
Address
Address
v1.0
0x8A
0x8B
0x8C
0x8D
0x8C
0x8D
0x84
0x85
0x86
0x87
0x88
0x89
0x8E
0x8F
0x8E
0x8F
0x90
0x91
0x92
0x90
0x91
0x92
CE
CE
CE
VAR0SUM_X
VAR1SUM_X
VAR2SUM_X
VARSUM_X
V0SQSUM_X
V1SQSUM_X
V2SQSUM_X
V0SQSUM_X
V1SQSUM_X
V2SQSUM_X
I0SQSUM_X
I1SQSUM_X
I2SQSUM_X
I3SQSUM_X
I0SQSUM_X
I1SQSUM_X
I2SQSUM_X
I3SQSUM_X
W0SUM_X
W1SUM_X
W2SUM_X
WSUM_X
Name
Name
Name
Table 82: CE Energy Measurement Variables (with Shunts)
Table 83: CE Energy Measurement Variables (with CTs)
© 2008–2011 Teridian Semiconductor Corporation
The signed sum: W0SUM_X+W1SUM_X+W2SUM_X.
The sum of Wh samples from each wattmeter
element.
The signed sum:
VAR0SUM_X+VAR1SUM_X+VAR2SUM_X.
The sum of VARh samples from each wattmeter
element.
Neutral Current:
Table 81: CE Transfer Variables (with CTs)
LSB
LSB
LSB
LSB
W
W
I
I
LSB
LSB
= 6.1903125*10
= 9.9045*10
= 1.0856*10
= 1.0856*10
LSB
LSB
I
I
= 6.3968*10
= 1.0856*10
V
V
= 1.0856*10
= 9.4045*10
Description
Description
Description
-13
-12
-12
* IMAX
VMAX IMAX Wh.
VMAX IMAX VARh.
-14
-13
-12
* IMAX
-12
* (IMAX
* (IMAX
-13
2
* VMAX
*VMAX
A
2
2
h (PRE_E=0)
A
2
2
2
) A
) A
h (PRE_E=1)
2
2
V
2
2
V
h
h
2
2
h
h
71M6543F/H Data Sheet
Figure 31
Figure 32
Figure 32
Configuration
Configuration
Configuration
(page 86)
(page 87)
(page 87)
125
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